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1

Effect of the shutdown of a large coal-fired power plant on ambient mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Effect of the shutdown of a large coal-fired power plant on ambient mercury Effect of the shutdown of a large coal-fired power plant on ambient mercury species Title Effect of the shutdown of a large coal-fired power plant on ambient mercury species Publication Type Journal Article LBNL Report Number LBNL-6097E Year of Publication 2013 Authors Wang, Yungang, Jiaoyan Huang, Philip K. Hopke, Oliver V. Rattigan, David C. Chalupa, Mark J. Utell, and Thomas M. Holsen Journal Chemosphere Volume 92 Issue 4 Pagination 360-367 Date Published 07/2013 Abstract In the spring of 2008, a 260MWe coal-fired power plant (CFPP) located in Rochester, New York was closed over a 4 month period. Using a 2-years data record, the impacts of the shutdown of the CFPP on nearby ambient concentrations of three Hg species were quantified. The arithmetic average ambient concentrations of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particulate mercury (PBM) during December 2007-November 2009 were 1.6ng/m3, 5.1pg/m3, and 8.9pg/m3, respectively. The median concentrations of GEM, GOM, and PBM significantly decreased by 12%, 73%, and 50% after the CFPP closed (Mann-Whitney test, p<0.001). Positive Matrix Factorization (EPA PMF v4.1) identified six factors including O3-rich, traffic, gas phase oxidation, wood combustion, nucleation, and CFPP. When the CFPP was closed, median concentrations of GEM, GOM, and PBM apportioned to the CFPP factor significantly decreased by 25%, 74%, and 67%, respectively, compared to those measured when the CFPP was still in operation (Mann-Whitney test, p<0.001). Conditional probability function (CPF) analysis showed the greatest reduction in all three Hg species was associated with northwesterly winds pointing toward the CFPP. These changes were clearly attributable to the closure of the CFPP.

2

Mercury Specie and Multi-Pollutant Control  

SciTech Connect

This project was awarded to demonstrate the ability to affect and optimize mercury speciation and multi-pollutant control using non-intrusive advanced sensor and optimization technologies. The intent was to demonstrate plant-wide optimization systems on a large coal fired steam electric power plant in order to minimize emissions, including mercury (Hg), while maximizing efficiency and maintaining saleable byproducts. Advanced solutions utilizing state-of-the-art sensors and neural network-based optimization and control technologies were proposed to maximize the removal of mercury vapor from the boiler flue gas thereby resulting in lower uncontrolled releases of mercury into the atmosphere. Budget Period 1 (Phase I) - Included the installation of sensors, software system design and establishment of the as-found baseline operating metrics for pre-project and post-project data comparison. Budget Period 2 (Phase II) - Software was installed, data communications links from the sensors were verified, and modifications required to integrate the software system to the DCS were performed. Budget Period 3 (Phase III) - Included the validation and demonstration of all control systems and software, and the comparison of the optimized test results with the targets established for the project site. This report represents the final technical report for the project, covering the entire award period and representing the final results compared to project goals. NeuCo shouldered 61% of the total project cost; while DOE shouldered the remaining 39%. The DOE requires repayment of its investment. This repayment will result from commercial sales of the products developed under the project. NRG's Limestone power plant (formerly owned by Texas Genco) contributed the host site, human resources, and engineering support to ensure the project's success.

Rob James; Virgil Joffrion; John McDermott; Steve Piche

2010-05-31T23:59:59.000Z

3

Mercury Specie and Multi-Pollutant Control Project (completed May 31, 2011)  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Specie and Multi-Pollutant Mercury Specie and Multi-Pollutant Control Project (Completed May 31, 2010) Description NeuCo, Inc. (which acquired original participant Pegasus Technologies), a developer of power plant control and optimization technologies, demonstrated the capability to optimize mercury speciation and control of emissions from an existing power plant. This demonstration took place at an 890 megawatt (MW) utility boiler in Jewett,

4

Simultaneous Determination of Mercury and Tin Species in ...  

Science Conference Proceedings (OSTI)

... humans. In some cases, more than 90 % of the total mercury found in edible fish tissue is in the form of methylmercury. ...

2013-03-21T23:59:59.000Z

5

Study of Mercury Transformation with Chlorinated Species under Homogeneous and Heterogeneous Conditions.  

E-Print Network (OSTI)

??Mercury (Hg) transformation under homogeneous (gas-phase oxidation reactions primarily involving chlorine species in flue gases) and heterogeneous (gas-surface oxidation reactions involving surface enhanced Hg oxidation… (more)

Busireddy, Bhargavi

2009-01-01T23:59:59.000Z

6

Impact of supplemental firing of tire-derived fuel (TDF) on mercury species and mercury capture with the advanced hybrid filter in a western subbituminous coal flue gas  

Science Conference Proceedings (OSTI)

Pilot-scale experimental studies were carried out to evaluate the impacts of cofiring tire-derived fuel and a western subbituminous coal on mercury species in flue gas. Mercury samples were collected at the inlet and outlet of the Advanced Hybrid filter to determine mercury concentrations in the flue gas with and without TDF cofiring, respectively. Cofiring of TDF with a subbituminous coal had a significant effect on mercury speciation in the flue gas. With 100% coal firing, there was only 16.8% oxidized mercury in the flue gas compared to 47.7% when 5% TDF (mass basis) was fired and 84.8% when 10% TDF was cofired. The significantly enhanced mercury oxidation may be the result of additional homogeneous gas reactions between Hg{sup 0} and the reactive chlorine generated in the TDF-cofiring flue gas and the in situ improved reactivity of unburned carbon in ash by the reactive chlorine species. Although the cofiring of TDF demonstrated limited improvement on mercury-emission control with the Advanced Hybrid filter, it proved to be a very cost-effective mercury control approach for power plants equipped with wet or dry flue gas desulfurization (FGD) systems because of the enhanced mercury oxidation. 15 refs., 4 figs., 4 tabs.

Ye Zhuang; Stanley J. Miller [University of North Dakota, Grand Forks, ND (United States). Energy & Environmental Research Center

2006-05-15T23:59:59.000Z

7

Temperature-programmed decomposition desorption of mercury species over activated carbon sorbents for mercury removal from coal-derived fuel gas  

Science Conference Proceedings (OSTI)

The mercury (Hg{sup 0}) removal process for coal-derived fuel gas in the integrated gasification combined cycle (IGCC) process will be one of the important issues for the development of a clean and highly efficient coal power generation system. Recently, iron-based sorbents, such as iron oxide (Fe{sub 2}O{sub 3}), supported iron oxides on TiO{sub 2}, and iron sulfides, were proposed as active mercury sorbents. The H{sub 2}S is one of the main impurity compounds in coal-derived fuel gas; therefore, H{sub 2}S injection is not necessary in this system. HCl is also another impurity in coal-derived fuel gas. In this study, the contribution of HCl to the mercury removal from coal-derived fuel gas by a commercial activated carbon (AC) was studied using a temperature-programmed decomposition desorption (TPDD) technique. The TPDD technique was applied to understand the decomposition characteristics of the mercury species on the sorbents. The Hg{sup 0}-removal experiments were carried out in a laboratory-scale fixed-bed reactor at 80-300{sup o}C using simulated fuel gas and a commercial AC, and the TPDD experiments were carried out in a U-tube reactor in an inert carrier gas (He or N{sub 2}) after mercury removal. The following results were obtained from this study: (1) HCl contributed to the mercury removal from the coal-derived fuel gas by the AC. (2) The mercury species captured on the AC in the HCl{sup -} and H{sub 2}S-presence system was more stable than that of the H{sub 2}S-presence system. (3) The stability of the mercury surface species formed on the AC in the H{sub 2}S-absence and HCl-presence system was similar to that of mercury chloride (HgClx) species. 25 refs., 12 figs., 1 tab.

M. Azhar Uddin; Masaki Ozaki; Eiji Sasaoka; Shengji Wu [Okayama University, Okayama (Japan). Faculty of Environmental Science and Technology

2009-09-15T23:59:59.000Z

8

Effect of the shutdown of a large coal-fired power plant on ambient...  

NLE Websites -- All DOE Office Websites (Extended Search)

Effect of the shutdown of a large coal-fired power plant on ambient mercury species Yungang Wang 1 , Jiaoyan Huang 2,a , Philip K. Hopke 3,* , Oliver V. Rattigan 4 , David C....

9

Mercury extraction by the TRUEX process solvent: I. Kinetics, extractable species, dependence on nitric acid concentration and stoichiometry  

SciTech Connect

Mercury extraction from acidic aqueous solutions by the TRUEX process solvent (0.2 M CMPO, 1.4 M TBP in n-dodecane) has not extensively been examined. Research at the Idaho Chemical Processing Plant is currently in progress to evaluate the TRUEX process for actinide removal from several acidic waste streams, including liquid sodium-bearing waste (SBW), which contains significant quantities of mercury. Preliminary experiments were performed involving the extraction of Hg{sup 203}, added as HgCl{sub 2}, from 0.01 to 10 M HNO{sub 3} solutions. Mercury distribution coefficients (D{sub Hg}) range between 3 and 60 from 0.01 M to 2 M HNO{sub 3}. At higher nitric acid concentrations, i.e. 5 M HNO{sub 3} or greater, D{sub Hg} significantly decreases to values less than 1. These results indicate mercury is extracted from acidic solutions {<=}{approximately}2 M HNO{sub 3} and stripped with nitric acid solutions {>=}{approximately}5 M HNO{sub 3}. Experimental results indicate the extractable species is HgCl{sub 2} from nitrate media, i.e., chloride must be present in the nitrate feed to extract mercury. Extractions from Hg(NO{sub 3}){sub 2} solutions indicated substantially reduced distribution ratios, typically D{sub Hg}< 1, for the range of nitric acid concentrations examined (0.01 to 8 M HNO{sub 3}). Extraction of mercury, as HgCl{sub 2}, by the individual components of the TRUEX solvent was also examined from 2 M HNO{sub 3}. The diluent, n-dodecane, does not measurably extract mercury. With a 1.4 M TBP/n-dodecane solvent, D{sub Hg} {approximately}3.4 compared with D{sub Hg} {approximately}7 for the TRUEX solvent. Classical slope analysis techniques were utilized to evaluate the stoichiometric coefficients of Hg extraction independently for both CMPO and TBP.

Herbst, R.S.; Brewer, K.N.; Tranter, T.J.; Todd, T.A.

1995-12-01T23:59:59.000Z

10

RECOVERY OF MERCURY FROM CONTAMINATED LIQUID WASTES  

SciTech Connect

Mercury was widely used in U.S. Department of Energy (DOE) weapons facilities, resulting in a broad range of mercury-contaminated wastes and wastewaters. Some of the mercury contamination has escaped to the local environment, particularly at the Y-12 Plant in Oak Ridge, Tennessee, where approximately 330 metric tons of mercury were discharged to the environment between 1953 and 1963 (TN & Associates, 1998). Effective removal of mercury contamination from water is a complex and difficult problem. In particular, mercury treatment of natural waters is difficult because of the low regulatory standards. For example, the Environmental Protection Agency has established a national ambient water quality standard of 12 parts-per-trillion (ppt), whereas the standard is 1.8 ppt in the Great Lakes Region. In addition, mercury in the environment is typically present in several different forms, but sorption processes are rarely effective with more than one or two of these forms. To meet the low regulatory discharge limits, an effective sorption process must be able to address all forms of mercury present in the water. One approach is to apply different sorbents in series depending on the mercury speciation and the regulatory discharge limits. ADA Technologies, Inc. has developed four new sorbents to address the variety of mercury species present in industrial discharges and natural waters. Three of these sorbents have been field tested on contaminated creek water at the Y-12 Plant. Two of these sorbents have been successfully demonstrated very high removal efficiencies for soluble mercury species, reducing mercury concentrations at the outlet of a pilot-scale system to less than 12 ppt for as long as six months. The other sorbent tested at the Y-12 Plant targeted colloidal mercury not removed by standard sorption or filtration processes. At the Y-12 Plant, colloidal mercury appears to be associated with iron, so a sorbent that removes mercury-iron complexes in the presence of a magnetic field was evaluated. Field results indicated good removal of this mercury fraction from the Y-12 waters. In addition, this sorbent is easily regenerated by simply removing the magnetic field and flushing the columns with water. The fourth sorbent is still undergoing laboratory development, but results to date indicate exceptionally high mercury sorption capacity. The sorbent is capable of removing all forms of mercury typically present in natural and industrial waters, including Hg{sup 2+}, elemental mercury, methyl mercury, and colloidal mercury. The process possesses very fast kinetics, which allows for higher flow rates and smaller treatment units. These sorbent technologies, used in tandem or individually depending on the treatment needs, can provide DOE sites with a cost-effective method for reducing mercury concentrations to very low levels mandated by the regulatory community. In addition, the technologies do not generate significant amounts of secondary wastes for disposal. Furthermore, the need for improved water treatment technologies is not unique to the DOE. The new, stringent requirements on mercury concentrations impact other government agencies as well as the private sector. Some of the private-sector industries needing improved methods for removing mercury from water include mining, chloralkali production, chemical processing, and medical waste treatment. The next logical step is to deploy one or more of these sorbents at a contaminated DOE site or at a commercial facility needing improved mercury treatment technologies. A full-scale deployment is planned in fiscal year 2000.

Robin M. Stewart

1999-09-29T23:59:59.000Z

11

Mercury Calibration System  

Science Conference Proceedings (OSTI)

U.S. Environmental Protection Agency (EPA) Performance Specification 12 in the Clean Air Mercury Rule (CAMR) states that a mercury CEM must be calibrated with National Institute for Standards and Technology (NIST)-traceable standards. In early 2009, a NIST traceable standard for elemental mercury CEM calibration still does not exist. Despite the vacature of CAMR by a Federal appeals court in early 2008, a NIST traceable standard is still needed for whatever regulation is implemented in the future. Thermo Fisher is a major vendor providing complete integrated mercury continuous emissions monitoring (CEM) systems to the industry. WRI is participating with EPA, EPRI, NIST, and Thermo Fisher towards the development of the criteria that will be used in the traceability protocols to be issued by EPA. An initial draft of an elemental mercury calibration traceability protocol was distributed for comment to the participating research groups and vendors on a limited basis in early May 2007. In August 2007, EPA issued an interim traceability protocol for elemental mercury calibrators. Various working drafts of the new interim traceability protocols were distributed in late 2008 and early 2009 to participants in the Mercury Standards Working Committee project. The protocols include sections on qualification and certification. The qualification section describes in general terms tests that must be conducted by the calibrator vendors to demonstrate that their calibration equipment meets the minimum requirements to be established by EPA for use in CAMR monitoring. Variables to be examined include linearity, ambient temperature, back pressure, ambient pressure, line voltage, and effects of shipping. None of the procedures were described in detail in the draft interim documents; however they describe what EPA would like to eventually develop. WRI is providing the data and results to EPA for use in developing revised experimental procedures and realistic acceptance criteria based on actual capabilities of the current calibration technology. As part of the current effort, WRI worked with Thermo Fisher elemental mercury calibrator units to conduct qualification experiments to demonstrate their performance characteristics under a variety of conditions and to demonstrate that they qualify for use in the CEM calibration program. Monitoring of speciated mercury is another concern of this research. The mercury emissions from coal-fired power plants are comprised of both elemental and oxidized mercury. Current CEM analyzers are designed to measure elemental mercury only. Oxidized mercury must first be converted to elemental mercury prior to entering the analyzer inlet in order to be measured. CEM systems must demonstrate the ability to measure both elemental and oxidized mercury. This requires the use of oxidized mercury generators with an efficient conversion of the oxidized mercury to elemental mercury. There are currently two basic types of mercuric chloride (HgCl{sub 2}) generators used for this purpose. One is an evaporative HgCl{sub 2} generator, which produces gas standards of known concentration by vaporization of aqueous HgCl{sub 2} solutions and quantitative mixing with a diluent carrier gas. The other is a device that converts the output from an elemental Hg generator to HgCl{sub 2} by means of a chemical reaction with chlorine gas. The Thermo Fisher oxidizer system involves reaction of elemental mercury vapor with chlorine gas at an elevated temperature. The draft interim protocol for oxidized mercury units involving reaction with chlorine gas requires the vendors to demonstrate high efficiency of oxidation of an elemental mercury stream from an elemental mercury vapor generator. The Thermo Fisher oxidizer unit is designed to operate at the power plant stack at the probe outlet. Following oxidation of elemental mercury from reaction with chlorine gas, a high temperature module reduces the mercuric chloride back to elemental mercury. WRI conducted work with a custom laboratory configured stand-alone oxidized mercury generator unit prov

John Schabron; Eric Kalberer; Joseph Rovani; Mark Sanderson; Ryan Boysen; William Schuster

2009-03-11T23:59:59.000Z

12

MERCURY EMISSIONS FROM A SIMULATED IN-SITU OIL SHALE RETORT  

E-Print Network (OSTI)

M. and Chang, B. , 1974; Mercury Monitor for Ambient Air,E. Poulson INTRODUCTION Mercury emissions from fossil-fuelHarley, R. A. , 1973; Mercury Balance on a Large Pulverized

Fox, J. P.

2012-01-01T23:59:59.000Z

13

Ambient Measurements of the NOx Reservoir Species N2O5 using Cavity Ring-down Spectroscopy  

E-Print Network (OSTI)

The regulated control of pollutants is essential to maintaining good air quality in urban areas. A major concern is the formation of tropospheric ozone, which can be especially harmful to those with lung conditions and has been linked to the occurrence of asthma. Ozone is formed through reactions of oxidized volatile organic compounds with nitrogen oxides, and the accurate modeling of the process is necessary for smart and effective regulations. Ambient measurements are important to understanding the mechanisms involved in tropospheric chemistry. This dissertation describes the characterization of a novel instrument for the ambient measurement of dinitrogen pentoxide, N2O5, and the results of several field studies. This is an important intermediate in the major nighttime loss pathway of nitrogen oxides. The understanding of this process requires correct modeling formation, as any nitrogen oxides not removed at night will result in increased ozone formation at sunrise. Calibration studies have been performed in order to quantify the loss of reactive species within the instrument, and the sampling flow and N2O5 detection have been well characterized. The results of the laboratory measurements are presented. Results are presented from the SHARP Field Study in Houston, TX in the spring of 2009. N2O5 measurements are compared to measurements of other species, including nitric acid and nitryl chloride, which were performed by other research groups. Mixing ratios exceeding 300 ppt were observed following ozone exceedance days, and a dependence of the concentration on both wind speed and direction was noticed. There was a strong correlation determined between N2O5 with HNO3 and ClNO2 indicating both a fast heterogeneous hydrolysis and N2O5 as the primary source of the species. Observed atmospheric lifetimes for N2O5 were short, ranging from several seconds to several minutes. We have also investigated the presence of N2O5 in College Station, TX. Low mixing ratios peaking at approximately 20 ppt were observed, with longer atmospheric lifetimes of up to several hours. The role of biogenic emissions in the NO3-N2O5 equilibrium is discussed.

Geidosch, Justine Nicole

2011-08-01T23:59:59.000Z

14

MRP2 and the handling of mercuric ions in rats exposed acutely to inorganic and organic species of mercury  

Science Conference Proceedings (OSTI)

Mercuric ions accumulate preferentially in renal tubular epithelial cells and bond with intracellular thiols. Certain metal-complexing agents have been shown to promote extraction of mercuric ions via the multidrug resistance-associated protein 2 (MRP2). Following exposure to a non-toxic dose of inorganic mercury (Hg{sup 2+}), in the absence of complexing agents, tubular cells are capable of exporting a small fraction of intracellular Hg{sup 2+} through one or more undetermined mechanisms. We hypothesize that MRP2 plays a role in this export. To test this hypothesis, Wistar (control) and TR{sup -} rats were injected intravenously with a non-nephrotoxic dose of HgCl{sub 2} (0.5 {mu}mol/kg) or CH{sub 3}HgCl (5 mg/kg), containing [{sup 203}Hg], in the presence or absence of cysteine (Cys; 1.25 {mu}mol/kg or 12.5 mg/kg, respectively). Animals were sacrificed 24 h after exposure to mercury and the content of [{sup 203}Hg] in blood, kidneys, liver, urine and feces was determined. In addition, uptake of Cys-S-conjugates of Hg{sup 2+} and methylmercury (CH{sub 3}Hg{sup +}) was measured in inside-out membrane vesicles prepared from either control Sf9 cells or Sf9 cells transfected with human MRP2. The amount of mercury in the total renal mass and liver was significantly greater in TR{sup -} rats than in controls. In contrast, the amount of mercury in urine and feces was significantly lower in TR{sup -} rats than in controls. Data from membrane vesicles indicate that Cys-S-conjugates of Hg{sup 2+} and CH{sub 3}Hg{sup +} are transportable substrates of MRP2. Collectively, these data indicate that MRP2 plays a role in the physiological handling and elimination of mercuric ions from the kidney.

Bridges, Christy C., E-mail: Bridges_cc@mercer.edu; Joshee, Lucy; Zalups, Rudolfs K.

2011-02-15T23:59:59.000Z

15

The current state of the science related to the re-release of mercury from coal combustion products  

Science Conference Proceedings (OSTI)

The stability of mercury associated with CCPs is an issue that has only recently been under investigation but has become a prominent question as the industry strives to determine if current management options for CCPs will need to be modified. Mercury and other air toxic elements can be present in fly ash, FGD material and bottom ash and boiler slag. Mercury concentrations ranging from {lt} 0.01 to 2.41 ppm in fly ash and from 0.001 to 0.342 ppm in bottom ash have been reported. Stability of mercury must be evaluated by tests that include 1) direct leachability; 2) vapor-phase release at ambient and elevated temperatures; and 3) microbiologically induced leachability and vapor-phase release. The amount of mercury leached from currently produced CCPs is extremely low and does not appear to represent an environmental or re-release hazard. Concentrations of mercury in leachates from fly ashes and FGD material using either the toxicity characteristic leaching procedure (TCLP) or the synthetic groundwater leaching procedure (SGLP) are generally below detection limits. The release of mercury vapor from CCPs resulting from the use of mercury control technologies has been evaluated on a limited basis. Research indicates that mercury bound to the ash or activated carbon is fairly stable. The EERC found that organomercury species were detected at very low levels both in the vapor and leachate generated from the microbiologically mediated release experiments. The current state of the science indicates that mercury associated with CCPs is stable and highly unlikely to be released under most management conditions, including utilisation and disposal. The exception to this is exposure to high temperatures such as those that may be achieved in cement and wallboard production. Therefore, existing CCPs management options are expected to be environmentally sound options for CCPs from systems with mercury control technologies installed. 2 refs., 2 photos.

Debra F. Pflughoeft-Hassett; David J. Hassett; Loreal V. Heebink; Tera D. Buckley [University of North Dakota Energy and Environmental Research Center (EERC) (United States)

2006-07-01T23:59:59.000Z

16

Publications | Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

A. Afsahi, and R. Ross, Mercury: Enabling Remote Procedure Call for High-Performance Computing, IEEE International Conference on Cluster Computing, Sep 2013. DOIslides...

17

Mercury concentrations in Maine sport fishes  

Science Conference Proceedings (OSTI)

To assess mercury contamination of fish in Maine, fish were collected from 120 randomly selected lakes. The collection goal for each lake was five fish of the single most common sport fish species within the size range commonly harvested by anglers. Skinless, boneless fillets of fish from each lake were composited, homogenized, and analyzed for total mercury. The two most abundant species, brook trout Salvelinus fontinalis and smallmouth bass Micropterus dolomieu, were also analyzed individually. The composite fish analyses indicate high concentrations of mercury, particularly in large and long-lived nonsalmonid species. Chain pickerel Esox niger, smallmouth bass, largemouth bass Micropterus salmoides, and white perch Morone americana had the highest average mercury concentrations, and brook trout and yellow perch Perca flavescens had the lowest. The mean species composite mercury concentration was positively correlated with a factor incorporating the average size and age of the fish. Lakes containing fish with high mercury concentrations were not clustered near known industrial or population centers but were commonest in the area within 150 km of the seacoast, reflecting the geographical distribution of species that contained higher mercury concentrations. Stocked and wild brook trout were not different in length or weight, but wild fish were older and had higher mercury concentrations. Fish populations maintained by frequent introductions of hatchery-produced fish and subject to high angler exploitation rates may consist of younger fish with lower exposure to environmental mercury and thus contain lower concentrations than wild populations.

Stafford, C.P. [Univ. of Maine, Orono, ME (United States); Haines, T.A. [Geological Survey, Orono, ME (United States)

1997-01-01T23:59:59.000Z

18

New Mercury Control Technology for the Ft. Dix Waste-to-Energy Plant Sid Nelson Jr.  

E-Print Network (OSTI)

temperature. Mercury chloride (HgCI2) tends to be found in incinerator flue gases and this species may be well mercury measurement with no interference from acidic gases, such as S02. Low-Temperature Sorbents After of the oxidized mercury species, such as mercury chloride. Then, the large surface area in the baghouse would

Columbia University

19

Method for high temperature mercury capture from gas streams  

DOE Patents (OSTI)

A process to facilitate mercury extraction from high temperature flue/fuel gas via the use of metal sorbents which capture mercury at ambient and high temperatures. The spent sorbents can be regenerated after exposure to mercury. The metal sorbents can be used as pure metals (or combinations of metals) or dispersed on an inert support to increase surface area per gram of metal sorbent. Iridium and ruthenium are effective for mercury removal from flue and smelter gases. Palladium and platinum are effective for mercury removal from fuel gas (syngas). An iridium-platinum alloy is suitable for metal capture in many industrial effluent gas streams including highly corrosive gas streams.

Granite, E.J.; Pennline, H.W.

2006-04-25T23:59:59.000Z

20

Mercury Vapor Pressure Correlation  

Science Conference Proceedings (OSTI)

An apparent difference between the historical mercury vapor concentration equations used by the mercury atmospheric measurement community ...

2012-10-09T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Fate of Mercury in Wet FGD Systems  

Science Conference Proceedings (OSTI)

This report describes the results of a bench-scale, laboratory investigation of the fate of flue gas mercury species in wet flue gas desulfurization (FGD) scrubbers that are used for sulfur dioxide (SO2) control in coal-fired power plants. Data collected in the EPA mercury Information Collection Request (ICR), and in research projects sponsored by EPRI show that most wet scrubbers used for SO2 control achieve high removals of oxidized mercury and little or no elemental mercury removal. However, some scru...

2004-03-12T23:59:59.000Z

22

Removal of mercury from coal via a microbial pretreatment process  

Science Conference Proceedings (OSTI)

A process for the removal of mercury from coal prior to combustion is disclosed. The process is based on use of microorganisms to oxidize iron, sulfur and other species binding mercury within the coal, followed by volatilization of mercury by the microorganisms. The microorganisms are from a class of iron and/or sulfur oxidizing bacteria. The process involves contacting coal with the bacteria in a batch or continuous manner. The mercury is first solubilized from the coal, followed by microbial reduction to elemental mercury, which is stripped off by sparging gas and captured by a mercury recovery unit, giving mercury-free coal. The mercury can be recovered in pure form from the sorbents via additional processing.

Borole, Abhijeet P. (Knoxville, TN); Hamilton, Choo Y. (Knoxville, TN)

2011-08-16T23:59:59.000Z

23

Glossary Term - Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Liquid Nitrogen Previous Term (Liquid Nitrogen) Glossary Main Index Next Term (Mole) Mole Mercury Mercury as seen by the Mariner 10 spacecraft on March 24, 1974. Mercury is the...

24

Mercury contamination extraction  

DOE Patents (OSTI)

Mercury is removed from contaminated waste by firstly applying a sulfur reagent to the waste. Mercury in the waste is then permitted to migrate to the reagent and is stabilized in a mercury sulfide compound. The stable compound may then be removed from the waste which itself remains in situ following mercury removal therefrom.

Fuhrmann, Mark (Silver Spring, MD); Heiser, John (Bayport, NY); Kalb, Paul (Wading River, NY)

2009-09-15T23:59:59.000Z

25

Mercury emission behavior during isolated coal particle combustion  

E-Print Network (OSTI)

Of all the trace elements emitted during coal combustion, mercury is most problematic. Mercury from the atmosphere enters into oceanic and terrestrial waters. Part of the inorganic Hg in water is converted into organic Hg (CH3Hg), which is toxic and bioaccumulates in human and animal tissue. The largest source of human-caused mercury air emissions in the U.S is from combustion coal, a dominant fuel used for power generation. The Hg emitted from plants primarily occurs in two forms: elemental Hg and oxidized Hg (Hg2+). The coal chlorine content and ash composition, gas temperature, residence time and presence of different gases will decide the speciation of Hg into Hg0 and Hg2+. For Wyoming coal the concentrations of mercury and chlorine in coal are 120ppb and 140ppb. In order to understand the basic process of formulation of HgCl2 and Hg0 a numerical model is developed in the current work to simulate in the detail i) heating ii) transient pyrolysis of coal and evolution of mercury and chlorine, iii) gas phase oxidation iv) reaction chemistry of Hg and v) heterogeneous oxidation of carbon during isolated coal particle combustion. The model assumes that mercury and chlorine are released as a part of volatiles in the form of elemental mercury and HCl. Homogenous reaction are implemented for the oxidation of mercury. Heterogeneous Hg reactions are ignored. The model investigates the effect of different parameters on the extent of mercury oxidation; particle size, ambient temperature, volatile matter, blending coal with high chlorine coal and feedlot biomass etc,. Mercury oxidation is increased when the coal is blended with feedlot biomass and high chlorine coal and Hg % conversion to HgCl2 increased from 10% to 90% when 20% FB is blended with coal. The ambient temperature has a negative effect on mercury oxidation, an increase in ambient temperature resulted in a decrease in the mercury oxidation. The percentage of oxidized mercury increases from 9% to 50% when the chlorine concentration is increased from 100ppm to 1000ppm. When the temperature is decreased from 1950 K to 950 K, the percentage of mercury oxidized increased from 3% to 27%.

Puchakayala, Madhu Babu

2006-12-01T23:59:59.000Z

26

Atomic Data for Mercury (Hg)  

Science Conference Proceedings (OSTI)

... Mercury (Hg) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Atomic Data for Mercury (Hg). ...

27

Strong Lines of Mercury ( Hg )  

Science Conference Proceedings (OSTI)

... Mercury (Hg) Homepage - Introduction Finding list Select element by name. Select element by atomic number. ... Strong Lines of Mercury ( Hg ). ...

28

2009 Update on Mercury Capture by Wet Flue Gas Desulfurization  

Science Conference Proceedings (OSTI)

This technical update presents results of four research and development projects focused on understanding and enhancing mercury emissions control associated with wet flue gas desulfurization (FGD) technology. The first project was directed at characterizing partitioning of elemental and oxidized mercury species in solid, liquid, and gas phases within process streams involved in an operating commercial system. The second project explored dewatering options with an objective of producing low-mercury-conten...

2009-12-15T23:59:59.000Z

29

Mercury and Fish  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury and Fish Mercury and Fish Name: donna Location: N/A Country: N/A Date: N/A Question: how does mercury get into fish in rivers. what is the ecological process involved which could produce toxic levels of mercury in fish and eventually get into humans? Replies: Hi Donna! Nowadays mercury or its compounds are used at a high scale in many industries as the manufacture of chemicals, paints, household itens, pesticides and fungicides. These products can contaminate humans (and mamals) by direct contact, ingestion or inhalation. Besides the air can become contaminated also, and since mercury compounds produce harmful effects in body tissues and functions, that pollution is very dangerous. Now for your question: Efluent wastes containing mercury in various forms sometimes are dropped in sea water or in rivers or lakes. There the mercury may be converted by bacteria, that are in the muddy sediments, into organic mercurial compounds particularly the highly toxic alkyl mercurials ( methyl and di-methyl mercury), which may in turn be concentrated by the fishes and other aquatic forms of life that are used as food by men. The fishes dont seem to be affected but they are able to concentrate mercury in high poisoning levels, and if human beings, mamals or birds eat these containing mercury fishes, algae, crabs or oysters they will be contaminated and poisoned.

30

Phytoremediation of Ionic and Methyl Mercury P  

DOE Green Energy (OSTI)

Our long-term goal is to enable highly productive plant species to extract, resist, detoxify, and/or sequester toxic heavy metal pollutants as an environmentally friendly alternative to physical remediation methods. We have focused this phytoremediation research on soil and water-borne ionic and methylmercury. Mercury pollution is a serious world-wide problem affecting the health of human and wild-life populations. Methylmercury, produced by native bacteria at mercury-contaminated wetland sites, is a particularly serious problem due to its extreme toxicity and efficient biomagnification in the food chain. We engineered several plant species (e.g., Arabidopsis, tobacco, canola, yellow poplar, rice) to express the bacterial genes, merB and/or merA, under the control of plant regulatory sequences. These transgenic plants acquired remarkable properties for mercury remediation. (1) Transgenic plants expressing merB (organomercury lyase) extract methylmercury from their growth substrate and degrade it to less toxic ionic mercury. They grow on concentrations of methylmercury that kill normal plants and accumulate low levels of ionic mercury. (2) Transgenic plants expressing merA (mercuric ion reductase) extract and electrochemically reduce toxic, reactive ionic mercury to much less toxic and volatile metallic mercury. This metal transformation is driven by the powerful photosynthetic reducing capacity of higher plants that generates excess NADPH using solar energy. MerA plants grow vigorously on levels of ionic mercury that kill control plants. Plants expressing both merB and merA degrade high levels of methylmercury and volatilize metallic mercury. These properties were shown to be genetically stable for several generations in the two plant species examined. Our work demonstrates that native trees, shrubs, and grasses can be engineered to remediate the most abundant toxic mercury pollutants. Building on these data our working hypothesis for the next grant period is that transgenic plants expressing the bacterial merB and merA genes will (a) remove mercury from polluted soil and water and (b) prevent methylmercury from entering the food chain. Our specific aims center on understanding the mechanisms by which plants process the various forms of mercury and volatilize or transpire mercury vapor. This information will allow us to improve the design of our current phytoremediation strategies. As an alternative to volatilizing mercury, we are using several new genes to construct plants that will hyperaccumulate mercury in above-ground tissues for later harvest. The Department of Energy's Oak Ridge National Laboratory and Brookhaven National Laboratory have sites with significant levels of mercury contamination that could be cleaned by applying the scientific discoveries and new phytoremediation technologies described in this proposal. The knowledge and expertise gained by engineering plants to hyperaccumulate mercury can be applied to the remediation of other heavy metals pollutants (e.g., arsenic, cesium, cadmium, chromium, lead, strontium, technetium, uranium) found at several DOE facilities.

Meagher, Richard B.

1999-06-01T23:59:59.000Z

31

Atmospheric Mercury Deposition during the Last 270 Years: A  

E-Print Network (OSTI)

that were placed in an oven at 50 °C overnight to ensure complete oxidation of all mercury species. Analysis requiring pollutant scrubbers that also likely remove a fraction of the Hg in flue gases. If so, the resultsAtmospheric Mercury Deposition during the Last 270 Years: A Glacial Ice Core Record of Natural

32

Second order ambient intelligence  

Science Conference Proceedings (OSTI)

This text attempts to describe an imagined future of ambient intelligence. It assumes that one day most of the current issues within ambient intelligence will be solved and that a second order ambient intelligence will be formulated, one with new research ... Keywords: Critique of ambient intelligence, adaptive systems, animal machine interaction, critical futurism, long-term behavior, second order ambient intelligence, temporal design

Marc Böhlen

2009-01-01T23:59:59.000Z

33

Mercury's Protoplanetary Mass  

E-Print Network (OSTI)

Major element fractionation among chondrites has been discussed for decades as ratios relative to Si or Mg. Recently, by expressing ratios relative to Fe, I discovered a new relationship admitting the possibility that ordinary chondrite meteorites are derived from two components, a relatively oxidized and undifferentiated, primitive component and a somewhat differentiated, planetary component, with oxidation state like the highly reduced enstatite chondrites, which I suggested was identical to Mercury's complement of lost elements. Here, on the basis of that relationship, I derive expressions, as a function of the mass of planet Mercury and the mass of its core, to estimate the mass of Mercury's lost elements, the mass of Mercury's alloy and rock protoplanetary core, and the mass of Mercury's gaseous protoplanet. Although Mercury's mass is well known, its core mass is not, being widely believed to be in the range of 70-80 percent of the planet mass. For a core mass of 75 percent, the mass of Mercury's lost elements is about 1.32 times the mass of Mercury, the mass of the alloy and rock protoplanetary core is about 2.32 times the mass of Mercury, and the mass of the gaseous protoplanet of Mercury is about 700 times the mass of Mercury. Circumstantial evidence is presented in support of the supposition that Mercury's lost elements is identical to the planetary component of ordinary chondrite formation.

J. Marvin Herndon

2004-10-01T23:59:59.000Z

34

Mercury in the Environment  

Science Conference Proceedings (OSTI)

EPRI periodically issues updates on critical research on environmental mercury, discussing scientific findings of crucial interest for a complete understanding of mercury sources, transport, fate, cycling, human exposure, and health effects. This document is part of that EPRI series, focusing on several critical reviews of mercury sources and impacts.

2007-03-30T23:59:59.000Z

35

Watershed Mercury Loading Framework  

Science Conference Proceedings (OSTI)

This report explains and illustrates a simplified stochastic framework, the Watershed Mercury Loading Framework, for organizing and framing site-specific knowledge and information on mercury loading to waterbodies. The framework permits explicit treatment of data uncertainties. This report will be useful to EPRI members, state and federal regulatory agencies, and watershed stakeholders concerned with mercury-related human and ecological health risk.

2003-05-23T23:59:59.000Z

36

Mercury Absorption in Aqueous Oxidants Catalyzed by Mercury(II) Lynn L. Zhao and Gary T. Rochelle*  

E-Print Network (OSTI)

combustion may cause the oxidation of mercury, and chloride mercury #12;13 13 species may be the major form combustion and gasification flue gases, Environ. Sci. Technol. 30 (1996) 2421-2426. [23] S.B. Ghorishi, C Ms. Ref. No.: HAZMAT-D-07-00176 Accepted manuscript #12;2 2 Abstract Municipal solid waste (MSW) flue

Rochelle, Gary T.

37

Implications of mercury interactions with band-gap semiconductor oxides  

SciTech Connect

Titanium dioxide is a well-known photooxidation catalyst. It will oxidize mercury in the presence of ultraviolet light from the sun and oxygen and/or moisture to form mercuric oxide. Several companies manufacture self-cleaning windows. These windows have a transparent coating of titanium dioxide. The titanium dioxide is capable of destroying organic contaminants in air in the presence of ultraviolet light from the sun, thereby keeping the windows clean. The commercially available self-cleaning windows were used to sequester mercury from oxygen–nitrogen mixtures. Samples of the self-cleaning glass were placed into specially designed photo-reactors in order to study the removal of elemental mercury from oxygen–nitrogen mixtures resembling air. The possibility of removing mercury from ambient air with a self-cleaning glass apparatus is examined. The intensity of 365-nm ultraviolet light was similar to the natural intensity from sunlight in the Pittsburgh region. Passive removal of mercury from the air may represent an option in lieu of, or in addition to, point source clean-up at combustion facilities. There are several common band-gap semiconductor oxide photocatalysts. Sunlight (both the ultraviolet and visible light components) and band-gap semiconductor particles may have a small impact on the global cycle of mercury in the environment. The potential environmental consequences of mercury interactions with band-gap semiconductor oxides are discussed. Heterogeneous photooxidation might impact the global transport of elemental mercury emanating from flue gases.

Granite, E.J.; King, W.P.; Stanko, D.C.; Pennline, H.W.

2008-09-01T23:59:59.000Z

38

Oxidation and methylation of dissolved elemental mercury by anaerobic bacteria  

Science Conference Proceedings (OSTI)

Methylmercury is a neurotoxin that poses significant health risks to humans. Some anaerobic sulphate- and iron-reducing bacteria can methylate oxidized forms of mercury, generating methylmercury1-4. One strain of sulphate-reducing bacteria (Desulfovibrio desulfuricans ND132) can also methylate elemental mercury5. The prevalence of this trait among different bacterial strains and species remains unclear, however. Here, we compare the ability of two strains of the sulphate-reducing bacterium Desulfovibrio and one strain of the iron-reducing bacterium Geobacter to oxidise and methylate elemental mercury in a series of laboratory incubations. Experiments were carried out under dark, anaerobic conditions, in the presence of environmentally-relevant concentrations of elemental mercury. We report differences in the ability of these organisms to oxidise and methylate elemental mercury. In line with recent findings5, we show that Desulfovibrio desulfuricans ND132 can both oxidise and methylate elemental mercury. However, the rate of methylation of elemental mercury is only about one third the rate of methylation of oxidized mercury. We also show that Desulfovibrio alaskensis G20 can oxidise, but not methylate, elemental mercury. Geobacter sulfurreducens PCA is able to oxidise and methylate elemental mercury in the presence of cysteine. We suggest that the activity of methylating and non-methylating bacteria may together enhance the formation of methylmercury in anaerobic environments.

Hu, Haiyan [ORNL] [ORNL; Lin, Hui [ORNL] [ORNL; Zheng, Wang [ORNL] [ORNL; Tomanicek, Stephen J [ORNL] [ORNL; Johs, Alexander [ORNL] [ORNL; Feng, Xinbin [ORNL] [ORNL; Elias, Dwayne A [ORNL] [ORNL; Liang, Liyuan [ORNL] [ORNL; Liang, Liyuan [ORNL] [ORNL; Gu, Baohua [ORNL] [ORNL

2013-01-01T23:59:59.000Z

39

Mercury Speciation in Piscivorous Fish from Mining-impacted Reservoirs  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Speciation in Piscivorous Mercury Speciation in Piscivorous Fish from Mining-impacted Reservoirs Mercury toxicity generates environmental concerns in diverse aquatic systems because methylmercury enters the water column in diverse ways then biomagnifies through food webs. At the apex of many freshwater food webs, piscivorous fish can then extend that trophic transfer and potential for neurotoxicity to wildlife and humans. Mining activities, particularly those associated with the San Francisco Bay region, can generate both point and non-point mercury sources. Replicate XANES analyses on largemouth bass and hybrid striped bass from Guadalupe Reservoir (GUA), California and Lahontan Reservoir (LAH), Nevada, were performed to determine predominant chemical species of mercury accumulated by high-trophic-level piscivores that are exposed to elevated mercury in both solution and particulate phases in the water column.

40

Stabilization of Mercury in High pH Tank Sludges  

Science Conference Proceedings (OSTI)

DOE complex contains many tank sludges contaminated with mercury. The high pH of these tank sludges typically fails to stabilize the mercury, resulting in these radioactive wastes also being characteristically hazardous or mixed waste. The traditional treatment for soluble inorganic mercury species is precipitation as insoluble mercuric sulfide. Sulfide treatment and a commercial mercury-stabilizing product were tested on surrogate sludges at various alkaline pH values. Neither the sulfide nor the commercial product stabilized the mercury sufficiently at the high pH of the tank sludges to pass the Toxicity Characteristic Leach Procedure (TCLP) treatment standards of the Resource Conservation and Recovery Act (RCRA). The commercial product also failed to stabilize the mercury in samples of the actual tank sludges.

Spence, R.; Barton, J.

2003-02-24T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Assessment of mercury in the Savannah River Site environment  

SciTech Connect

Mercury has been valued by humans for several millennia. Its principal ore, cinnabar, was mined for its distinctive reddish-gold color and high density. Mercury and its salts were used as medicines and aphrodisiacs. At SRS, mercury originated from one of the following: as a processing aid in aluminum dissolution and chloride precipitation; as part of the tritium facilities` gas handling system; from experimental, laboratory, or process support facilities; and as a waste from site operations. Mercury is also found in Par Pond and some SRS streams as the result of discharges from a mercury-cell-type chlor-alkali plant near the city of Augusta, GA. Reactor cooling water, drawn from the Savannah River, transported mercury onto the SRS. Approximately 80,000 kg of mercury is contained in the high level waste tanks and 10,000 kg is located in the SWDF. Additional quantities are located in the various seepage basins. In 1992, 617 wells were monitored for mercury contamination, with 47 indicating contamination in excess of the 0.002-ppm EPA Primary Drinking Water Standard. More than 20 Savannah River Ecology Laboratory (SREL) reports and publications pertinent to mercury (Hg) have been generated during the last two decades. They are divided into three groupings: SRS-specific studies, basic studies of bioaccumulation, and basic studies of effect. Many studies have taken place at Par Pond and Upper Three Runs Creek. Mercury has been detected in wells monitoring the groundwater beneath SRS, but not in water supply wells in excess of the Primary Drinking Water Limit of 0.002 ppm. There has been no significant release of mercury from SRS to the Savannah River. While releases to air are likely, based on process knowledge, modeling of the releases indicates concentrations that are well below the SCDHEC ambient standard.

Kvartek, E.J.; Carlton, W.H.; Denham, M.; Eldridge, L.; Newman, M.C.

1994-09-01T23:59:59.000Z

42

Catalysts for Oxidation of Mercury in Flue Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

Catalysts for Oxidation of Mercury in Flue Gas Catalysts for Oxidation of Mercury in Flue Gas Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking licensing partners interested in implementing United States Patent Number 7,776,780 entitled "Catalysts for Oxidation of Mercury in Flue Gas." Disclosed in this patent are catalysts for the oxidation of elemental mercury in flue gas. These novel catalysts include iridium (Ir), platinum/iridium (Pt/Ir), and Thief carbons. The catalyst materials will adsorb the oxidizing agents HCl, Cl 2 , and other halogen species in the flue gas stream that are produced when fuel is combusted. These adsorbed oxidizing agents can then react with elemental mercury in the stream, which is difficult to capture, and oxidize it to form Hg (II) species,

43

Strategies for the Engineered Phytoremediation of Mercury and Arsenic Pollution  

Science Conference Proceedings (OSTI)

Phytoremediation is the use of plants to extract, transport, detoxify and/or sequester pollutants of the land, water or air. Mercury and arsenic are among the worst environmental pollutants, adversely affecting the health of hundreds of millions of people worldwide. We have demonstrated that plants can be engineered to take up and tolerate several times the levels of mercury and arsenic that would kill most plant species. Starting with methylmercury and/or ionic mercury contamination, mercury is detoxified, stored below or above ground, and even volatilized as part of the transpiration process and keeping it out of the food chain. Initial efforts with arsenate demonstrate that it can be taken up, transported aboveground, electrochemically reduced to arsenite in leaves and sequestered in thiol-rich peptide complexes. The transgenic mercury remediation strategies also worked in cultivated and wild plant species like canola, rice and cottonwood.

Dhankher, Om Parkash; Meagher, Richard B.

2003-03-26T23:59:59.000Z

44

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

Science Conference Proceedings (OSTI)

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley Region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley Region.

Kevin Crist

2003-10-02T23:59:59.000Z

45

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

Science Conference Proceedings (OSTI)

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2005-04-02T23:59:59.000Z

46

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

Science Conference Proceedings (OSTI)

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2004-10-02T23:59:59.000Z

47

Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic from Coal-Based Power Plants in the Ohio River Valley Region  

Science Conference Proceedings (OSTI)

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately of 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg0, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2005-10-02T23:59:59.000Z

48

Evaluation of the Emission, Transport, and Deposition of Mercury and Fine Particulate Matter from Coal-Based Power Plants in the Ohio River Valley Region  

Science Conference Proceedings (OSTI)

As stated in the proposal: Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, evaluated the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury and associated fine particulate matter. This evaluation involved two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring included the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station contains sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO2, O3, etc.). Laboratory analyses of time-integrated samples were used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Nearreal- time measurements were used to measure the ambient concentrations of PM mass and all gaseous species including Hg0 and RGM. Approximately 30 months of field data were collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data provides mercury, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis includes (1) development of updated inventories of mercury emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg0, RGM, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This is accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results were compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory’s monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by the USEPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions provides critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2008-12-31T23:59:59.000Z

49

EVALUATION OF THE EMISSION, TRANSPORT, AND DEPOSITION OF MERCURY, FINE PARTICULATE MATTER, AND ARSENIC FROM COAL-BASED POWER PLANTS IN THE OHIO RIVER VALLEY REGION  

Science Conference Proceedings (OSTI)

Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc. (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NOx, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg{sup 0} and RGM. Approximately 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal-fired power plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley Region, operated independently of this project. These sites may include (1) the DOE National Energy Technology Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by U.S. EPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2004-04-02T23:59:59.000Z

50

Evaluation of the Emission, Transport, and Deposition of Mercury, Fine Particulate Matter, and Arsenic from Coal-Based Power Plants in the Ohio River Valley Region  

Science Conference Proceedings (OSTI)

As stated in the proposal: Ohio University, in collaboration with CONSOL Energy, Advanced Technology Systems, Inc (ATS) and Atmospheric and Environmental Research, Inc. (AER) as subcontractors, is evaluating the impact of emissions from coal-fired power plants in the Ohio River Valley region as they relate to the transport and deposition of mercury, arsenic, and associated fine particulate matter. This evaluation will involve two interrelated areas of effort: ambient air monitoring and regional-scale modeling analysis. The scope of work for the ambient air monitoring will include the deployment of a surface air monitoring (SAM) station in southeastern Ohio. The SAM station will contain sampling equipment to collect and measure mercury (including speciated forms of mercury and wet and dry deposited mercury), arsenic, particulate matter (PM) mass, PM composition, and gaseous criteria pollutants (CO, NO{sub x}, SO{sub 2}, O{sub 3}, etc.). Laboratory analysis of time-integrated samples will be used to obtain chemical speciation of ambient PM composition and mercury in precipitation. Near-real-time measurements will be used to measure the ambient concentrations of PM mass and all gaseous species including Hg0 and RGM. Approximately 18 months of field data will be collected at the SAM site to validate the proposed regional model simulations for episodic and seasonal model runs. The ambient air quality data will also provide mercury, arsenic, and fine particulate matter data that can be used by Ohio Valley industries to assess performance on multi-pollutant control systems. The scope of work for the modeling analysis will include (1) development of updated inventories of mercury and arsenic emissions from coal plants and other important sources in the modeled domain; (2) adapting an existing 3-D atmospheric chemical transport model to incorporate recent advancements in the understanding of mercury transformations in the atmosphere; (3) analyses of the flux of Hg{sup 0}, RGM, arsenic, and fine particulate matter in the different sectors of the study region to identify key transport mechanisms; (4) comparison of cross correlations between species from the model results to observations in order to evaluate characteristics of specific air masses associated with long-range transport from a specified source region; and (5) evaluation of the sensitivity of these correlations to emissions from regions along the transport path. This will be accomplished by multiple model runs with emissions simulations switched on and off from the various source regions. To the greatest extent possible, model results will also be compared to field data collected at other air monitoring sites in the Ohio Valley region, operated independently of this project. These sites may include (1) the DOE National Energy Technologies Laboratory's monitoring site at its suburban Pittsburgh, PA facility; (2) sites in Pittsburgh (Lawrenceville) PA and Holbrook, PA operated by ATS; (3) sites in Steubenville, OH and Pittsburgh, PA operated by the USEPA and/or its contractors; and (4) sites operated by State or local air regulatory agencies. Field verification of model results and predictions will provide critical information for the development of cost effective air pollution control strategies by the coal-fired power plants in the Ohio River Valley region.

Kevin Crist

2006-04-02T23:59:59.000Z

51

Process for low mercury coal  

DOE Patents (OSTI)

A process is described for producing low mercury coal during precombustion procedures by releasing mercury through discriminating mild heating that minimizes other burdensome constituents. Said mercury is recovered from the overhead gases by selective removal. 4 figures.

Merriam, N.W.; Grimes, R.W.; Tweed, R.E.

1995-04-04T23:59:59.000Z

52

Mercury Detection with Gold Nanoparticles  

E-Print Network (OSTI)

R. J. Warmack, “Detection of mercury vapor using resonatingA surface acoustic wave mercury vapor sensor,” Ieee Trans.N. E. Selin, “Integrating mercury science and policy in the

Crosby, Jeffrey

2013-01-01T23:59:59.000Z

53

Process for low mercury coal  

SciTech Connect

A process for producing low mercury coal during precombustion procedures by releasing mercury through discriminating mild heating that minimizes other burdensome constituents. Said mercury is recovered from the overhead gases by selective removal.

Merriam, Norman W. (Laramie, WY); Grimes, R. William (Laramie, WY); Tweed, Robert E. (Laramie, WY)

1995-01-01T23:59:59.000Z

54

Atmospheric Mercury Research Update  

Science Conference Proceedings (OSTI)

This report is a summary and analysis of research findings on utility and environmental mercury from 1997 to 2003. The update categorizes and describes recent work on mercury in utility-burned coal and its route through power plants, the measures for its control, and its fate in the environment following emissions from utility stacks. This fate includes atmospheric chemistry and transport, deposition to land and water surfaces, aquatic cycling, the dynamics of mercury in freshwater fish food webs, and th...

2004-03-30T23:59:59.000Z

55

Analysis of Halogen-Mercury Reactions in Flue Gas  

SciTech Connect

Oxidized mercury species may be formed in combustion systems through gas-phase reactions between elemental mercury and halogens, such as chorine or bromine. This study examines how bromine species affect mercury oxidation in the gas phase and examines the effects of mixtures of bromine and chlorine on extents of oxidation. Experiments were conducted in a bench-scale, laminar flow, methane-fired (300 W), quartz-lined reactor in which gas composition (HCl, HBr, NO{sub x}, SO{sub 2}) and temperature profile were varied. In the experiments, the post-combustion gases were quenched from flame temperatures to about 350 C, and then speciated mercury was measured using a wet conditioning system and continuous emissions monitor (CEM). Supporting kinetic calculations were performed and compared with measured levels of oxidation. A significant portion of this report is devoted to sample conditioning as part of the mercury analysis system. In combustion systems with significant amounts of Br{sub 2} in the flue gas, the impinger solutions used to speciate mercury may be biased and care must be taken in interpreting mercury oxidation results. The stannous chloride solution used in the CEM conditioning system to convert all mercury to total mercury did not provide complete conversion of oxidized mercury to elemental, when bromine was added to the combustion system, resulting in a low bias for the total mercury measurement. The use of a hydroxylamine hydrochloride and sodium hydroxide solution instead of stannous chloride showed a significant improvement in the measurement of total mercury. Bromine was shown to be much more effective in the post-flame, homogeneous oxidation of mercury than chlorine, on an equivalent molar basis. Addition of NO to the flame (up to 400 ppmv) had no impact on mercury oxidation by chlorine or bromine. Addition of SO{sub 2} had no effect on mercury oxidation by chlorine at SO{sub 2} concentrations below about 400 ppmv; some increase in mercury oxidation was observed at SO{sub 2} concentrations of 400 ppmv and higher. In contrast, SO{sub 2} concentrations as low as 50 ppmv significantly reduced mercury oxidation by bromine, this reduction could be due to both gas and liquid phase interactions between SO{sub 2} and oxidized mercury species. The simultaneous presence of chlorine and bromine in the flue gas resulted in a slight increase in mercury oxidation above that obtained with bromine alone, the extent of the observed increase is proportional to the chlorine concentration. The results of this study can be used to understand the relative importance of gas-phase mercury oxidation by bromine and chlorine in combustion systems. Two temperature profiles were tested: a low quench (210 K/s) and a high quench (440 K/s). For chlorine the effects of quench rate were slight and hard to characterize with confidence. Oxidation with bromine proved sensitive to quench rate with significantly more oxidation at the lower rate. The data generated in this program are the first homogeneous laboratory-scale data on bromine-induced oxidation of mercury in a combustion system. Five Hg-Cl and three Hg-Br mechanisms, some published and others under development, were evaluated and compared to the new data. The Hg-halogen mechanisms were combined with submechanisms from Reaction Engineering International for NO{sub x}, SO{sub x}, and hydrocarbons. The homogeneous kinetics under-predicted the levels of mercury oxidation observed in full-scale systems. This shortcoming can be corrected by including heterogeneous kinetics in the model calculations.

Paula Buitrago; Geoffrey Silcox; Constance Senior; Brydger Van Otten

2010-01-01T23:59:59.000Z

56

Mercury Thermometer Alternatives Training  

Science Conference Proceedings (OSTI)

... tutorials are designed for educating various industrial user groups about the upcoming and current changes that ban the use of mercury products. ...

2013-06-04T23:59:59.000Z

57

MERCURY & DIMETHYLMERCURY EXPOSURE & EFFECTS  

SciTech Connect

This report identifies the dose response data available for several toxic mercury compounds and summarizes the symptoms and health effects associated with each of them.

HONEYMAN, J.O.

2005-12-13T23:59:59.000Z

58

Mercury Risk Assessment II  

NLE Websites -- All DOE Office Websites (Extended Search)

Protection Agency in 2005, will require significant reductions in mercury emissions from coal-fired power plants. In formulating the regulations, a central point of debate...

59

Mercury Control Update 2009  

Science Conference Proceedings (OSTI)

EPRI has been evaluating cost-effective methods for reducing mercury emissions from coal-fired power plants. This report summarizes the current status of mercury control technologies and offers detailed discussion of boiler bromide addition balance-of-plant impacts and activated carbon injection (ACI) tests at selected sites.

2009-12-14T23:59:59.000Z

60

DOE Mercury Control Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Control Research Mercury Control Research Air Quality III: Mercury, Trace Elements, and Particulate Matter September 9-12, 2002 Rita A. Bajura, Director National Energy Technology Laboratory www.netl.doe.gov 169330 RAB 09/09/02 2 Potential Mercury Regulations MACT Standards * Likely high levels of Hg reduction * Compliance: 2007 Clean Power Act of 2001 * 4-contaminant control * 90% Hg reduction by 2007 Clear Skies Act of 2002 * 3-contaminant control * 46% Hg reduction by 2010 * 70% Hg reduction by 2018 * Hg emission trading President Bush Announcing Clear Skies Initiative February 14, 2002 169330 RAB 09/09/02 3 Uncertainties Mercury Control Technologies * Balance-of-plant impacts * By-product use and disposal * Capture effectiveness with low-rank coals * Confidence of performance 169330 RAB 09/09/02 4

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

NETL: Mercury Emissions Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Mercury Emissions Control Home > Technologies > Coal & Power Systems > Innovations for Existing Plants > Mercury Emissions Control Innovations for Existing Plants Mercury Emissions Control NETL managed the largest funded research program in the country to develop an in-depth understanding of fossil combustion-based mercury emissions. The program goal was to develop effective control options that would allow generators to comply with regulations. Research focus areas included measurement and characterization of mercury emissions, as well as the development of cost-effective control technologies for the U.S. coal-fired electric generating industry. Control Technologies Field Testing Phase I & II Phase III Novel Concepts APCD Co-benefits Emissions Characterization

62

Definition: Mercury Vapor | Open Energy Information  

Open Energy Info (EERE)

Mercury Vapor Jump to: navigation, search Dictionary.png Mercury Vapor Mercury is discharged as a highly volatile vapor during hydrothermal activity and high concentrations in...

63

Mercury Sensing with Optically Responsive Gold Nanoparticles  

E-Print Network (OSTI)

We assume that the mass of mercury adsorbed at saturation istactics, nanoparticle based mercury sensing should advancemost sensitive method for mercury sensing. References "1!

James, Jay Zachary

2012-01-01T23:59:59.000Z

64

Gaseous mercury release during steam curing of aerated concretes that contain fly ash and activated carbon sorbent  

Science Conference Proceedings (OSTI)

Gaseous mercury released from aerated concrete during both presteam curing at 25{sup o}C and steam curing at 80{sup o}C was measured in controlled laboratory experiments. Mercury release originated from two major components in the concrete mixture: (1) class F coal fly ash and (2) a mixture of the fly ash and powdered activated carbon onto which elemental mercury was adsorbed. Mercury emitted during each curing cycle was collected on iodated carbon traps in a purge-and-trap arrangement and subsequently measured by cold-vapor atomic fluorescence spectrometry. Through 3 h of presteam curing, the release of mercury from the freshly prepared mixture was less than 0.03 ng/kg of concrete. Releases of total mercury over the 21 h steam curing process ranged from 0.4 to 5.8 ng of mercury/kg of concrete and depended upon mercury concentrations in the concrete. The steam-cured concrete had a higher mercury release rate (ng kg{sup -1} h{sup -1}) compared to air-cured concrete containing fly ash, but the shorter curing interval resulted in less total release of mercury from the steam-cured concrete. The mercury flux from exposed concrete surfaces to mercury-free air ranged from 0.77 to 11.1 ng m{sup -2} h{sup -1}, which was similar to mercury fluxes for natural soils to ambient air of 4.2 ng m{sup -2} h{sup -1} reported by others. Less than 0.022% of the total quantity of mercury present from all mercury sources in the concrete was released during the curing process, and therefore, nearly all of the mercury was retained in the concrete. 31 refs., 4 figs., 2 tabs.

Danold W. Golightly; Chin-Min Cheng; Ping Sun; Linda K. Weavers; Harold W. Walker; Panuwat Taerakul; William E. Wolfe [Ohio State University, Columbus, OH (United States). Department of Civil and Environmental Engineering and Geodetic Science

2008-09-15T23:59:59.000Z

65

Removal of Elemental Mercury from a Gas Stream Facilitated by a Non-Thermal Plasma Device  

SciTech Connect

Mercury generated from anthropogenic sources presents a difficult environmental problem. In comparison to other toxic metals, mercury has a low vaporization temperature. Mercury and mercury compounds are highly toxic, and organic forms such as methyl mercury can be bio-accumulated. Exposure pathways include inhalation and transport to surface waters. Mercury poisoning can result in both acute and chronic effects. Most commonly, chronic exposure to mercury vapor affects the central nervous system and brain, resulting in neurological damage. The CRE technology employs a series of non-thermal, plasma-jet devices to provide a method for elemental mercury removal from a gas phase by targeting relevant chemical reactions. The technology couples the known chemistry of converting elemental mercury to ionic compounds by mercury-chlorine-oxygen reactions with the generation of highly reactive species in a non-thermal, atmospheric, plasma device. The generation of highly reactive metastable species in a non-thermal plasma device is well known. The introduction of plasma using a jet-injection device provides a means to contact highly reactive species with elemental mercury in a manner to overcome the kinetic and mass-transfer limitations encountered by previous researchers. To demonstrate this technology, WRI has constructed a plasma test facility that includes plasma reactors capable of using up to four plasma jets, flow control instrumentation, an integrated control panel to operate the facility, a mercury generation system that employs a temperature controlled oven and permeation tube, combustible and mercury gas analyzers, and a ductless fume hood designed to capture fugitive mercury emissions. Continental Research and Engineering (CR&E) and Western Research Institute (WRI) successfully demonstrated that non-thermal plasma containing oxygen and chlorine-oxygen reagents could completely convert elemental mercury to an ionic form. These results demonstrate potential the application of this technology for removing elemental mercury from flue gas streams generated by utility boilers. On an absolute basis, the quantity of reagent required to accomplish the oxidation was small. For example, complete oxidation of mercury was accomplished using a 1% volume fraction of oxygen in a nitrogen stream. Overall, the tests with mercury validated the most useful aspect of the CR&E technology: Providing a method for elemental mercury removal from a gas phase by employing a specific plasma reagent to either increase reaction kinetics or promote reactions that would not have occurred under normal circumstances.

Charles Mones

2006-12-01T23:59:59.000Z

66

Recovery of mercury from mercury compounds via electrolytic methods  

DOE Patents (OSTI)

A process for electrolytically recovering mercury from mercury compounds is provided. In one embodiment, Hg is recovered from Hg.sub.2 Cl.sub.2 employing as the electrolyte solution a mixture of HCl and H.sub.2 O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H.sub.2 O. Also provided is an apparatus for producing isotopically enriched mercury compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where mercury ions are electrolytically reduced and elemental mercury recovered from the mercury compounds.

Grossman, Mark W. (Belmont, MA); George, William A. (Rockport, MA)

1988-01-01T23:59:59.000Z

67

Recovery of mercury from mercury compounds via electrolytic methods  

DOE Patents (OSTI)

A process for electrolytically recovering mercury from mercury compounds is provided. In one embodiment, Hg is recovered from Hg[sub 2]Cl[sub 2] employing as the electrolyte solution a mixture of HCl and H[sub 2]O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H[sub 2]O. Also provided is an apparatus for producing isotopically enriched mercury compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where mercury ions are electrolytically reduced and elemental mercury recovered from the mercury compounds. 3 figs.

Grossman, M.W.; George, W.A.

1989-11-07T23:59:59.000Z

68

Recovery of mercury from mercury compounds via electrolytic methods  

DOE Patents (OSTI)

A process for electrolytically recovering mercury from mercury compounds is provided. In one embodiment, Hg is recovered from Hg.sub.2 Cl.sub.2 employing as the electrolyte solution a mixture of HCl and H.sub.2 O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H.sub.2 O. Also provided is an apparatus for producing isotopically enriched mercury compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where mercury ions are electrolytically reduced and elemental mercury recovered from the mercury compounds.

Grossman, Mark W. (Belmont, MA); George, William A. (Rockport, MA)

1989-01-01T23:59:59.000Z

69

Recovery of mercury from mercury compounds via electrolytic methods  

DOE Patents (OSTI)

A process for electrolytically recovering mercury from mercury compounds is provided. In one embodiment, Hg is recovered from Hg.sub.2 Cl.sub.2 employing as the electrolyte solution a mixture of HCl and H.sub.2 O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H.sub.2 O. Also provided is an apparatus for producing isotopically enriched mercury compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where mercury ions are electrolytically reduced and elemental mercury recovered from the mercury compounds.

Grossman, Mark W. (Belmont, MA); George, William A. (Rockport, MA)

1991-01-01T23:59:59.000Z

70

Recovery of mercury from mercury compounds via electrolytic methods  

DOE Patents (OSTI)

A process for electrolytically recovering mercury from mercury compounds is provided. In one embodiment, Hg is recovered from Hg[sub 2]Cl[sub 2] employing as the electrolyte solution a mixture of HCl and H[sub 2]O. In another embodiment, Hg is electrolytically recovered from HgO wherein the electrolyte solution is comprised of glacial acetic acid and H[sub 2]O. Also provided is an apparatus for producing isotopically enriched mercury compounds in a reactor and then transporting the dissolved compounds into an electrolytic cell where mercury ions are electrolytically reduced and elemental mercury recovered from the mercury compounds. 3 figures.

Grossman, M.W.; George, W.A.

1991-06-18T23:59:59.000Z

71

Mercury Risk Assessment  

NLE Websites -- All DOE Office Websites (Extended Search)

ASSESSING THE MERCURY HEALTH RISKS ASSOCIATED ASSESSING THE MERCURY HEALTH RISKS ASSOCIATED WITH COAL-FIRED POWER PLANTS: IMPACTS OF LOCAL DEPOSITIONS *T.M. Sullivan 1 , F.D. Lipfert 2 , S.M. Morris 2 , and S. Renninger 3 1 Building 830, Brookhaven National Laboratory, Upton, NY 11973 2 Private Consultants 3 Department of Energy, National Energy Technology Laboratory, Morgantown, WV ABSTRACT The U.S. Environmental Protection Agency has announced plans to regulate emissions of mercury to the atmosphere from coal-fired power plants. However, there is still debate over whether the limits should be placed on a nationwide or a plant-specific basis. Before a nationwide limit is selected, it must be demonstrated that local deposition of mercury from coal-fired power plants does not impose an excessive local health risk. The principal health

72

Multimedia Mercury Fate at Coal-Fired Power Plants Equipped With SCR and Wet FGD Controls  

Science Conference Proceedings (OSTI)

Given the current regulatory climate in the United States, a number of selective catalytic reduction (SCR) and flue gas desulfurization (FGD) systems will be installed at new and existing coal-fired power plants to remove nitrogen oxide (NOx), sulfur dioxide (SO2), and mercury. The multimedia fate of trace metal species, especially mercury, in SCR/wet FGD systems is not well understood. Understanding and quantifying the amount of mercury removed from the flue gas and distributed to the solid and aqueous ...

2008-03-19T23:59:59.000Z

73

Mercury Control Update 2010  

Science Conference Proceedings (OSTI)

A February 2008 decision by the U.S. District of Columbia Circuit Court of Appeals remanded the Clean Air Mercury Rule back to the U.S. Environmental Protection Agency, opening the possibility of more stringent federal emission limits similar to those already adopted by some states. To meet these stringent limits, high mercury removals based on Maximum Achievable Control Technology for individual power plants may be needed. To help electric power companies comply with tightening emission standards in a ...

2010-12-31T23:59:59.000Z

74

Method and apparatus for monitoring mercury emissions  

DOE Patents (OSTI)

A mercury monitoring device that continuously monitors the total mercury concentration in a gas. The device uses the same chamber for converting speciated mercury into elemental mercury and for measurement of the mercury in the chamber by radiation absorption techniques. The interior of the chamber is resistant to the absorption of speciated and elemental mercury at the operating temperature of the chamber. 15 figs.

Durham, M.D.; Schlager, R.J.; Sappey, A.D.; Sagan, F.J.; Marmaro, R.W.; Wilson, K.G.

1997-10-21T23:59:59.000Z

75

Method and apparatus for monitoring mercury emissions  

DOE Patents (OSTI)

A mercury monitoring device that continuously monitors the total mercury concentration in a gas. The device uses the same chamber for converting speciated mercury into elemental mercury and for measurement of the mercury in the chamber by radiation absorption techniques. The interior of the chamber is resistant to the absorption of speciated and elemental mercury at the operating temperature of the chamber.

Durham, Michael D. (Castle Rock, CO); Schlager, Richard J. (Aurora, CO); Sappey, Andrew D. (Golden, CO); Sagan, Francis J. (Lakewood, CO); Marmaro, Roger W. (Littleton, CO); Wilson, Kevin G. (Littleton, CO)

1997-01-01T23:59:59.000Z

76

Mercury speciation in Galveston Bay, Texas: the importance of complexation by natural organic ligands  

E-Print Network (OSTI)

The major goal of this research is the development of a competitive ligand equilibration-solvent solvent extraction (CLE-SSE) method to determine organically complexed mercury species in estuarine water. The method was applied to estuarine surface waters of Galveston Bay and the water column of Offatts Bayou. Thermodynamic equilibrium modeling estimated organically complexed mercury species in estuarine water using the conditional stability constants of mercury-organic complexes and the concentrations of organic ligands determined by CLE-SSE. Two competing ligands, chloride and thiosalicylic acid (TSA), were used for CLE-SSE. Chloride ion competition determined conditional stability constants for 1 : 1 mercury-ligand complexes ranging from ~1023 to ~1024 with concentrations of organic ligands at low nM levels. TSA competition determined stronger mercury-binding ligands by manipulating the TSA concentration such that a higher binding strength was achieved than that for the mercury-chloride complex. TSA competition determined conditional stability constants for 1 : 1 mercury-ligand complexes ranging from ~1027 to ~1029, with ligand concentrations ranging from 10 to 100 pM. Mercury-organic binding strengths in these ranges are consistent with bidentate mercury complexation by low molecular weight organic thiols. A linear relationship was observed between log stability constants for the mercury-ligand complex and log ligand concentrations, supporting the hypothesis that there is a continuum of mercury binding site strengths associated with dissolved organic matter. In Galveston Bay, organically complexed mercury accounted for > 95 % of the total dissolved mercury in surface water. Organic complexation of mercury coupled with mercury dissolution from particulate phases controls the filter-passing mercury distribution in surface waters of Galveston Bay. The estuarine distributional features of mercury-complexing organic ligands were similar to those of glutathione, supporting mercury complexation by a thiol binding group. In Offatts Bayou, a seasonally anoxic bayou on Galveston Bay, thermodynamic equilibrium modeling suggests that the speciation of dissolved mercury in anoxic systems is dominated by sulfide complexation rather than organic complexation.

Han, Seunghee

2004-12-01T23:59:59.000Z

77

NETL: Mercury Emissions Inactive Mercury Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Completed Mercury Projects Completed Mercury Projects View specific project information by clicking the state of interest on the map. Clickable U.S. Map ALABAMA Characterizing Toxic Emissions from Coal-Fired Power Plants Southern Research Institute The objective of this contract is to perform sampling and analysis of air toxic emissions at commercial coal-fired power plants in order to collect data that the EPA will use in their Congressionally mandated report on Hazardous Air Pollutants from Electric Utilities. CALIFORNIA Assessment of Toxic Emissions from a Coal-Fired Power Plant Utilizing an ESP Energy & Environmental Research Corporation – CA The overall objective of this project is to conduct comprehensive assessments of toxic emissions of two coal-fired electric utility power plants. The power plant that was assessed for toxic emissions during Phase I was American Electric Power Service Corporation's Cardinal Station Unit 1.

78

Groundwater Discharge of Mercury to California Coastal Waters  

E-Print Network (OSTI)

too much is consumed. This toxic form of mercury is producedfrom inorganic mercury by sulfur- and iron-reducing bacteriadischarge of total mercury and monomethyl mercury to central

Flegal, Russell; Paytan, Adina; Black, Frank

2009-01-01T23:59:59.000Z

79

ORNL DAAC Announces Mercury EOS  

NLE Websites -- All DOE Office Websites (Extended Search)

Announces Mercury EOS Search and Order April 21, 2003: Mercury EOS, the ORNL DAAC's new search and order system that works with NASA's EOS ClearingHouse (ECHO), is now operational....

80

Dynamic Mercury Cycling Model Upgrade  

Science Conference Proceedings (OSTI)

This technical update describes the status of activities to upgrade the Dynamic Mercury Cycling Model (D-MCM), an EPRI simulation model that predicts mercury cycling and bioaccumulation in lakes.

2008-12-17T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Where Does Mercury in the Arctic Environment Come From, and How Does it Get There?  

E-Print Network (OSTI)

that were placed in an oven at 50 °C overnight to ensure complete oxidation of all mercury species. Analysis requiring pollutant scrubbers that also likely remove a fraction of the Hg in flue gases. If so, the resultsAtmospheric Mercury Deposition during the Last 270 Years: A Glacial Ice Core Record of Natural

Douglas, Thomas A.

82

Science and strategies to reduce mercury risks: a critical review Noelle E. Selin*  

E-Print Network (OSTI)

dioxide, nitrogen oxides, mercury, carbon dioxide) · Recent trends in emissions/impacts · Current policy") · Acid gases (sulfur oxides, nitrogen oxides) released from power plants can react in atmospheric to form emissions - elemental and oxidized mercury Global and regional sources Natural emissions Key species: Hg° Hg

83

Gas Mileage of 1994 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Mercury Vehicles 4 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1994 Mercury Capri 4 cyl, 1.6 L, Automatic 4-spd, Regular Gasoline Compare 1994 Mercury Capri 20 City 21 Combined 24 Highway 1994 Mercury Capri 4 cyl, 1.6 L, Manual 5-spd, Regular Gasoline Compare 1994 Mercury Capri 21 City 23 Combined 26 Highway 1994 Mercury Capri 4 cyl, 1.6 L, Manual 5-spd, Regular Gasoline Compare 1994 Mercury Capri 22 City 24 Combined 28 Highway 1994 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1994 Mercury Cougar 17 City 19 Combined 24 Highway 1994 Mercury Cougar 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1994 Mercury Cougar 16 City 18 Combined 23 Highway 1994 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1994 Mercury Grand Marquis 16

84

Gas Mileage of 1985 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

5 Mercury Vehicles 5 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1985 Mercury Capri 4 cyl, 2.3 L, Automatic 3-spd, Regular Gasoline Compare 1985 Mercury Capri 19 City 20 Combined 23 Highway 1985 Mercury Capri 4 cyl, 2.3 L, Manual 4-spd, Regular Gasoline Compare 1985 Mercury Capri 21 City 23 Combined 27 Highway 1985 Mercury Capri 6 cyl, 3.8 L, Automatic 3-spd, Regular Gasoline Compare 1985 Mercury Capri 17 City 18 Combined 20 Highway 1985 Mercury Capri 8 cyl, 5.0 L, Manual 5-spd, Regular Gasoline Compare 1985 Mercury Capri 15 City 17 Combined 22 Highway 1985 Mercury Capri 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1985 Mercury Capri 15 City 17 Combined 22 Highway 1985 Mercury Capri 4 cyl, 2.3 L, Automatic 3-spd, Regular Gasoline Compare 1985 Mercury Capri 18 City

85

ALTERNATIVE FIELD METHODS TO TREAT MERCURY IN SOIL  

Science Conference Proceedings (OSTI)

U.S. Department of Energy (DOE) used large quantities of mercury in the uranium separating process from the 1950s until the late 1980s in support of national defense. Some of this mercury, as well as other hazardous metals and radionuclides, found its way into, and under, several buildings, soil and subsurface soils and into some of the surface waters. Several of these areas may pose potential health or environmental risks and must be dealt with under current environmental regulations. DOE's National Energy Technology Laboratory (NETL) awarded a contract ''Alternative Field Methods to Treat Mercury in Soil'' to IT Group, Knoxville TN (IT) and its subcontractor NFS, Erwin, TN to identify remedial methods to clean up mercury-contaminated high-clay content soils using proven treatment chemistries. The sites of interest were the Y-12 National Security Complex located in Oak Ridge, Tennessee, the David Witherspoon properties located in Knoxville, Tennessee, and at other similarly contaminated sites. The primary laboratory-scale contract objectives were (1) to safely retrieve and test samples of contaminated soil in an approved laboratory and (2) to determine an acceptable treatment method to ensure that the mercury does not leach from the soil above regulatory levels. The leaching requirements were to meet the TC (0.2 mg/l) and UTS (0.025 mg/l) TCLP criteria. In-situ treatments were preferred to control potential mercury vapors emissions and liquid mercury spills associated with ex-situ treatments. All laboratory work was conducted in IT's and NFS laboratories. Mercury contaminated nonradioactive soil from under the Alpha 2 building in the Y-12 complex was used. This soils contained insufficient levels of leachable mercury and resulted in TCLP mercury concentrations that were similar to the applicable LDR limits. The soil was spiked at multiple levels with metallic (up to 6000 mg/l) and soluble mercury compounds (up to 500 mg/kg) to simulate expected ranges of mercury contamination and to increase the TCLP mercury values. IT/NFS investigated ambient temperature amalgamation/stabilization/fixation of mercury-contaminated soils to meet these objectives. Treatment ranged in size from a few ounces to 10 pounds. The treatability study philosophy was to develop working envelops of formulations where reasonable minimum and maximum amounts of each reagent that would successfully treat the contaminated soil were determined. The dosages investigated were based on ratios of stoichiometric reactions and applications of standard sets of formulations. The approach purposely identified formulations that failed short or longer cure-time performance criteria to define the limits of the envelope. Reagent envelops successfully met the project requirements one day after treatment and after greater than 30-day cures. The use of multiple levels of spikes allowed the establishment of reagent dosages that were successful across a broad range of mercury values, e.g., 50 to 6000 mg/kg mercury. The treatment products were damp to slightly wet material. Enough drying reagent, e.g., Portland cement or lime by-product, were added to some formulations to control the leachability of uranium and other hazardous metals and to ensure the product passed the paint filter test. Cost analyzes and conceptual designs for four alternatives for full-scale treatments were prepared. The alternatives included two in-situ treatments and two ex-situ treatments. The cost estimates were based on the results from the bench-scale study. All four alternatives treatment costs were well below the baseline costs.

Ernest F. Stine Jr; Steven T. Downey

2002-08-14T23:59:59.000Z

86

Investigation of a mercury speciation technique for flue gas desulfurization materials  

Science Conference Proceedings (OSTI)

Most of the synthetic gypsum generated from wet flue gas desulfurization (FGD) scrubbers is currently being used for wallboard production. Because oxidized mercury is readily captured by the wet FGD scrubber, and coal-fired power plants equipped with wet scrubbers desire to benefit from the partial mercury control that these systems provide, some mercury is likely to be bound in with the FGD gypsum and wallboard. In this study, the feasibility of identifying mercury species in the FGD gypsum and wallboard samples was investigated using a large sample size thermal desorption method and samples from power plants in Pennsylvania. Potential candidates of pure mercury standards including mercuric chloride, mercurous chloride, mercury oxide, mercury sulfide, and mercuric sulfate were analyzed to compare their results with those obtained from FGD gypsum and dry wallboard samples. Although any of the thermal evolutionary curves obtained from these pure mercury standards did not exactly match with those of the FGD gypsum and wallboard samples, it was identified that Hg{sub 2}Cl{sub 2} and HgCl{sub 2} could be candidates. An additional chlorine analysis from the gypsum and wallboard samples indicated that the chlorine concentrations were approximately 2 orders of magnitude higher than the mercury concentrations, suggesting possible chlorine association with mercury. 21 refs., 5 figs., 3 tabs.

Lee, J.Y.; Cho K.; Cheng L.; Keener, T.C.; Jegadeesan G.; Al-Abed, S.R. [University of Cincinnati, Cincinnati, OH (United States). Department of Chemical and Materials Engineering

2009-08-15T23:59:59.000Z

87

NETL: Mercury Emissions Control Technologies - Oxidation of Mercury Across  

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Oxidation of Mercury Across SCR Catalysts in Coal-Fired Power Plants Burning Low Rank Fuels Oxidation of Mercury Across SCR Catalysts in Coal-Fired Power Plants Burning Low Rank Fuels The objective of the proposed research is to assess the potential for the oxidation of mercury in flue gas across SCR catalysts in a coal fired power plant burning low rank fuels using a slipstream reactor containing multiple commercial catalysts in parallel. Results from the project will contribute to a greater understanding of mercury behavior across SCR catalysts. Additional tasks include: review existing pilot and field data on mercury oxidation across SCR catalysts and propose a mechanism for mercury oxidation and create a simple computer model for mercury oxidation based on the hypothetical mechanism. Related Papers and Publications: Final Report - December 31, 2004 [PDF-532KB]

88

Water displacement mercury pump  

DOE Patents (OSTI)

A water displacement mercury pump has a fluid inlet conduit and diffuser, a valve, a pressure cannister, and a fluid outlet conduit. The valve has a valve head which seats in an opening in the cannister. The entire assembly is readily insertable into a process vessel which produces mercury as a product. As the mercury settles, it flows into the opening in the cannister displacing lighter material. When the valve is in a closed position, the pressure cannister is sealed except for the fluid inlet conduit and the fluid outlet conduit. Introduction of a lighter fluid into the cannister will act to displace a heavier fluid from the cannister via the fluid outlet conduit. The entire pump assembly penetrates only a top wall of the process vessel, and not the sides or the bottom wall of the process vessel. This insures a leak-proof environment and is especially suitable for processing of hazardous materials.

Nielsen, Marshall G. (Woodside, CA)

1985-01-01T23:59:59.000Z

89

Water displacement mercury pump  

DOE Patents (OSTI)

A water displacement mercury pump has a fluid inlet conduit and diffuser, a valve, a pressure cannister, and a fluid outlet conduit. The valve has a valve head which seats in an opening in the cannister. The entire assembly is readily insertable into a process vessel which produces mercury as a product. As the mercury settles, it flows into the opening in the cannister displacing lighter material. When the valve is in a closed position, the pressure cannister is sealed except for the fluid inlet conduit and the fluid outlet conduit. Introduction of a lighter fluid into the cannister will act to displace a heavier fluid from the cannister via the fluid outlet conduit. The entire pump assembly penetrates only a top wall of the process vessel, and not the sides or the bottom wall of the process vessel. This insures a leak-proof environment and is especially suitable for processing of hazardous materials.

Nielsen, M.G.

1984-04-20T23:59:59.000Z

90

Mercury Vapor | Open Energy Information  

Open Energy Info (EERE)

Mercury Vapor Mercury Vapor Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Mercury Vapor Details Activities (23) Areas (23) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Lab Analysis Techniques Exploration Sub Group: Fluid Lab Analysis Parent Exploration Technique: Fluid Lab Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Anomalously high concentrations can indicate high permeability or conduit for fluid flow Hydrological: Field wide soil sampling can generate a geometrical approximation of fluid circulation Thermal: High concentration in soils can be indicative of active hydrothermal activity Dictionary.png Mercury Vapor: Mercury is discharged as a highly volatile vapor during hydrothermal

91

SAP for Mercury Control  

Science Conference Proceedings (OSTI)

EPRI and the Illinois State Geological Survey (ISGS) have developed and patented a technology for the on-site production of activated carbon (AC). The basic approach of the sorbent activation process (SAP) is to use coal from the plant site to form AC for direct injection into flue gas, upstream of the particulate control device, for mercury adsorption. The SAP is designed to help significantly reduce the cost of AC for power plant mercury control. This report summarizes laboratory and Phase 1 field test...

2009-06-17T23:59:59.000Z

92

Mercury Controls Update 2011  

Science Conference Proceedings (OSTI)

In light of the proposed Maximum Achievable Control Technology (MACT) ruling for hazardous air pollutants (HAPs) issued by the U.S. Environmental Protection Agency on March 16, 2011, the requirement to reduce emissions of mercury and other HAPs is one of the key challenges for coal-fired power plants. The proposed MACT ruling limits mercury emissions to 1.2 lb/TBtu at the stack (4.0 lb/TBtu for lignite-fired units), based on a 30-day rolling average including startup and shutdown periods. To help electri...

2011-12-21T23:59:59.000Z

93

Mercury in FGD Byproducts  

Science Conference Proceedings (OSTI)

This report provides interim results from two EPRI co-funded projects that pertain to what happens to mercury in flue gas from coal-fired power boilers when the scrubbed by wet flue gas desulfurization (FGD) systems. The first project is co-sponsored by the U.S. Department of Energy's National Energy Technology Laboratory (NETL) and by USG Corporation under Cooperative Agreement DE-FC26-04NT42080, "Fate of Mercury in Synthetic Gypsum Used for Wallboard Production." The second project is being co-sponsore...

2005-12-07T23:59:59.000Z

94

It's Elemental - The Element Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Gold Gold Previous Element (Gold) The Periodic Table of Elements Next Element (Thallium) Thallium The Element Mercury [Click for Isotope Data] 80 Hg Mercury 200.59 Atomic Number: 80 Atomic Weight: 200.59 Melting Point: 234.32 K (-38.83°C or -37.89°F) Boiling Point: 629.88 K (356.73°C or 674.11°F) Density: 13.5336 grams per cubic centimeter Phase at Room Temperature: Liquid Element Classification: Metal Period Number: 6 Group Number: 12 Group Name: none What's in a name? Named after the planet Mercury. Mercury's chemical symbol comes from the Greek word hydrargyrum, which means "liquid silver." Say what? Mercury is pronounced as MER-kyoo-ree. History and Uses: Mercury was known to the ancient Chinese and Hindus and has been found in 3500 year old Egyptian tombs. Mercury is not usually found free in nature

95

Gas Mileage of 1986 Vehicles by Mercury  

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6 Mercury Vehicles 6 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1986 Mercury Capri 4 cyl, 2.3 L, Automatic 3-spd, Regular Gasoline Compare 1986 Mercury Capri 18 City 20 Combined 23 Highway 1986 Mercury Capri 4 cyl, 2.3 L, Manual 4-spd, Regular Gasoline Compare 1986 Mercury Capri 21 City 23 Combined 26 Highway 1986 Mercury Capri 6 cyl, 3.8 L, Automatic 3-spd, Regular Gasoline Compare 1986 Mercury Capri 17 City 19 Combined 22 Highway 1986 Mercury Capri 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1986 Mercury Capri 15 City 18 Combined 24 Highway 1986 Mercury Capri 8 cyl, 5.0 L, Manual 5-spd, Regular Gasoline Compare 1986 Mercury Capri View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 1986 Mercury Cougar 4 cyl, 2.3 L, Automatic 3-spd, Regular Gasoline

96

Gas Mileage of 1991 Vehicles by Mercury  

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1 Mercury Vehicles 1 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1991 Mercury Capri 4 cyl, 1.6 L, Automatic 4-spd, Regular Gasoline Compare 1991 Mercury Capri 21 City 22 Combined 24 Highway 1991 Mercury Capri 4 cyl, 1.6 L, Manual 5-spd, Regular Gasoline Compare 1991 Mercury Capri View MPG Estimates Shared By Vehicle Owners 21 City 23 Combined 26 Highway 1991 Mercury Capri 4 cyl, 1.6 L, Manual 5-spd, Regular Gasoline Compare 1991 Mercury Capri 22 City 24 Combined 28 Highway 1991 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1991 Mercury Cougar 17 City 20 Combined 24 Highway 1991 Mercury Cougar 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1991 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 16 City 18 Combined 22 Highway 1991 Mercury Grand Marquis 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline

97

Method and apparatus for sampling atmospheric mercury  

DOE Patents (OSTI)

A method of simultaneously sampling particulate mercury, organic mercurial vapors, and metallic mercury vapor in the working and occupational environment and determining the amount of mercury derived from each such source in the sampled air. A known volume of air is passed through a sampling tube containing a filter for particulate mercury collection, a first adsorber for the selective adsorption of organic mercurial vapors, and a second adsorber for the adsorption of metallic mercury vapor. Carbon black molecular sieves are particularly useful as the selective adsorber for organic mercurial vapors. The amount of mercury adsorbed or collected in each section of the sampling tube is readily quantitatively determined by flameless atomic absorption spectrophotometry.

Trujillo, Patricio E. (Santa Fe, NM); Campbell, Evan E. (Los Alamos, NM); Eutsler, Bernard C. (Los Alamos, NM)

1976-01-20T23:59:59.000Z

98

Mercury Information Clearinghouse  

SciTech Connect

The Canadian Electricity Association (CEA) identified a need and contracted the Energy & Environmental Research Center (EERC) to create and maintain an information clearinghouse on global research and development activities related to mercury emissions from coal-fired electric utilities. With the support of CEA, the Center for Air Toxic Metals{reg_sign} (CATM{reg_sign}) Affiliates, and the U.S. Department of Energy (DOE), the EERC developed comprehensive quarterly information updates that provide a detailed assessment of developments in the various areas of mercury monitoring, control, policy, and research. A total of eight topical reports were completed and are summarized and updated in this final CEA quarterly report. The original quarterly reports can be viewed at the CEA Web site (www.ceamercuryprogram.ca). In addition to a comprehensive update of previous mercury-related topics, a review of results from the CEA Mercury Program is provided. Members of Canada's coal-fired electricity generation sector (ATCO Power, EPCOR, Manitoba Hydro, New Brunswick Power, Nova Scotia Power Inc., Ontario Power Generation, SaskPower, and TransAlta) and CEA, have compiled an extensive database of information from stack-, coal-, and ash-sampling activities. Data from this effort are also available at the CEA Web site and have provided critical information for establishing and reviewing a mercury standard for Canada that is protective of environment and public health and is cost-effective. Specific goals outlined for the CEA mercury program included the following: (1) Improve emission inventories and develop management options through an intensive 2-year coal-, ash-, and stack-sampling program; (2) Promote effective stack testing through the development of guidance material and the support of on-site training on the Ontario Hydro method for employees, government representatives, and contractors on an as-needed basis; (3) Strengthen laboratory analytical capabilities through analysis and quality assurance programs; and (4) Create and maintain an information clearinghouse to ensure that all parties can keep informed on global mercury research and development activities.

Chad A. Wocken; Michael J. Holmes; Dennis L. Laudal; Debra F. Pflughoeft-Hassett; Greg F. Weber; Nicholas V. C. Ralston; Stanley J. Miller; Grant E. Dunham; Edwin S. Olson; Laura J. Raymond; John H. Pavlish; Everett A. Sondreal; Steven A. Benson

2006-03-31T23:59:59.000Z

99

Catalyst Additives to Enhance Mercury Oxidation and Capture  

SciTech Connect

Preliminary research has shown that SCR catalysts employed for nitrogen-oxide reduction can effectively oxidize mercury. This report discusses initial results from fundamental investigations into the behavior of mercury species in the presence of SCR catalysts at Southern Research Institute. Three different SCR catalysts are being studied. These are honeycomb-type, plate-type, and a hybrid-type catalyst. The catalysts are manufactured and supplied by Cormetech Inc., Hitachi America Ltd., and Haldor-Topsoe Inc., respectively. Test methods and experimental procedures were developed for current and future testing. The methods and procedures equalize factors influencing mercury adsorption and oxidation (surface area, catalyst activity, and pore structure) that normally differ for each catalyst type. Initial testing was performed to determine the time necessary for each catalyst to reach surface-adsorption equilibrium. In addition, the fraction of Hg oxidized by each of the SCR catalyst types is being investigated, for a given amount of catalyst and flow rate of mercury and flue gas. The next major effort will be to examine the kinetics of mercury oxidation across the SCR catalysts with respect to changes in mercury concentration and with respect to HCl concentration. Hg-sorption equilibrium times will also be investigated with respect to ammonia concentration in the simulated flue gas.

Jared W. Cannon; Thomas K. Gale

2004-12-31T23:59:59.000Z

100

Analytical Methods for Measuring Mercury in Water, Sediment and Biota  

Science Conference Proceedings (OSTI)

Mercury (Hg) exists in a large number of physical and chemical forms with a wide range of properties. Conversion between these different forms provides the basis for mercury's complex distribution pattern in local and global cycles and for its biological enrichment and effects. Since the 1960’s, the growing awareness of environmental mercury pollution has stimulated the development of more accurate, precise and efficient methods of determining mercury and its compounds in a wide variety of matrices. During recent years new analytical techniques have become available that have contributed significantly to the understanding of mercury chemistry in natural systems. In particular, these include ultra sensitive and specific analytical equipment and contamination-free methodologies. These improvements allow for the determination of total mercury as well as major species of mercury to be made in water, sediments and soils, and biota. Analytical methods are selected depending on the nature of the sample, the concentration levels of mercury, and what species or fraction is to be quantified. The terms “speciation” and “fractionation” in analytical chemistry were addressed by the International Union for Pure and Applied Chemistry (IUPAC) which published guidelines (Templeton et al., 2000) or recommendations for the definition of speciation analysis. "Speciation analysis is the analytical activity of identifying and/or measuring the quantities of one or more individual chemical species in a sample. The chemical species are specific forms of an element defined as to isotopic composition, electronic or oxidation state, and/or complex or molecular structure. The speciation of an element is the distribution of an element amongst defined chemical species in a system. In case that it is not possible to determine the concentration of the different individual chemical species that sum up the total concentration of an element in a given matrix, meaning it is impossible to determine the speciation, it is a useful practice to do fractionation instead. Fractionation is the process of classification of an analyte or a group of analytes from a certain sample according to physical (e.g. size, solubility) or chemical (e.g. bonding, reactivity) properties."

Lasorsa, Brenda K.; Gill, Gary A.; Horvat, Milena

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Gas Mileage of 2008 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

8 Mercury Vehicles 8 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2008 Mercury Grand Marquis FFV 8 cyl, 4.6 L, Automatic 4-spd, Regular Gas or E85 Compare 2008 Mercury Grand Marquis FFV Gas 15 City 18 Combined 23 Highway E85 11 City 13 Combined 16 Highway 2008 Mercury Mariner 4WD 4 cyl, 2.3 L, Automatic 4-spd, Regular Gasoline Compare 2008 Mercury Mariner 4WD 19 City 21 Combined 24 Highway 2008 Mercury Mariner 4WD 6 cyl, 3.0 L, Automatic 4-spd, Regular Gasoline Compare 2008 Mercury Mariner 4WD View MPG Estimates Shared By Vehicle Owners 17 City 19 Combined 22 Highway 2008 Mercury Mariner FWD 4 cyl, 2.3 L, Automatic 4-spd, Regular Gasoline Compare 2008 Mercury Mariner FWD 20 City 22 Combined 26 Highway 2008 Mercury Mariner FWD 6 cyl, 3.0 L, Automatic 4-spd, Regular Gasoline Compare 2008 Mercury Mariner FWD

102

Gas Mileage of 1987 Vehicles by Mercury  

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7 Mercury Vehicles 7 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1987 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1987 Mercury Cougar 17 City 19 Combined 24 Highway 1987 Mercury Cougar 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1987 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 16 City 19 Combined 24 Highway 1987 Mercury Grand Marquis 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1987 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 16 City 19 Combined 24 Highway 1987 Mercury Grand Marquis Wagon 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1987 Mercury Grand Marquis Wagon 16 City 19 Combined 24 Highway 1987 Mercury Lynx 4 cyl, 1.9 L, Automatic 3-spd, Regular Gasoline Compare 1987 Mercury Lynx 23

103

Gas Mileage of 1990 Vehicles by Mercury  

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90 Mercury Vehicles 90 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1990 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Premium Gasoline Compare 1990 Mercury Cougar 15 City 18 Combined 21 Highway 1990 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1990 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 17 City 20 Combined 24 Highway 1990 Mercury Cougar 6 cyl, 3.8 L, Manual 5-spd, Premium Gasoline Compare 1990 Mercury Cougar 15 City 18 Combined 22 Highway 1990 Mercury Grand Marquis 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1990 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 22 Highway 1990 Mercury Grand Marquis Wagon 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1990 Mercury Grand Marquis Wagon 15

104

Gas Mileage of 1999 Vehicles by Mercury  

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1999 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1999 Mercury Cougar 4 cyl, 2.0 L, Automatic 4-spd, Regular Gasoline Compare 1999 Mercury Cougar View MPG Estimates Shared By...

105

Gas Mileage of 1984 Vehicles by Mercury  

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4 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1984 Mercury Capri 4 cyl, 2.3 L, Automatic 3-spd, Regular Gasoline Compare 1984 Mercury Capri 18 City 20 Combined 22 Highway 1984...

106

Gas Mileage of 1988 Vehicles by Mercury  

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8 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1988 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1988 Mercury Cougar 18 City 21 Combined 25 Highway 1988...

107

Gas Mileage of 1992 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1992 Mercury Capri 4 cyl, 1.6 L, Automatic 4-spd, Regular Gasoline Compare 1992 Mercury Capri View MPG Estimates Shared By Vehicle...

108

Gas Mileage of 1996 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

6 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1996 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1996 Mercury Cougar 17 City 19 Combined 24 Highway 1996...

109

Gas Mileage of 2007 Vehicles by Mercury  

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7 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2007 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 2007 Mercury Grand Marquis View MPG Estimates...

110

Gas Mileage of 2002 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

2 Mercury Vehicles 2 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2002 Mercury Cougar 4 cyl, 2.0 L, Manual 5-spd, Regular Gasoline Compare 2002 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 21 City 24 Combined 31 Highway 2002 Mercury Cougar 6 cyl, 2.5 L, Automatic 4-spd, Regular Gasoline Compare 2002 Mercury Cougar 18 City 21 Combined 26 Highway 2002 Mercury Cougar 6 cyl, 2.5 L, Manual 5-spd, Regular Gasoline Compare 2002 Mercury Cougar 18 City 21 Combined 27 Highway 2002 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 2002 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 2002 Mercury Mountaineer 2WD 6 cyl, 4.0 L, Automatic 5-spd, Regular Gasoline Compare 2002 Mercury Mountaineer 2WD 14 City

111

Gas Mileage of 1989 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

9 Mercury Vehicles 9 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1989 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1989 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 17 City 20 Combined 25 Highway 1989 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Premium Gasoline Compare 1989 Mercury Cougar 15 City 17 Combined 21 Highway 1989 Mercury Cougar 6 cyl, 3.8 L, Manual 5-spd, Premium Gasoline Compare 1989 Mercury Cougar 15 City 18 Combined 22 Highway 1989 Mercury Grand Marquis 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1989 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 22 Highway 1989 Mercury Grand Marquis Wagon 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1989 Mercury Grand Marquis Wagon 15

112

Gas Mileage of 1993 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

3 Mercury Vehicles 3 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1993 Mercury Capri 4 cyl, 1.6 L, Automatic 4-spd, Regular Gasoline Compare 1993 Mercury Capri 20 City 21 Combined 24 Highway 1993 Mercury Capri 4 cyl, 1.6 L, Manual 5-spd, Regular Gasoline Compare 1993 Mercury Capri View MPG Estimates Shared By Vehicle Owners 21 City 23 Combined 26 Highway 1993 Mercury Capri 4 cyl, 1.6 L, Manual 5-spd, Regular Gasoline Compare 1993 Mercury Capri View MPG Estimates Shared By Vehicle Owners 22 City 24 Combined 28 Highway 1993 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1993 Mercury Cougar 17 City 19 Combined 24 Highway 1993 Mercury Cougar 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1993 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 15

113

Recovery of mercury from acid waste residues  

DOE Patents (OSTI)

Mercury can be recovered from nitric acid-containing fluids by reacting the fluid with aluminum metal to produce mercury metal, and thence quenching the reactivity of the nitric acid prior to nitration of the mercury metal. 1 fig.

Greenhalgh, W.O.

1987-02-27T23:59:59.000Z

114

Recovery of mercury from acid waste residues  

DOE Patents (OSTI)

Mercury can be recovered from nitric acid-containing fluids by reacting the fluid with aluminum metal to produce mercury metal, and then quenching the reactivity of the nitric acid prior to nitration of the mercury metal.

Greenhalgh, Wilbur O. (Richland, WA)

1989-01-01T23:59:59.000Z

115

Mercury Binding Sites in Thiol-Functionalized Mesostructured Silica  

SciTech Connect

Thiol-functionalized mesostructured silica with anhydrous compositions of (SiO{sub 2}){sub 1-x}(LSiO{sub 1.5}){sub x}, where L is a mercaptopropyl group and x is the fraction of functionalized framework silicon centers, are effective trapping agents for the removal of mercuric(II) ions from water. In the present work, we investigate the mercury-binding mechanism for representative thiol-functionalized mesostructures by atomic pair distribution function (PDF) analysis of synchrotron X-ray powder diffraction data and by Raman spectroscopy. The mesostructures with wormhole framework structures and compositions corresponding to x = 0.30 and 0.50 were prepared by direct assembly methods in the presence of a structure-directing amine porogen. PDF analyses of five mercury-loaded compositions with Hg/S ratios of 0.50-1.30 provided evidence for the bridging of thiolate sulfur atoms to two metal ion centers and the formation of chain structures on the pore surfaces. We find no evidence for Hg-O bonds and can rule out oxygen coordination of the mercury at greater than the 10% level. The relative intensities of the PDF peaks corresponding to Hg-S and Hg-Hg atomic pairs indicate that the mercury centers cluster on the functionalized surfaces by virtue of thiolate bridging, regardless of the overall mercury loading. However, the Raman results indicate that the complexation of mercury centers by thiolate depends on the mercury loading. At low mercury loadings (Hg/S {le} 0.5), the dominant species is an electrically neutral complex in which mercury most likely is tetrahedrally coordinated to bridging thiolate ligands, as in Hg(SBu{sup t}){sub 2}. At higher loadings (Hg/S 1.0-1.3), mercury complex cations predominate, as evidenced by the presence of charge-balancing anions (nitrate) on the surface. This cationic form of bound mercury is assigned a linear coordination to two bridging thiolate ligands.

Billinge, Simon J.L.; McKimmey, Emily J.; Shatnawi, Mouath; Kim, HyunJeong; Petkov, Valeri; Wermeille, Didier; Pinnavaia, Thomas J. (MSU); (CMU); (Iowa State)

2010-07-13T23:59:59.000Z

116

FINAL REPORT ON THE AQUATIC MERCURY ASSESSMENT STUDY  

SciTech Connect

In February 2000, the United States Environmental Protection Agency (EPA) Region 4 issued a proposed Total Maximum Daily Load (TMDL) for total mercury in the middle and lower Savannah River. The initial TMDL, which would have imposed a 1 ng/l mercury limit for discharges to the middle/lower Savannah River, was revised to 2.8 ng/l in the final TMDL released in February 2001. The TMDL was intended to protect people from the consumption of contaminated fish, which is the major route of mercury exposure to humans. The most bioaccumulative form of mercury is methylmercury, which is produced in aquatic environments by the action of microorganisms on inorganic mercury. Because of the environmental and economic significance of the mercury discharge limits that would have been imposed by the TMDL, the Savannah River Site (SRS) initiated several studies concerning: (1) mercury in SRS discharges, SRS streams and the Savannah River, (2) mercury bioaccumulation factors for Savannah River fish, (3) the use of clams to monitor the influence of mercury from tributary streams on biota in the Savannah River, and (4) mercury in rainwater falling on the SRS. The results of these studies are presented in detail in this report. The first study documented the occurrence, distribution and variation of total and methylmercury at SRS industrial outfalls, principal SRS streams and the Savannah River where it forms the border with the SRS. All of the analyses were performed using the EPA Method 1630/31 ultra low-level and contaminant-free techniques for measuring total and methylmercury. Total mercury at National Pollutant Discharge Elimination System (NPDES) outfalls ranged from 0.31-604 ng/l with a mean of 8.71 ng/l. Mercury-contaminated groundwater was the source for outfalls with significantly elevated mercury concentrations. Total mercury in SRS streams ranged from 0.95-15.7 ng/l. Mean total mercury levels in the streams varied from 2.39 ng/l in Pen Branch to 5.26 ng/l in Tims Branch. Methylmercury ranged from 0.002 ng/l in Upper Three Runs to 2.60 ng/l in Tims Branch. Total mercury in the Savannah River ranged from 0.62 ng/l to 43.9 ng/l, and methylmercury ranged from 0.036 ng/l to 7.54 ng/l. Both total and methylmercury concentrations were consistently high in the river near the mouth of Steel Creek. Total mercury was positively correlated with methylmercury (r = 0.88). Total mercury bound to particulates ranged from 41% to 57% in the river and from 28% to 90% in the streams. Particulate methylmercury varied from 9% to 37% in the river and from 6% to 79% in the streams. Small temporary pools in the Savannah River swamp area near and around Fourmile Branch had the highest concentrations observed in the Savannah River watershed, reaching 1,890 ng/l for total mercury and 34.0 ng/l for methylmercury. The second study developed a mercury bioaccumulation factor (BAF) for the Savannah River near SRS. A BAF is the ratio of the concentration of mercury in fish flesh to the concentration of mercury in the water. BAFs are important in the TMDL process because target concentrations for mercury in water are computed from BAFs. Mercury BAFs are known to differ substantially among fish species, water bodies, and possibly seasons. Knowledge of such variation is needed to determine a BAF that accurately represents average and extreme conditions in the water body under study. Analysis of fish tissue and aqueous methylmercury samples collected at a number of locations and over several seasons in a 110 km (68 mile) reach of the Savannah River demonstrated that BAFs for each species under study varied by factors of three to eight. Influences on BAF variability were location, habitat and season-related differences in fish mercury levels and seasonal differences in methylmercury levels in the water. Overall (all locations, habitats, and seasons) average BAFs were 3.7 x 10{sup 6} for largemouth bass, 1.4 x 10{sup 6} for sunfishes, and 2.5 x 10{sup 6} for white catfish. This study showed that determination of representative BAFs for large rivers requires the collect

Halverson, N

2008-09-30T23:59:59.000Z

117

Bench-scale Kinetics Study of Mercury Reactions in FGD Liquors  

SciTech Connect

This document is the final report for Cooperative Agreement DE-FC26-04NT42314, 'Kinetics Study of Mercury Reactions in FGD Liquors'. The project was co-funded by the U.S. DOE National Energy Technology Laboratory and EPRI. The objective of the project has been to determine the mechanisms and kinetics of the aqueous reactions of mercury absorbed by wet flue gas desulfurization (FGD) systems, and develop a kinetics model to predict mercury reactions in wet FGD systems. The model may be used to determine optimum wet FGD design and operating conditions to maximize mercury capture in wet FGD systems. Initially, a series of bench-top, liquid-phase reactor tests were conducted and mercury species concentrations were measured by UV/visible light spectroscopy to determine reactant and byproduct concentrations over time. Other measurement methods, such as atomic absorption, were used to measure concentrations of vapor-phase elemental mercury, that cannot be measured by UV/visible light spectroscopy. Next, a series of bench-scale wet FGD simulation tests were conducted. Because of the significant effects of sulfite concentration on mercury re-emission rates, new methods were developed for operating and controlling the bench-scale FGD experiments. Approximately 140 bench-scale wet FGD tests were conducted and several unusual and pertinent effects of process chemistry on mercury re-emissions were identified and characterized. These data have been used to develop an empirically adjusted, theoretically based kinetics model to predict mercury species reactions in wet FGD systems. The model has been verified in tests conducted with the bench-scale wet FGD system, where both gas-phase and liquid-phase mercury concentrations were measured to determine if the model accurately predicts the tendency for mercury re-emissions. This report presents and discusses results from the initial laboratory kinetics measurements, the bench-scale wet FGD tests, and the kinetics modeling efforts.

Gary Blythe; John Currie; David DeBerry

2008-03-31T23:59:59.000Z

118

Public Health Guidance Note Mercury  

E-Print Network (OSTI)

Mercury (Hg) occurs in nature as the mineral cinnibar (red mercuric sulfide) and has found widespread use in industry. The commercial

unknown authors

2002-01-01T23:59:59.000Z

119

Method for mercury refinement  

DOE Patents (OSTI)

The effluent from mercury collected during the photochemical separation of the .sup.196 Hg isotope is often contaminated with particulate mercurous chloride, Hg.sub.2 Cl.sub.2. The use of mechanical filtering via thin glass tubes, ultrasonic rinsing with acetone (dimethyl ketone) and a specially designed cold trap have been found effective in removing the particulate (i.e., solid) Hg.sub.2 Cl.sub.2 contaminant. The present invention is particularly directed to such filtering.

Grossman, Mark W. (Belmont, MA); Speer, Richard (Reading, MA); George, William A. (Rockport, MA)

1991-01-01T23:59:59.000Z

120

Apparatus for mercury refinement  

DOE Patents (OSTI)

The effluent from mercury collected during the photochemical separation of the .sup.196 Hg isotope is often contaminated with particulate mercurous chloride, Hg.sub.2 Cl.sub.2. The use of mechanical filtering via thin glass tubes, ultrasonic rinsing with acetone (dimethyl ketone) and a specially designed cold trap have been found effective in removing the particulate (i.e., solid) Hg.sub.2 Cl.sub.2 contaminant. The present invention is particularly directed to such filtering.

Grossman, Mark W. (Belmont, MA); Speer, Richard (Reading, MA); George, William A. (Rockport, MA)

1991-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Apparatus for mercury refinement  

DOE Patents (OSTI)

The effluent from mercury collected during the photochemical separation of the [sup 196]Hg isotope is often contaminated with particulate mercurous chloride, Hg[sub 2]Cl[sub 2]. The use of mechanical filtering via thin glass tubes, ultrasonic rinsing with acetone (dimethyl ketone) and a specially designed cold trap have been found effective in removing the particulate (i.e., solid) Hg[sub 2]Cl[sub 2] contaminant. The present invention is particularly directed to such filtering. 5 figures.

Grossman, M.W.; Speer, R.; George, W.A.

1991-07-16T23:59:59.000Z

122

PUBLIC HEALTH STATEMENT MERCURY  

E-Print Network (OSTI)

This Public Health Statement is the summary chapter from the Toxicological Profile for Mercury. It is one in a series of Public Health Statements about hazardous substances and their health effects. A shorter version, the ToxFAQs™, is also available. This information is important because this substance may harm you. The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are

unknown authors

1999-01-01T23:59:59.000Z

123

Method for mercury refinement  

DOE Patents (OSTI)

The effluent from mercury collected during the photochemical separation of the [sup 196]Hg isotope is often contaminated with particulate mercurous chloride, Hg[sub 2]Cl[sub 2]. The use of mechanical filtering via thin glass tubes, ultrasonic rinsing with acetone (dimethyl ketone) and a specially designed cold trap have been found effective in removing the particulate (i.e., solid) Hg[sub 2]Cl[sub 2] contaminant. The present invention is particularly directed to such filtering. 5 figures.

Grossman, M.W.; Speer, R.; George, W.A.

1991-04-09T23:59:59.000Z

124

Mercury Emissions Data Analyses  

Science Conference Proceedings (OSTI)

This report contains the visual materials included in presentations given at Research Triangle Park, North Carolina on April 3, 2002. Participants included representatives from EPRI, DOE, RMB Consulting & Research, and EERC. The MACT Working Group gave a presentation on "Variability in Hg Emissions Based on SCEM Data." The visuals in the report are a set of graphs documenting results of mercury emissions over time, using semi-continuous emissions monitor (SCEM) data. The EPA Utility Working Group gave a ...

2002-05-02T23:59:59.000Z

125

Method for scavenging mercury  

DOE Patents (OSTI)

Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

Chang, Shih-ger (El Cerrito, CA); Liu, Shou-heng (Kaohsiung, TW); Liu, Zhao-rong (Bejing, CN); Yan, Naiqiang (Burkeley, CA)

2010-07-13T23:59:59.000Z

126

Method for scavenging mercury  

SciTech Connect

Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting of flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

Chang, Shih-Ger (El Cerrito, CA); Liu, Shou-Heng (Kaohsiung, TW); Liu, Zhao-Rong (Beijing, CN); Yan, Naiqiang (Berkeley, CA)

2011-08-30T23:59:59.000Z

127

Method for scavenging mercury  

SciTech Connect

Disclosed herein is a method for removing mercury from a gas stream comprising contacting the gas stream with a getter composition comprising bromine, bromochloride, sulphur bromide, sulphur dichloride or sulphur monochloride and mixtures thereof. In one preferred embodiment the getter composition is adsorbed onto a sorbent. The sorbent may be selected from the group consisting of flyash, limestone, lime, calcium sulphate, calcium sulfite, activated carbon, charcoal, silicate, alumina and mixtures thereof. Preferred is flyash, activated carbon and silica.

Chang, Shih-ger (El Cerrito, CA); Liu, Shou-heng (Kaohsiung, TW); Liu, Zhao-rong (Beijing, CN); Yan, Naiqiang (Berkeley, CA)

2009-01-20T23:59:59.000Z

128

Biogeochemistry of mercury in a river-reservoir system: impact of an inactive chloralkali plant on the Holston River-Cherokee Reservoir, Virginia and Tennessee  

SciTech Connect

Elevated mercury concentrations in fish species from the North Fork of the Holston River were observed in the early 1970's. The source of the mercury was a chloralkali plant which had ceased operation in 1972. Mercury continues to be released to the river from two large (approx. 40-ha) waste disposal ponds at the plant site. This report presents results of a study of the emission of mercury to the environment from the abandoned waste ponds and of the distribution of mercury in water, sediment, and biota of the Holston River-Cherokee Reservoir System in Virginia and eastern Tennessee.

Hildebrand, S. G.; Lindberg, S. E.; Turner, R. R.; Huckabee, J. W.; Strand, R. H.; Lund, J. R.; Andren, A. W.

1980-08-01T23:59:59.000Z

129

Fate of Mercury in FGD Systems: Second Interim Report  

Science Conference Proceedings (OSTI)

This report describes the results of laboratory investigations of the fate of flue gas mercury species in wet flue gas desulfurization (FGD) absorbers that are used for SO2 control in coal-fired power plants. The laboratory investigations were conducted in the latter half of 2004 and in early 2005, and include bench-scale simulations of wet FGD absorbers under a range of operating conditions and fundamental investigations of the kinetics of mercury reactions in FGD liquors. Data collected in the EPA merc...

2005-03-14T23:59:59.000Z

130

Pilot-Scale Evaluation of Mercury Oxidation Across SCR Catalysts  

Science Conference Proceedings (OSTI)

This study evaluated the effects of addition of various acid gas species on the oxidation of elemental mercury across two commercial SCR catalysts in a pilot SCR reactor operating on a slipstream from a Powder River Basin coal-fired power plant. Tests were conducted by the Western Kentucky University (WKU) to evaluate the impact of flue gas constituents (HCl, HF, HBr, HI, SO3, NH3:NO), operating conditions, and catalyst design on mercury oxidation. The results and data were reviewed by Reaction Engineer...

2007-03-29T23:59:59.000Z

131

Gas Mileage of 2001 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

1 Mercury Vehicles 1 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2001 Mercury Cougar 4 cyl, 2.0 L, Manual 5-spd, Regular Gasoline Compare 2001 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 21 City 24 Combined 31 Highway 2001 Mercury Cougar 6 cyl, 2.5 L, Automatic 4-spd, Regular Gasoline Compare 2001 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 18 City 21 Combined 26 Highway 2001 Mercury Cougar 6 cyl, 2.5 L, Manual 5-spd, Regular Gasoline Compare 2001 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 18 City 21 Combined 27 Highway 2001 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 2001 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 16 City 18 Combined 23 Highway 2001 Mercury Mountaineer 2WD 6 cyl, 4.0 L, Automatic 5-spd, Regular Gasoline

132

Gas Mileage of 1998 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

8 Mercury Vehicles 8 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1998 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1998 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 22 Highway 1998 Mercury Mountaineer 2WD 6 cyl, 4.0 L, Automatic 5-spd, Regular Gasoline Compare 1998 Mercury Mountaineer 2WD View MPG Estimates Shared By Vehicle Owners 14 City 16 Combined 18 Highway 1998 Mercury Mountaineer 2WD 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1998 Mercury Mountaineer 2WD 12 City 14 Combined 17 Highway 1998 Mercury Mountaineer 4WD 6 cyl, 4.0 L, Automatic 5-spd, Regular Gasoline Compare 1998 Mercury Mountaineer 4WD View MPG Estimates Shared By Vehicle Owners 14 City 15 Combined 18 Highway 1998 Mercury Mountaineer 4WD 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline

133

Gas Mileage of 2005 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

5 Mercury Vehicles 5 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2005 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 2005 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 16 City 19 Combined 23 Highway 2005 Mercury Mariner 2WD 4 cyl, 2.3 L, Automatic 4-spd, Regular Gasoline Compare 2005 Mercury Mariner 2WD View MPG Estimates Shared By Vehicle Owners 19 City 21 Combined 24 Highway 2005 Mercury Mariner 2WD 6 cyl, 3.0 L, Automatic 4-spd, Regular Gasoline Compare 2005 Mercury Mariner 2WD View MPG Estimates Shared By Vehicle Owners 17 City 19 Combined 23 Highway 2005 Mercury Mariner 4WD 4 cyl, 2.3 L, Automatic 4-spd, Regular Gasoline Compare 2005 Mercury Mariner 4WD 17 City 19 Combined 21 Highway 2005 Mercury Mariner 4WD 6 cyl, 3.0 L, Automatic 4-spd, Regular Gasoline

134

Gas Mileage of 2000 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

2000 Mercury Vehicles 2000 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2000 Mercury Cougar 4 cyl, 2.0 L, Manual 5-spd, Regular Gasoline Compare 2000 Mercury Cougar 21 City 25 Combined 31 Highway 2000 Mercury Cougar 6 cyl, 2.5 L, Automatic 4-spd, Regular Gasoline Compare 2000 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 18 City 21 Combined 26 Highway 2000 Mercury Cougar 6 cyl, 2.5 L, Manual 5-spd, Regular Gasoline Compare 2000 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 18 City 21 Combined 26 Highway 2000 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 2000 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 16 City 18 Combined 23 Highway 2000 Mercury Mountaineer 2WD 6 cyl, 4.0 L, Automatic 5-spd, Regular Gasoline

135

Gas Mileage of 2004 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

4 Mercury Vehicles 4 Mercury Vehicles EPA MPG MODEL City Comb Hwy 2004 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 2004 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 2004 Mercury Marauder 8 cyl, 4.6 L, Automatic 4-spd, Premium Gasoline Compare 2004 Mercury Marauder View MPG Estimates Shared By Vehicle Owners 15 City 17 Combined 21 Highway 2004 Mercury Monterey Wagon FWD 6 cyl, 4.2 L, Automatic 4-spd, Regular Gasoline Compare 2004 Mercury Monterey Wagon FWD View MPG Estimates Shared By Vehicle Owners 15 City 17 Combined 21 Highway 2004 Mercury Mountaineer 2WD 8 cyl, 4.6 L, Automatic 5-spd, Regular Gasoline Compare 2004 Mercury Mountaineer 2WD 13 City 15 Combined 18 Highway 2004 Mercury Mountaineer 2WD 6 cyl, 4.0 L, Automatic 5-spd, Regular Gasoline

136

Gas Mileage of 1997 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

7 Mercury Vehicles 7 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1997 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1997 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 16 City 19 Combined 24 Highway 1997 Mercury Cougar 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1997 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 1997 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1997 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 1997 Mercury Mountaineer 2WD 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline Compare 1997 Mercury Mountaineer 2WD View MPG Estimates Shared By Vehicle Owners 12 City 14 Combined 17 Highway 1997 Mercury Mountaineer 4WD 8 cyl, 5.0 L, Automatic 4-spd, Regular Gasoline

137

Gas Mileage of 1995 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

5 Mercury Vehicles 5 Mercury Vehicles EPA MPG MODEL City Comb Hwy 1995 Mercury Cougar 6 cyl, 3.8 L, Automatic 4-spd, Regular Gasoline Compare 1995 Mercury Cougar 17 City 19 Combined 24 Highway 1995 Mercury Cougar 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1995 Mercury Cougar View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 1995 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gasoline Compare 1995 Mercury Grand Marquis View MPG Estimates Shared By Vehicle Owners 15 City 18 Combined 23 Highway 1995 Mercury Mystique 4 cyl, 2.0 L, Automatic 4-spd, Regular Gasoline Compare 1995 Mercury Mystique View MPG Estimates Shared By Vehicle Owners 21 City 24 Combined 29 Highway 1995 Mercury Mystique 6 cyl, 2.5 L, Automatic 4-spd, Regular Gasoline

138

NETL: Mercury Emissions Control Technologies - Pilot Testing of Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Testing of Mercury Oxidation Catalysts Project Summary Testing of Mercury Oxidation Catalysts Project Summary URS Group, Inc., Austin, TX, will demonstrate at the pilot scale the use of solid honeycomb catalysts to promote the oxidation of elemental mercury in the flue gas from coal combustion, and the use of a wet flue gas desulfurization (FGD) system downstream to remove the oxidized mercury at high efficiency. The project's pilot tests, conducted at electric generating plants using wet flue gas desulfurization systems and particulate collection systems, will be conducted for periods up to 14 months to provide data for future, full-scale designs. Mercury-oxidation potential will be measured periodically to provide long-term catalyst life data. The project is applicable to about 90,000 megawatts of generation capacity. Project partners are the Electric Power Research Institute, Palo Alto, CA, which will co-manage and co-fund the pilot tests, and five utilities.

139

NETL: Mercury Emissions Control Technologies - Evaluation of Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Control Technology Evaluation of Mercury Emissions from Coal-Fired Facilities w/ SCR and FGD Systems Control Technology Evaluation of Mercury Emissions from Coal-Fired Facilities w/ SCR and FGD Systems CONSOL is evaluating the mercury removal co-benefits achieved by SCR-FGD combi nations. Specific issues that will be addressed include the effects of SCR, catalyst degradation, and load changes on mercury oxidation and capture. This objective will be achieved by measuring mercury removal achieved by SCR-FGD combinations at ten plants with such equipment configurations. These plants include five with wet limestone, three wet lime, and two with dry scrubbing. Material balance will be conducted. Related Papers and Publications: Final Report - April 2006 [PDF-377KB] Topical Report # 11 - January 2006 [PDF-19MB] Topical Report # 9 - January 2006 [PDF-6MB]

140

Mercury reduction studies to facilitate the thermal decontamination of phosphor powder residues from spent fluorescent lamps  

SciTech Connect

This work investigates the thermal release of mercury from phosphor powder of spent fluorescent lamps. The treatment conditions and the ability of various reducing agents (primarily sodium borohydride) to lower the overall heating temperature required to improve the release of Hg have been evaluated. Hg species in samples were monitored in a thermal desorption atomic absorption spectrometer system, and total mercury was analyzed in a cold vapor atomic absorption spectrometer. Sodium borohydride was the best reducing agent among the ones studied. However, citric acid presented a high capacity to weaken mercury bonds with the matrix. When the sample was crushed with sodium borohydride for 40 min in a mass ratio of 10:1 (sample:reducing agent) and submitted to thermal treatment at 300 deg. C for 2 h, the concentration of mercury in a phosphor powder sample with 103 mg kg{sup -1} of mercury reached 6.6 mg kg{sup -1}.

Alves Durao, Walter [Chemistry Department, Federal University of Minas Gerais (UFMG), Cidade Universitaria 30.123-970 Belo Horizonte, MG (Brazil); Andreva de Castro, Camila [Chemistry Engineering Department, Federal University of Minas Gerais (UFMG) (Brazil); Carvalhinho Windmoeller, Claudia [Chemistry Department, Federal University of Minas Gerais (UFMG), Cidade Universitaria 30.123-970 Belo Horizonte, MG (Brazil)], E-mail: claucw@netuno.lcc.ufmg.br

2008-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Catalyst Additives to Enhance Mercury Oxidation and Capture  

SciTech Connect

Preliminary research has shown that SCR catalysts employed for nitrogen-oxide reduction can effectively oxidize mercury. This report discusses initial results from fundamental investigations into the behavior of mercury species in the presence of SCR catalysts at Southern Research Institute. The testing was performed at Southern Research's Catalyst Test Facility, a bench-scale reactor capable of simulating gas-phase reactions occurring in coal-fired utility pollution-control equipment. Three different SCR catalysts are currently being studied in this project - honeycomb-type, plate-type, and a hybrid-type catalyst. The catalysts were manufactured and supplied by Cormetech Inc., Hitachi America Ltd., and Haldor-Topsoe Inc., respectively. Parametric testing was performed to investigate the contribution of flue-gas chemistry on mercury oxidation via SCR catalysts. Methods and procedures for experimental testing continue to be developed to produce the highest quality mercury-oxidation data. Most experiments so far have focused on testing the catalysts in a simulated Powder River Basin (PRB) flue-gas environment, which contains lower sulfur and chlorine than produced by other coals. Future work to characterize flue gas simulations typically derived from low and high sulfur bituminous coal will be performed in a stepwise manner, to avoid the constant interruptions in testing that occur when leaks in the system are generated during temperature transitions. Specifically, chlorine concentration vs. mercury oxidation graph will be developed for each catalyst. The contributions of temperature and later sulfur will be investigated after this is complete. Also, last quarter's tests showed a potential linear relationship between SO3 conversion and mercury oxidation. As a result, SO3 samples will be taken more frequently to investigate each catalyst's ability to selectively oxidize mercury.

Alex J. Berry; Thomas K. Gale

2005-09-30T23:59:59.000Z

142

The Clean Air Mercury Rule  

SciTech Connect

Coming into force on July 15, 2005, the US Clean Air Mercury Rule will use a market-based cap-and-trade approach under Section 111 of the Clean Air Act to reduce mercury emissions from the electric power sector. This article provides a comprehensive summary of the new rule. 14 refs., 2 tabs.

Michael Rossler [Edison Electric Institute, Washington, DC (US)

2005-07-01T23:59:59.000Z

143

The removal of mercury from solid mixed waste using chemical leaching processes  

Science Conference Proceedings (OSTI)

The focus of this research was to evaluate chemical leaching as a technique to treat soils, sediments, and glass contaminated with either elemental mercury or a combination of several mercury species. Potassium iodide/iodine solutions were investigated as chemical leaching agents for contaminated soils and sediments. Clean, synthetic soil material and surrogate storm sewer sediments contaminated with mercury were treated with KI/I{sub 2} solutions. It was observed that these leaching solutions could reduce the mercury concentration in soil and sediments by 99.8%. Evaluation of selected posttreatment sediment samples revealed that leachable mercury levels in the treated solids exceeded RCRA requirements. The results of these studies suggest that KI/I{sub 2} leaching is a treatment process that can be used to remove large quantities of mercury from contaminated soils and sediments and may be the only treatment required if treatment goals are established on Hg residual concentrations in solid matrices. Fluorescent bulbs were used to simulate mercury contaminated glass mixed waste. To achieve mercury contamination levels similar to those found in larger bulbs such as those used in DOE facilities a small amount of Hg was added to the crushed bulbs. The most effective agents for leaching mercury from the crushed fluorescent bulbs were KI/I{sub 2}, NaOCl, and NaBr + acid. Radionuclide surrogates were added to both the EPA synthetic soil material and the crushed fluorescent bulbs to determine the fate of radionuclides following chemical leaching with the leaching agents determined to be the most promising. These experiments revealed that although over 98% of the dosed mercury solubilized and was found in the leaching solution, no Cerium was measured in the posttreatment leaching solution. This finding suggest that Uranium, for which Ce was used as a surrogate, would not solubilize during leaching of mercury contaminated soil or glass.

Gates, D.D.; Chao, K.K.; Cameron, P.A.

1995-07-01T23:59:59.000Z

144

Methods for dispensing mercury into devices  

DOE Patents (OSTI)

A process for dispensing mercury into devices which requires mercury. Mercury is first electrolytically separated from either HgO or Hg.sub.2 Cl.sub.2 and plated onto a cathode wire. The cathode wire is then placed into a device requiring mercury.

Grossman, Mark W. (Belmont, MA); George, William A. (Rockport, MA)

1987-04-28T23:59:59.000Z

145

Methods for dispensing mercury into devices  

DOE Patents (OSTI)

A process is described for dispensing mercury into devices which requires mercury. Mercury is first electrolytically separated from either HgO or Hg[sub 2]Cl[sub 2] and plated onto a cathode wire. The cathode wire is then placed into a device requiring mercury. 2 figs.

Grossman, M.W.; George, W.A.

1987-04-28T23:59:59.000Z

146

Recovery from Mercury Contamination in the Second Songhua River, China  

E-Print Network (OSTI)

K. , & Rubin, J. R. (2005). Mercury levels and relationshipsJ. , et al. (1999). Mercury in contaminated coastalEnvironmental costs of mercury pollution. Science of the

Zhang, Z. S.; Sun, X. J.; Wang, Q. C.; Zheng, D. M.; Zheng, N.; Lv, X. G.

2010-01-01T23:59:59.000Z

147

Mercury Isotope Fractionation by Environmental Transport and Transformation Processes  

E-Print Network (OSTI)

measurements of atomic mercury. Applied Physics B, 87(2),M. & Covelli, S. , 2000. Mercury speciation in sedimentsarea of the Idrija mercury mine, Slovenia. Environmental

Koster van Groos, Paul Gijsbert

2011-01-01T23:59:59.000Z

148

NETL: Health Effects - Risk Assessment of Reduced Mercury Emissions...  

NLE Websites -- All DOE Office Websites (Extended Search)

of mercury. The primary pathway for mercury exposure is through consumption of fish. The most susceptible population to mercury exposure is the fetus. Therefore, the risk...

149

Mercury Vapor (Kooten, 1987) | Open Energy Information  

Open Energy Info (EERE)

Mercury Vapor (Kooten, 1987) Mercury Vapor (Kooten, 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor (Kooten, 1987) Exploration Activity Details Location Unspecified Exploration Technique Mercury Vapor Activity Date Usefulness useful DOE-funding Unknown Notes Surface soil-mercury surveys are an inexpensive and useful exploration tool for geothermal resources. ---- Surface geochemical surveys for mercury were conducted in 16 areas in 1979-1981 by ARCO Oil and Gas Company as part of its geothermal evaluation program. Three techniques used together have proved satisfactory in evaluating surface mercury data. These are contouring, histograms and cumulative frequency plots of the data. Contouring geochemical data and constructing histograms are standard

150

Fluorescent sensor for mercury  

DOE Patents (OSTI)

The present invention provides a sensor for detecting mercury, comprising: a first polynucleotide, comprising a first region, and a second region, a second polynucleotide, a third polynucleotide, a fluorophore, and a quencher, wherein the third polynucleotide is optionally linked to the second region; the fluorophore is linked to the first polynucleotide and the quencher is linked to the second polynucleotide, or the fluorophore is linked to the second polynucleotide and the quencher is linked to the first polynucleotide; the first region and the second region hybridize to the second polynucleotide; and the second region binds to the third polynucleotide in the presence of Hg.sup.2+ ions.

Wang, Zidong (Urbana, IL); Lee, Jung Heon (Evanston, IL); Lu, Yi (Champaign, IL)

2011-11-22T23:59:59.000Z

151

Mercury reduction and complexation by natural organic matter  

Science Conference Proceedings (OSTI)

Mercuric Hg(II) species form complexes with natural dissolved organic matter (DOM) such as humic acid (HA), and this binding is known to affect the chemical and biological transformation and cycling of mercury in aquatic environments. Dissolved elemental mercury, Hg(0), is also widely observed in sediments and water. However, reactions between Hg(0) and DOM have rarely been studied in anoxic environments. Here, under anoxic dark conditions we show strong interactions between reduced HA and Hg(0) through thiol-ligand induced oxidative complexation with an estimated binding capacity of about 3.5 umol Hg(0)/g HA and a partitioning coefficient greater than 10^6 mL/g. We further demonstrate that Hg(II) can be effectively reduced to Hg(0) in the presence of as little as 0.2 mg/L reduced HA, whereas production of purgeable Hg(0) is inhibited by complexation as HA concentration increases. This dual role played by DOM in the reduction and complexation of mercury is likely widespread in anoxic sediments and water and can be expected to significantly influence the mercury species transformations and biological uptake that leads to the formation of toxic methylmercury.

Gu, Baohua [ORNL; Bian, Yongrong [ORNL; Miller, Carrie L [ORNL; Dong, Wenming [ORNL; Jiang, Xin [Institute of Soil Science, China; Liang, Liyuan [ORNL

2011-01-01T23:59:59.000Z

152

Ambiental PV | Open Energy Information  

Open Energy Info (EERE)

Ambiental PV Ambiental PV Jump to: navigation, search Name Ambiental PV Place Bahia, Brazil Zip 40140-380 Sector Carbon Product Bahia-based carbon consultancy firm. References Ambiental PV[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Ambiental PV is a company located in Bahia, Brazil . References ↑ "Ambiental PV" Retrieved from "http://en.openei.org/w/index.php?title=Ambiental_PV&oldid=342095" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 186306960

153

Imaging with ambient noise  

Science Conference Proceedings (OSTI)

Recent developments in seismology, ultrasonics, and underwater acoustics have led to a radical change in the way scientists think about ambient noise--the diffuse waves generated by pressure fluctuations in the atmosphere, the scattering of water waves in the ocean, and any number of other sources that pervade our world. Because diffuse waves consist of the superposition of waves propagating in all directions, they appear to be chaotic and random. That appearance notwithstanding, diffuse waves carry information about the medium through which they propagate.

Snieder, Roel; Wapenaar, Kees [Colorado School of Mines, Golden (United States); Delft University of Technology, Delft (Netherlands)

2010-09-15T23:59:59.000Z

154

NETL: Mercury Emissions Control Technologies - Testing of Mercury Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Testing of Mercury Control with Calcium-Based Sorbents and Oxidizing Agents Testing of Mercury Control with Calcium-Based Sorbents and Oxidizing Agents Southern Research Institute, Birmingham, Alabama Subcontractor- ARCADIS Geraghty & Miller The overall goal of this project is to test the effectiveness of calcium-based sorbents and oxidizing agents for controlling mercury emissions from coal-fired power plant boilers. ARCADIS Geraghty & Miller, with EPA support, has developed calcium-based sorbents to remove SO2 and mercury simultaneously. The sorbents consist of hydrated lime (Ca(OH)2) and an added oxidant and a silica-modified calcium (CaSiO3) with an added oxidant. The mercury capacity in ug Hg/g sorbent for the two sorbents is 20 and 110-150, respectively, verses a mercury capacity for the current standard sorbent, activated carbon, of 70-100. The advantages of a lime based sorbent verses carbon is lower cost, simultaneous removal of sulfur, and allowance of ash to be utilized for a cement additive.

155

Discovery of the Mercury Isotopes  

E-Print Network (OSTI)

Forty mercury isotopes have so far been observed; the discovery of these isotopes is discussed. For each isotope a brief summary of the first refereed publication, including the production and identification method, is presented.

D. Meierfrankenfeld; M. Thoennessen

2009-12-01T23:59:59.000Z

156

Mercury Atomic Clock Sets Time-Keeping Record  

Science Conference Proceedings (OSTI)

Mercury Atomic Clock Sets Time-Keeping Record. ... A prototype mercury optical clock originally was demonstrated at NIST in 2000. ...

2013-08-27T23:59:59.000Z

157

Mercury Control Technology Selection Guide  

Science Conference Proceedings (OSTI)

EPRI, the DOE National Energy Technology Laboratory, and various other organizations have undertaken extensive RD programs over the past decade to develop cost-effective methods for reducing mercury emissions from coal-burning power plants. The field tests sponsored by these organizations have produced a significant amount of pilot and full-scale mercury control data for a variety of technologies at power plant sites with different boiler types, firing different coals, and equipped with various air emiss...

2006-09-22T23:59:59.000Z

158

Mercury Stability in FGD Byproducts  

Science Conference Proceedings (OSTI)

A significant fraction of the mercury in coals fired for power generation currently is removed by wet flue gas desulfurization (FGD) systems and incorporated in the byproducts from those systems. This report summarizes the results of an EPRI-sponsored project to measure the stability of mercury in FGD byproducts from coal-fired generating plants under simulated landfill and reuse conditions. The current effort repeated portions of a 2003 project, documented in EPRI report 1004254, to determine whether th...

2004-03-24T23:59:59.000Z

159

National Ambient Radiation Database  

Science Conference Proceedings (OSTI)

The U.S. Environmental Protection Agency (EPA) recently developed a searchable database and website for the Environmental Radiation Ambient Monitoring System (ERAMS) data. This site contains nationwide radiation monitoring data for air particulates, precipitation, drinking water, surface water and pasteurized milk. This site provides location-specific as well as national information on environmental radioactivity across several media. It provides high quality data for assessing public exposure and environmental impacts resulting from nuclear emergencies and provides baseline data during routine conditions. The database and website are accessible at www.epa.gov/enviro/. This site contains (1) a query for the general public which is easy to use--limits the amount of information provided, but includes the ability to graph the data with risk benchmarks and (2) a query for a more technical user which allows access to all of the data in the database, (3) background information on ER AMS.

Dziuban, J.; Sears, R.

2003-02-25T23:59:59.000Z

160

Correlations Between Gene Expression and Mercury Levels in Blood of Boys With and Without Autism  

E-Print Network (OSTI)

AJ (2005) Inorganic mercury dissociates preassembledmetabolize toxicants, such as mercury, differently. RNA wasexpression microarrays. Mercury levels were measured using

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Ambient Corp | Open Energy Information  

Open Energy Info (EERE)

Corp Place Newton, Massachusetts Zip 24580 Product Ambient develops open standards-based technologies for creating smart grid communication platforms and technologies. References...

162

Catalyst Additives to Enhance Mercury Oxidation and Capture  

SciTech Connect

Preliminary research has shown that SCR catalysts employed for nitrogen-oxide reduction can effectively oxidize mercury. This report discusses initial results from fundamental investigations into the behavior of mercury species in the presence of SCR catalysts at Southern Research Institute. The testing was performed at Southern Research's Catalyst Test Facility, a bench-scale reactor capable of simulating gas-phase reactions occurring in coal-fired utility pollution-control equipment. Three different SCR catalysts are currently being studied in this project--honeycomb-type, plate-type, and a hybrid-type catalyst. The catalysts were manufactured and supplied by Cormetech Inc., Hitachi America Ltd., and Haldor-Topsoe Inc., respectively. Parametric testing was performed to investigate the contribution of flue-gas chemistry on mercury oxidation via SCR catalysts. Methods and procedures for experimental testing continue to be developed to produce the highest quality mercury-oxidation data. During this past quarter, it was discovered that long periods (12 - 24 hours) are required to equilibrate the catalysts in the system. In addition, after the system has been equilibrated, operational changes to temperature, gas concentration, or flow rate shifts the equilibrium, and steady-state must be reestablished, which can require as much as twelve additional hours per condition change. In the last quarter of testing, it was shown that the inclusion of ammonia had a strong effect on the oxidation of mercury by SCR catalysts, both in the short-term (a transitional period of elemental and oxidized mercury off gassing) and the long-term (less steady-state mercury oxidation). All experiments so far have focused on testing the catalysts in a simulated Powder River Basin (PRB) flue-gas environment, which contains lower sulfur and chlorine than produced by other coals. In the next quarter, parametric testing will be expanded to include flue gases simulating power plants burning Midwestern and Eastern coals, which are higher in sulfur and chlorine. Also, the isolation of such gases as hydrogen chloride (HCl), ammonia (NH{sub 3}), and sulfur trioxide (SO{sub 3}) will be investigated. All of these efforts will be used to examine the kinetics of mercury oxidation across the SCR catalysts with respect to flue gas composition, temperature, and flow rate.

Jared W. Cannon; Thomas K. Gale

2005-06-30T23:59:59.000Z

163

Mercury Contamination in Pelagic Fishes of the Gulf of Mexico  

E-Print Network (OSTI)

Knowledge of mercury concentrations in fish is essential for human health protection. Mercury is a naturally occurring element that acts as a neurotoxin to humans and other species. The biologically available mercury form, methylmercury (MeHg), bio accumulates from small benthic invertebrates to large pelagic fish, and therefore high end consumers and terminal predators have elevated Hg concentrations. The main pathway of MeHg exposure in humans is by consumption of contaminated fish. In this study total Hg concentrations were measured in 10 Gulf of Mexico pelagic fish species using a DMA 80 analyzer. Total Hg concentrations ranged from 0.004 to 3.55 ppm (wet wt). The highest mean concentration (1.04 ppm, wet wt) recorded in king mackerel (Scomberomorus cavalla) exceeded FDA recommended criteria of 1ppm. Dolphinfish (Coryphaena hippurus) and vermilion snapper (Rhomboplites aurorubens) had lowest mean Hg concentrations (tuna (Thunnus atlanticus) and yellowfin tuna (Thunnus albacores) had moderate Hg concentrations (0.39 and 0.36 ppm wet wt respectively). Little tunny (Euthynnus alletteratus) and blacktip shark (Carcharhinus limbatus) had mean concentrations of 0.69 and 0.51 ppm respectively. The relationship between fish length and Hg concentrations was significant for four species.

Kuklyte, Ligita

2012-08-01T23:59:59.000Z

164

NETL: Mercury Emissions Control Technologies - Mercury Control For Plants  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Control For Plants Firing Texas Lignite and Equipped with ESP-wet FGD Mercury Control For Plants Firing Texas Lignite and Equipped with ESP-wet FGD URS Group, Inc., in collaboration with EPRI, Apogee Scientific, AEP, Texas Genco, and TXU Power, ADA-ES, will evaluate sorbent injection for mercury control in an 85/15 blend Texas lignite/PRB derived flue gas, upstream of a cold-side ESP – wet FGD combination. Full-scale sorbent injection tests conducted with various sorbents and combinations of fuel and plant air pollution control devices (APCD) have provided a good understanding of variables that affect sorbent performance. However, many uncertainties exist regarding long-term performance and data gaps remain for specific plant configurations. For example, sorbent injection has not been demonstrated at full-scale for plants firing Texas lignite, which represent approximately 10% of the annual U.S. power plant mercury emissions. The low and variable chloride content of Texas lignite may pose a challenge to achieving high levels of mercury removal with sorbent injection. Furthermore, activated carbon injection may render the fly ash unsuitable for sale, posing an economic liability to Texas lignite utilities. Alternatives to standard activated carbon, such as non-carbon sorbents and alternate injection locations (Toxecon II), have not been fully explored. Toxecon II involves sorbent injection in the middle field(s) of an ESP, thus preserving the integrity of the fly ash in the first fields.

165

Mercury switch with non-wettable electrodes  

DOE Patents (OSTI)

A mercury switch device comprising a pool of mercury and a plurality of electrical contacts made of or coated with a non-wettable material such as titanium diboride.

Karnowsky, M.M.; Yost, F.G.

1986-04-09T23:59:59.000Z

166

Mercury switch with non-wettable electrodes  

DOE Patents (OSTI)

A mercury switch device comprising a pool of mercury and a plurality of electrical contacts made of or coated with a non-wettable material such as titanium diboride.

Karnowsky, Maurice M. (Albulquerque, NM); Yost, Frederick G. (Carlsbad, NM)

1987-01-01T23:59:59.000Z

167

Gas Mileage of 2009 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Comb Hwy 2009 Mercury Grand Marquis FFV 8 cyl, 4.6 L, Automatic 4-spd, Regular Gas or E85 Compare 2009 Mercury Grand Marquis FFV Gas 16 City 19 Combined 24 Highway E85 12 City...

168

Gas Mileage of 2010 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Comb Hwy 2010 Mercury Grand Marquis FFV 8 cyl, 4.6 L, Automatic 4-spd, Regular Gas or E85 Compare 2010 Mercury Grand Marquis FFV View MPG Estimates Shared By Vehicle Owners Gas...

169

Gas Mileage of 2011 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Comb Hwy 2011 Mercury Grand Marquis FFV 8 cyl, 4.6 L, Automatic 4-spd, Regular Gas or E85 Compare 2011 Mercury Grand Marquis FFV View MPG Estimates Shared By Vehicle Owners Gas...

170

Gas Mileage of 2003 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

Highway 2003 Mercury Mountaineer 2WD FFV 6 cyl, 4.0 L, Automatic 5-spd, Regular Gas or E85 Compare 2003 Mercury Mountaineer 2WD FFV Gas 14 City 16 Combined 19 Highway E85 10 City...

171

Mercury Solar Systems | Open Energy Information  

Open Energy Info (EERE)

OpenEI by expanding it. Mercury Solar Systems is a company located in New Rochelle, New York . References "Mercury Solar Systems" Retrieved from "http:en.openei.orgw...

172

NETL: Emissions Characterization - Mercury Reactions in Power...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Reactions in Power Plant Plumes: Bowen Study DOE-NETL is participating in a field study, managed by EPRI, to document the changes in mercury speciation that may be...

173

Gas Mileage of 2006 Vehicles by Mercury  

NLE Websites -- All DOE Office Websites (Extended Search)

23 Highway 2006 Mercury Grand Marquis 8 cyl, 4.6 L, Automatic 4-spd, Regular Gas or E85 Compare 2006 Mercury Grand Marquis Gas 15 City 18 Combined 23 Highway E85 11 City 13...

174

Content and chemical form of mercury and selenium in Lake Ontario salmon and trout  

SciTech Connect

The content and chemical form of mercury and selenium were determined in the edible tissue of salmon (coho, chinook) and trout (lake, brown) taken offshore from Lake Ontario near Rochester, New York. For all species, total mercury content ranged from 0.3 to 0.8 micro g/g (fresh-weight), which is similar to concentrations commonly found in canned tuna. Most of the total mercury (63 to 79%) was present as methylmercury, the remainder being divalent inorganic mercury. For all species, 6 to 45% of the total selenium content was present as selenate (SeVI), the remainder being selenite (SeIV) and selenide (SEII). On a molar basis, total selenium content usually exceeded that of total mercury. Samples of smoked and unsmoked brown trout fillets were also examined. Based on the results of this study there is no immediate human health hazard from mercury and selenium. However, there is a need to report specific forms of these metals in Lake Ontario salmonid fish so that elevated concentrations can be better evaluated. 42 references, 1 figure, 4 tables.

Cappon, C.J.

1984-01-01T23:59:59.000Z

175

Method for the removal and recovery of mercury  

DOE Patents (OSTI)

The present invention is an enhanced method for the removal and recovery of mercury from mercury-contaminated matrices. The method involves contacting a mercury-contaminated matrix with an aqueous dispersant solution derived from specific intra-amoebic isolates to release the mercury from the mercury-contaminated matrix and emulsify the mercury; then, contacting the matrix with an amalgamating metal from a metal source to amalgamate the mercury to the amalgamating metal; removing the metallic source from the mercury-contaminated matrix; and heating the metallic source to vaporize the mercury in a closed system to capture the mercury vapors.

Easterly, C.E.; Vass, A.A.; Tyndall, R.L.

1997-01-28T23:59:59.000Z

176

Method for the removal and recovery of mercury  

DOE Patents (OSTI)

The present invention is an enhanced method for the removal and recovery of mercury from mercury-contaminated matrices. The method involves contacting a mercury-contaminated matrix with an aqueous dispersant solution derived from specific intra-amoebic isolates to release the mercury from the mercury-contaminated matrix and emulsify the mercury; then, contacting the matrix with an amalgamating metal from a metal source to amalgamate the mercury to the amalgamating metal; removing the metallic source from the mercury-contaminated matrix; and heating the metallic source to vaporize the mercury in a closed system to capture the mercury vapors.

Easterly, Clay E. (Knoxville, TN); Vass, Arpad A. (Oak Ridge, TN); Tyndall, Richard L. (Clinton, TN)

1997-01-01T23:59:59.000Z

177

Mercury Oxidation Performance of Advanced SCR Catalyst  

Science Conference Proceedings (OSTI)

The ability of selective catalytic reduction (SCR) catalysts to oxidize mercury is an important aspect of many utilities’ mercury control strategies. Improved SCR mercury oxidation will facilitate its capture in downstream wet–flue gas desulfurization systems and will generally result in lower emission rates. Recently, catalyst manufacturers have attempted to maximize mercury oxidation through advanced catalyst formulations.This study documents the performance of an advanced ...

2012-12-31T23:59:59.000Z

178

Transitioning from Mercury Thermometers to Alternative ...  

Science Conference Proceedings (OSTI)

... methods in the petroleum industry continue to specify mercury- in-glass thermometers. ... Thermometers are available from many commercial sources ...

2013-06-03T23:59:59.000Z

179

Emissions, Monitoring, and Control of Mercury from Subbituminous Coal-Fired Power Plants - Phase II  

SciTech Connect

Western Research Institute (WRI), in conjunction with Western Farmers Electric Cooperative (WFEC), has teamed with Clean Air Engineering of Pittsburgh PA to conduct a mercury monitoring program at the WEFC Hugo plant in Oklahoma. Sponsored by US Department of Energy Cooperative Agreement DE-FC-26-98FT40323, the program included the following members of the Subbituminous Energy Coalition (SEC) as co-sponsors: Missouri Basin Power Project; DTE Energy; Entergy; Grand River Dam Authority; and Nebraska Public Power District. This research effort had five objectives: (1) determine the mass balance of mercury for subbituminous coal-fired power plant; (2) assess the distribution of mercury species in the flue gas (3) perform a comparison of three different Hg test methods; (4) investigate the long-term (six months) mercury variability at a subbituminous coal-fired power plant; and (5) assess operation and maintenance of the Method 324 and Horiba CEMS utilizing plant personnel.

Alan Bland; Jesse Newcomer; Allen Kephart; Volker Schmidt; Gerald Butcher

2008-10-31T23:59:59.000Z

180

Mercury Flux Measurements: An Intercomparison and Assessment: Nevada Mercury Emissions Project (NvMEP)  

Science Conference Proceedings (OSTI)

An understanding of the contribution of natural nonpoint mercury sources to regional and global atmospheric mercury pools is critical for developing emission inventories, formulating environmental regulations, and assessing human and ecological health risks. This report discusses the results of the Nevada Mercury Emissions Project (NvMEP) and takes a close look at the emerging technologies used to obtain mercury flux field data. In specific, it provides an intercomparison of mercury flux measurements obt...

1998-12-14T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Mercury Continuous Emmission Monitor Calibration  

SciTech Connect

Mercury continuous emissions monitoring systems (CEMs) are being implemented in over 800 coal-fired power plant stacks throughput the U.S. Western Research Institute (WRI) is working closely with the Electric Power Research Institute (EPRI), the National Institute of Standards and Technology (NIST), and the Environmental Protection Agency (EPA) to facilitate the development of the experimental criteria for a NIST traceability protocol for dynamic elemental mercury vapor calibrators/generators. These devices are used to calibrate mercury CEMs at power plant sites. The Clean Air Mercury Rule (CAMR) which was published in the Federal Register on May 18, 2005 and vacated by a Federal appeals court in early 2008 required that calibration be performed with NIST-traceable standards. Despite the vacature, mercury emissions regulations in the future will require NIST traceable calibration standards, and EPA does not want to interrupt the effort towards developing NIST traceability protocols. The traceability procedures will be defined by EPA. An initial draft traceability protocol was issued by EPA in May 2007 for comment. In August 2007, EPA issued a conceptual interim traceability protocol for elemental mercury calibrators. The protocol is based on the actual analysis of the output of each calibration unit at several concentration levels ranging initially from about 2-40 {micro}g/m{sup 3} elemental mercury, and in the future down to 0.2 {micro}g/m{sup 3}, and this analysis will be directly traceable to analyses by NIST. The EPA traceability protocol document is divided into two separate sections. The first deals with the qualification of calibrator models by the vendors for use in mercury CEM calibration. The second describes the procedure that the vendors must use to certify the calibrators that meet the qualification specifications. The NIST traceable certification is performance based, traceable to analysis using isotope dilution inductively coupled plasma/mass spectrometry (ID/ICP/MS) performed by NIST in Gaithersburg, MD. The outputs of mercury calibrators are compared to one another using a nesting procedure which allows direct comparison of one calibrator with another at specific concentrations and eliminates analyzer variability effects. The qualification portion of the EPA interim traceability protocol requires the vendors to define calibrator performance as affected by variables such as pressure, temperature, line voltage, and shipping. In 2007 WRI developed and conducted a series of simplified qualification experiments to determine actual calibrator performance related to the variables defined in the qualification portion of the interim protocol.

John Schabron; Eric Kalberer; Ryan Boysen; William Schuster; Joseph Rovani

2009-03-12T23:59:59.000Z

182

Combined homo- and heterogeneous model for mercury speciation in pulverized fuel combustion flue gases  

SciTech Connect

A new model is developed to predict Hg{sup 0}, Hg{sup +}, Hg{sup 2+}, and Hg{sub p} in the post-combustion zone upstream of a particulate control device (PCD) in pulverized coal-fired power plants. The model incorporates reactions of mercury with chlorinating agents (HCl) and other gaseous species and simultaneous adsorption of oxidized mercury (HgCl{sub 2}) on fly ash particles in the cooling of flue gases. The homogeneous kinetic model from the literature has been revised to understand the effect of the NO + OH + M {longleftrightarrow} HONO + M reaction on mercury oxidation. Because it is a pressure-dependent reaction, the choice of proper reaction rates was very critical. It was found that mercury oxidation reduces from 100 to 0% while going from high- to low-pressure limit rates with 100 ppmv NO. The heterogeneous model describes selective in-duct Langmuir-Hinshelwood adsorption of mercury chloride on ash particles. The heterogeneous model has been built using Fortran and linked to Chemkin 4.0. The final predictions of elemental, oxidized, and particulate mercury were compared to mercury speciation from power plant data. Information collection request (ICR) data were used for this comparison. The model results follow very similar trends compared to those of the plant data; however, quantitative deviation was considerable. These deviations are due to the errors in the measurement of mercury upstream of PCD, lack of adsorption kinetic data, accurate homogeneous reaction mechanisms, and certain modeling assumptions. The model definitely follows a new approach for the prediction of mercury speciation, and further refinement will improve the model significantly. 43 refs., 1 figs., 6 tabs.

Shishir P. Sable; Wiebren de Jong; Hartmut Spliethoff [Delft University Technology, Delft (Netherlands). Section Energy Technology, Department of Process and Energy

2008-01-15T23:59:59.000Z

183

Lumex Mercury CEM  

E-Print Network (OSTI)

Program to facilitate the deployment of innovative or improved environmental technologies through performance verification and dissemination of information. The goal of the ETV Program is to further environmental protection by substantially accelerating the acceptance and use of improved and cost-effective technologies. ETV seeks to achieve this goal by providing high-quality, peer-reviewed data on technology performance to those involved in the design, distribution, financing, permitting, purchase, and use of environmental technologies. ETV works in partnership with recognized standards and testing organizations; with stakeholder groups that consist of buyers, vendor organizations, and permitters; and with the full participation of individual technology developers. The program evaluates the performance of innovative technologies by developing test plans that are responsive to the needs of stakeholders, conducting field or laboratory tests (as appropriate), collecting and analyzing data, and preparing peer-reviewed reports. All evaluations are conducted in accordance with rigorous quality assurance protocols to ensure that data of known and adequate quality are generated and that the results are defensible. The Advanced Monitoring Systems (AMS) Center, one of six technology centers under ETV, is operated by Battelle in cooperation with EPA’s National Exposure Research Laboratory. The AMS Center has recently evaluated the performance of continuous emission monitors used to measure mercury in flue gases. This

unknown authors

2001-01-01T23:59:59.000Z

184

Mixed Waste Integrated Program: A technology assessment for mercury-containing mixed wastes  

SciTech Connect

The treatment of mixed wastes must meet US Environmental Protection Agency (EPA) standards for chemically hazardous species and also must provide adequate control of the radioactive species. The US Department of Energy (DOE) Office of Technology Development established the Mixed Waste Integrated Program (MWIP) to develop mixed-waste treatment technology in support of the Mixed Low-Level Waste Program. Many DOE mixed-waste streams contain mercury. This report is an assessment of current state-of-the-art technologies for mercury separations from solids, liquids, and gases. A total of 19 technologies were assessed. This project is funded through the Chemical-Physical Technology Support Group of the MWIP.

Perona, J.J.; Brown, C.H.

1993-03-01T23:59:59.000Z

185

DFJ Mercury | Open Energy Information  

Open Energy Info (EERE)

DFJ Mercury DFJ Mercury Jump to: navigation, search Name DFJ Mercury Place Houston, Texas Zip 77046 Product Houston-based seed and early-stage venture capital firm that targets the information technology, advanced materials, and bioscience sectors. Coordinates 29.76045°, -95.369784° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":29.76045,"lon":-95.369784,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

186

Emissions, Monitoring and Control of Mercury from Subbituminous Coal-Fired Power Plants  

Science Conference Proceedings (OSTI)

The Subbituminous Energy Coalition (SEC) identified a need to re-test stack gas emissions from power plants that burn subbituminous coal relative to compliance with the EPA mercury control regulations for coal-fired plants. In addition, the SEC has also identified the specialized monitoring needs associated with mercury continuous emissions monitors (CEM). The overall objectives of the program were to develop and demonstrate solutions for the unique emission characteristics found when burning subbituminous coals. The program was executed in two phases; Phase I of the project covered mercury emission testing programs at ten subbituminous coal-fired plants. Phase II compared the performance of continuous emission monitors for mercury at subbituminous coal-fired power plants and is reported separately. Western Research Institute and a number of SEC members have partnered with Eta Energy and Air Pollution Testing to assess the Phase I objective. Results of the mercury (Hg) source sampling at ten power plants burning subbituminous coal concluded Hg emissions measurements from Powder River Basin (PBR) coal-fired units showed large variations during both ICR and SEC testing. Mercury captures across the Air Pollution Control Devices (APCDs) present much more reliable numbers (i.e., the mercury captures across the APCDs are positive numbers as one would expect compared to negative removal across the APCDs for the ICR data). Three of the seven units tested in the SEC study had previously shown negative removals in the ICR testing. The average emission rate is 6.08 lb/TBtu for seven ICR units compared to 5.18 lb/TBtu for ten units in the SEC testing. Out of the ten (10) SEC units, Nelson Dewey Unit 1, burned a subbituminous coal and petcoke blend thus lowering the total emission rate by generating less elemental mercury. The major difference between the ICR and SEC data is in the APCD performance and the mercury closure around the APCD. The average mercury removal values across the APCDs are 2.1% and 39.4% with standard deviations (STDs) of 1990 and 75%, respectively for the ICR and SEC tests. This clearly demonstrates that variability is an issue irrespective of using 'similar' fuels at the plants and the same source sampling team measuring the species. The study also concluded that elemental mercury is the main Hg specie that needs to be controlled. 2004 technologies such as activated carbon injection (ACI) may capture up to 60% with double digit lb/MMacf addition of sorbent. PRB coal-fired units have an Hg input of 7-15 lb/TBtu; hence, these units must operate at over 60% mercury efficiency in order to bring the emission level below 5.8 lb/TBtu. This was non-achievable with the best technology available as of 2004. Other key findings include: (1) Conventional particulate collectors, such as Cold-side Electro-Static Precipitators (CESPs), Hot-side Electro-Static Precipitator (HESP), and Fabric Filter (FF) remove nearly all of the particulate bound mercury; (2) CESPs perform better highlighting the flue gas temperature effect on the mercury removal. Impact of speciation with flue gas cooling is apparent; (3) SDA's do not help in enhancing adsorption of mercury vapor species; and (4) Due to consistently low chlorine values in fuels, it was not possible to analyze the impact of chlorine. In summary, it is difficult to predict the speciation at two plants that burn the same fuel. Non-fuel issues, such as flue gas cooling, impact the speciation and consequently mercury capture potential.

Alan Bland; Kumar Sellakumar; Craig Cormylo

2007-08-01T23:59:59.000Z

187

Apparatus for control of mercury  

DOE Patents (OSTI)

A method and apparatus for reducing mercury in industrial gases such as the flue gas produced by the combustion of fossil fuels such as coal adds hydrogen sulfide to the flue gas in or just before a scrubber of the industrial process which contains the wet scrubber. The method and apparatus of the present invention is applicable to installations employing either wet or dry scrubber flue gas desulfurization systems. The present invention uses kraft green liquor as a source for hydrogen sulfide and/or the injection of mineral acids into the green liquor to release vaporous hydrogen sulfide in order to form mercury sulfide solids.

Downs, William (Alliance, OH); Bailey, Ralph T. (Uniontown, OH)

2001-01-01T23:59:59.000Z

188

Mercury and platinum abundances in mercury-manganese stars  

E-Print Network (OSTI)

We report new results for the elemental and isotopic abundances of the normally rare elements mercury and platinum in HgMn stars. Typical overabundances can be 4 dex or more. The isotopic patterns do not follow the fractionation model of White et al (1976).

C. M. Jomaron; M. M. Dworetsky; D. A. Bohlender

1998-05-06T23:59:59.000Z

189

NETL: Mercury Emissions Control Technologies - Advanced Mercury Sorbents  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Mercury Sorbents with Low Impact on Power Plant Operations Advanced Mercury Sorbents with Low Impact on Power Plant Operations Apogee Scientific, Inc. (Apogee) will lead a Team comprised of Southern Company Services, TXU, Tennessee Valley Authority, EPRI, URS Group, University of Illinois-Illinois State Geological Survey (ISGS), Southern Research Institute (SRI), Calgon Carbon, and TDA Research, Inc., to evaluate a number of advanced sorbents for removing vapor-phase mercury from coal-fired flue gas that have minimal impact on by-product utilization and/or on existing particulate collection devices (PCD). The main objective of this program is to evaluate several advanced sorbents for removing mercury from coal-fired flue gas while posing minimal impact on plant operations through three advanced sorbent concepts: 1) Sorbents which minimize impact on concrete production through selective chemical passivation of activated carbon and use of non-carbon material, 2) sorbents that minimize baghouse pressure drop and ESP emissions, and 3) sorbents that can be recovered and reused.

190

Investigation of modified speciation for enhanced control of mercury  

SciTech Connect

The control of hazardous air pollutant (HAP) emissions was addressed in Title III of the Clean Air Act Amendments of 1990, which provided an initial list of 189 elements and compounds of concern. The combustion of coal has the potential to produce a number of those species, either directly as a result of the trace elements found in coal, or as products of chemical reactions occurring in combustion. However, field studies conducted by the U.S. Department of Energy (DOE), the Electric Power Research Institute (EPRI), and others have shown that the actual emissions are very low and that effective particulate-matter capture can control most of the inorganic species. The most significant exception is mercury, which has also been singled out for particular regulatory attention because of its behavior in the environment (bioaccumulation) and the potential for deleterious health effects. In anticipation of possible regulations regarding mercury emissions, research efforts sponsored by DOE, EPRI, and others are investigating the risks posed by mercury emissions, improved techniques for measuring those emissions, and possible control measures. The focus in the control research is on techniques that can be used in conjunction with existing flue-gas-cleanup (FGC) systems in order to minimize additional capital costs and operational complexity. The very small amount of mercury (on the order of a few micrograms per cubic meter) in flue gas, its occurrence in several chemical forms that vary from system to system, the very low solubility of the elemental form, and the fact that it is usually in the vapor phase combine to make the achievement of cost-effective control a challenging task.

Livengood, C.D.; Mendelsohn, M.H.

1997-09-01T23:59:59.000Z

191

DEVELOPMENT OF CHEMICAL REDUCTION AND AIR STRIPPING PROCESSES TO REMOVE MERCURY FROM WASTEWATER  

SciTech Connect

This study evaluates the removal of mercury from wastewater using chemical reduction and air stripping using a full-scale treatment system at the Savannah River Site. The existing water treatment system utilizes air stripping as the unit operation to remove organic compounds from groundwater that also contains mercury (C ~ 250 ng/L). The baseline air stripping process was ineffective in removing mercury and the water exceeded a proposed limit of 51 ng/L. To test an enhancement to the existing treatment modality a continuous dose of reducing agent was injected for 6-hours at the inlet of the air stripper. This action resulted in the chemical reduction of mercury to Hg(0), a species that is removable with the existing unit operation. During the injection period a 94% decrease in concentration was observed and the effluent satisfied proposed limits. The process was optimized over a 2-day period by sequentially evaluating dose rates ranging from 0.64X to 297X stoichiometry. A minimum dose of 16X stoichiometry was necessary to initiate the reduction reaction that facilitated the mercury removal. Competing electron acceptors likely inhibited the reaction at the lower 1 doses, which prevented removal by air stripping. These results indicate that chemical reduction coupled with air stripping can effectively treat large-volumes of water to emerging part per trillion regulatory standards for mercury.

Jackson, D.; Looney, B.; Craig, B.; Thompson, M.; Kmetz, T.

2013-07-10T23:59:59.000Z

192

ADVANCED GASIFICATION MERCURY/TRACE METAL CONTROL WITH MONOLITH TRAPS  

SciTech Connect

Two Corning monoliths and a non-carbon-based material have been identified as potential additives for mercury capture in syngas at temperatures above 400°F and pressure of 600 psig. A new Corning monolith formulation, GR-F1-2189, described as an active sample appeared to be the best monolith tested to date. The Corning SR Liquid monolith concept continues to be a strong candidate for mercury capture. Both monolith types allowed mercury reduction to below 5-?g/m3 (~5 ppb), a current U.S. Department of Energy (DOE) goal for trace metal control. Preparation methods for formulating the SR Liquid monolith impacted the ability of the monolith to capture mercury. The Energy & Environmental Research Center (EERC)-prepared Noncarbon Sorbents 1 and 2 appeared to offer potential for sustained and significant reduction of mercury concentration in the simulated fuel gas. The Noncarbon Sorbent 1 allowed sustained mercury reduction to below 5-?g/m3 (~5 ppb). The non-carbon-based sorbent appeared to offer the potential for regeneration, that is, desorption of mercury by temperature swing (using nitrogen and steam at temperatures above where adsorption takes place). A Corning cordierite monolith treated with a Group IB metal offered limited potential as a mercury sorbent. However, a Corning carbon-based monolith containing prereduced metallic species similar to those found on the noncarbon sorbents did not exhibit significant or sustained mercury reduction. EERC sorbents prepared with Group IB and IIB selenide appeared to have some promise for mercury capture. Unfortunately, these sorbents also released Se, as was evidenced by the measurement of H2Se in the effluent gas. All sorbents tested with arsine or hydrogen selenide, including Corning monoliths and the Group IB and IIB metal-based materials, showed an ability to capture arsine or hydrogen selenide at 400°F and 600 psig. Based on current testing, the noncarbon metal-based sorbents appear to be the most effective arsine and hydrogen selenide sorbents. The noncarbon sorbent was able to reduce the concentration to 0 ppb from a starting concentration of 120 ppb. This compares to the target value of 5 ppb (~17?g/m3). The EERC-prepared metal-based pellet and coprecipitate sorbents exhibited arsine reductions of 90% or greater, being below 10 ppb. Corning SR Liquid monoliths exhibited brief periods (<1 hour) of attaining 90% arsine reduction but were able to achieve greater than 80% reduction for several hours. With respect to hydrogen selenide, all Group IB and IIB metal-based sorbents tested exhibited 100% reduction from an inlet concentration of approximately 400 ppb. Corning SR Liquid monoliths exhibited an 82% reduction when two monoliths were tested simultaneously in series.

Mark A. Musich; Michael L. Swanson; Grant E. Dunham; Joshua J. Stanislowski

2010-07-31T23:59:59.000Z

193

A Mercury orientation model including non-zero obliquity and librations  

E-Print Network (OSTI)

Long-period forcing of Mercury’s libration in longitude.M. : Resonant forcing of Mercury’s libration in longitude.A revised control network for Mercury. J. Geophys. Res. 104,

Margot, Jean-Luc

2009-01-01T23:59:59.000Z

194

CHARACTERIZATION OF COAL COMBUSTION BY-PRODUCTS FOR THE RE-EVOLUTION OF MERCURY INTO ECOSYSTEMS  

SciTech Connect

There is concern that mercury (Hg) in coal combustion by-products might be emitted into the environment during processing to other products or after the disposal/landfill of these by-products. This perception may limit the opportunities to use coal combustion by-products in recycle/reuse applications and may result in additional, costly disposal regulations. In this program, CONSOL conducted a comprehensive sampling and analytical program to include ash, flue gas desulfurization (FGD) sludge, and coal combustion by-products. This work is necessary to help identify potential problems and solutions important to energy production from fossil fuels. The program objective was to evaluate the potential for mercury emissions by leaching or volatilization, to determine if mercury enters the water surrounding an active FGD disposal site and an active fly ash slurry impoundment site, and to provide data that will allow a scientific assessment of the issue. Toxicity Characteristic Leaching Procedure (TCLP) test results showed that mercury did not leach from coal, bottom ash, fly ash, spray dryer/fabric filter ash or forced oxidation gypsum (FOG) in amounts leading to concentrations greater than the detection limit of the TCLP method (1.0 ng/mL). Mercury was detected at very low concentrations in acidic leachates from all of the fixated and more than half of the unfixated FGD sludge samples, and one of the synthetic aggregate samples. Mercury was not detected in leachates from any sample when deionized water (DI water) was the leaching solution. Mercury did not leach from electrostatic precipitator (ESP) fly ash samples collected during activated carbon injection for mercury control in amounts greater than the detection limit of the TCLP method (1.0 ng/mL). Volatilization tests could not detect mercury loss from fly ash, spray dryer/fabric filter ash, unfixated FGD sludge, or forced oxidation gypsum; the mercury concentration of these samples all increased, possibly due to absorption from ambient surroundings. Mercury loss of 18-26% was detected after 3 and 6 months at 100 F and 140 F from samples of the fixated FGD sludge. Water samples were collected from existing ground water monitoring wells around an active FGD disposal site (8 wells) and an active fly ash slurry impoundment (14 wells). These were wells that the plants have installed to comply with ground water monitoring requirements of their permits. Mercury was not detected in any of the water samples collected from monitoring wells at either site. A literature review concluded that coal combustion byproducts can be disposed of in properly designed landfills that minimize the potentially negative impacts of water intrusion that carries dissolved organic matter (DOM). Dissolved organic matter and sulfate-reducing bacteria can promote the transformation of elemental or oxidized mercury into methyl mercury. The landfill should be properly designed and capped with clays or similar materials to minimize the wet-dry cycles that promote the release of methylmercury.

J.A. Withum; J.E. Locke; S.C. Tseng

2005-03-01T23:59:59.000Z

195

Exploring the structural basis for selenium/mercury antagonism in Allium fistulosum  

Science Conference Proceedings (OSTI)

While continuing efforts are devoted to studying the mutually protective effect of mercury and selenium in mammals, few studies have investigated the mercury-selenium antagonism in plants. In this study, we report the metabolic fate of mercury and selenium in Allium fistulosum (green onion) after supplementation with sodium selenite and mercuric chloride. Analysis of homogenized root extracts via capillary reversed phase chromatography coupled with inductively coupled plasma mass spectrometry (capRPLC-ICP-MS) suggests the formation of a mercury-selenium containing compound. Micro-focused synchrotron X-ray fluorescence mapping of freshly excised roots show Hg sequestered on the root surface and outlining individual root cells, while Se is more evenly distributed throughout the root. There are also discrete Hg-only, Se-only regions and an overall strong correlation between Hg and Se throughout the root. Analysis of the X-ray absorption near edge structure (XANES) spectra show a 'background' of methylselenocysteine within the root with discrete spots of SeO{sub 3}{sup 2-}, Se{sup 0} and solid HgSe on the root surface. Mercury outlining individual root cells is possibly binding to sulfhydryl groups or plasma membrane or cell wall proteins, and in some places reacting with reduced selenium in the rhizosphere to form a mercury(II) selenide species. Together with the formation of the root-bound mercury(II) selenide species, we also report on the formation of cinnabar (HgS) and Hg{sup 0} in the rhizosphere. The results presented herein shed light on the intricate chemical and biological processes occurring within the rhizosphere that influence Hg and Se bioavailability and will be instrumental in predicting the fate and assisting in the remediation of these metals in the environment and informing whether or not fruit and vegetable food selection from aerial plant compartments or roots from plants grown in Hg contaminated soils, are safe for consumption.

McNear, Jr., David H.; Afton, Scott E.; Caruso, Joseph A. (UCIN); (Kentucky)

2012-12-10T23:59:59.000Z

196

Mercury-Contaminated Hydraulic Mining Debris in San Francisco Bay  

E-Print Network (OSTI)

S, and Flegal AR 2008. Mercury in the San Francisco Estuary.may 2010 Mercury-Contaminated Hydraulic Mining Debris in Sancontaminants such as ele- mental mercury and cyanide used in

Bouse, Robin M; Fuller, Christopher C; Luoma, Sam; Hornberger, Michelle I; Jaffe, Bruce E; Smith, Richard E

2010-01-01T23:59:59.000Z

197

Control of mercury methylation in wetlands through iron addition  

E-Print Network (OSTI)

Mason, R. P. ; Flegal, A. R. , Mercury speciation in the SanP. ; Flegal, A. R. , Decadal mercury trends in San FranciscoP. G. ; Nelson, D. C. , Mercury methylation from unexpected

Sedlak, David L; Ulrich, Patrick D

2009-01-01T23:59:59.000Z

198

1606 JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY VOLUME 46 Dynamic Surface Interface Exchanges of Mercury: A Review and Compartmentalized Modeling Framework  

E-Print Network (OSTI)

This paper presents a review of recent natural surface mercury exchange research in the context of a new modeling framework. The literature indicates that the mercury biogeochemical flux is more dynamic than the current models predict, with interacting multimedia storage and processes. Although several natural mercury emissions models have been created and incorporated into air quality models (AQMs), none are coupled with air quality models on a mass balance basis, and all lack the capacity to explain processes that involve the transport of mercury across atmosphere–surface media concentration gradients. Existing natural mercury emission models treat the surface as both an infinite source and infinite sink for emissions and deposition, respectively, and estimate emissions through the following three pathways: soil, vegetation, and surface waters. The use of these three transport pathways, but with compartmentalized surface storage in a surface–vegetation–atmosphere transport (SVAT) resistance model, is suggested. Surface water fluxes will be modeled using a two-film diffusion model coupled to a surface water photochemical model. This updated framework will allow both the parameterization of the transport of mercury across atmosphere– surface media concentration gradients and the accumulation/depletion of mercury in the surface media. However, several key parameters need further experimental verification before the proposed modeling framework can be implemented in an AQM. These include soil organic mercury interactions, bioavailability, cuticular transport of mercury, atmospheric surface compensation points for different vegetation species, and enhanced soil diffusion resulting from pressure perturbations. 1.

Jesse O. Bash; Patricia Bresnahan; David; R. Miller

2006-01-01T23:59:59.000Z

199

Amended Silicated for Mercury Control  

Science Conference Proceedings (OSTI)

Amended Silicates{trademark}, a powdered, noncarbon mercury-control sorbent, was tested at Duke Energy's Miami Fort Station, Unit 6 during the first quarter of 2006. Unit 6 is a 175-MW boiler with a cold-side electrostatic precipitator (ESP). The plant burns run-of-the-river eastern bituminous coal with typical ash contents ranging from 8-15% and sulfur contents from 1.6-2.6% on an as-received basis. The performance of the Amended Silicates sorbent was compared with that for powdered activated carbon (PAC). The trial began with a period of baseline monitoring during which no sorbent was injected. Sampling during this and subsequent periods indicated mercury capture by the native fly ash was less than 10%. After the baseline period, Amended Silicates sorbent was injected at several different ratios, followed by a 30-day trial at a fixed injection ratio of 5-6 lb/MMACF. After this period, PAC was injected to provide a comparison. Approximately 40% mercury control was achieved for both the Amended Silicates sorbent and PAC at injection ratios of 5-6 lbs/MMACF. Higher injection ratios did not achieve significantly increased removal. Similar removal efficiencies have been reported for PAC injection trials at other plants with cold-side ESPs, most notably for plants using medium to high sulfur coal. Sorbent injection did not detrimentally impact plant operations and testing confirmed that the use of Amended Silicates sorbent does not degrade fly ash quality (unlike PAC). The cost for mercury control using either PAC or Amended Silicates sorbent was estimated to be equivalent if fly ash sales are not a consideration. However, if the plant did sell fly ash, the effective cost for mercury control could more than double if those sales were no longer possible, due to lost by-product sales and additional cost for waste disposal. Accordingly, the use of Amended Silicates sorbent could reduce the overall cost of mercury control by 50% or more versus PAC for locations where fly ash is sold as a by-product.

James Butz; Thomas Broderick; Craig Turchi

2006-12-31T23:59:59.000Z

200

Mercury in Alaskan Eskimo mothers and infants  

E-Print Network (OSTI)

The potential danger of natural mercury accumulation in the diet of the Eskimo is evaluated through mercury levels determined in cord blood, placenta, maternal blood, hair, and milk of 38 maternal-infant pairs from Anchorage and the Yukon-Kuskokwim Delta. Although mercury levels are not discernably dangerous, trends to larger accumulations in maternal and fetal RBC and placental tissue with proximity to the sea and consumption of seals during pregnancy provide the basis for considering possible indicators of neonatal involvement. Mercury level in RBC from cord blood appeared as the best potential indicator of this involvement, although relationships with the mother's diet and level of mercury in the placenta also appear useful. In this area, average and maximal mercury levels in cord blood are 39 and 78 ng/ml, respectively, far below the acknowledged toxic level in infants of these mothers who eat seals or fish every day during their pregnancy.

William A. Galster

1976-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

COST OF MERCURY REMOVAL IN IGCC PLANTS  

NLE Websites -- All DOE Office Websites (Extended Search)

Cost of Mercury Removal Cost of Mercury Removal in an IGCC Plant Final Report September 2002 Prepared for: The United States Department of Energy National Energy Technology Laboratory By: Parsons Infrastructure and Technology Group Inc. Reading, Pennsylvania Pittsburgh, Pennsylvania DOE Product Manager: Gary J. Stiegel DOE Task Manager: James R. Longanbach Principal Investigators: Michael G. Klett Russell C. Maxwell Michael D. Rutkowski PARSONS The Cost of Mercury Removal in an IGCC Plant Final Report i September 2002 TABLE OF CONTENTS Section Title Page 1 Summary 1 2 Introduction 3 3 Background 4 3.1 Regulatory Initiatives 4 3.2 Mercury Removal for Conventional Coal-Fired Plants 4 3.3 Mercury Removal Experience in Gasification 5 3.4 Variability of Mercury Content in Coal 6 4 Design Considerations 7 4.1 Carbon Bed Location

202

Mercury in the Lake Powell ecosystem  

SciTech Connect

Flameless atomic absorption analyses of samples from Lake Powell yield the following mercury levels (in mean parts per billion): 0.01 in lake water, 30 in bottom sediments, 10 in shoreline substrates, 34 in plant leaves, 145 in plant debris, 28 in algae, 10 in crayfish, and 232 in fish muscle. Bioamplification and the association of mercury with organic matter are evident in this recently created, relatively unpolluted reservoir. Formulation of an estimated mercury budget suggests that the restriction of outflow in the impounded Colorado River leads to mercury accumulation, and that projected regional coal-fired power generation may produce sufficient amounts of mercury to augment significantly the mercury released by natural weathering.

Standiford, D.R.; Potter, L.D.; Kidd, D.E.

1973-06-01T23:59:59.000Z

203

Assessment of Low Cost Novel Mercury Sorbents  

NLE Websites -- All DOE Office Websites (Extended Search)

Testing of Mercury Control Technologies Testing of Mercury Control Technologies for Coal-Fired Power Plants by Thomas J. Feeley, III 1. , Lynn A. Brickett 1. , B. Andrew O'Palko 1. , and James T. Murphy 2. 1. U.S. Department of Energy, National Energy Technology Laboratory 2. Science Applications International Corporation The U.S. Department of Energy/National Energy Technology Laboratory (DOE/NETL) is conducting a comprehensive research, development, and demonstration (RD&D) program directed at advancing the performance and economics of mercury control technologies for coal- fired power plants. The program also includes evaluating the fate of mercury in coal by-products and studying the transport and transformation of mercury in power plant plumes. This paper presents results from ongoing full-scale and slip-stream field testing of several mercury control

204

Release of Mercury During Curing of Concrete Containing Fly Ash and Mercury Sorbent Material  

Science Conference Proceedings (OSTI)

This report provides laboratory data on mercury release during the initial curing stage of concrete made with fly ash or mixtures of fly ash and activated carbon containing mercury. These experiments suggest that mercury is not released from these concretes during initial curing.

2002-12-09T23:59:59.000Z

205

Process for removing mercury from aqueous solutions  

DOE Patents (OSTI)

A process for removing mercury from water to a level not greater than two parts per billion wherein an anion exchange material that is insoluble in water is contacted first with a sulfide containing compound and second with a compound containing a bivalent metal ion forming an insoluble metal sulfide. To this treated exchange material is contacted water containing mercury. The water containing not more than two parts per billion of mercury is separated from the exchange material.

Googin, John M. (Oak Ridge, TN); Napier, John M. (Oak Ridge, TN); Makarewicz, Mark A. (Knoxville, TN); Meredith, Paul F. (Knoxville, TN)

1986-01-01T23:59:59.000Z

206

Process for removing mercury from aqueous solutions  

DOE Patents (OSTI)

A process for removing mercury from water to a level not greater than two parts per billion wherein an anion exchange material that is insoluble in water is contacted first with a sulfide containing compound and second with a compound containing a bivalent metal ion forming an insoluble metal sulfide. To this treated exchange material is contacted water containing mercury. The water containing not more than two parts per billion of mercury is separated from the exchange material.

Googin, J.M.; Napier, J.M.; Makarewicz, M.A.; Meredith, P.F.

1985-03-04T23:59:59.000Z

207

Remediation of Mercury and Industrial Contaminants Applied Field...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Remediation of Mercury and Industrial Contaminants Applied Field Research Initiative (RoMIC-AFRI) Remediation of Mercury and Industrial Contaminants Applied Field Research...

208

NETL: Mercury Emissions Control Technologies - Non-Thermal Plasma...  

NLE Websites -- All DOE Office Websites (Extended Search)

Non-Thermal Plasma Based Removal of Mercury Project Summary Powerspan Corp. will pilot test a multi-pollutant technology that converts mercury into mercuric oxide, nitrogen oxide...

209

Mercury Vapor At Desert Peak Area (Varekamp & Buseck, 1983) ...  

Open Energy Info (EERE)

Mercury Vapor At Desert Peak Area (Varekamp & Buseck, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Desert Peak Area...

210

Mercury Vapor At Socorro Mountain Area (Kooten, 1987) | Open...  

Open Energy Info (EERE)

Mercury Vapor At Socorro Mountain Area (Kooten, 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Socorro Mountain Area...

211

THE EFFECT OF MERCURY CONTROLS ON WALLBOARD MANUFACTURE  

Science Conference Proceedings (OSTI)

Pending EPA regulations may mandate 70 to 90% mercury removal efficiency from utility flue gas. A mercury control option is the trapping of oxidized mercury in wet flue gas desulfurization systems (FGD). The potential doubling of mercury in the FGD material and its effect on mercury volatility at temperatures common to wallboard manufacture is a concern that could limit the growing byproduct use of FGD material. Prediction of mercury fate is limited by lack of information on the mercury form in the FGD material. The parts per billion mercury concentrations prevent the identification of mercury compounds by common analytical methods. A sensitive analytical method, cold vapor atomic fluorescence, coupled with leaching and thermodecomposition methods were evaluated for their potential to identify mercury compounds in FGD material. The results of the study suggest that the mercury form is dominated by the calcium sulfate matrix and is probably associated with the sulfate form in the FGD material. Additionally, to determine the effect of high mercury concentration FGD material on wallboard manufacture, a laboratory FGD unit was built to trap the oxidized mercury generated in a simulated flue gas. Although the laboratory prepared FGD material did not contain the mercury concentrations anticipated, further thermal tests determined that mercury begins to evolve from FGD material at 380 to 390 F, consequently dropping the drying temperature should mitigate mercury evolution if necessary. Mercury evolution is also diminished as the weight of the wallboard sample increased. Consequently, mercury evolution may not be a significant problem in wallboard manufacture.

Sandra Meischen

2004-07-01T23:59:59.000Z

212

Mercury Vapor At Mccoy Geothermal Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Mercury Vapor At Mccoy Geothermal Area (DOE GTP) Exploration Activity Details Location Mccoy Geothermal Area Exploration Technique Mercury Vapor Activity Date Usefulness not...

213

NETL: Mercury Emissions Control Technologies - Demonstration...  

NLE Websites -- All DOE Office Websites (Extended Search)

Demonstration of Integrated Approach to Mercury Control This project will demonstrate a novel multi-pollutant control technology for coal-fired power plants that can reduce...

214

NETL: IEP - Mercury Emissions Control: News Releases  

NLE Websites -- All DOE Office Websites (Extended Search)

News Releases The following are links to various recent news stories related to mercury in the environment. These links are provided strictly as a convenience to the general...

215

NETL: Mercury Emissions Control Technologies - Brominated Sorbents...  

NLE Websites -- All DOE Office Websites (Extended Search)

ESPs, and Fly Ash Use in Concrete Sorbent Technology will test two technologies for mercury removal from flue gas. Their concrete safe brominated sorbent will be tested at...

216

Apparatus for isotopic alteration of mercury vapor  

DOE Patents (OSTI)

An apparatus for enriching the isotopic Hg content of mercury is provided. The apparatus includes a reactor, a low pressure electric discharge lamp containing a fill including mercury and an inert gas. A filter is arranged concentrically around the lamp. In a preferred embodiment, constant mercury pressure is maintained in the filter by means of a water-cooled tube that depends from it, the tube having a drop of mercury disposed in it. The reactor is arranged around the filter, whereby radiation from said lamp passes through the filter and into said reactor. The lamp, the filter and the reactor are formed of a material which is transparent to ultraviolet light.

Grossman, Mark W. (Belmont, MA); George, William A. (Gloucester, MA); Marcucci, Rudolph V. (Danvers, MA)

1988-01-01T23:59:59.000Z

217

Mercury Emission Measurement at a CFB Plant  

DOE Green Energy (OSTI)

In response to pending regulation to control mercury emissions in the United States and Canada, several projects have been conducted to perform accurate mass balances at pulverized coal (pc)-fired utilities. Part of the mercury mass balance always includes total gaseous mercury as well as a determination of the speciation of the mercury emissions and a concentration bound to the particulate matter. This information then becomes useful in applying mercury control strategies, since the elemental mercury has traditionally been difficult to control by most technologies. In this instance, oxidation technologies have proven most beneficial for increased capture. Despite many years of mercury measurement and control projects at pc-fired units, far less work has been done on circulating fluidized-bed (CFB) units, which are able to combust a variety of feedstocks, including cofiring coal with biomass. Indeed, these units have proven to be more problematic because it is very difficult to obtain a reliable mercury mass balance. These units tend to have very different temperature profiles than pc-fired utility boilers. The flexibility of CFB units also tends to be an issue when a mercury balance is determined, since the mercury inputs to the system come from the bed material and a variety of fuels, which can have quite variable chemistry, especially for mercury. In addition, as an integral part of the CFB operation, the system employs a feedback loop to circulate the bed material through the combustor and the solids collection system (the primary cyclone), thereby subjecting particulate-bound metals to higher temperatures again. Despite these issues, CFB boilers generally emit very little mercury and show good native capture. The Energy & Environmental Research Center is carrying out this project for Metso Power in order to characterize the fate of mercury across the unit at Rosebud Plant, an industrial user of CFB technology from Metso. Appropriate solids were collected, and flue gas samples were obtained using the Ontario Hydro method, mercury continuous emission monitors, and sorbent trap methods. In addition, chlorine and fluorine were determined for solids and in the flue gas stream. Results of this project have indicated a very good mercury mass balance for Rosebud Plant, indicating 105 {+-} 19%, which is well within acceptable limits. The mercury flow through the system was shown to be primarily in with the coal and out with the flue gas, which falls outside of the norm for CFB boilers.

John Pavlish; Jeffrey Thompson; Lucinda Hamre

2009-02-28T23:59:59.000Z

218

Establishing Measurement Traceability for Gaseous Mercury ...  

Science Conference Proceedings (OSTI)

... NIST already provides mercury traceability to the SI for many solid- and liquid-matrix materials, including fossil fuels, through the SRM program, but ...

2012-10-01T23:59:59.000Z

219

Alkaline sorbent injection for mercury control  

DOE Patents (OSTI)

A mercury removal system for removing mercury from combustion flue gases is provided in which alkaline sorbents at generally extremely low stoichiometric molar ratios of alkaline earth or an alkali metal to sulfur of less than 1.0 are injected into a power plant system at one or more locations to remove at least between about 40% and 60% of the mercury content from combustion flue gases. Small amounts of alkaline sorbents are injected into the flue gas stream at a relatively low rate. A particulate filter is used to remove mercury-containing particles downstream of each injection point used in the power plant system.

Madden, Deborah A. (Boardman, OH); Holmes, Michael J. (Washington Township, Stark County, OH)

2003-01-01T23:59:59.000Z

220

Alkaline sorbent injection for mercury control  

DOE Patents (OSTI)

A mercury removal system for removing mercury from combustion flue gases is provided in which alkaline sorbents at generally extremely low stoichiometric molar ratios of alkaline earth or an alkali metal to sulfur of less than 1.0 are injected into a power plant system at one or more locations to remove at least between about 40% and 60% of the mercury content from combustion flue gases. Small amounts of alkaline sorbents are injected into the flue gas stream at a relatively low rate. A particulate filter is used to remove mercury-containing particles downstream of each injection point used in the power plant system.

Madden, Deborah A. (Boardman, OH); Holmes, Michael J. (Washington Township, Stark County, OH)

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Mercury audit at Rocky Mountain Arsenal  

Science Conference Proceedings (OSTI)

This report presents the results of an environmental compliance audit to identify potential mercury-containing equipment in 261 building and 197 tanks at the Rocky Mountain Arsenal (RMA). The RMA, located near Denver, Colorado, is undergoing clean up and decommissioning by the Department of the Army. Part of the decommissioning procedure is to ensure that all hazardous wastes are properly identified and disposed of. The purpose of the audit was to identify any mercury spills and mercury-containing instrumentation. The audit were conducted from April 7, 1992, through July 16, 1992, by a two-person team. The team interviewed personnel with knowledge of past uses of the buildings and tanks. Information concerning past mercury spills and the locations and types of instrumentation that contain mercury proved to be invaluable for an accurate survey of the arsenal. The team used a Jerome{reg_sign} 431-X{trademark} Mercury Vapor Analyzer to detect spills and confirm locations of mercury vapor. Twelve detections were recorded during the audit and varied from visible mercury spills to slightly elevated readings in the corners of rooms with past spills. The audit also identified instrumentation that contained mercury. All data have been incorporated into a computerized data base that is compatible with the RMA data base.

Smith, S.M.; Jensen, M.K. [Oak Ridge National Lab., TN (United States); Anderson, G.M. [Rocky Mountain Arsenal, Denver, CO (United States)

1994-02-01T23:59:59.000Z

222

NETL: Mercury Emissions Control Technologies - University of...  

NLE Websites -- All DOE Office Websites (Extended Search)

Using SCR and SNCR NOx Control Technologies Determination of the Speciated Mercury Inventory at Four Coal-Fired Boilers Using Continuous Hg Monitors Longer-Term Testing of...

223

Mercury Sorbent Delivery System for Flue Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

(NETL) is seeking licensing partners interested in implementing United States Patent Number 7,494,632 entitled "Mercury Sorbent Delivery System for Flue Gas." Disclosed in...

224

NETL: Mercury Emissions Control Technologies - Field Testing...  

NLE Websites -- All DOE Office Websites (Extended Search)

or without performance additives, to reduce mercury emissions from a Texas utility burning either Texas lignite or a blend of Texas lignite and subbituminous coals. Sorbents...

225

NETL: Mercury Emissions Control Technologies - Modifications...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Control Jointly funded by DOE and the Electric Power Research Institute (EPRI), this project's purpose is to investigate novel approaches of capturing elemental and...

226

Controls on Fluxes of Mercury in Aquatic Food Webs: Application of the Dynamic Mercury Cycling Model to Four Enclosure Experiments w ith Additions of Stable Mercury Isotopes  

Science Conference Proceedings (OSTI)

New controls on utility mercury emissions are under consideration in order to limit human exposure to mercury resulting from fish consumption. Evaluation of such measures requires an understanding of how mercury cycles through lakes and streams. This report describes the application of EPRI's Dynamic Mercury Cycling Model (D-MCM) to experiments involving the addition of stable mercury Hg(II) isotopes to four 10-meter-diameter enclosures in a lake.

2001-09-21T23:59:59.000Z

227

Oak Ridge Moves Forward in Mercury Cleanup | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Oak Ridge Moves Forward in Mercury Cleanup Oak Ridge Moves Forward in Mercury Cleanup Oak Ridge Moves Forward in Mercury Cleanup March 28, 2013 - 12:00pm Addthis Workers recently removed five large mercury-contaminated tanks from Y-12. Workers recently removed five large mercury-contaminated tanks from Y-12. Removing these tanks is part of the steps to reduce potential risk from mercury at Y-12. Removing these tanks is part of the steps to reduce potential risk from mercury at Y-12. Workers recently removed five large mercury-contaminated tanks from Y-12. Removing these tanks is part of the steps to reduce potential risk from mercury at Y-12. OAK RIDGE, Tenn. - Oak Ridge's EM program is making significant progress to reduce environmental mercury releases from the Y-12 National Security Complex. Mercury is one of the greatest environmental concerns facing the Oak Ridge

228

Oak Ridge Moves Forward in Mercury Cleanup | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Moves Forward in Mercury Cleanup Moves Forward in Mercury Cleanup Oak Ridge Moves Forward in Mercury Cleanup March 28, 2013 - 12:00pm Addthis Workers recently removed five large mercury-contaminated tanks from Y-12. Workers recently removed five large mercury-contaminated tanks from Y-12. Removing these tanks is part of the steps to reduce potential risk from mercury at Y-12. Removing these tanks is part of the steps to reduce potential risk from mercury at Y-12. Workers recently removed five large mercury-contaminated tanks from Y-12. Removing these tanks is part of the steps to reduce potential risk from mercury at Y-12. OAK RIDGE, Tenn. - Oak Ridge's EM program is making significant progress to reduce environmental mercury releases from the Y-12 National Security Complex. Mercury is one of the greatest environmental concerns facing the Oak Ridge

229

Mercury: the planet and its orbit  

E-Print Network (OSTI)

The planet closest to the Sun, Mercury, is the subject of renewed attention among planetary scientists, as two major space missions will visit it within the next decade. These will be the first to return to Mercury, after the flybys by NASA's Mariner 10 spacecraft in 1974--5. The difficulties of observing this planet from the Earth make such missions necessary for further progress in understanding its origin, evolution and present state. This review provides an overview of what is known about Mercury and what are the major outstanding issues. Mercury's orbital and rotation periods are in a unique 2:3 resonance; an analysis of the orbital dynamics of Mercury is presented here, as well as Mercury's special role in testing theories of gravitation. These derivations provide a good insight into the complexities of planetary motion in general, and how, in the case of Mercury, its proximity to the Sun can be described and exploited in terms of general relativity. Mercury's surface, superficially similar to that of the Moon, presents intriguing differences, representing a different, and more complex history in which the role of early volcanism remains to be clarified and understood. Mercury's interior presents the most important puzzles: it has the highest uncompressed density among the terrestrial planets, implying a very large, mostly iron core. This does not appear to be the completely solidified yet, as Mariner 10 found a planetary magnetic field that is probably generated by an internal dynamo, in a liquid outer layer of the large iron core. The current state of the core, once established, will provide a constraint for its evolution from the time of the planet's formation. Mercury's environment is highly variable. There is only a tenuous exosphere around Mercury; its sourc...

André Balogh; Giacomo Giampieri

2002-01-01T23:59:59.000Z

230

Recovery of Mercury From Contaminated Liquid Wastes  

SciTech Connect

The Base Contract program emphasized the manufacture and testing of superior sorbents for mercury removal, testing of the sorption process at a DOE site, and determination of the regeneration conditions in the laboratory. During this project, ADA Technologies, Inc. demonstrated the following key elements of a successful regenerable mercury sorption process: (1) sorbents that have a high capacity for dissolved, ionic mercury; (2) removal of ionic mercury at greater than 99% efficiency; and (3) thermal regeneration of the spent sorbent. ADA's process is based on the highly efficient and selective sorption of mercury by noble metals. Contaminated liquid flows through two packed columns that contain microporous sorbent particles on which a noble metal has been finely dispersed. A third column is held in reserve. When the sorbent is loaded with mercury to the point of breakthrough at the outlet of the second column, the first column is taken off-line and the flow of contaminated liquid is switched to the second and third columns. The spent column is regenerated by heating. A small flow of purge gas carries the desorbed mercury to a capture unit where the liquid mercury is recovered. Laboratory-scale tests with mercuric chloride solutions demonstrated the sorbents' ability to remove mercury from contaminated wastewater. Isotherms on surrogate wastes from DOE's Y-12 Plant in Oak Ridge, Tennessee showed greater than 99.9% mercury removal. Laboratory- and pilot-scale tests on actual Y-12 Plant wastes were also successful. Mercury concentrations were reduced to less than 1 ppt from a starting concentration of 1,000 ppt. The treatment objective was 50 ppt. The sorption unit showed 10 ppt discharge after six months. Laboratory-scale tests demonstrated the feasibility of sorbent regeneration. Results show that sorption behavior is not affected after four cycles.

1998-06-12T23:59:59.000Z

231

Fly ash properties and mercury sorbent affect mercury release from curing concrete  

Science Conference Proceedings (OSTI)

The release of mercury from concrete containing fly ashes from various generator boilers and powdered activated carbon sorbent used to capture mercury was measured in laboratory experiments. Release of gaseous mercury from these concretes was less than 0.31% of the total quantity of mercury present. The observed gaseous emissions of mercury during the curing process demonstrated a dependency on the organic carbon content of the fly ash, with mercury release decreasing with increasing carbon content. Further, lower gaseous emissions of mercury were observed for concretes incorporating ash containing activated carbon sorbent than would be expected based on the observed association with organic carbon, suggesting that the powdered activated carbon more tightly binds the mercury as compared to unburned carbon in the ash. Following the initial 28-day curing interval, mercury release diminished with time. In separate leaching experiments, average mercury concentrations leached from fly ash concretes were less than 4.1 ng/L after 18 h and 7 days, demonstrating that less than 0.02% of the mercury was released during leaching. 25 refs., 4 figs., 5 tabs.

Danold W. Golightly; Chin-Min Cheng; Linda K. Weavers; Harold W. Walker; William E. Wolfe [State University, Columbus, OH (United States). Department of Civil and Environmental Engineering and Geodetic Science

2009-04-15T23:59:59.000Z

232

Confounding effects of aqueous-phase impinger chemistry on apparent oxidation of mercury in flue gases  

SciTech Connect

Gas-phase reactions between elemental mercury and chlorine are a possible pathway to producing oxidized mercury species such as mercuric chloride in combustion systems. This study examines the effect of the chemistry of a commonly used sample conditioning system on apparent and actual levels of mercury oxidation in a methane-fired, 0.3 kW, quartz-lined reactor in which gas composition (HCl, Cl{sub 2}, NOx, SO{sub 2}) and quench rate were varied. The sample conditioning system included two impingers in parallel: one containing an aqueous solution of KCl to trap HgCl{sub 2}, and one containing an aqueous solution of SnCl{sub 2} to reduce HgCl{sub 2} to elemental mercury (Hg{sup 0}). Gas-phase concentrations of Cl{sub 2} as low as 1.5 ppmv were sufficient to oxidize a significant fraction of the elemental mercury in the KCl impinger via the hypochlorite ion. Furthermore, these low, but interfering levels of Cl{sub 2} appeared to persist in flue gases from several doped rapidly mixed flames with varied post flame temperature quench rates. The addition of 0.5 wt% sodium thiosulfate to the KCl solution completely prevented the oxidation from occurring in the impinger. The addition of thiosulfate did not inhibit the KCl impinger's ability to capture HgCl{sub 2}. The effectiveness of the thiosulfate was unchanged by NO or SO{sub 2}. These results bring into question laboratory scale experimental data on mercury oxidation where wet chemistry was used to partition metallic and oxidized mercury without the presence of sufficient levels of SO{sub 2}. 23 refs., 5 figs., 1 tab.

Brydger Cauch; Geoffrey D. Silcox; Joann S. Lighty; Jost O.L. Wendt; Andrew Fry; Constance L. Senior [University of Utah, Salt Lake City, UT (United States). Department of Chemical Engineering

2008-04-01T23:59:59.000Z

233

Development of New Optical Sensors for Measurements of Mercury Concentrations, Speciation, and Chemistry  

SciTech Connect

A diode-laser-based ultraviolet absorption sensor for elemental mercury was developed and applied for measurements in a high-temperature flow reactor and in the exhaust stream of a coal-fired combustor. The final version of the sensor incorporates a 375-nm single-mode laser and a 784-nm distributed feedback (DFB) laser. The output of these lasers is sum-frequency mixed in a non-linear beta-barium borate crystal to generate a 254-nm beam. By tuning the frequency of the DFB laser, the ultraviolet beam frequency is tuned across the transition frequency of mercury at 253.7-nm. The tuning range is large enough that an off-resonant baseline was clearly visible on both sides of the Hg transition. Because of this large tuning range, the effects of broadband absorption can be effectively eliminated during data analysis. Broadband absorption is a major concern for lamp-based mercury sensor, and the sample to be monitored must be chemically treated prior to analysis to remove species such as SO{sub 2} that absorb near 253.7 nm. No pretreatment is required when our diode-laser-based sensor is used for elemental mercury measurements. Our laser sensor measurements were compared to measurements from a commercial mercury analyzer (CMA), and were generally in good agreement except that the insitu diode-laser-based sensor measurements tended to give somewhat higher concentrations than the CMA measurements, presumably due to absorption of elemental mercury in the sampling lines needed for the CMA measurements. At Texas A&M University, the homogeneous oxidation of elemental mercury was studied using a high-temperature flow reactor.

Robert Lucht

2008-09-28T23:59:59.000Z

234

Pilot Testing of WRI'S Novel Mercury Control Technology by Pre-Combustion Thermal Treatment of Coal  

Science Conference Proceedings (OSTI)

The challenges to the coal-fired power industry continue to focus on the emission control technologies, such as mercury, and plant efficiency improvements. An alternate approach to post-combustion control of mercury, while improving plant efficiency deals with Western Research Institute's (WRI)'s patented pre-combustion mercury removal and coal upgrading technology. WRI was awarded under the DOE's Phase III Mercury program, to evaluate the effectiveness of WRI's novel thermal pretreatment process to achieve >50% mercury removal, and at costs of Edison (DTE), and SaskPower to undertake this evaluation. The technical objectives of the project were structured in two phases: Phase I--coal selection and characterization, and bench-and PDU-scale WRI process testing and; and Phase II--pilot-scale pc combustion testing, design of an integrated boiler commercial configuration, its impacts on the boiler performance and the economics of the technology related to market applications. This report covers the results of the Phase I testing. The conclusion of the Phase I testing was that the WRI process is a technically viable technology for (1) removing essentially all of the moisture from low rank coals, thereby raising the heating value of the coal by about 30% for subbituminous coals and up to 40% for lignite coals, and (2) for removing volatile trace mercury species (up to 89%) from the coal prior to combustion. The results established that the process meets the goals of DOE of removing <50% of the mercury from the coals by pre-combustion methods. As such, further testing, demonstration and economic analysis as described in the Phase II effort is warranted and should be pursued.

Alan Bland; Jesse Newcomer; Kumar Sellakumar

2008-08-17T23:59:59.000Z

235

2006 Mercury Control Technology Conference Proceedings  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Control Technology Conference Mercury Control Technology Conference December 11-13, 2006 Table of Contents Disclaimer Papers and Presentations Introduction Sorbent Injection By-Product Characterization/Management Mercury Oxidation and Co-Removal with FGD Systems Other Mercury Control Technology Panel Discussions Posters New 2006 Phase III Mercury Field Testing Projects Sorbent Injection Pretreatment of Coal Oxidation of Mercury Environmental Studies on Mercury Mercury in CUBs Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government or any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

236

Milestone Project Demonstrates Innovative Mercury Emissions Reduction  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Milestone Project Demonstrates Innovative Mercury Emissions Milestone Project Demonstrates Innovative Mercury Emissions Reduction Technology Milestone Project Demonstrates Innovative Mercury Emissions Reduction Technology January 12, 2010 - 12:00pm Addthis Washington, DC - An innovative technology that could potentially help some coal-based power generation facilities comply with anticipated new mercury emissions standards was successfully demonstrated in a recently concluded milestone project at a Michigan power plant. Under a cooperative agreement with the U.S. Department of Energy's (DOE's) National Energy Technology Laboratory (NETL), WE Energies demonstrated the TOXECON(TM) process in a $52.9million project at the Presque Isle Power Plant in Marquette, Mich. TOXECON is a relatively cost-effective option for achieving significant reductions in mercury emissions and increasing the

237

Mercury removal from solid mixed waste  

SciTech Connect

The removal of mercury from mixed wastes is an essential step in eliminating the temporary storage of large inventories of mixed waste throughout the Department of Energy (DOE) complex. Currently thermal treatment has been identified as a baseline technology and is being developed as part of the DOE Mixed Waste Integrated Program (MWIP). Since thermal treatment will not be applicable to all mercury containing mixed waste and the removal of mercury prior to thermal treatment may be desirable, laboratory studies have been initiated at Oak Ridge National Laboratory (ORNL) to develop alternative remediation technologies capable of removing mercury from certain mixed waste. This paper describes laboratory investigations of the KI/I{sub 2} leaching processes to determine the applicability of this process to mercury containing solid mixed waste.

Gates, D.D.; Morrissey, M.; Chava, K.K.; Chao, K.

1994-12-31T23:59:59.000Z

238

Mercury Emissions Control in Wet FGD Systems  

E-Print Network (OSTI)

The Babcock & Wilcox Company (B&W) and McDermott Technology, Inc. (MTI) have had a continuing program over the past decade for characterizing and optimizing mercury control in flue gas desulfurization (FGD) systems. These efforts have led to the characterization of mercury emissions control at two utility installations and full-scale demonstration (55 MW and 1300 MW) of the effect of a mercury control performance enhancement additive for wet FGD systems. This paper presents the results of the mercury emissions control testing conducted at these two sites. The performance is related to EPA Information Collection Request (ICR) data from an FGD system supplier’s perspective, highlighting the need to consider the effects of system design and operation when evaluating mercury emissions control performance.

Paul S. Nolan; Babcock Wilcox; Kevin E. Redinger; Babcock Wilcox; Gerald T. Amrhein; Gregory A. Kudlac

2002-01-01T23:59:59.000Z

239

Selective extraction of copper, mercury, silver and palladium ions from water using hydrophobic ionic liquids.  

E-Print Network (OSTI)

K. ; Khan, R. H. Low dose mercury toxicity and human health.Gochfeld, M. Cases of mercury exposure, bioavailability, andto enhanced extraction for mercury. Acknowledgements For

Papaiconomou, Nicolas; Lee, Jong-Min; Salminen, Justin; Von Stosch, Moritz; Prausnitz, John M.

2008-01-01T23:59:59.000Z

240

A Mass Balance for Mercury in the San Francisco Bay Area  

E-Print Network (OSTI)

and transformation of mercury. I. Model development andand transformation of mercury. II. Simulation results forFernandez, G. C. J. , Mercury and plants in contaminated

MacLeod, Matthew; McKone, Thomas E.; Mackay, Don

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Geothermal Exploration Using Surface Mercury Geochemistry | Open Energy  

Open Energy Info (EERE)

Surface Mercury Geochemistry Surface Mercury Geochemistry Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Geothermal Exploration Using Surface Mercury Geochemistry Details Activities (5) Areas (3) Regions (0) Abstract: Shallow, soil-mercury surveys can be used effectively in exploration for geothermal resources. Soil-mercury data from six areas in Nevada, California and New Mexico are analyzed using contour maps, histogram and probability graphs. Plotting on probability graphs allows background and anomalous populations to be resolved even when considerable overlap between populations is present. As is shown in several examples, separate soil-mercury populations can be plausibly interpreted. Mercury data can significantly enhance the structural understanding of a prospect

242

Atmospheric mercury in Changbai Mountain area, northeastern China I. The seasonal distribution pattern of total gaseous mercury and its potential sources  

SciTech Connect

An intensive field campaign for the measurement of total gaseous mercury (TGM) concentrations in ambient air was conducted in Changbai Mountain area from 5 August 2005 to 5 July 2006 using an automatic atmospheric mercury analyzer (Tekran 2537A), which was the first time TGM was monitored at a remote area in northeastern China. 99% of the hourly TGM concentrations fell between 1.28 and 9.49 ng m{sup -3} with an annual arithmetic mean of 3.58{+-}1.78 ng m{sup -3}, which was significantly elevated compared to values obtained in remote areas of Europe and North America. Seasonal mean TGM concentrations displayed a descending trend as follows: winter, spring, fall, and summer. Compared to spring/winter, TGM concentrations were lower in the summer/fall but the standard deviation (SD) of TGM levels was higher and indicated a correlation with anthropogenic emissions. TGM concentrations showed seasonal differences with respect to meteorological parameters: TGM levels in spring/winter were most correlated with wind speed, and correlated with solar radiation only in the winter, while TGM levels in summer/fall periods were most correlated with air temperature. There was a strong diurnal variation of seasonal TGM with significantly higher concentrations in daytime/nighttime compared to the early morning. The seasonal diel TGM pattern indicated regional biofuel and coal combustion were the primary mercury sources.

Wan Qi [State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Feng Xinbin [State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 (China)], E-mail: fengxinbin@vip.skleg.cn; Lu, Julia [Department of Chemistry and Biology, Ryerson University, Toronto, Ont., M5B 2K3 (Canada)], E-mail: Julialu@ryerson.ca; Zheng Wei [State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 (China); Graduate University of Chinese Academy of Sciences, Beijing 100049 (China); Song Xinjie [Department of Chemistry and Biology, Ryerson University, Toronto, Ont., M5B 2K3 (Canada); Han Shijie; Xu Hao [Open Research Station of Changbai Mountain Forest Ecosystems, Chinese Academy of Sciences, Yanbian 133613 (China)

2009-04-15T23:59:59.000Z

243

Ambient Air Quality Criteria (Manitoba, Canada)  

Energy.gov (U.S. Department of Energy (DOE))

The Manitoba Ambient Air Quality Criteria schedule lists maximum time-based pollutant concentration levels for the protection and preservation of ambient air quality within the Province of Manitoba...

244

Analysis of mercury diffusion pumps  

SciTech Connect

Several mercury diffusion pump stages in the Tritium Purification process at the Savannah River Site (SRS) have been removed from service for scheduled preventive maintenance. These stages have been examined to determine if failure has occurred. Evidence of fatigue around the flange portion of the pump has been seen. In addition, erosion and cavitation inside the throat of the venturi tube and corrosion on the other surface of the venturi tube has been observed. Several measures are being examined in an attempt to improve the performance of these pumps. These measures, as well as the noted observations, are described. 4 refs.

Dunn, K.A.

1991-12-31T23:59:59.000Z

245

Analysis of mercury diffusion pumps  

SciTech Connect

Several mercury diffusion pump stages in the Tritium Purification process at the Savannah River Site (SRS) have been removed from service for scheduled preventive maintenance. These stages have been examined to determine if failure has occurred. Evidence of fatigue around the flange portion of the pump has been seen. In addition, erosion and cavitation inside the throat of the venturi tube and corrosion on the other surface of the venturi tube has been observed. Several measures are being examined in an attempt to improve the performance of these pumps. These measures, as well as the noted observations, are described. 4 refs.

Dunn, K.A.

1991-01-01T23:59:59.000Z

246

Treatment of mercury containing waste  

DOE Patents (OSTI)

A process is provided for the treatment of mercury containing waste in a single reaction vessel which includes a) stabilizing the waste with sulfur polymer cement under an inert atmosphere to form a resulting mixture and b) encapsulating the resulting mixture by heating the mixture to form a molten product and casting the molten product as a monolithic final waste form. Additional sulfur polymer cement can be added in the encapsulation step if needed, and a stabilizing additive can be added in the process to improve the leaching properties of the waste form.

Kalb, Paul D. (Wading River, NY); Melamed, Dan (Gaithersburg, MD); Patel, Bhavesh R (Elmhurst, NY); Fuhrmann, Mark (Babylon, NY)

2002-01-01T23:59:59.000Z

247

Ambient pressure fuel cell system  

DOE Patents (OSTI)

An ambient pressure fuel cell system is provided with a fuel cell stack formed from a plurality of fuel cells having membrane/electrode assemblies (MEAs) that are hydrated with liquid water and bipolar plates with anode and cathode sides for distributing hydrogen fuel gas and water to a first side of each one of the MEAs and air with reactant oxygen gas to a second side of each one of the MEAs. A pump supplies liquid water to the fuel cells. A recirculating system may be used to return unused hydrogen fuel gas to the stack. A near-ambient pressure blower blows air through the fuel cell stack in excess of reaction stoichiometric amounts to react with the hydrogen fuel gas.

Wilson, Mahlon S. (Los Alamos, NM)

2000-01-01T23:59:59.000Z

248

Moments of ambient Doppler spectra  

DOE Green Energy (OSTI)

The author studied the first four moments (center of mass, standard deviation, skew, and kurtosis) of the Doppler spectra in ambient regions of LLNL-Hughes real aperture radar data collected during WCSEX91--92. The goal was to correlate trends in the moments with wind velocity and direction. Although the center of mass appears to increase when the wind is blowing into the radar antenna, no other conclusions have been drawn from the higher order moments.

Lehman, S.K.

1993-03-23T23:59:59.000Z

249

Dissolved gaseous mercury behavior in shallow water estuaries  

E-Print Network (OSTI)

The formation of dissolved gaseous mercury (DGM) can be an important pathway for mercury removal from an aquatic environment. DGM evasional fluxes from an aquatic system can account for up to 95% of atmospheric Hg and its deposition pathways. While this makes DGM an important species of mercury to investigate, the difficulty of accurately analyzing DGM has prevented many from studying it. In this study, DGM was measured in two different types of estuarine environments and with two different methods, discrete and continuous analysis. The discrete technique works reasonably well and is reproducible, but it does not allow one to observe rapid changes in DGM concentration due to long analysis times (~2 hr per sample). When used in this study, the discrete sampling technique agreed well with the continuous technique for Offatts Bayou, Galveston, Texas, and Georgiana Slough in the California Bay-Delta region. The average DGM concentration during the March continuous study at Offatts Bayou was 25.3 ± 8.8 pg L-1. This is significantly higher than the average DGM concentration from Georgiana Slough during late March 2006 (9.6 ± 6.6 pg L-1). DGM seemed to correlate best with photosynthetically active radiation (PAR) data in every study, suggesting that the primary control of its formation is solar irradiation. Stronger positive correlations with PAR were seen when DGM data was shifted back one hour, indicating that mercury photoreactions take time to complete. DGM also correlated positively with wind speed in most instances. However, increased wind speed should enhance air to water transfer of elemental mercury, thus one would expect a negative correlation. DGM co-varied negatively with salinity during the continuous studies, suggesting that the DGM pool is reduced in surface waters by chloride mediated oxidation. Three predictive flux models were used in the study to assess the potential for DGM water to air transfer. For both the Georgiana Slough and Offatts Bayou studies, the predicted flux dropped to or below zero after sunset. This study does contribute to the understanding of DGM cycling in aquatic environments as there are few studies that have made continuous DGM measurements in estuarine environments.

Landin, Charles Melchor

2007-12-01T23:59:59.000Z

250

Dissolved gaseous mercury behavior in shallow water estuaries  

E-Print Network (OSTI)

The formation of dissolved gaseous mercury (DGM) can be an important pathway for mercury removal from an aquatic environment. DGM evasional fluxes from an aquatic system can account for up to 95% of atmospheric Hg and its deposition pathways. While this makes DGM an important species of mercury to investigate, the difficulty of accurately analyzing DGM has prevented many from studying it. In this study, DGM was measured in two different types of estuarine environments and with two different methods, discrete and continuous analysis. The discrete technique works reasonably well and is reproducible, but it does not allow one to observe rapid changes in DGM concentration due to long analysis times (~2 hr per sample). When used in this study, the discrete sampling technique agreed well with the continuous technique for Offatts Bayou, Galveston, Texas, and Georgiana Slough in the California Bay-Delta region. The average DGM concentration during the March continuous study at Offatts Bayou was 25.3 + 8.8 pg L-1. This is significantly higher than the average DGM concentration from Georgiana Slough during late March 2006 (9.6 + 6.6 pg L-1). DGM seemed to correlate best with photosynthetically active radiation (PAR) data in every study, suggesting that the primary control of its formation is solar irradiation. Stronger positive correlations with PAR were seen when DGM data was shifted back one hour, indicating that mercury photoreactions take time to complete. DGM also correlated positively with wind speed in most instances. However, increased wind speed should enhance air to water transfer of elemental mercury, thus one would expect a negative correlation. DGM co-varied negatively with salinity during the continuous studies, suggesting that the DGM pool is reduced in surface waters by chloride mediated oxidation. Three predictive flux models were used in the study to assess the potential for DGM water to air transfer. For both the Georgiana Slough and Offatts Bayou studies, the predicted flux dropped to or below zero after sunset. This study does contribute to the understanding of DGM cycling in aquatic environments as there are few studies that have made continuous DGM measurements in estuarine environments.

Landin, Charles Melchor

2007-12-01T23:59:59.000Z

251

Guidelines for Mercury Measurements Using the Ontario Hydro Method  

Science Conference Proceedings (OSTI)

The Clean Air Mercury Rule (CAMR) requires measurement of mercury emissions from coal-fired power plants. The rule requires that all coal-fired power plants emitting >29 lb of mercury per year install continuous mercury measurement technology. Either a continuous mercury monitor (CMM) or sorbent traps meeting the requirements of 40 Code of Federal Regulations (CFR) Part 75, Appendix K, protocols must be used. To ensure the technologies are operating properly, CAMR also requires that a relative accuracy t...

2007-08-28T23:59:59.000Z

252

Review: Ambient intelligence: Technologies, applications, and opportunities  

Science Conference Proceedings (OSTI)

Ambient intelligence is an emerging discipline that brings intelligence to our everyday environments and makes those environments sensitive to us. Ambient intelligence (AmI) research builds upon advances in sensors and sensor networks, pervasive computing, ... Keywords: Ambient intelligence, Artificial intelligence, Context awareness, Decision making, Privacy, Sensors

Diane J. Cook; Juan C. Augusto; Vikramaditya R. Jakkula

2009-08-01T23:59:59.000Z

253

Development of Mercury Oxidation Catalyst for Enhanced Mercury Capture by Wet FGD  

Science Conference Proceedings (OSTI)

This document describes recent progress on a mercury control technology development program co-funded by EPRI, the U.S. Department of Energy’s National Energy Technology Laboratory (DOE-NETL), and several EPRI-member companies. The mercury control process under development uses catalysts installed downstream of the air heater and particulate control device to promote the oxidation of elemental mercury in flue gas from coal-fired power plants that have wet lime or limestone flue gas desulfurization (FGD) ...

2007-03-13T23:59:59.000Z

254

AN EXPERIMENT ON DEHASIDDHI WITH MERCURY  

E-Print Network (OSTI)

ABSTRACT: The author experimented with the dehasiddhi using mercury. The interesting experiment is narrated in this article. The land of Bharath is the only place which developed the science dealing with the metal remedies for holistic health during the Vedic period when people in other parts of the world continued to use potions and witchcraft to cure diseases of the body. This science in Vedic language is termed rasa sastra. It uses metals such as iron, copper, silver, gold mercury, elements such as iron, copper, silver, gold mercury, elements such as sulphur, mica and other materials such as shells, pearls corals jewels, salts, etc in a purified and processed form for internal

M. P Alexander

1995-01-01T23:59:59.000Z

255

Development of new sorbents to remove mercury and selenium from flue gas. Final report, September 1, 1993--August 31, 1994  

Science Conference Proceedings (OSTI)

Mercury (Hg) and selenium (Se) are two of the volatile trace metals in coal, which are often not captured by conventional gas clean up devices of coal-fired boilers. An alternative is to use sorbents to capture the volatile components of trace metals after coal combustion. In this project sorbent screening tests were performed in which ten sorbents were selected to remove metallic mercury in N{sub 2}. These sorbents included activated carbon, char prepared from Ohio No. 5 coal, molecular sieves, silica gel, aluminum oxide, hydrated lime, Wyoming bentonite, kaolin, and Amberite IR-120 (an ion-exchanger). The sorbents were selected based on published information and B&W`s experience on mercury removal. The promising sorbent was then selected and modified for detailed studies of removal of mercury and selenium compounds. The sorbents were tested in a bench-scale adsorption facility. A known amount of each sorbent was loaded in the column as a packed bed. A carrier gas was bubbled through the mercury and selenium compounds. The vaporized species were carried by the gas and went through the sorbent beds. The amount of mercury and selenium compounds captured by the sorbents was determined by atomic absorption. Results are discussed.

Shiao, S.Y. [Babcock and Wilcox Co., Alliance, OH (United States)

1995-02-01T23:59:59.000Z

256

Mercury cleanup efforts intensify | Y-12 National Security Complex  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury cleanup efforts ... Mercury cleanup efforts ... Mercury cleanup efforts intensify Posted: February 11, 2013 - 3:31pm | Y-12 Report | Volume 9, Issue 2 | 2013 Millions of pounds of mercury were required to support Y-12's post-World War II mission of separating lithium isotopes. Cleaning up the toxic heavy metal poses many challenges, but what Y-12 is learning could help conquer mercury pollution worldwide. There's a reason you won't find mercury in many thermometers these days. Mercury is a heavy metal that occurs in several chemical forms, all of which can produce toxic effects in high enough doses. Mercury was used in the column exchange process, which Y-12 employed to produce lithium-6 from 1953 to 1962. Through process spills, system leaks and surface runoff, some 700,000 pounds of mercury have been lost to the

257

NETL: Mercury Emissions Control Technologies - Enhanced High Temperature  

NLE Websites -- All DOE Office Websites (Extended Search)

Enhanced High Temperature Mercury Oxidation and Enhanced High Temperature Mercury Oxidation and In-Situ Active Carbon Generation for Low Cost Mercury Capture Mercury oxidation phenomenon and the studies of this phenomenon have generally focused on lower temperatures, typically below 650°F. This has been based on the mercury vapor equilibrium speciation curve. The baseline extents of mercury oxidation as reported in the ICR dataset and observed during subsequent tests has shown a tremendous amount of scatter. The objective of this project is to examine, establish and demonstrate the effect of higher temperature kinetics on mercury oxidation rates. Further, it is the objective of this project to demonstrate how the inherent mercury oxidation kinetics can be influenced to dramatically increase the mercury oxidation.

258

Why 25?? and Y-12 mercury losses  

NLE Websites -- All DOE Office Websites (Extended Search)

"25"? and Y-12 mercury losses Recently I learned something new regarding the "shortcut names" or code names for uranium-235 and plutonium-239. It seems the codes used to discuss...

259

Filter for isotopic alteration of mercury vapor  

DOE Green Energy (OSTI)

A filter for enriching the .sup.196 Hg content of mercury, including a reactor, a low pressure electric discharge lamp containing a fill of mercury and an inert gas. A filter is arranged concentrically around the lamp. The reactor is arranged around said filter, whereby radiation from said lamp passes through the filter and into said reactor. The lamp, the filter and the reactor are formed of quartz, and are transparent to ultraviolet light. The .sup.196 Hg concentration in the mercury fill is less than that which is present in naturally occurring mercury, that is less than about 0.146 atomic weight percent. Hydrogen is also included in the fill and serves as a quenching gas in the filter, the hydrogen also serving to prevent disposition of a dark coating on the interior of the filter.

Grossman, Mark W. (Belmont, MA); George, William A. (Gloucestor, MA)

1989-01-01T23:59:59.000Z

260

Filter for isotopic alteration of mercury vapor  

DOE Patents (OSTI)

A filter is described for enriching the [sup 196]Hg content of mercury, including a reactor, a low pressure electric discharge lamp containing a fill of mercury and an inert gas. A filter is arranged concentrically around the lamp. The reactor is arranged around said filter, whereby radiation from said lamp passes through the filter and into said reactor. The lamp, the filter and the reactor are formed of quartz, and are transparent to ultraviolet light. The [sup 196]Hg concentration in the mercury fill is less than that which is present in naturally occurring mercury, that is, less than about 0.146 atomic weight percent. Hydrogen is also included in the fill and serves as a quenching gas in the filter, the hydrogen also serving to prevent disposition of a dark coating on the interior of the filter. 9 figs.

Grossman, M.W.; George, W.A.

1989-06-13T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

NETL: News Release - Meeting Mercury Standards  

NLE Websites -- All DOE Office Websites (Extended Search)

June 18, 2001 June 18, 2001 Meeting Mercury Standards DOE Selects 6 Projects to Develop Cost-Saving Technologies for Curbing Mercury Emissions from Coal Power Plants Power Plant with Fish - MORGANTOWN, WV - With President Bush's National Energy Plan calling for mandatory reductions in the release of mercury from electric power plants - part of the Plan's multi-pollutant reduction strategy - the U.S. Department of Energy today named six new projects to develop innovative technologies that can curb mercury emissions from coal plants more effectively and at a fraction of today's costs. The winning projects were submitted by the University of North Dakota's Energy & Environmental Research Center in Grand Forks; URS Group. Inc., of Austin, TX; CONSOL, Inc., of Library, PA; Southern Research Institute in

262

ZZ Mercury Storage Book.indb  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2 2 Comment Response Document Environmental Impact Statement Final Final Environmental Impact Statement DOE/EIS-0423 January 2011 Long-Term Management and Storage of Elemental Mercury Long-Term Management and Storage of Elemental Mercury For additional information on this Final Mercury Storage EIS, contact: AVAILABILITY OF THIS FINAL LONG-TERM MANAGEMENT AND STORAGE OF ELEMENTAL MERCURY ENVIRONMENTAL IMPACT STATEMENT David Levenstein, Document Manager Office of Environmental Compliance (EM-41) U.S. Department of Energy Post Office Box 2612 Germantown, MD 20874 Website: http://www.mercurystorageeis.com Fax: 877-274-5462 Printed with soy ink on recycled paper Cover Sheet Lead Agency: U.S. Department of Energy (DOE) Cooperating Agencies: U.S. Environmental Protection Agency (EPA)

263

Analysis of Alternative Mercury Control Strategies  

Reports and Publications (EIA)

This analysis responds to a September 14, 2004, request from Chairmen James M. Inhofe and George V. Voinovich asking the Energy Information Administration (EIA) to analyze the impacts of different approaches for removing mercury from coal-fired power plants.

Alan Beamon

2005-01-01T23:59:59.000Z

264

Mercury sorbent delivery system for flue gas  

DOE Patents (OSTI)

The invention presents a device for the removal of elemental mercury from flue gas streams utilizing a layer of activated carbon particles contained within the filter fabric of a filter bag for use in a flue gas scrubbing system.

Klunder; ,Edgar B. (Bethel Park, PA)

2009-02-24T23:59:59.000Z

265

NETL: Mercury Emissions Control Technologies - Utilization of...  

NLE Websites -- All DOE Office Websites (Extended Search)

for mercury removal is produced from coal in a gasification process in-situ at coal burning plant. The main objective of this project is to obtained technical information...

266

Remediation of Mercury and Industrial Contaminants  

Energy.gov (U.S. Department of Energy (DOE))

The mission of the Remediation of Mercury and Industrial Contaminants Applied Field Research Initiative is to control the flux of contaminants in soil and water environments for the purpose of...

267

Enhanced Elemental Mercury Removal from Coal-fired Flue Gas by Sulfur-chlorine Compounds  

E-Print Network (OSTI)

of Catalysts for Oxidation of Mercury in Flue Gas, Environ.mercury oxidation when the chlorine concentration in flue gas

Miller, Nai-Qiang Yan-Zan Qu Yao Chi Shao-Hua Qiao Ray Dod Shih-Ger Chang Charles

2008-01-01T23:59:59.000Z

268

Symplectic Integrator Mercury: Bug Report  

E-Print Network (OSTI)

We report on a problem found in MERCURY, a hybrid symplectic integrator used for dynamical problems in Astronomy. The variable that keeps track of bodies' statuses is uninitialised, which can result in bodies disappearing from simulations in a non-physical manner. Some FORTRAN compilers implicitly initialise variables, preventing simulations from having this problem. With other compilers, simulations with a suitably large maximum number of bodies parameter value are also unaffected. Otherwise, the problem manifests at the first event after the integrator is started, whether from scratch or continuing a previously stopped simulation. Although the problem does not manifest in some conditions, explicitly initialising the variable solves the problem in a permanent and unconditional manner.

K. de Souza Torres; D. R. Anderson

2008-08-04T23:59:59.000Z

269

Why mercury prefers soft ligands  

Science Conference Proceedings (OSTI)

Mercury (Hg) is a major global pollutant arising from both natural and anthropogenic sources. Defining the factors that determine the relative affinities of different ligands for the mercuric ion, Hg2+, is critical to understanding its speciation, transformation, and bioaccumulation in the environment. Here, we use quantum chemistry to dissect the relative binding free energies for a series of inorganic anion complexes of Hg2+. Comparison of Hg2+ ligand interactions in the gaseous and aqueous phases shows that differences in interactions with a few, local water molecules led to a clear periodic trend within the chalcogenide and halide groups and resulted in the well-known experimentally observed preference of Hg2+ for soft ligands such as thiols. Our approach establishes a basis for understanding Hg speciation in the biosphere.

Riccardi, Demian M [ORNL] [ORNL; Guo, Hao-Bo [ORNL] [ORNL; Gu, Baohua [ORNL] [ORNL; Parks, Jerry M [ORNL] [ORNL; Summers, Anne [University of Georgia, Athens, GA] [University of Georgia, Athens, GA; Miller, S [University of California, San Francisco] [University of California, San Francisco; Liang, Liyuan [ORNL] [ORNL; Smith, Jeremy C [ORNL] [ORNL

2013-01-01T23:59:59.000Z

270

SCR Catalyst Management for Mercury Control  

Science Conference Proceedings (OSTI)

A number of EPRI projects conducted over the past several years have examined the effects of SCR catalyst on mercury speciation. These projects have focused on the various factors influencing mercury oxidation, related to both the flue gas conditions and the catalysts themselves. However, the majority of these studies have only examined the speciation at the SCR inlet and outlet. Much less is known about the interlayer speciation, however, which is very important when developing catalyst management ...

2012-11-16T23:59:59.000Z

271

Daily mercury intake in fish-eating populations in the Brazilian Amazon CARLOS JOSE SOUSA PASSOSa,d  

E-Print Network (OSTI)

Although high levels of fish consumption and bioindicators of mercury exposure have been reported-sectional dietary survey on fish and fruit consumption frequency was carried out with 256 persons from six villages, the average quantity of fish per meal, fish-species frequency consumption and participants' body weight. Fish

Mucci, Alfonso

272

Article Removal of Mercury by Foam Fractionation Using Surfactin,  

E-Print Network (OSTI)

Abstract: The separation of mercury ions from artificially contaminated water by the foam fractionation process using a biosurfactant (surfactin) and chemical surfactants (SDS and Tween-80) was investigated in this study. Parameters such as surfactant and mercury concentration, pH, foam volume, and digestion time were varied and their effects on the efficiency of mercury removal were investigated. The recovery efficiency of mercury ionsInt. J. Mol. Sci. 2011, 12 8246 was highly sensitive to the concentration of the surfactant. The highest mercury ion recovery by surfactin was obtained using a surfactin concentration of 10 Ś CMC, while recovery using SDS required 10 Ś CMC. However, the enrichment of mercury

A Biosurfactant; Hau-ren Chen; Chien-cheng Chen; A. Satyanarayana Reddy; Chien-yen Chen; Wun Rong Li; Min-jen Tseng; Hung-tsan Liu; Wei Pan; Jyoti Prakash Maity; Shashi B. Atla

2011-01-01T23:59:59.000Z

273

Effects of HCl and SO{sub 2} concentration on mercury removal by activated carbon sorbents in coal-derived flue gas  

Science Conference Proceedings (OSTI)

The effect of the presence of HCl and SO{sub 2} in the simulated coal combustion flue gas on the Hg{sup 0} removal by a commercial activated carbon (coconut shell AC) was investigated in a laboratory-scale fixed-bed reactor in a temperature range of 80-200{sup o}C. The characteristics (thermal stability) of the mercury species formed on the sorbents under various adsorption conditions were investigated by the temperature-programmed decomposition desorption (TPDD) technique. It was found that the presence of HCl and SO{sub 2} in the flue gas affected the mercury removal efficiency of the sorbents as well as the characteristics of the mercury adsorption species. The mercury removal rate of AC increased with the HCl concentration in the flue gas. In the presence of HCl and the absence of SO{sub 2} during Hg{sup 0} adsorption by AC, a single Hg{sup 0} desorption peak at around 300{sup o}C was observed in the TPDD spectra and intensity of this peak increased with the HCl concentration during mercury adsorption. The peak at around 300{sup o}C may be derived from the decomposition and desorption of mercury chloride species. The presence of SO{sub 2} during mercury adsorption had an adverse effect on the mercury removal by AC in the presence of HCl. In the presence of both HCl and SO{sub 2} during Hg{sup 0} adsorption by AC, the major TPDD peak temperatures changed drastically depending upon the concentration of HCl and SO{sub 2} in flue gas during Hg{sup 0} adsorption. 16 refs., 7 figs.

Ryota Ochiai; M. Azhar Uddin; Eiji Sasaoka; Shengji Wu [Okayama University, Okayama (Japan). Faculty of Environmental Science and Technology

2009-09-15T23:59:59.000Z

274

Evaluation of the Emission, Transport, and Deposition of Mercury, Arsenic, and Fine Particulate Matter From Coal-Based Power Plants in the Ohio River Valley  

NLE Websites -- All DOE Office Websites (Extended Search)

Kevin crist Kevin crist Principal Investigator Ohio University Research and Technology Center Athens, OH 45701 740-593-4751 cristk@ohiou.edu Environmental and Water Resources Evaluation of thE Emission, transport, and dEposition of mErcury, arsEnic, and finE particulatE mattEr from coal-BasEd powEr plants in thE ohio rivEr vallEy rEgion Background The U.S. Department of Energy's National Energy Technology Laboratory (NETL) has established an aggressive research initiative to address the technical and scientific issues surrounding the impact of coal-based power systems on ambient levels of fine particulate matter (PM 2.5 ), nitrogen oxides (NO X ), mercury/air toxics, and acid gases. Regulatory drivers such as the 1990 Clean Air Act Amendments, the 1997 revised National Ambient Air Quality Standards, and the 2005 Clean Air

275

Sensitive Species  

NLE Websites -- All DOE Office Websites (Extended Search)

Sensitive Species Sensitive Species Sensitive Species By avoiding or minimizing the impact of Laboratory activities on sensitive species, LANL can potentially reduce the possibility of these species being upgraded to federal protection. April 12, 2012 sensitive species The bald eagle is one of our sensitive species. Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email Sensitive species are plants and animals that are protected at the state or local level. Keeping sensitive species safe We strive to minimize the impact of Laboratory operations on sensitive species, which are plants and animals not protected by the federal Endangered Species Act or the Migratory Bird Treaty Act, but are protected on state or local levels.

276

Ambient Air Quality Standards (New Jersey)  

Energy.gov (U.S. Department of Energy (DOE))

This article lists specific standards for ambient air quality standards for particulate matter, sulfur dioxide, carbon monoxide, ozone, lead and nitrogen dioxide.

277

Thermoelectric Ambient Energy Harvester - Energy Innovation Portal  

A novel thermoelectric generator (TEG) design by PNNL allows the conversion of ambient thermal energy into electric power for a variety of low-power uses. These ...

278

On the oscillations in Mercury's obliquity  

E-Print Network (OSTI)

One major objective of MESSENGER and BepiColombo spatial missions is to accurately measure Mercury's rotation and its obliquity in order to obtain constraints on internal structure of the planet. Which is the obliquity's dynamical behavior deriving from a complete spin-orbit motion of Mercury simultaneously integrated with planetary interactions? We have used our SONYR model integrating the spin-orbit N-body problem applied to the solar System (Sun and planets). For lack of current accurate observations or ephemerides of Mercury's rotation, and therefore for lack of valid initial conditions for a numerical integration, we have built an original method for finding the libration center of the spin-orbit system and, as a consequence, for avoiding arbitrary amplitudes in librations of the spin-orbit motion as well as in Mercury's obliquity. The method has been carried out in two cases: (1) the spin-orbit motion of Mercury in the 2-body problem case (Sun-Mercury) where an uniform precession of the Keplerian orbital plane is kinematically added at a fixed inclination (S2K case), (2) the spin-orbit motion of Mercury in the N-body problem case (Sun and planets) (Sn case). We find that the remaining amplitude of the oscillations in the Sn case is one order of magnitude larger than in the S2K case, namely 4 versus 0.4 arcseconds (peak-to-peak). The mean obliquity is also larger, namely 1.98 versus 1.80 arcminutes, for a difference of 10.8 arcseconds. These theoretical results are in a good agreement with recent radar observations but it is not excluded that it should be possible to push farther the convergence process by drawing nearer still more precisely to the libration center.

E. Bois; N. Rambaux

2007-09-07T23:59:59.000Z

279

Evaluation of Sorbent Injection for Mercury Control  

Science Conference Proceedings (OSTI)

The power industry in the U.S. is faced with meeting new regulations to reduce the emissions of mercury compounds from coal-fired plants. These regulations are directed at the existing fleet of nearly 1,100 boilers. These plants are relatively old with an average age of over 40 years. Although most of these units are capable of operating for many additional years, there is a desire to minimize large capital expenditures because of the reduced (and unknown) remaining life of the plant to amortize the project. Injecting a sorbent such as powdered activated carbon into the flue gas represents one of the simplest and most mature approaches to controlling mercury emissions from coal-fired boilers. This is the final site report for tests conducted at Laramie River Station Unit 3, one of five sites evaluated in this DOE/NETL program. The overall objective of the test program is to evaluate the capabilities of activated carbon injection at five plants: Sunflower Electric's Holcomb Station Unit 1, AmerenUE's Meramec Station Unit 2, Missouri Basin Power Project's Laramie River Station Unit 3, Detroit Edison's Monroe Power Plant Unit 4, and AEP's Conesville Station Unit 6. These plants have configurations that together represent 78% of the existing coal-fired generation plants. The goals for the program established by DOE/NETL are to reduce the uncontrolled mercury emissions by 50 to 70% at a cost 25 to 50% lower than the benchmark established by DOE of $60,000/lb mercury removed. The goals of the program were exceeded at Laramie River Station by achieving over 90% mercury removal at a sorbent cost of $3,980/lb ($660/oz) mercury removed for a coal mercury content of 7.9 lb/TBtu.

Sharon Sjostrom

2005-12-30T23:59:59.000Z

280

DOE Issues Final Mercury Storage Environmental Impact Statement: Texas Site  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE Issues Final Mercury Storage Environmental Impact Statement: DOE Issues Final Mercury Storage Environmental Impact Statement: Texas Site Is Preferred for Long-Term Mercury Storage DOE Issues Final Mercury Storage Environmental Impact Statement: Texas Site Is Preferred for Long-Term Mercury Storage January 19, 2011 - 12:00pm Addthis Media Contact (202) 586-4940 WASHINGTON - The Department of Energy has prepared a Final Long-Term Management and Storage of Elemental Mercury Environmental Impact Statement to analyze the potential environmental, human health, and socioeconomic impacts of elemental mercury storage at seven locations. Based on these factors, DOE identified the Waste Control Specialists, LLC, site near Andrews, Texas, as the preferred alternative for long-term management and storage of mercury. DOE will consider the environmental impact information presented in this

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Laser altimeter measurements from MESSENGER's recent mercury flybys  

E-Print Network (OSTI)

The performance of the Mercury Laser Altimeter is reported from MESSENGER's flybys of Mercury in January and October 2008. The instrument ranged to 600 km at >60deg incidence angle and 1600 km in nadir direction.

Sun, Xiaoli

282

Seismic effects of the Caloris basin impact, Mercury  

E-Print Network (OSTI)

Striking geological features on Mercury's surface have been linked to tectonic disruption associated with the Caloris impact and have the potential to provide information on the interior structure of Mercury. The unusual ...

Lü, Jiangning

2011-01-01T23:59:59.000Z

283

Mitigation and Remediation of Mercury Contamination at the Y...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Mitigation and Remediation of Mercury Contamination at the Y-12 Plant Oak Ridge Mitigation and Remediation of Mercury Contamination at the Y-12 Plant Oak Ridge Full Document and...

284

VEE-0020 - In the Matter of Mercury Fuel Service, Inc.  

Energy.gov (U.S. Department of Energy (DOE))

On April 9, 1996, Mercury Fuel Service, Inc. (Mercury) of Waterbury, Connecticut, filed an Application for Exception with the Office of Hearings and Appeals (OHA) of the Department of Energy (DOE)....

285

Mercurial commitments with applications to zero-knowledge sets  

Science Conference Proceedings (OSTI)

We introduce a new flavor of commitment schemes, which we call mercurial commitments. Informally, mercurial commitments are standard commitments that have been extended to allow for soft decommitment. Soft decommitments, on the one hand, ...

Melissa Chase; Alexander Healy; Anna Lysyanskaya; Tal Malkin; Leonid Reyzin

2005-05-01T23:59:59.000Z

286

Mercury Vapor At Kawaihae Area (Thomas, 1986) | Open Energy Information  

Open Energy Info (EERE)

Mercury Vapor At Kawaihae Area (Thomas, 1986) Mercury Vapor At Kawaihae Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Kawaihae Area (Thomas, 1986) Exploration Activity Details Location Kawaihae Area Exploration Technique Mercury Vapor Activity Date Usefulness not useful DOE-funding Unknown Notes The soil geochemistry yielded quite complex patterns of mercury concentrations and radonemanation rates within the survey area (Cox and Cuff, 1981c). Mercury concentrations (Fig. 38) showed a general minimum along the Kawaihae-Waimea roads and a broad trend of increasing mercury concentrations toward both the north and south. There is no correlation apparent between the mercury patterns and either the resistivity sounding data or the surface geology in the area. The radon emanometry data (Fig.

287

Development of a method for the speciation of source mercury emissions  

SciTech Connect

In a study conducted at the Research Triangle Institute (RTI), funded through an EPA cooperative agreement, RTI and EPA researchers sought to identify a stationary source mercury (Hg) speciation method that is applicable to both fossil fuel and waste combustion processes. Initial research included the bench-scale evaluation of EPA Method 29, as well as the identification of other potential impinger solution reagents and methods capable of selectively capturing and preserving mercury species. A relatively simple speciation/collection approach for Hg emissions from fossil fuel combustion was developed that employed impingers containing deionized water (Draft Method 101B) upstream of the Method 29 peroxide solution. Recent work by RTI and EPA has focused on the evaluation of a dilute sodium hydroxide impinger solution to replace the water used in Draft Method 101B. Results obtained to date from both bench tests and pilot-scale combustion tests indicate that the alkaline mercury speciation method (AMS) is highly effective at speciating elemental and ionic mercury emissions in the presence of Cl{sub 2} concentrations up to 20 ppmv and SO{sub 2} levels exceeding 1,500 ppmv. Other potential interferences investigated during the study were hydrogen chloride, nitric oxide, carbon dioxide, and moisture.

Giglio, J.J.; O`Rourke, J.A.; Grohse, P.M.; Wilshire, F.; Ryan, J.

1998-04-21T23:59:59.000Z

288

OFF-GAS MERCURY CONTROL USING SULFUR-IMPREGNATED ACTIVATED CARBON – TEST RESULTS  

SciTech Connect

Several laboratory and pilot-scale tests since the year 2000 have included demonstrations of off-gas mercury control using fixed bed, sulfur-impregnated activated carbon. These demonstrations have included operation of carbon beds with gas streams containing a wide range of mercury and other gas species concentrations representing off-gas from several U.S. Department of Energy (DOE) mixed waste treatment processes including electrical resistance heated (joule-heated) glass melters, fluidized bed calciners, and fluidized bed steam reformers. Surrogates of various DOE mixed waste streams (or surrogates of offgas from DOE mixed waste streams) including INL “sodium bearing waste” (SBW), liquid “low activity waste” (LAW) from the Pacific Northwest National Laboratory, and liquid waste from Savannah River National Laboratory (“Tank 48H waste”) have been tested. Test results demonstrate mercury control efficiencies up to 99.999%, high enough to comply with the Hazardous Waste (HWC) Combustor Maximum Achievable Control Technology (MACT) standards even when the uncontrolled off-gas mercury concentrations exceed 400,000 ug/dscm (at 7% O2), and confirm carbon bed design parameters for such high efficiencies. Results of several different pilot-scale and engineering-scale test programs performed over several years are presented and compared.

Nick Soelberg

2007-05-01T23:59:59.000Z

289

NIST: Mercury, Atomic Ref. Data for Elect. Struct. Calc.  

Science Conference Proceedings (OSTI)

Table of contents logo, Atomic Reference Data for Electronic Structure Calculations. Mercury. Key to notation | HTML table ...

290

Mercury in Nelson’s Sparrow Subspecies at Breeding Sites  

E-Print Network (OSTI)

Background: Mercury is a persistent, biomagnifying contaminant that can cause negative effects on ecosystems. Marshes are often areas of relatively high mercury methylation and bioaccumulation. Nelson’s Sparrows (Ammodramus nelsoni) use marsh habitats year-round and have been documented to exhibit tissue mercury concentrations that exceed negative effects thresholds. We sought to further characterize the potential risk of Nelson’s Sparrows to mercury exposure by sampling individuals from sites within the range of each of its subspecies.

Virginia L Winder; Steven D. Emslie

2012-01-01T23:59:59.000Z

291

U.S. Mercury Deposition Under Alternative Regulatory Scenarios  

Science Conference Proceedings (OSTI)

The Federal Clean Air Mercury Rule regulates electric utility mercury emissions while permitting individual states to enact stricter rules at their discretion. Computer modeling has shown how mercury deposition patterns will change if all regulated utility power plants follow the Federal rule, vs. alternative state rules. These patterns of deposition can be compared to the limiting case: what if all U.S. utility mercury emissions were zeroed out? The findings show that regulations stricter than the Feder...

2007-12-14T23:59:59.000Z

292

Selective Catalytic Reduction Mercury Oxidation Data to Support Catalyst Management  

Science Conference Proceedings (OSTI)

Selective catalytic reduction (SCR) mercury oxidation can be pivotal for Mercury and Air Toxics Standards compliance, especially for those units that rely on co-benefits as their primary method of mercury control. Much work has been done historically to understand the mercury behavior across SCRs, especially as a function of operating conditions, and in particular, flue gas composition. The present work seeks to integrate the accumulated knowledge into a practical document that will aid utilities in ...

2013-11-13T23:59:59.000Z

293

Bench-scale studies with mercury contaminated SRS soil  

SciTech Connect

Bench-scale studies with mercury contaminated soil were performed at the SRTC to determine the optimum waste loading obtainable in the glass product without sacrificing durability, leach resistance, and processability. Vitrifying this waste stream also required offgas treatment for the capture of the vaporized mercury. Four soil glasses with slight variations in composition were produced, which were capable of passing the Product Consistency Test (PCT) and the Toxicity Characteristic Leaching Procedure (TCLP). The optimum glass feed composition contained 60 weight percent soil and produced a soda-lime-silica glass when melted at 1,350 C. The glass additives used to produce this glass were 24 weight percent Na{sub 2}CO{sub 3} and 16 weight percent CaCO{sub 3}. Volatilized mercury released during the vitrification process was released to the proposed mercury collection system. The proposed mercury collection system consisted of quartz and silica tubing with a Na{sub 2}S wash bottle followed by a NaOH wash bottle. Once in the system, the volatile mercury would pass through the wash bottle containing Na{sub 2}S, where it would be converted to Hg{sub 2}S, which is a stable form of mercury. However, attempts to capture the volatilized mercury in a Na{sub 2}S solution wash bottle were not as successful as anticipated. Maximum mercury captured was only about 3.24% of the mercury contained in the feed. Mercury capture efforts then shifted to condensing and capturing the volatilized mercury. These attempts were much more successful at capturing the volatile mercury, with a capture efficiency of 34.24% when dry ice was used to pack the condenser. This captured mercury was treated on a mercury specific resin after digestion of the volatilized mercury.

Cicero, C.A.

1995-12-31T23:59:59.000Z

294

End of an Era: NIST to Cease Calibrating Mercury ...  

Science Conference Proceedings (OSTI)

... Burning of coal is a major source of vaporous mercury released into the atmosphere. Compact fluorescents use less electricity ...

2011-10-03T23:59:59.000Z

295

MERCURY HANDLING FOR THE TARGET SYSTEM FOR A MUON COLLIDER  

E-Print Network (OSTI)

Cryostat 1. Remote handling The high radiation levels and presence of hazardous, ac- tivated mercury vaporsMERCURY HANDLING FOR THE TARGET SYSTEM FOR A MUON COLLIDER Van Graves , ORNL, Oak Ridge, TN 37830 placement within the Shielding Module in a remote environment. · Providing double containment of the mercury

McDonald, Kirk

296

MERCURY CONTROL FOR MWCs USING THE SODIUM TETRASULFIDE PROCESS  

E-Print Network (OSTI)

technologies for mercury control for flue gases of Municipal Waste Combustors (MWCs) not only ecological hydrochloric acid (HCl) and elemental mercury (Hg") under oxidizing conditions of the off-gases downstream to the decreasing gas temperature, the elemental mercury is able to react with other flue gas components. The main

Columbia University

297

PEER-REVIEW An Experimental Study on Mercury Sorption by  

E-Print Network (OSTI)

flue gases. These studies have shown the relative ease of controlling oxidized mercury (specifically, Nashville, 1996 8. B. Hall, O . Lindqvist, and E. Ljungstrom, "Mercury Chemistry in Simulated Flue Gases municipal waste combustor (MWC), flue gas mercury is mainly found as HgCI2. They postulated thatHgCl2

Columbia University

298

Mercury and Dioxin Control for Municipal Waste Combustors Anthony Licata  

E-Print Network (OSTI)

) and elemental mercury (Hg«» under oxidizing conditions of the off-gases downstream of the refuse incinerator), sulfur dioxide (S02)' nitrogen oxides (NOx), carbon monoxide (CO), PCDDs/PCDFs, cadmium (Cd), mercury (Hg emission regulations. Mercury Control in MWCs The capture of Hg in flue gas cleaning devices depends on the

Columbia University

299

National Waste Processing Conference Proceedings ASME 1994 ACID GASES, MERCURY,  

E-Print Network (OSTI)

) and elemental mercury (Hg«» under oxidizing conditions of the off-gases downstream of the refuse incinerator), sulfur dioxide (S02)' nitrogen oxides (NOx), carbon monoxide (CO), PCDDs/PCDFs, cadmium (Cd), mercury (Hg emission regulations. Mercury Control in MWCs The capture of Hg in flue gas cleaning devices depends on the

Columbia University

300

Mercury Removal Characteristics of Coal-Fired Power Plants  

Science Conference Proceedings (OSTI)

The standard Ontario Hydro Method (OHM) was used into the flue gas mercury sampling before and after fabric filter (FF)/ electrostatic precipitator (ESP) locations in coal-fired power stations in China, and then various mercury speciation, Hg0, Hg2+ ... Keywords: coal-fired power plant, mercury, fabric filter, electrostatic precipitator

Yang Liguo, Fan Xiaoxu, Duanyu Feng, Wang Yunjun

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Fission modes of mercury isotopes  

E-Print Network (OSTI)

Background: Recent experiments on beta-delayed fission in the mercury-lead region and the discovery of asym- metric fission in 180 Hg [1] have stimulated theoretical interest in the mechanism of fission in heavy nuclei. Purpose: We study fission modes and fusion valleys in 180 Hg and 198 Hg to reveal the role of shell effects in pre-scission region and explain the experimentally observed fragment mass asymmetry and its variation with A. Methods: We use the self-consistent nuclear density functional theory employing Skyrme and Gogny energy density functionals. Results: The potential energy surfaces in multi-dimensional space of collective coordinates, including elongation, triaxiality, reflection-asymmetry, and necking, are calculated for 180 Hg and 198 Hg. The asymmetric fission valleys - well separated from fusion valleys associated with nearly spherical fragments - are found in in both cases. The density distributions at scission configurations are studied and related to the experimentally observed mass splits. Conclusions: The energy density functionals SkM\\ast and D1S give a very consistent description of the fission process in 180 Hg and 198 Hg. We predict a transition from asymmetric fission in 180 Hg towards more symmetric distribution of fission fragments in 198 Hg. For 180 Hg, both models yield 100 Ru/80 Kr as the most probable split. For 198 Hg, the most likely split is 108 Ru/90 Kr in HFB-D1S and 110 Ru/88 Kr in HFB-SkM\\ast.

M. Warda; A. Staszczak; W. Nazarewicz

2012-05-25T23:59:59.000Z

302

Fission Modes of Mercury Isotopes  

Science Conference Proceedings (OSTI)

Background: Recent experiments on -delayed fission in the mercury-lead region and the discovery of asymmetric fission in 180Hg [A. N. Andreyev et al., Phys. Rev. Lett. 105, 252502 (2010)] have stimulated theoretical interest in the mechanism of fission in heavy nuclei. Purpose: We study fission modes and fusion valleys in 180Hg and 198Hg to reveal the role of shell effects in the prescission region and explain the experimentally observed fragment mass asymmetry and its variation with A. Methods: We use the self-consistent nuclear density functional theory employing Skyrme and Gogny energy density functionals. Results: The potential energy surfaces in multidimensional space of collective coordinates, including elongation, triaxiality, reflection-asymmetry, and necking, are calculated for 180Hg and 198Hg. The asymmetric fission valleys well separated from fusion valleys associated with nearly spherical fragments are found in both cases. The density distributions at scission configurations are studied and related to the experimentally observed mass splits. Conclusions: The energy density functionals SkM and D1S give a very consistent description of the fission process in 180Hg and 198Hg. We predict a transition from asymmetric fission in 180Hg toward a more symmetric distribution of fission fragments in 198Hg. For 180Hg, both models yield 100Ru/80Kr as the most probable split. For 198Hg, the most likely split is 108Ru/90Kr in HFB-D1S and 110Ru/88Kr in HFB-SkM .

Warda, M. [Maria Curie-Sk?odowska University-Poland; Staszczak, A. [Maria Curie-Sklodowska University; Nazarewicz, Witold [UTK/ORNL/University of Warsaw

2012-01-01T23:59:59.000Z

303

Mercury-free fluorescent lighting  

Science Conference Proceedings (OSTI)

A brief comparative review of possible mercury free fluorescent lighting technologies is presented, including rare-gas positive column discharges, molecular discharges, and dielectric barrier discharges. Detailed experimental results on xenon positive column discharges will then be considered. In order to judge whether xenon-based discharges are a viable UV source it is necessary to measure the radiant emittance (power per unit area) for the vacuum ultraviolet (VUV) resonance xenon emission at 147 nm. Two techniques to determine the VUV radiant emittance have been developed and applied to xenon discharges. One method combines the measured resonance level density using absorption spectroscopy and a calculation of the trapped decay rate for the resonance radiation to arrive at the radiant emittance at 147 nm. A second method utilizes a direct measurement of the radiance (power per unit area per unit solid angle) at 147 nm using a calibrated VUV photodiode, and a calculation of the relative angular distribution of the resonance radiation to determine the radiant emittance. In both techniques a simulation of the transport of resonance radiation is key to determining the radiant emittance.

Doughty, D.A. [General Electric Corporate Research and Development, Schenectady, NY (United States)

1996-05-01T23:59:59.000Z

304

Mixed Waste Focus Area Mercury Working Group: An integrated approach to mercury waste treatment and disposal  

SciTech Connect

In May 1996, the US Department of Energy (DOE) Mixed Waste Focus Area (MWFA) initiated the Mercury Working Group (HgWG). The HgWG was established to address and resolve the issues associated with mercury contaminated mixed wastes. During the MWFA`s initial technical baseline development process, three of the top four technology deficiencies identified were related to the need for amalgamation, stabilization, and separation removal technologies for the treatment of mercury and mercury contaminated mixed waste. The HgWG is assisting the MWFA in soliciting, identifying, initiating, and managing efforts to address these areas. The focus of the HgWG is to better establish the mercury related treatment technologies at the DOE sites, refine the MWFA technical baseline as it relates to mercury treatment, and make recommendations to the MWFA on how to most effectively address these needs. Based on the scope and magnitude of the mercury mixed waste problem, as defined by HgWG, solicitations and contract awards have been made to the private sector to demonstrate both the amalgamation and stabilization processes using actual mixed wastes. Development efforts are currently being funded that will address DOE`s needs for separation removal processes. This paper discusses the technology selection process, development activities, and the accomplishments of the HgWG to date through these various activities.

Conley, T.B.; Morris, M.I.; Osborne-Lee, I.W.

1998-01-01T23:59:59.000Z

305

The mixed waste focus area mercury working group: an integrated approach for mercury treatment and disposal  

SciTech Connect

In May 1996, the U.S. Department of Energy (DOE) Mixed Waste Focus Area (MWFA) initiated the Mercury Work Group (HgWG), which was established to address and resolve the issues associated with mercury- contaminated mixed wastes. Three of the first four technology deficiencies identified during the MWFA technical baseline development process were related to mercury amalgamation, stabilization, and separation/removal. The HgWG will assist the MWFA in soliciting, identifying, initiating, and managing all the efforts required to address these deficiencies. The focus of the HgWG is to better establish the mercury-related treatment needs at the DOE sites, refine the MWFA technical baseline as it relates to mercury treatment, and make recommendations to the MWFA on how to most effectively address these needs. The team will initially focus on the sites with the most mercury-contaminated mixed wastes, whose representatives comprise the HgWG. However, the group will also work with the sites with less inventory to maximize the effectiveness of these efforts in addressing the mercury- related needs throughout the entire complex.

Conley, T.B.; Morris, M.I. [Oak Ridge National Lab., TN (United States); Holmes-Burns, H. [Westinghouse Savannah River Co., Aiken, SC (United States); Petersell, J. [AIMS, Inc., Golden, CO (United States); Schwendiman, L. [Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States)

1997-02-01T23:59:59.000Z

306

CORRELATION OF DNA METHYLATION WITH MERCURY CONTAMINATION IN MARINE ORGANISMS: A CASE STUDY OF NOAA MUSSEL WATCH TISSUE SAMPLES  

E-Print Network (OSTI)

American oysters (Crassostrea virginica) obtained from the NOAA Mussel Watch program were screened for DNA methylation, a type of epigenetic response to stressors. Oysters were collected from sites in the Gulf of Mexico having high mercury contamination (measured by NOAA) and from sites with little to no measurable mercury. Assessment of anthropogenic stressors such as mercury in the coastal environment has traditionally relied upon species diversity indices or assays to determine lethal doses. However, these indices fail to examine sub-lethal impacts such as gene expression. A ‘global’ DNA methylation kit, recently introduced by Sigma-Aldrich, was used to spectrophotometrically compare the degree of methylation in DNA extracted from contaminated oysters and non-contaminated oysters. DNA methylation was higher in oysters from pristine sites than in oysters from contaminated sites.

Brinkmeyer, Robin; Taylor, Robert; Germ, Kaylyn E.

2011-08-04T23:59:59.000Z

307

SPDA-Actualidad Ambiental | Open Energy Information  

Open Energy Info (EERE)

SPDA-Actualidad Ambiental SPDA-Actualidad Ambiental Jump to: navigation, search Name SPDA-Actualidad Ambiental Agency/Company /Organization Peruvian Society for Environmental Law (SPDA) Sector Energy, Land, Water, Climate Resource Type Video, Publications, Training materials, Lessons learned/best practices Website http://www.actualidadambiental UN Region Caribbean, Central America, South America References SPDA-Actualidad Ambiental[1] SPDA-Actualidad Ambiental Screenshot "SPDA current environmental journalism is a service of the Peruvian Society for Environmental Law (SPDA) , which seeks to inform about the latest news and events related to the environment in Peru and the world in search of greater awareness and action for preservation of our planet. On this site you can also obtain and use for free videos, high resolution photos and the

308

Mercury levels in Lake Powell. Bioamplification of mercury in man-made desert reservoir  

SciTech Connect

Flameless atomic absorption analyses of samples from Lake Powell yield mean mercury levels in ppb of 0.01 in water, 30 in bottom sediments, 10 in shoreline substrates, 34 in plant leaves, 145 in plant debris, 28 in algae, 10 in crayfish, and 232 in fish muscle. Trout were unique in having lower concentrations in muscle than in highly vascularized blood tissues. Concentrations increased with increased body weight and higher levels on the food chain. Muscle of some large fish over 2 kg whole body weight exceeded 500 ppb. Bioamplification of mercury up the food chain and association of mercury with organic matter are demonstrated.

Potter, L.; Kidd, D.; Standiford, D.

1975-01-01T23:59:59.000Z

309

October 2001 Mercury Report of Earth Engineering Center to New York Academy of Sciences SOURCES AND MATERIAL BALANCE OF MERCURY  

E-Print Network (OSTI)

of mercury from MWC flue gases. After MACT controls reduce total mercury emission rates by 90% or greater not address any chemical transformations affecting mercury in soil, water or sediments (oxidation, reduction Speciation in Flue Gases: Overcoming the Analytical Difficulties," Brooks Rand Ltd., Seattle, WA, Fall 1991

Columbia University

310

NETL: Mercury Emissions Control Technologies - Advanced Utility  

NLE Websites -- All DOE Office Websites (Extended Search)

Advanced Utility Mercury-Sorbent Field Testing Program Advanced Utility Mercury-Sorbent Field Testing Program Sorbent Technologies Corporation, will test an advanced halgenated activated carbon to determine the mercury removal performance and relative costs of sorbent injection for advanced sorbent materials in large-scale field trials of a variety of combinations of coal-type and utility plant-configuration. These include one site (Detroit Edison's St. Clair Station) with a cold-side ESP using subbituminous coal, or blend of subbituminous and bituminous coal, and one site (Duke Energy's Buck Plant) with a hot-side ESP which burns a bituminous coal. Related Papers and Publications: Semi-Annual Technical Progress Report for the period April 1 - October 31, 2004 [PDF-2275KB] Semi-Annual Technical Progress Report for the period of October 2003 - March 2004 [PDF-1108KB]

311

EVALUATION OF MERCURY COOLED BREEDER REACTORS  

SciTech Connect

A technical and economic evaluation of a mercury-cooled fast breeder reactor is presented. The objectives of the program were to establish the technical feasibility of a fast breeder reactor cooled with boiling mercury and to evaluate the long-range potential of such a reactor power plant for production of economic power. Details of the conceptual design of a 100-Mw(e) reactor and system are discussed. The power cost from a mercury cooled fast breeder reactor was estimated as 21.4 mills/kwh which is competitive with the power cost for the initial Enrico Fermi plant. It was concluded that this reactor concept is technically feasible and has promising long-range economic potential. (M.C.G.)

Battles, D.W.

1960-12-14T23:59:59.000Z

312

Optimized Parameters for a Mercury Jet Target  

Science Conference Proceedings (OSTI)

A study of target parameters for a high-power, liquid mercury jet target system for a neutrino factory or muon collider is presented. Using the MARS code, we simulate particle production initiated by incoming protons with kinetic energies between 2 and 100 GeV. For each proton beam energy, we maximize production by varying the geometric parameters of the target: the mercury jet radius, the incoming proton beam angle, and the crossing angle between the mercury jet and the proton beam. The number of muons surviving through an ionization cooling channel is determined as a function of the proton beam energy. We optimize the mercury jet target parameters: the mercury jet radius, the incoming proton beam angle and the crossing angle between the mercury jet and the proton beam for each proton beam energy. The optimized target radius varies from about 0.4 cm to 0.6 cm as the proton beam energy increases. The optimized beam angle varies from 75 mrad to 120 mrad. The optimized crossing angle is near 20 mrad for energies above 5 GeV. These values differ from earlier choices of 67 mrad for the beam angle and 33 mrad for the crossing angle. These new choices for the beam parameters increase the meson production by about 20% compared to the earlier parameters. Our study demonstrates that the maximum meson production efficiency per unit proton beam power occurs when the proton kinetic energy is in the range of 5-15 GeV. Finally, the dependence on energy of the number of muons at the end of the cooling channel is nearly identical to the dependence on energy of the meson production 50 m from the target. This demonstrates that the target parameters can be optimized without the additional step of running the distribution through a code such as ICOOL that simulates the bunching, phase rotation, and cooling.

Ding, X.; Kirk, H.

2010-12-01T23:59:59.000Z

313

A proposed sensor deployment to investigate biogeochemical controls on mercury cycling in Mugu Lagoon, California (CON 5)  

E-Print Network (OSTI)

biogeochemical controls on mercury cycling in Mugu Lagoon,of UCLA, is impaired for mercury, a potent neurotoxin, whichhealth and wildlife t o •Mercury methylation is the process

Sarah Rothenberg; Jenny Jay

2006-01-01T23:59:59.000Z

314

Mercury Vapor At Haleakala Volcano Area (Thomas, 1986) | Open Energy  

Open Energy Info (EERE)

Mercury Vapor At Haleakala Volcano Area (Thomas, 1986) Mercury Vapor At Haleakala Volcano Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Haleakala Volcano Area (Thomas, 1986) Exploration Activity Details Location Haleakala Volcano Area Exploration Technique Mercury Vapor Activity Date Usefulness not indicated DOE-funding Unknown Notes The field survey program on the northwest rift zone consisted of soil mercury and radon emanometry surveys, groundwater temperature and chemistry studies, Schlumberger resistivity soundings and self-potential profiles. Geophysical and geochemical surveys along this rift (southwest) were limited by difficult field conditions and access limitations. The geophysical program consisted of one Schlumberger sounding, one

315

Sorbents for the oxidation and removal of mercury  

DOE Patents (OSTI)

A promoted activated carbon sorbent is described that is highly effective for the removal of mercury from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and mercury capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and control of the active sorbent into the mercury contaminated gas stream are described.

Olson, Edwin S. (Grand Forks, ND); Holmes, Michael J. (Thompson, ND); Pavlish, John H. (East Grand Forks, MN)

2012-05-01T23:59:59.000Z

316

Sorbents for the oxidation and removal of mercury  

DOE Patents (OSTI)

A promoted activated carbon sorbent is described that is highly effective for the removal of mercury from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and mercury capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and control of the active sorbent into the mercury contaminated gas stream are described.

Olson, Edwin S. (Grand Forks, ND); Holmes, Michael J. (Thompson, ND); Pavlish, John H. (East Grand Forks, MN)

2008-10-14T23:59:59.000Z

317

NETL: IEP - Mercury Emissions Control: Emissions Characterization  

NLE Websites -- All DOE Office Websites (Extended Search)

Control Control Emissions Characterization In anticipation of the 1990 CAAAs, specifically the draft Title III regarding the characterization of potential HAPs from electric steam generating units, DOE initiated a new Air Toxics Program in 1989. The DOE Mercury Measurement and Control Program evolved as a result of the findings from the comprehensive assessment of hazardous air pollutants studies conducted by DOE from 1990 through 1997. DOE, in collaboration with EPRI, performed stack tests at a number of coal-fired power plants (identified on map below) to accurately determine the emission rates of a series of potentially toxic chemicals. These tests had not been conducted previously because of their cost, about $1 million per test, so conventional wisdom on emissions was based on emission factors derived from analyses of coal. In general, actual emissions were found to be about one-tenth previous estimates, due to a high fraction of the pollutants being captured by existing particulate control systems. These data resulted in a decision by EPA that most of these pollutants were not a threat to the environment, and needed no further regulation at power plants. This shielded the coal-fired power industry from major (tens of millions) costs that would have resulted from further controlling these emissions. However, another finding of these studies was that mercury was not effectively controlled in coal-fired utility boiler systems. Moreover, EPA concluded that a plausible link exists between these emissions and adverse health effects. Ineffective control of mercury by existing control technologies resulted from a number of factors, including variation in coal composition and variability in the form of the mercury in flue gases. The volatility of mercury was the main contributor for less removal, as compared to the less volatile trace elements/metals which were being removed at efficiencies over 99% with the fly ash. In addition, it was determined that there was no reliable mercury speciation method to accurately distinguish between the elemental and oxidized forms of mercury in the flue gas. These two forms of mercury respond differently to removal techniques in existing air pollution control devices utilized by the coal-fired utility industry.

318

Enhanced Mercury Removal by Wet FGD Systems  

Science Conference Proceedings (OSTI)

This report provides results from testing conducted in 2005 as part of three EPRI co-funded projects that are aimed at enhancing the capture of mercury in flue gas from coal-fired power boilers when scrubbed by wet flue gas desulfurization (FGD) systems. The first project is co-sponsored by the U.S. Department of Energy's National Energy Technology Laboratory (DOE-NETL) under Cooperative Agreement DE-FC26-01NT41185, "Pilot Testing of Mercury Oxidation Catalysts for Upstream of Wet FGD," as well as by two...

2006-03-07T23:59:59.000Z

319

MERCURY CONTROL WITH ADVANCED HYBRID PARTICULATE COLLECTOR  

SciTech Connect

This project was awarded under U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) Program Solicitation DE-PS26-00NT40769 and specifically addressed Technical Topical Area 4-Testing Novel and Less Mature Control Technologies on Actual Flue Gas at the Pilot Scale. The project team included the Energy & Environmental Research Center (EERC) as the main contractor; W.L. Gore & Associates, Inc., as a technical and financial partner; and the Big Stone Power Plant operated by Otter Tail Power Company, host for the field-testing portion of the research. Since 1995, DOE has supported development of a new concept in particulate control called the advanced hybrid particulate collector (AHPC). The AHPC has been licensed to W.L. Gore & Associates, Inc., and has been marketed as the Advanced Hybrid{trademark} filter by Gore. The Advanced Hybrid{trademark} filter combines the best features of electrostatic precipitators (ESPs) and baghouses in a unique configuration, providing major synergism between the two collection methods, both in the particulate collection step and in the transfer of dust to the hopper. The Advanced Hybrid{trademark} filter provides ultrahigh collection efficiency, overcoming the problem of excessive fine-particle emissions with conventional ESPs, and it solves the problem of reentrainment and re-collection of dust in conventional baghouses. The Advanced Hybrid{trademark} filter also appears to have unique advantages for mercury control over baghouses or ESPs as an excellent gas--solid contactor. The objective of the project was to demonstrate 90% total mercury control in the Advanced Hybrid{trademark} filter at a lower cost than current mercury control estimates. The approach included bench-scale batch tests, larger-scale pilot testing with real flue gas on a coal-fired combustion system, and field demonstration at the 2.5-MW (9000-acfm) scale at a utility power plant to prove scale-up and demonstrate longer-term mercury control. An additional task was included in this project to evaluate mercury oxidation upstream of a dry scrubber by using mercury oxidants. This project demonstrated at the pilot-scale level a technology that provides a cost-effective technique to control mercury and, at the same time, greatly enhances fine particulate collection efficiency. The technology can be used to retrofit systems currently employing inefficient ESP technology as well as for new construction, thereby providing a solution for improved fine particulate control combined with effective mercury control for a large segment of the U.S. utility industry as well as other industries.

Ye Zhuang; Stanley J. Miller

2005-05-01T23:59:59.000Z

320

Mercury in mussels of Bellingham Bay, Washington, (USA)  

SciTech Connect

Laboratory experiments demonstrated the existence of metallothionein-like, low molecular weight, mercury-binding proteins in the marine mussel Mytilus edulis. Relatively large quantities of mercury were associated with such proteins in gills and digestive gland, the organs of interest in the present study. /sup 14/C-incorporation indicated induction of the protein in gills, but not in digestive gland. Mercury in digestive gland may have bound to existing metal-binding proteins. Short-term incorporation of mercury occurred primarily in gills. The induction of mercury-binding proteins in gills may have facilitated detoxification of mercury at the site of uptake. Mercury in mussels of Bellingham Bay were shown to have decreased from 1970 to 1978, the collection date for the present study. Mercury levels were low but approximately three times higher than those from uncontaminated areas. Mercury associated with the mercury-binding protein of gills and digestive glands of Bellingham Bay mussels were low and reflected the concentrations measured in the whole tissues. However, the highest concentration of mercury was associated with the low molecular pool components, the identity of which is not presently known.

Roesijadi, G.; Drum, A.S.; Bridge, J.R.

1978-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

LFCM (liquid-fed ceramic melter) processing characteristics of mercury  

SciTech Connect

An experimental-scale liquid-fed ceramic melter was used in a series of tests to evaluate the processing characteristics of mercury in simulated defense waste under various melter operating conditions. This solidification technology had no detectable capacity for incorporating mercury into its borosilicate, vitreous, product, and essentially all the mercury fed to the melter was lost to the off-gas system as gaseous effluent. An ejector venturi scrubber condensed and collected 97% of the mercury evolved from the melter. Chemically the condensed mercury effluent was composed entirely of chlorides, and except in a low-temperature test, mercury chlorides (Hg{sub 2}Cl{sub 2}) was the primary chloride formed. As a result, combined mercury accounted for most of the insoluble mass collected by the process quench scrubber. Although macroscopic quantities of elemental mercury were never observed in process secondary waste streams, finely divided and dispersed mercury that blackened all condensed Hg{sub 2}Cl{sub 2} residues was capable of saturating the quenched process exhaust with mercury vapor. However, the vapor pressure of mercury in the quenched melter exhaust was easily and predictably controlled with an off-gas stream chiller. 5 refs., 4 figs., 12 tabs.

Goles, R.W.; Sevigny, G.J.; Andersen, C.M.

1990-06-01T23:59:59.000Z

322

FY09 assessment of mercury reduction at SNL/NM.  

Science Conference Proceedings (OSTI)

This assessment takes the result of the FY08 performance target baseline of mercury at Sandia National Laboratories/New Mexico, and records the steps taken in FY09 to collect additional data, encourage the voluntary reduction of mercury, and measure success. Elemental (metallic) mercury and all of its compounds are toxic, and exposure to excessive levels can permanently damage or fatally injure the brain and kidneys. Elemental mercury can also be absorbed through the skin and cause allergic reactions. Ingestion of inorganic mercury compounds can cause severe renal and gastrointestinal damage. Organic compounds of mercury such as methyl mercury, created when elemental mercury enters the environment, are considered the most toxic forms of the element. Exposures to very small amounts of these compounds can result in devastating neurological damage and death.1 SNL/NM is required to report annually on the site wide inventory of mercury for the Environmental Protection Agency's (EPA) Toxics Release Inventory (TRI) Program, as the site's inventory is excess of the ten pound reportable threshold quantity. In the fiscal year 2008 (FY08) Pollution Prevention Program Plan, Section 5.3 Reduction of Environmental Releases, a performance target stated was to establish a baseline of mercury, its principle uses, and annual quantity or inventory. This was accomplished on July 29, 2008 by recording the current status of mercury in the Chemical Information System (CIS).

McCord, Samuel Adam

2010-02-01T23:59:59.000Z

323

Pilot Testing of WRI'S Novel Mercury Control Technology by Pre-Combustion Thermal Treatment of Coal  

SciTech Connect

The challenges to the coal-fired power industry continue to focus on the emission control technologies, such as mercury, and plant efficiency improvements. An alternate approach to post-combustion control of mercury, while improving plant efficiency deals with Western Research Institute's (WRI)'s patented pre-combustion mercury removal and coal upgrading technology. WRI was awarded under the DOE's Phase III Mercury program, to evaluate the effectiveness of WRI's novel thermal pretreatment process to achieve >50% mercury removal, and at costs of <$30,000/lb of Hg removed. WRI has teamed with Etaa Energy, Energy and Environmental Research Center (EERC), Foster Wheeler North America Corp. (FWNA), and Washington Division of URS (WD-URS), and with project co-sponsors including Electric Power Research Institute (EPRI), Southern Company, Basin Electric Power Cooperative (BEPC), Montana-Dakota Utilities (MDU), North Dakota Industrial Commission (NDIC), Detroit Edison (DTE), and SaskPower to undertake this evaluation. The technical objectives of the project were structured in two phases: Phase I--coal selection and characterization, and bench-and PDU-scale WRI process testing and; and Phase II--pilot-scale pc combustion testing, design of an integrated boiler commercial configuration, its impacts on the boiler performance and the economics of the technology related to market applications. This report covers the results of the Phase I testing. The conclusion of the Phase I testing was that the WRI process is a technically viable technology for (1) removing essentially all of the moisture from low rank coals, thereby raising the heating value of the coal by about 30% for subbituminous coals and up to 40% for lignite coals, and (2) for removing volatile trace mercury species (up to 89%) from the coal prior to combustion. The results established that the process meets the goals of DOE of removing <50% of the mercury from the coals by pre-combustion methods. As such, further testing, demonstration and economic analysis as described in the Phase II effort is warranted and should be pursued.

Alan Bland; Jesse Newcomer; Kumar Sellakumar

2008-08-17T23:59:59.000Z

324

NETL: Mercury Emissions Control Technologies - Full- Scale Testing of  

NLE Websites -- All DOE Office Websites (Extended Search)

Full-Scale Testing of Enhanced Mercury Control in Wet FGD Full-Scale Testing of Enhanced Mercury Control in Wet FGD The goal of this project is to commercialize methods for the control of mercury in coal-fired electric utility systems equipped with wet flue gas desulfurization (wet FGD). The two specific objectives of this project are 1) ninety percent (90%) total mercury removal and 2) costs below 1/4 to 1/2 of today's commercially available activated carbon mercury removal technologies. Babcock and Wilcox and McDermott Technology, Inc's (B&W/MTI's) will demonstrate their wet scrubbing mercury removal technology (which uses very small amounts of a liquid reagent to achieve increased mercury removal) at two locations burning high-sulfur Ohio bituminous coal: 1) Michigan South Central Power Agency's (MSCPA) 55 MWe Endicott Station located in Litchfield, Michigan and 2) Cinergy's 1300 MWe Zimmer Station located near Cincinnati, Ohio.

325

NETL: News Release - Innovative Mercury Removal Technique Shows Early  

NLE Websites -- All DOE Office Websites (Extended Search)

August 5, 2003 August 5, 2003 Innovative Mercury Removal Technique Shows Early Promise Photochemical Process Developed in Federal Lab Removes Mercury from Flue Gas - NETL scientist Evan Granite prepares a lab test of the UV mercury removal process. - NETL scientist Evan Granite prepares for a lab test of the UV mercury removal process. MORGANTOWN, WV - A promising technology to remove mercury from coal-fired power plants -- dubbed the "GP-254 Process" -- has been developed and is currently being tested at the Department of Energy's National Energy Technology Laboratory (NETL). Newly patented, the GP-254 Process enhances mercury removal using ultraviolet light to induce various components of power plant stack gas to react with the mercury, and changes the

326

NETL: Mercury Emissions Control Technologies - Bench Scale Kinetics of  

NLE Websites -- All DOE Office Websites (Extended Search)

Bench Scale Kinetics of Mercury Reactions in FGD Liquors Bench Scale Kinetics of Mercury Reactions in FGD Liquors When research into the measurement and control of Hg emissions from coal-fired power plants began in earnest in the early 1990s, it was observed that oxidized mercury can be scrubbed at high efficiency in wet FGD systems, while elemental mercury can not. In many cases, elemental mercury concentrations were observed to increase slightly across wet FGD systems, but this was typically regarded as within the variability of the measurement methods. However, later measurements have shown substantial re-emissions from some FGD systems. The goal of this project is to develop a fundamental understanding of the aqueous chemistry of mercury (Hg) absorbed by wet flue gas desulfurization (FGD) scrubbing liquors. Specifically, the project will determine the chemical reactions that oxidized mercury undergoes once absorbed, the byproducts of those reactions, and reaction kinetics.

327

NETL: Mercury Emissions Control Technologies - Development of Comprehensive  

NLE Websites -- All DOE Office Websites (Extended Search)

Full-Scale Testing of Mercury Control Via Sorbent Injection Full-Scale Testing of Mercury Control Via Sorbent Injection DOE has identified technologies (based on past DOE and other R&D organizations' mercury measurement and control achievements) that are expected to be important in developing possible strategies on mercury control for the coal-fired electric utility industry. To address critical questions related to cost and efficiency of these mercury control technologies, DOE has funded the first of a kind large-scale initiative aimed at testing and evaluating large-scale mercury control technologies for coal-based power systems. These tests will collect cost and performance data with parametric and long term field experiments at power plants with existing air pollution control devices (APCDs) utilized to control other pollutants as well as mercury in hopes of providing the cheapest control options for the utility industry in mid-term application (5 to 10 years).

328

Mercury Handling for the Target System for a Muon Collider  

Science Conference Proceedings (OSTI)

The baseline target concept for a Muon Collider or Neutrino Factory is a free-stream mercury jet being impacted by an 8-GeV proton beam. The target is located within a 20-T magnetic field, which captures the generated pions that are conducted to a downstream decay channel. Both the mercury and the proton beam are introduced at slight downward angles to the magnetic axis. A pool of mercury serves as a receiving reservoir for the mercury and a dump for the unexpended proton beam. The impact energy of the remaining beam and jet are substantial, and it is required that splashes and waves be controlled in order to minimize the potential for interference of pion production at the target. Design issues discussed in this paper include the nozzle, splash mitigation in the mercury pool, the mercury containment vessel, and the mercury recirculation system.

Graves, Van B [ORNL; Mcdonald, K [Princeton University; Kirk, H. [Brookhaven National Laboratory (BNL); Weggel, Robert [Particle Beam Laser, Inc.; Souchlas, Nicholas [Particle Beam Laser, Inc.; Sayed, H [Brookhaven National Laboratory (BNL); Ding, X [University of California, Los Angeles

2012-01-01T23:59:59.000Z

329

INTERIM RESULTS FROM A STUDY OF THE IMPACTS OF TIN(II) BASED MERCURY TREATMENT IN A SMALL STREAM ECOSYSTEM: TIMS BRANCH, SAVANNAH RIVER SITE  

Science Conference Proceedings (OSTI)

Mercury (Hg) has been identified as a 'persistent, bioaccumulative and toxic' pollutant with widespread impacts throughout North America and the world (EPA. 1997a, 1997b, 1998a, 1998b, 2000). Although most of the mercury in the environment is inorganic Hg, a small proportion of total Hg is transformed through the actions of aquatic microbes into methylmercury (MeHg). In contrast to virtually all other metals, MeHg biomagnifies or becomes increasingly concentrated as it is transferred through aquatic food chains so that the consumption of mercury contaminated fish is the primary route of this toxin to humans. For this reason, the ambient water quality criterion (AWQC) for mercury is based on a fish tissue endpoint rather than an aqueous Hg concentration, as the tissue concentration (e.g., fish are more closely linked to aqueous MeHg than to inorganic Hg concentrations (Sveinsdottir and Mason 2005), but MeHg production is not easily predicted or controlled. At point-source contaminated sites, mercury methylation is not only affected by the absolute mercury load, but also by the form of mercury loaded. In addition, once MeHg is formed, the hydrology, trophic structure, and water chemistry of a given system affect how it is transformed and transferred through the food chain to fish. Decreasing inorganic Hg concentrations and loading may often therefore be a more achievable remediation goal, but has led to mixed results in terms of responses in fish bioaccumulation. A number of source control measures have resulted in rapid responses in lake or reservoir fisheries (Joslin 1994, Turner and Southworth 1999; Orihel et al., 2007), but examples of similar responses in Hg-contaminated stream ecosystems are less common. Recent work suggests that stream systems may actually be more susceptible to mercury bioaccumulation than lakes, highlighting the need to better understand the ecological drivers of mercury bioaccumulation in stream-dwelling fish (Chasar et al. 2009, Ward et al. 2010). In the present study we examine the response of fish to remedial actions in Tims Branch, a point-source contaminated stream on the Department of Energy's (DOE) Savannah River Site in Aiken, South Carolina. This second order stream received inorganic mercury inputs at its headwaters from the 1950s-2000s which contaminated the water, sediments, and biota downstream. In 2007, an innovative mercury removal system using tin (II) chloride (stannous chloride, SnCl{sub 2}) was implemented at a pre-existing air stripper. Tin(II) reduces dissolved Hg (II) to Hg (0), which is removed by the air stripper. During this process, tin(II) is oxidized to tin (IV) which is expected to precipitate as colloidal tin(IV) oxides and hydroxides, particulate materials with relatively low toxicity (Hallas and Cooney, 1981, EPA 2002, ATSDR, 2005). The objectives of the present research are to provide an initial assessment of the net impacts of the tin(II) based mercury treatment on key biota and to document the distribution and fate of inorganic tin in this small stream ecosystem after the first several years of operating a full scale system. To support these objectives, we collected fish, sediment, water, invertebrates, and biofilm samples from Tims Branch to quantify the general behavior and accumulation patterns for mercury and tin in the ecosystem and to determine if the treatment process has resulted in: (1) a measurable beneficial impact on (i.e., decrease of) mercury concentration in upper trophic level fish and other biota; this is a key environmental endpoint since reducing mercury concen

Looney, B.; Bryan, L.; Mathews, T.

2012-03-30T23:59:59.000Z

330

SPURIOUS SULFATE FORMATION ON COLLECTED AMBIENT AEROSOL SAMPLES  

E-Print Network (OSTI)

FORMATION ON COLLECTED AMBIENT AEROSOL SAMPLES B. W. Loo, R.FORMATION ON COLLECTED AMBIENT AEROSOL SAMPLES Billy W. Lao,ON COLLECTED AMBIENT AEROSOL SAMPLES* _B_il_l~y ___ W_. _L~o

Loo, B.W.

2011-01-01T23:59:59.000Z

331

Application of chemical kinetics to mercury cycling in the aquatic environment: Photoreduction of mercury(II) and binding of mercury(II) and methylmercury(+) to natural ligands .  

E-Print Network (OSTI)

??The thesis comprises four main chapters on chemical reactions and kinetics of some of the processes involved in the global mercury cycle. In the first… (more)

Ababneh, Fuad A

2013-01-01T23:59:59.000Z

332

NETL: IEP - Mercury Emissions Control: Regulatory Drivers  

NLE Websites -- All DOE Office Websites (Extended Search)

Regulatory Drivers Regulatory Drivers The Clean Air Act Amendments of 1990 (CAAA) brought about new awareness regarding the overall health-effects of stationary source fossil combustion emissions. Title III of the CAAA identified 189 pollutants, including mercury, as hazardous or toxic and required the Environmental Protection Agency (EPA) to evaluate their emissions by source, health effects and environmental implications, including the need to control these emissions. These pollutants are collectively referred to as air toxics or hazardous air pollutants (HAPs). The provisions in Title III specific to electric generating units (EGU) were comprehensively addressed by DOE's National Energy Technology Laboratory (NETL) and the Electric Power Research Institute (EPRI) in collaborative air toxic characterization programs conducted between 1990 and 1997. This work provided most of the data supporting the conclusions found in EPA's congressionally mandated reports regarding air toxic emissions from coal-fired utility boilers; the Mercury Study Report to Congress (1997)1 and the "Study of Hazardous Air Pollutant Emissions from Electric Utility Steam Generating Units -- Final Report to Congress" (1998).2 The first report identified coal-fired power plants as the largest source of human-generated mercury emissions in the U.S. and the second concluded that mercury from coal-fired utilities was the HAP of "greatest potential concern" to the environment and human health that merited additional research and monitoring.

333

Catalytic Reactor For Oxidizing Mercury Vapor  

DOE Patents (OSTI)

A catalytic reactor (10) for oxidizing elemental mercury contained in flue gas is provided. The catalyst reactor (10) comprises within a flue gas conduit a perforated corona discharge plate (30a, b) having a plurality of through openings (33) and a plurality of projecting corona discharge electrodes (31); a perforated electrode plate (40a, b, c) having a plurality of through openings (43) axially aligned with the through openings (33) of the perforated corona discharge plate (30a, b) displaced from and opposing the tips of the corona discharge electrodes (31); and a catalyst member (60a, b, c, d) overlaying that face of the perforated electrode plate (40a, b, c) opposing the tips of the corona discharge electrodes (31). A uniformly distributed corona discharge plasma (1000) is intermittently generated between the plurality of corona discharge electrode tips (31) and the catalyst member (60a, b, c, d) when a stream of flue gas is passed through the conduit. During those periods when corona discharge (1000) is not being generated, the catalyst molecules of the catalyst member (60a, b, c, d) adsorb mercury vapor contained in the passing flue gas. During those periods when corona discharge (1000) is being generated, ions and active radicals contained in the generated corona discharge plasma (1000) desorb the mercury from the catalyst molecules of the catalyst member (60a, b, c, d), oxidizing the mercury in virtually simultaneous manner. The desorption process regenerates and activates the catalyst member molecules.

Helfritch, Dennis J. (Baltimore, MD)

1998-07-28T23:59:59.000Z

334

Mercury and Other Trace Metals in Coal  

Science Conference Proceedings (OSTI)

This document summarizes the trace metal analyses of more than 150 as-received bituminous, sub-bituminous, and lignite coal samples from full-scale power plants. Analyses for mercury, arsenic, beryllium, cadmium, chromium, copper, nickel, and lead offer a benchmark for utilities to compare and contrast their own estimates and measurements of trace element content in coal.

1997-02-25T23:59:59.000Z

335

Coal Biomodification to Reduce Mercury Emissions  

NLE Websites -- All DOE Office Websites (Extended Search)

Road P.O. Box 880 Morgantown, WV 26507-0880 304-285-4132 heino.beckert@netl.doe.gov Coal BiomodifiCation to ReduCe meRCuRy emissions Description In partnership with a number of...

336

Evaluation of Sorbent Injection for Mercury Control  

Science Conference Proceedings (OSTI)

ADA-ES, Inc., with support from DOE/NETL, EPRI, and industry partners, studied mercury control options at six coal-fired power plants. The overall objective of the this test program was to evaluate the capabilities of activated carbon injection at six plants: Sunflower Electric's Holcomb Station Unit 1, AmerenUE's Meramec Station Unit 2, Missouri Basin Power Project's Laramie River Station Unit 3, Detroit Edison's Monroe Power Plant Unit 4, American Electric Power's Conesville Station Unit 6, and Labadie Power Plant Unit 2. These plants have configurations that together represent 78% of the existing coal-fired generation plants. The financial goals for the program established by DOE/NETL were to reduce the uncontrolled mercury emissions by 50 to 70% at a cost 25 to 50% lower than the target established by DOE of $60,000 per pound of mercury removed. Results from testing at Holcomb, Laramie, Meramec, Labadie, and Monroe indicate the DOE goal was successfully achieved. However, further improvements for plants with conditions similar to Conesville are recommended that would improve both mercury removal performance and economics.

Sharon Sjostrom

2008-06-30T23:59:59.000Z

337

Impacts of NOx Controls on Mercury Controllability  

Science Conference Proceedings (OSTI)

Past tests have led researchers and air pollution regulators to hypothesize that nitrogen oxides (NOx) controls can enhance mercury capture by particulate collection devices and sulfur dioxide (SO2) scrubbers. This technology review presents results obtained to date from a comprehensive program designed to confirm, qualify, and quantify these hypotheses.

2002-03-13T23:59:59.000Z

338

Evaluation of Sorbent Injection for Mercury Control  

SciTech Connect

The power industry in the U.S. is faced with meeting new regulations to reduce the emissions of mercury compounds from coal-fired plants. These regulations are directed at the existing fleet of nearly 1,100 boilers. These plants are relatively old with an average age of over 40 years. Although most of these units are capable of operating for many additional years, there is a desire to minimize large capital expenditures because of the reduced (and unknown) remaining life of the plant to amortize the project. Injecting a sorbent such as powdered activated carbon into the flue gas represents one of the simplest and most mature approaches to controlling mercury emissions from coal-fired boilers. This is the final site report for tests conducted at DTE Energy's Monroe Power Plant, one of five sites evaluated in this DOE/NETL program. The overall objective of the test program was to evaluate the capabilities of activated carbon injection at five plants: Sunflower Electric's Holcomb Station Unit 1, AmerenUE's Meramec Station Unit 2, Missouri Basin Power Project's Laramie River Station Unit 3, Detroit Edison's Monroe Power Plant Unit 4, and AEP's Conesville Station Unit 6. These plants have configurations that together represent 78% of the existing coal-fired generation plants. The goals for the program established by DOE/NETL were to reduce the uncontrolled mercury emissions by 50 to 70% at a cost 25 to 50% lower than the target established by DOE of $60,000/lb mercury removed. The results from Monroe indicate that using DARCO{reg_sign} Hg would result in higher mercury removal (80%) at a sorbent cost of $18,000/lb mercury, or 70% lower than the benchmark. These results demonstrate that the goals established by DOE/NETL were exceeded during this test program. The increase in mercury removal over baseline conditions is defined for this program as a comparison in the outlet emissions measured using the Ontario Hydro method during the baseline and long-term test periods. The change in outlet emissions from baseline to long-term testing was 81%.

Sharon Sjostrom

2006-04-30T23:59:59.000Z

339

Depth profiling ambient noise in the deep ocean  

E-Print Network (OSTI)

Acoustic Ambient Noise in the Ocean: Spectra and Sources,"and Osterhus, S. (1999). "Ocean Ambient Sound Instrumenta Subsurface Package," J. Atmos. Ocean. Tech. 16, 1118-1126.

Barclay, David Readshaw

2011-01-01T23:59:59.000Z

340

Vermont Air Pollution Control Regulations, Ambient Air Quality...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Ambient Air Quality Standards (Vermont) Vermont Air Pollution Control Regulations, Ambient Air Quality Standards (Vermont) Eligibility Utility Agricultural Investor-Owned Utility...

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Mercury Control with Calcium-Based Sorbents and Oxidizing Agents  

SciTech Connect

This Final Report contains the test descriptions, results, analysis, correlations, theoretical descriptions, and model derivations produced from many different investigations performed on a project funded by the U.S. Department of Energy, to investigate calcium-based sorbents and injection of oxidizing agents for the removal of mercury. Among the technologies were (a) calcium-based sorbents in general, (b) oxidant-additive sorbents developed originally at the EPA, and (c) optimized calcium/carbon synergism for mercury-removal enhancement. In addition, (d) sodium-tetrasulfide injection was found to effectively capture both forms of mercury across baghouses and ESPs, and has since been demonstrated at a slipstream treating PRB coal. It has been shown that sodium-tetrasulfide had little impact on the foam index of PRB flyash, which may indicate that sodium-tetrasulfide injection could be used at power plants without affecting flyash sales. Another technology, (e) coal blending, was shown to be an effective means of increasing mercury removal, by optimizing the concentration of calcium and carbon in the flyash. In addition to the investigation and validation of multiple mercury-control technologies (a through e above), important fundamental mechanism governing mercury kinetics in flue gas were elucidated. For example, it was shown, for the range of chlorine and unburned-carbon (UBC) concentrations in coal-fired utilities, that chlorine has much less effect on mercury oxidation and removal than UBC in the flyash. Unburned carbon enhances mercury oxidation in the flue gas by reacting with HCl to form chlorinated-carbon sites, which then react with elemental mercury to form mercuric chloride, which subsequently desorbs back into the flue gas. Calcium was found to enhance mercury removal by stabilizing the oxidized mercury formed on carbon surfaces. Finally, a model was developed to describe these mercury adsorption, desorption, oxidation, and removal mechanisms, including the synergistic enhancement of mercury removal by calcium.

Thomas K. Gale

2005-07-01T23:59:59.000Z

342

The Effect of Wildfire on Soil Mercury Concentrations in Southern California Watersheds  

E-Print Network (OSTI)

G. J. (2007). Release of mercury from Rocky Mountain forestSlemr, F. (2001). Gaseous mercury emissions from a fire inMontesdeoca, M. R. (2008). Mercury transport in response to

2010-01-01T23:59:59.000Z

343

Contribution of Iron-Reducing Bacteria to Mercury Methylation in Marine Sediments  

E-Print Network (OSTI)

AND R. P. MASON. 2006. Mercury methylation by dissimilatoryPRUCHA, AND G. MIERLE. 1991. Mercury methylation by sulfate-AND J. M. SIEBURTH. 1993. Mercury biogeochemical cycling in

Fleming, Emily J.; Nelson, D C

2006-01-01T23:59:59.000Z

344

ROTATION OF MERCURY: THEORETICAL ANALYSIS OF THE DYNAMICS OF A RIGID ELLIPSOIDAL PLANET  

E-Print Network (OSTI)

Laboratory ROTATION OF MERCURY: THEDRETICAL ANALYSIS OF THEW -7405-eng-48 ROTATION OF MERCURY: THEORETICAL ANALYSIS OFfor the rotation of Mercury is sho'ln to imply locked-in

Laslett, L. Jackson

2008-01-01T23:59:59.000Z

345

USE OF ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY FOR THE MEASUREMENT OF MERCURY IN OIL SHALE GASES  

E-Print Network (OSTI)

and R. E. Poulson. Mercury Emissions From A Simulated In-for the Measurement of Mercury in Oil Shale Gases D. GirvinJFOR THE MEASUREMENT OF MERCURY IN OIL SHALE GASES D. C.

Girvin, D.G.

2011-01-01T23:59:59.000Z

346

A Solid-State 199Hg NMR Study of Mercury Halides  

E-Print Network (OSTI)

red polymorph) suggest that the mercury is in sites of cubicTable III. NMR Properties of Mercury Halide Nuclei a IsotopeState 199 Hg NMR Study of Mercury Halides R. E. Taylor 1 *,

Taylor, Robert E; Bai, Shi; Dybowski, Cecil

2011-01-01T23:59:59.000Z

347

Enhanced Elemental Mercury Removal from Coal-fired Flue Gas by Sulfur-chlorine Compounds  

E-Print Network (OSTI)

Shi, J.B. ; Feng, X.B. Mercury Pollution in China. Environ.J T. DOE/NETL’s Phase II Mercury Control Technology Fieldoxidants for the oxidation of mercury gas. Ind. vEng. Chem.

Miller, Nai-Qiang Yan-Zan Qu Yao Chi Shao-Hua Qiao Ray Dod Shih-Ger Chang Charles

2008-01-01T23:59:59.000Z

348

Oxidation of elemental mercury by chlorine: Gas phase, Surface, and Photo-induced reaction pathways  

E-Print Network (OSTI)

of Air Quality III: Mercury, Trace Elements, and Particulate34, 2711. 7. Sloss, L.L. Mercury – Emissions and Control.1996 , Jan. , 60 pp. 2. Mercury Study Report to Congress;

Yan, Nai-Qiang; Liu, Shou-Heng; Chang, Shih-Ger

2004-01-01T23:59:59.000Z

349

Mercury, Cadmium and Lead Biogeochemistry in the Soil–Plant–Insect System in Huludao City  

E-Print Network (OSTI)

YE, Ketris MP (2005a) Mercury in coal: a review part 1of total and methyl mercury by arthropods. Bull Environ259 DOI 10.1007/s00128-009-9688-6 Mercury, Cadmium and Lead

Zhang, Zhong-Sheng; Lu, Xian-Guo; Wang, Qi-Chao; Zheng, Dong-Mei

2009-01-01T23:59:59.000Z

350

Mercury and Methylmercury in the San Francisco Bay area: land-use impact and indicators  

E-Print Network (OSTI)

R.P. , and Flegal A. R. 2003, Mercury speciation in the SanAbdrashitova S. A. , 2001, Mercury in Aquatic Environment: A222 Hydrology for Planner Mercury and Methylmercury in the

Kim, Hyojin

2008-01-01T23:59:59.000Z

351

Evaluation of MerCAP^TM for Power Plant Mercury Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluation of MErCaP(tm) for PowEr Plant MErCury Control Background Several technologies are under development for removing mercury from power plant flue gas streams. The mercury...

352

Information on the Fate of Mercury From Fluorescent Lamps Disposed in Landfills  

Science Conference Proceedings (OSTI)

Mercury is contained in energy-efficient fluorescent, mercury-vapor, metal halide, and high-pressure sodium lamps. This report presents information on the potential for air and groundwater contamination when mercury lamps are disposed in municipal landfills.

1995-04-19T23:59:59.000Z

353

NETL: Ambient Monitoring - Steubenville Comprehensive Air Monitoring  

NLE Websites -- All DOE Office Websites (Extended Search)

Steubenville Comprehensive Air Monitoring Project (SCAMP) Steubenville Comprehensive Air Monitoring Project (SCAMP) The National Ambient Air Quality Standards for airborne fine particles (PM2.5) are based on the mass of PM2.5 measured at outdoor monitoring stations; however, most people spend the majority of their time indoors. In order to fully understand the relationship between ambient PM2.5 and human health effects, it is important to define how ambient PM2.5 concentrations and compositions compare to those actually breathed by humans during normal daily activities. The objective of SCAMP is to measure the concentrations of PM2.5 and other potential air pollutants at ambient monitoring stations in and around Steubenville, OH, and relate them to the pollutant concentrations in air that is actually breathed by people living in the area. Steubenville was chosen by DOE for this study because of the ability to integrate its results with those of the UORVP, and also because Steubenville was one of the six cities where correlations between ambient PM2.5 mass and adverse health effects had been noted. These correlations had been cited by EPA as one of the primary justifications for its 1997 ambient PM2.5 standards. Complete characterization of the relationships between ambient PM2.5 and human exposure, including the chemical components of PM2.5 at various locations, will provide a comprehensive database for use in subsequent epidemiological studies, long-range transport studies, and State Implementation Program development. CONSOL Energy is the primary performer of SCAMP, and will provide the necessary coordination and data integration between the various components of the study.

354

Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques |  

Open Energy Info (EERE)

Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Evaluation of the Mercury Soil Mapping Geothermal Exploration Techniques Abstract In order to evaluate the suitability of the soil mercury geochemical survey as a geothermal exploration technique, soil concentrates of mercy are compared to the distribution of measured geothermal gradients at Dixie Valley, Nevada; Roosevelt Hot Springs, Utah; and Nova, Japan. Zones containing high mercury values are found to closely correspond to high geothermal gradient zones in all three areas. Moreover, the highest mercury values within the anomalies are found near the wells with the highest geothermal gradient. Such close correspondence between soil concentrations

355

Geological and Anthropogenic Factors Influencing Mercury Speciation in Mine  

NLE Websites -- All DOE Office Websites (Extended Search)

Geological and Anthropogenic Factors Influencing Mercury Speciation Geological and Anthropogenic Factors Influencing Mercury Speciation in Mine Wastes Christopher S. Kim,1 James J. Rytuba,2 Gordon E. Brown, Jr.3 1Department of Physical Sciences, Chapman University, Orange, CA 92866 2U.S. Geological Survey, Menlo Park, CA 94025 3Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305 Introduction Figure 1. Dr. Christopher Kim collects a mine waste sample from the Oat Hill mercury mine in Northern California. The majority of mercury mine wastes at these sites are present as loose, unconsolidated piles, facilitating the transport of mercury-bearing material downstream into local watersheds. Mercury (Hg) is a naturally occurring element that poses considerable health risks to humans, primarily through the consumption of fish which

356

Thief Process Removal of Mercury from Flue Gas  

NLE Websites -- All DOE Office Websites (Extended Search)

Process for the Removal of Mercury from Flue Gas Process for the Removal of Mercury from Flue Gas Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) is seeking licensing partners interested in implementing United States Patent Number 6,521,021 entitled "Thief Process for the Removal of Mercury from Flue Gas." Disclosed in this patent is a novel process in which partially combusted coal is removed from the combustion chamber of a power plant using a lance (called a "thief"). This partially combusted coal acts as a thermally activated adsorbent for mercury. When it is in- jected into the duct work of the power plant downstream from the exit port of the combustion chamber, mercury within the flue gas contacts and adsorbs onto the thermally activated sorbent. The sorbent-mercury

357

Oxidation of Mercury in Products of Coal Combustion  

NLE Websites -- All DOE Office Websites (Extended Search)

Heng Ban Heng Ban Principal Investigator University of Alabama at Birmingham 1150 10th Avenue South Birmingham, AL 35294-4461 205-934-0011 hban@uab.edu Environmental and Water Resources OxidatiOn Of Mercury in PrOducts Of cOal cOMbustiOn Background The 2005 Clean Air Mercury Rule will require significant reductions in mercury emissions from coal-fired power plants. A variety of mercury reduction technologies are under commercial development, but an improved understanding of the fundamental chemical mechanisms that control the transformations and capture of mercury in boilers and pollution control devices is required to achieve necessary performance and cost reduction levels. Oxidized mercury is more easily captured by pollution control devices, such as Selective

358

Mercury Control Technologies for Electric Utilities Burning Lignite Coal  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury control technologies for Mercury control technologies for electric utilities Burning lignite coal Background In partnership with a number of key stakeholders, the U.S. Department of Energy's Office of Fossil Energy (DOE/FE), through its National Energy Technology Laboratory (NETL), has been carrying out a comprehensive research program since the mid-1990s focused on the development of advanced, cost-effective mercury (Hg) control technologies for coal-fired power plants. Mercury is a poisonous metal found in coal, which can be harmful and even toxic when absorbed from the environment and concentrated in animal tissues. Mercury is present as an unwanted by-product of combustion in power plant flue gases, and is found in varying percentages in three basic chemical forms(known as speciation): particulate-bound mercury, oxidized

359

Mercury Energy formerly Aquus Energy | Open Energy Information  

Open Energy Info (EERE)

Energy formerly Aquus Energy Energy formerly Aquus Energy Jump to: navigation, search Name Mercury Energy (formerly Aquus Energy) Place New Rochelle, New York Zip 10801 Sector Solar Product Integrator of solar energy systems for commercial and residential clients located in the mid-Atlantic and Northeast regions of the US through its wholly-owned subsidary Mercury Solar Energy. References Mercury Energy (formerly Aquus Energy)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Mercury Energy (formerly Aquus Energy) is a company located in New Rochelle, New York . References ↑ "Mercury Energy (formerly Aquus Energy)" Retrieved from "http://en.openei.org/w/index.php?title=Mercury_Energy_formerly_Aquus_Energy&oldid=348731

360

Evaluation of the mercury soil mapping geothermal exploration techniques  

Science Conference Proceedings (OSTI)

In order to evaluate the suitability of the soil mercury geochemical survey as a geothermal exploration technique, soil concentrations of mercury are compared to the distribution of measured geothermal gradients at Dixie Valley, Nevada; Roosevelt Hot Springs, Utah; and Noya, Japan. Zones containing high-mercury values are found to closely correspond to high geothermal gradient zones in all three areas. Moreover, the highest mercury values within the anomalies are found near the wells with the highest geothermal gradient. Such close correspondence between soil concentrations of mercury and high-measured geothermal gradients strongly suggests that relatively low-cost soil mercury geochemical sampling can be effective in identifying drilling targets within high-temperature areas.

Matlick, J.S.; Shiraki, M.

1981-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Oxidation of Mercury in Products of Coal Combustion  

SciTech Connect

Laboratory measurements of mercury oxidation during selective catalytic reduction (SCR) of nitric oxide, simulation of pilot-scale measurements of mercury oxidation and adsorption by unburned carbon and fly ash, and synthesis of new materials for simultaneous oxidation and adsorption of mercury, were performed in support of the development of technology for control of mercury emissions from coal-fired boilers and furnaces. Conversion of gas-phase mercury from the elemental state to water-soluble oxidized form (HgCl{sub 2}) enables removal of mercury during wet flue gas desulfurization. The increase in mercury oxidation in a monolithic V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} SCR catalyst with increasing HCl at low levels of HCl (< 10 ppmv) and decrease in mercury oxidation with increasing NH{sub 3}/NO ratio during SCR were consistent with results of previous work by others. The most significant finding of the present work was the inhibition of mercury oxidation in the presence of CO during SCR of NO at low levels of HCl. In the presence of 2 ppmv HCl, expected in combustion products from some Powder River Basin coals, an increase in CO from 0 to 50 ppmv reduced the extent of mercury oxidation from 24 {+-} 3 to 1 {+-} 4%. Further increase in CO to 100 ppmv completely suppressed mercury oxidation. In the presence of 11-12 ppmv HCl, increasing CO from 0 to {approx}120 ppmv reduced mercury oxidation from {approx}70% to 50%. Conversion of SO{sub 2} to sulfate also decreased with increasing NH{sub 3}/NO ratio, but the effects of HCl and CO in flue gas on SO{sub 2} oxidation were unclear. Oxidation and adsorption of mercury by unburned carbon and fly ash enables mercury removal in a particulate control device. A chemical kinetic mechanism consisting of nine homogeneous and heterogeneous reactions for mercury oxidation and removal was developed to interpret pilot-scale measurements of mercury oxidation and adsorption by unburned carbon and fly ash in experiments at pilot scale, burning bituminous coals (Gale, 2006) and blends of bituminous coals with Powder River Basin coal (Gale, 2005). The removal of mercury by fly ash and unburned carbon in the flue gas from combustion of the bituminous coals and blends was reproduced with satisfactory accuracy by the model. The enhancement of mercury capture in the presence of calcium (Gale, 2005) explained a synergistic effect of blending on mercury removal across the baghouse. The extent of mercury oxidation, on the other hand, was not so well described by the simulation, because of oversensitivity of the oxidation process in the model to the concentration of unburned carbon. Combined catalysts and sorbents for oxidation and removal of mercury from flue gas at low temperature were based on surfactant-templated silicas containing a transition metal and an organic functional group. The presence of both metal ions and organic groups within the pore structure of the materials is expected to impart to them the ability to simultaneously oxidize elemental mercury and adsorb the resulting oxidized mercury. Twelve mesoporous organosilicate catalysts/sorbents were synthesized, with and without metals (manganese, titanium, vanadium) and organic functional groups (aminopropyl, chloropropyl, mercaptopropyl). Measurement of mercury oxidation and adsorption by the candidate materials remains for future work.

Peter Walsh; Giang Tong; Neeles Bhopatkar; Thomas Gale; George Blankenship; Conrad Ingram; Selasi Blavo Tesfamariam Mehreteab; Victor Banjoko; Yohannes Ghirmazion; Heng Ban; April Sibley

2009-09-14T23:59:59.000Z

362

Mercury Vapor At Lualualei Valley Area (Thomas, 1986) | Open Energy  

Open Energy Info (EERE)

Mercury Vapor At Lualualei Valley Area (Thomas, 1986) Mercury Vapor At Lualualei Valley Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Lualualei Valley Area (Thomas, 1986) Exploration Activity Details Location Lualualei Valley Area Exploration Technique Mercury Vapor Activity Date Usefulness useful DOE-funding Unknown Notes Soil mercury and radon emanation surveys were performed over much of the accessible surface of Lualualei Valley (Cox and Thomas, 1979). The results of these surveys (Figs 7 and 8) delineated several areas in which soil mercury concentrations or radon emanation rates were substantially above normal background values. Some of these areas were apparently coincident with the mapped fracture systems associated with the caldera boundaries.

363

NETL: Emissions Characterization - Direct Measurement of Mercury Reactions  

NLE Websites -- All DOE Office Websites (Extended Search)

Direct Measurement of Mercury Reactions in Coal Power Plant Plumes: Pleasant Prairie Plant Direct Measurement of Mercury Reactions in Coal Power Plant Plumes: Pleasant Prairie Plant Under DOE-NETL Cooperative Agreement DE-FC26-03NT41724, EPRI, in collaboration with Frontier Geosciences and the University of North Dakota Energy and Environmental Research Center (EERC), will perform precise in-stack and in-plume sampling of mercury emitted from the stack of WE Energies' Pleasant Prairie coal-fired power plant near Kenosha, Wisconsin. The overall objective of the project is to clarify the role, rates and end result of chemical transformations that may occur to mercury that has been emitted from elevated stacks of coal-fired electric power plants. This information is critical in determining the role of coal-fired plants in mercury deposition and in developing cost-effective, environmentally sound policies and strategies for reducing the adverse environmental effects of mercury.

364

Significance of Pre-Industrial and Older Anthropogenic Sources of Mercury in Ichawaynochaway Creek Watershed, Georgia  

Science Conference Proceedings (OSTI)

In response to concerns about elevated levels of mercury in fish tissue, the U.S. Environmental Protection Agency (EPA) has developed mercury Total Maximum Daily Loads (TMDL), which is a calculation of the maximum amount of mercury a waterbody can assimilate without exceeding the applicable water quality standard. These calculations assume that >99% of mercury load to the aquatic systems is derived from recent atmospheric deposition and that older anthropogenic mercury or mercury from terrestrial sources...

2004-06-16T23:59:59.000Z

365

Development and Evaluation of Low Cost Mercury Sorbents  

Science Conference Proceedings (OSTI)

EPRI is conducting research to investigate sorbent injection for mercury removal in utility flue gas. This report describes laboratory work conducted from mid-1999 through mid-2000 to investigate the ability of low-cost sorbents to remove mercury from simulated and actual flue gas. The goal of this program is the development of effective mercury sorbents that can be produced at lower costs than existing commercial activated carbons. In this work, low-cost sorbents were prepared and then evaluated in labo...

2000-11-27T23:59:59.000Z

366

Thief Carbon Catalyst for Oxidation of Mercury in Effluent Stream  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Catalyst for Oxidation of Mercury in Effluent Carbon Catalyst for Oxidation of Mercury in Effluent Stream Contact NETL Technology Transfer Group techtransfer@netl.doe.gov January 2012 Significance * Oxidizes heavy metal contaminants, especially mercury, in gas streams * Uses partially combusted coal ("Thief" carbon) * Yields an inexpensive catalyst * Cheap enough to be a disposable catalyst * Cuts long-term costs * Simultaneously addresses oxidation and adsorption issues Applications * Any process requiring removal of heavy

367

Controlling mercury spills in laboratories with a thermometer exchange program  

SciTech Connect

This paper presents a case for replacing mercury thermometers with their organic-liquid-filled counterparts. A review of liquid-in glass-thermometers is given. In addition, a brief summary of mercury's health effects and exposure limits is presented. Spill cleanup methods and some lessons learned from our experience are offered as well. Finally, an overview of the mercury thermometer exchange program developed at Lawrence Berkeley National Laboratory is presented.

McLouth, Lawrence D.

2002-03-25T23:59:59.000Z

368

The Effect of Ammonia on Mercury Partitioning in Fly Ash  

Science Conference Proceedings (OSTI)

Management options and environmental assessments for fly ash are driven primarily by their physical and chemical characteristics. This report describes the results of a laboratory study on the leaching of mercury from several paired fly ash samples from facilities employing powdered activated carbon (PAC) injection for mercury control. While previous EPRI research has shown that mercury leaching from ash with PAC is negligible, it has also been found that ammonia complexes can increase the mobility of so...

2008-03-25T23:59:59.000Z

369

State of Knowledge on Mercury Chemistry in Power Plant Plumes  

Science Conference Proceedings (OSTI)

Chemical transformations may occur in the flue gas plume of coal-fired power plants (CFPP) that convert reactive gaseous mercury (RGM) into gaseous elemental mercury (GEM). Since the chemical form of inorganic Hg determines its solubility in water and therefore its deposition rate, understanding this chemistry has important implications for emission control. This fact sheet summarizes the state-of-knowledge of mercury chemistry, kinetics, and thermodynamics in CFPP plumes.

2008-12-23T23:59:59.000Z

370

Development and Demonstration of Mercury Control by Dry Technologies  

Science Conference Proceedings (OSTI)

The Environmental Protection Agency (EPA) will regulate mercury emissions from coal-fired boilers under Title III of the Clean Air Act Amendments of 1990, with compliance slated for December 2007. It is thus very important for power producers to determine the amount of mercury emissions from their power plants, options for reducing mercury emissions, the cost-effectiveness of various removal technologies, and the potential impact on power plant operation and other air pollutant emissions.

2003-02-17T23:59:59.000Z

371

Thief carbon catalyst for oxidation of mercury in effluent stream  

DOE Patents (OSTI)

A catalyst for the oxidation of heavy metal contaminants, especially mercury (Hg), in an effluent stream is presented. The catalyst facilitates removal of mercury through the oxidation of elemental Hg into mercury (II) moieties. The active component of the catalyst is partially combusted coal, or "Thief" carbon, which can be pre-treated with a halogen. An untreated Thief carbon catalyst can be self-promoting in the presence of an effluent gas streams entrained with a halogen.

Granite, Evan J. (Wexford, PA); Pennline, Henry W. (Bethel Park, PA)

2011-12-06T23:59:59.000Z

372

Winterscape and ambient video: an intermedia border zone  

Science Conference Proceedings (OSTI)

"Ambient Video" is an emergent media form that operates in an intermedia border zone, sharing the aesthetics of cinema, video, painting, and fine art photography. Winterscape is an ambient video work that incorporates these directions. Like any ambient ... Keywords: ambient video, cinema, experimental film, moving image, poetics, post-production, video, video art, visual effects

Jim Bizzocchi

2008-10-01T23:59:59.000Z

373

Mercury Vapor At Silver Peak Area (Henkle, Et Al., 2005) | Open...  

Open Energy Info (EERE)

Mercury Vapor At Silver Peak Area (Henkle, Et Al., 2005) Exploration Activity Details Location Silver Peak Area Exploration Technique Mercury Vapor Activity Date Usefulness useful...

374

Oxidation of elemental mercury by chlorine: Gas phase, Surface, and Photo-induced reaction pathways  

E-Print Network (OSTI)

of Elemental Mercury by Chlorine: Gas Phase, Surface, andthe oxidation of mercury by chlorine gas. The kinetics wasoxidation of Hg 0 by chlorine (Cl 2 ). The three concurrent

Yan, Nai-Qiang; Liu, Shou-Heng; Chang, Shih-Ger

2004-01-01T23:59:59.000Z

375

Mercury levels in albacore tuna (Thunnus alalunga) and the effects of canning.  

E-Print Network (OSTI)

??Mercury is a toxic heavy metal released into the environment from both natural and anthropogenic sources. The organic form of mercury is a potent neurotoxin… (more)

Rasmussen, Rosalee S.

2006-01-01T23:59:59.000Z

376

Gaseous dry deposition of atmospheric mercury: A comparison of two surface resistance models for deposition to semiarid vegetation  

Science Conference Proceedings (OSTI)

In the United States, atmospheric mercury (Hg) deposition, from regional and international sources, is the largest contributor to increased Hg concentrations in bodies of water leading to bioaccumulation of methyl mercury in fish. In this work, modeled dry deposition velocities (vd) for gaseous Hg are calculated using two surface resistance parameterizations found in the literature. The flux is then estimated as the product of the species concentration and modeled vd. The calculations utilize speciated atmospheric mercury concentrations measured during an annual monitoring campaign in southern Idaho. Gaseous elemental mercury (GEM) and reactive gaseous mercury (RGM) were monitored with Tekran models 2537A and 1130, respectively. Two anemometers collected meteorological data, including one fast-response three-dimensional sonic anemometer to measure turbulence parameters. For the flux calculation, three resistances are required to model the mechanisms that transport gaseous Hg from the atmosphere to the surface, with the surface resistance being the largest source of error. Results from two surface resistance models are presented. In particular, the downward flux is sensitive to the choice of model and input parameters such as seasonal category and mesophyll resistance. A comparison of annual GEM and RGM fluxes calculated using the two models shows good agreement for RGM (3.2% difference for annual deposition); however, for the low-solubility species of GEM, the models show a 64% difference in annual fluxes, with a range of 32% to 200% in seasonal fluxes. Results indicate the importance of understanding the diurnal variation of the physical processes modeled in the surface resistance parameterization for vd.

Heather A. Holmes; Eric R. Pardyjak; Kevin D. Perry; Michael L. Abbott

2011-07-01T23:59:59.000Z

377

The mission of the Remediation of Mercury and Industrial  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Remediation of Mercury and Industrial Contaminants Applied Field Research Initiative is to control the flux of contaminants in soil and water environments for the purpose of...

378

Mercury Vapor At Lassen Volcanic National Park Area (Varekamp...  

Open Energy Info (EERE)

Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Mercury Vapor At Lassen Volcanic National Park Area (Varekamp & Buseck, 1983) Jump to:...

379

Mercury Vapor At Mickey Hot Springs Area (Varekamp & Buseck,...  

Open Energy Info (EERE)

Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Mercury Vapor At Mickey Hot Springs Area (Varekamp & Buseck, 1983) Jump to: navigation,...

380

Mercury Vapor At Breitenbush Hot Springs Area (Varekamp & Buseck...  

Open Energy Info (EERE)

Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Breitenbush Hot Springs Area (Varekamp & Buseck, 1983) Exploration Activity...

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

NETL: Mercury Emissions Control Technologies - Long-Term Demonstration...  

NLE Websites -- All DOE Office Websites (Extended Search)

Long-Term Demonstration of Sorbent Enhancement Additive Technology for Mercury Control In this project, The University of North Dakota Energy & Environmental Research Center...

382

Mercury Vapor At Vale Hot Springs Area (Varekamp & Buseck, 1983...  

Open Energy Info (EERE)

Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon Mercury Vapor At Vale Hot Springs Area (Varekamp & Buseck, 1983) Jump to: navigation, search...

383

NIST: X-Ray Mass Attenuation Coefficients - Mercury  

Science Conference Proceedings (OSTI)

Table of Contents Back to table 3 Mercury Z = 80 HTML table format. Energy, ?/?, ? en /?. (MeV), (cm 2 /g), (cm 2 /g). 1.00000 ...

384

ORNL DAAC, Land Validation Data in Mercury, June 4, 2002  

NLE Websites -- All DOE Office Websites (Extended Search)

collected at field sites for comparison with satellite-derived products. A total of 51 land validation data sets are currently registered in Mercury. The data include land...

385

BSA 99-09: Improved Ex-Situ Mercury Remediation  

The present invention provides a process for the treatment of mercury containing waste in a single reaction vessel. ... i.e. mixed wastes. ...

386

Mercury Control Demonstration Projects Cover Photos: * Top: Limestone Power Plant  

NLE Websites -- All DOE Office Websites (Extended Search)

6 FEBRUARY 2008 6 FEBRUARY 2008 Mercury Control Demonstration Projects Cover Photos: * Top: Limestone Power Plant * Bottom left: AES Greenidge Power Plant * Bottom right: Presque Isle Power Plant A report on three projects conducted under separate cooperative agreements between the U.S. Department of Energy and: * Consol Energy * Pegasus Technologies * We Energies  Mercury Control Demonstration Projects Executive Summary ............................................................................ 4 Background ......................................................................................... 5 Mercury Removal Projects ................................................................ 7 TOXECON(tm) Retrofit For Mercury and Multi-Pollutant Control on Three 90-MW Coal-Fired Boilers ........................................7

387

Catalysts for Oxidation of Mercury in Flue Gas  

Disclosed in this patent are catalysts for the oxidation of elemental mercury in flue gas. These novel catalysts include iridium (Ir), ...

388

AWMA 97th Annual Conference & Exhibition Mercury and Power Generation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Program for Coal-Fired Power Plants AWMA 97 th Annual Conference & Exhibition Mercury and Power Generation Panel June 23, 2003 Indianapolis, IN Thomas J. Feeley, III...

389

DOE-NETLs Mercury R&D Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Initiative February 14, 2002 ACS Monthly Meeting November 4, 2004 History of Mercury R&D 1990 1995 2000 2005 2010 * Field testing * Plume chemistry Final Hg Regulations *...

390

Mercury Oxidation and Capture over SCR Catalysts in Simulated ...  

Science Conference Proceedings (OSTI)

The SCR catalysts were tested for oxidation and capture of elemental mercury ... EBSD Analysis of Complex Microstructures of CSP? Processed Low Carbon ...

391

Critical National Need Idea Title: Effective Mercury Removal ...  

Science Conference Proceedings (OSTI)

... a report to the White House, "Methylmercury in the GulfOfMexico: State of Knowledge and Research Needs", detailed the harm of mercury from coal- ...

2011-08-02T23:59:59.000Z

392

NETL: Advanced NOx Emissions Control: Control Technology - Mercury...  

NLE Websites -- All DOE Office Websites (Extended Search)

Mercury Speciation from NOx Control University of North Dakota Energy and Environmental Research Center (UNDEERC) is addressing the impact that selective catalytic reduction (SCR),...

393

Large-Scale Testing of Enhanced Mercury Removal for Subbituminous...  

NLE Websites -- All DOE Office Websites (Extended Search)

the mid-1990s to develop advanced, cost-effective mercury (Hg) control technologies for coal-fired power plants. Anticipating new Federal rules and possible state legislation,...

394

ORNL research reveals new challenges for mercury cleanup | ornl...  

NLE Websites -- All DOE Office Websites (Extended Search)

Jennifer Brouner Communications 865.241.0709 ORNL research reveals new challenges for mercury cleanup ORNL researchers are learning more about the microbial processes that convert...

395

SNAP I MERCURY BOILER DEVELOPMENT, JANUARY 1957 TO JUNE 1959  

SciTech Connect

The mercury-boiler development program was undertaken to develop a system that would utilize the heat of radioisotope decay to boil and superheat mercury vapor for use with a small turbine-generator package. Through the use of a Rankine cycle, the mercury vapor can be provided continuously to power a turbine-driven alternator and produce electricity for extended periods of time. This mercury boiler and the related power-conversion system was planned for a satellite that would orbit the earth. This system design and development program was designated as SNAP-I. Development of the mercury boiler is described and a chronological description of the various mercury-boiler concepts is presented. The applicable results of an extensive literature survey of mercury are included. The mercury-boiler experimental-test-program description provides complete coverage of each experimental boiler and its relation to the system design of that period. A summary of all mercury boilers and their final disposition is also given. (auth)

Jicha, J.; Keenan, J.J.

1960-06-01T23:59:59.000Z

396

Method for Removal of Mercury from Various Gas Streams  

NLE Websites -- All DOE Office Websites (Extended Search)

(NETL) is seeking licensing partners interested in implementing United States Patent Number 6,576,092 entitled "Method for Removal of Mercury from Various Gas Streams."...

397

NETL: News Release - DOE Licenses Mercury Control Patent to Help...  

NLE Websites -- All DOE Office Websites (Extended Search)

4, 2007 DOE Licenses Mercury Control Patent to Help Meet Clean Air Regulations Research Aims at Trace Element Reduction from Power Generation Facilities by 2010 Washington, DC - A...

398

NETL: CCPI - TOXECON Retrofit for Mercury and Multi-Pollutant...  

NLE Websites -- All DOE Office Websites (Extended Search)

2004) Environmental Reports TOXECON Retrofit for Mercury and Multi-Pollutant Control, Environmental Assessment PDF-847KB (Sept 2003) PAPERS AND PRESENTATIONS Concrete...

399

NETL: Mercury Emissions Control Technologies - Long-term Operation...  

NLE Websites -- All DOE Office Websites (Extended Search)

Papers and Publications: Long-Term Evaluation of Activated Carbon Injection for Mercury Control Upstream of a COHPAC Fabric Filter PDF-298KB presented at Air Quality IV...

400

Mercury removal from coal by leaching with sulfur-dioxide.  

E-Print Network (OSTI)

??Mercury from coal-fired utilities has been identified as one of the most hazardous air pollutants and the greatest potential public health concern. Furthermore, it has… (more)

Chateker, Poornima.

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

DOE/NETL & EPRI Sponsored Mercury Measurements Workshop  

NLE Websites -- All DOE Office Websites (Extended Search)

NETL & EPRI Sponsored Mercury Measurements Workshop July 13, 2004 Table of Contents Disclaimer Papers and Presentations Disclaimer This report was prepared as an account of work...

402

Mercury Vapor At Medicine Lake Area (Kooten, 1987) | Open Energy  

Open Energy Info (EERE)

Kooten, 1987) Kooten, 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Mercury Vapor At Medicine Lake Area (Kooten, 1987) Exploration Activity Details Location Medicine Lake Area Exploration Technique Mercury Vapor Activity Date Usefulness could be useful with more improvements DOE-funding Unknown References Gerald K. Van Kooten (1987) Geothermal Exploration Using Surface Mercury Geochemistry Retrieved from "http://en.openei.org/w/index.php?title=Mercury_Vapor_At_Medicine_Lake_Area_(Kooten,_1987)&oldid=386431" Category: Exploration Activities What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation:

403

Mercury Geochemical, Groundwater Geochemical, And Radiometric Geophysical  

Open Energy Info (EERE)

Geochemical, Groundwater Geochemical, And Radiometric Geophysical Geochemical, Groundwater Geochemical, And Radiometric Geophysical Signatures At Three Geothermal Prospects In Northern Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Mercury Geochemical, Groundwater Geochemical, And Radiometric Geophysical Signatures At Three Geothermal Prospects In Northern Nevada Details Activities (14) Areas (3) Regions (0) Abstract: Ground water sampling, desorbed mercury soil geochemical surveys and a radiometric geophysical survey was conducted in conjunction with geological mapping at three geothermal prospects in northern Nevada. Orientation sample lines from 610 m (2000 ft.) to 4575 m (15,000 ft.) in length were surveyed at right angles to known and suspected faults. Scintillometer readings (gamma radiation - total counts / second) were also

404

Novel Solution of Mercury Perihelion Shift  

E-Print Network (OSTI)

We present a novel solution of the Mercury perihelion advance shift in the new gravity model. It is found that the non-relativistic reduction of the Dirac equation with the gravitational potential produces the new gravitational potential of $\\displaystyle{V(r)=-{GMm\\over r}+{G^2M^2m^2\\over 2mc^2r^2}}$. This potential can explain the Mercury perihelion advance shift without any free parameters. Also, it can give rise to the $\\omega-$shift of the GPS satellite where the advance shift amounts to $({\\Delta \\omega\\over \\omega})_{th} \\simeq 3.4\\times 10^{-10}$ which should be compared to the recent observed value of $({\\Delta \\omega\\over \\omega})_{exp} \\simeq 4.5\\times 10^{-10}$.

Takehisa Fujita; Naohiro Kanda

2009-11-11T23:59:59.000Z

405

NETL: IEP - Mercury Emissions Control: Methods Development  

NLE Websites -- All DOE Office Websites (Extended Search)

Methods Development Methods Development EPRI and NETL collaboratively funded a $3-million program under the DOE/ University of North Dakota Energy and Environmental Research Center (UNDEERC) Jointly Sponsored Research Program (JSRP) to evaluate, develop, and validate a mercury speciation method for coal-fired produced flue gas. There was a 60/40 percent split of the funding, as required under the JSRP for this two-year effort. The work conducted by the EERC identified the Ontario Hydro Method as the best mercury speciation method. The EERC has validated the Ontario Hydro Method at both pilot- and full-scale levels. Radian International aided in the full-scale validation, with a written protocol of the method being finalized through the American Society for Testing and Materials (ASTM).

406

FUNDAMENTALS OF MERCURY OXIDATION IN FLUE GAS  

Science Conference Proceedings (OSTI)

The objective of this project is to understand the importance of and the contribution of gas-phase and solid-phase coal constituents in the mercury oxidation reactions. The project involves two experimental scales and a modeling effort. The team is comprised of University of Utah, Reaction Engineering International, and University of Connecticut. The objective is to determine the experimental parameters of importance in the homogeneous and heterogeneous oxidation reactions; validate models; and, improve existing models. Parameters to be studies include HCl, NOx, and SO{sub 2} concentrations, ash constituents, and temperature. This report summarizes Year 1 results for the experimental and modeling tasks. Experiments in the drop tube are just beginning and a new, speciated mercury analyzer is up and running. A preliminary assessment has been made for the drop tube experiments using the existing model of gas-phase kinetics.

JoAnn S. Lighty; Geoffrey Silcox; Andrew Fry; Constance Senior; Joseph Helble

2004-08-01T23:59:59.000Z

407

Ambient Hydro Ltd | Open Energy Information  

Open Energy Info (EERE)

Ambient Hydro Ltd Ambient Hydro Ltd Place Corsham, United Kingdom Zip SN13 9TZ Sector Hydro, Services Product Ambient Hydro Ltd develops small Hydroelectric projects. It also offers a range of technical and financial consultancy services. Coordinates 51.431505°, -2.187229° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.431505,"lon":-2.187229,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

408

Mercury Detoxification by Bacteria: Simulations of Transcription Activation and Mercury-Carbon Bond Cleavage  

Science Conference Proceedings (OSTI)

In this chapter, we summarize recent work from our laboratory and provide new perspective on two important aspects of bacterial mercury resistance: the molecular mechanism of transcriptional regulation by MerR, and the enzymatic cleavage of the Hg-C bond in methylmercury by the organomercurial lyase, MerB. Molecular dynamics (MD) simulations of MerR reveal an opening-and-closing dynamics, which may be involved in initiating transcription of mercury resistance genes upon Hg(II) binding. Density functional theory (DFT) calculations on an active-site model of the enzyme reveal how MerB catalyzes the Hg-C bond cleavage using cysteine coordination and acid-base chemistry. These studies provide insight into the detailed mechanisms of microbial gene regulation and defense against mercury toxicity.

Guo, Hao-Bo [ORNL; Parks, Jerry M [ORNL; Johs, Alexander [ORNL; Smith, Jeremy C [ORNL

2011-01-01T23:59:59.000Z

409

Gravitomagnetism and the Earth-Mercury range  

E-Print Network (OSTI)

We numerically work out the impact of the general relativistic Lense-Thirring effect on the Earth-Mercury range caused by the gravitomagnetic field of the rotating Sun. The peak-to peak nominal amplitude of the resulting time-varying signal amounts to 1.75 10^1 m over a temporal interval 2 yr. Future interplanetary laser ranging facilities should reach a cm-level in ranging to Mercury over comparable timescales; for example, the BepiColombo mission, to be launched in 2014, should reach a 4.5 - 10 cm level over 1 - 8 yr. We looked also at other Newtonian (solar quadrupole mass moment, ring of the minor asteroids, Ceres, Pallas, Vesta, Trans-Neptunian Objects) and post-Newtonian (gravitoelectric Schwarzschild solar field) dynamical effects on the Earth-Mercury range. They act as sources of systematic errors for the Lense-Thirring signal which, in turn, if not properly modeled, may bias the recovery of some key parameters of such other dynamical features of motion. Their nominal peak-to-peak amplitudes are as large as 4 10^5 m (Schwarzschild), 3 10^2 m (Sun's quadrupole), 8 10^1 m (Ceres, Pallas, Vesta), 4 m (ring of minor asteroids), 8 10^-1 m (Trans-Neptunian Objects). Their temporal patterns are different with respect to that of the gravitomagnetic signal.

Lorenzo Iorio

2010-02-01T23:59:59.000Z

410

HISTORY OF MERCURY USE AND ENVIRONMENTAL CONTAMINATION  

SciTech Connect

Between 1950 and 1963 approximately 11 million kilograms of mercury (Hg) were used at the Oak Ridge Y-12 National Security Complex (Y-12 NSC) for lithium isotope separation processes. About 3% of the Hg was lost to the air, soil and rock under facilities, and East Fork Poplar Creek (EFPC) which originates in the plant site. Smaller amounts of Hg were used at other Oak Ridge facilities with similar results. Although the primary Hg discharges from Y-12 NSC stopped in 1963, small amounts of Hg continue to be released into the creek from point sources and diffuse contaminated soil and groundwater sources within Y-12 NSC. Mercury concentration in EFPC has decreased 85% from not, vert, similar2000 ng/L in the 1980s. In general, methylmercury concentrations in water and in fish have not declined in response to improvements in water quality and exhibit trends of increasing concentration in some cases.Mercury discharges from an industrial plant have created a legacy contamination problem exhibiting complex and at times counter-intuitive patterns in Hg cycling.

Brooks, Scott C [ORNL; Southworth, George R [ORNL

2011-01-01T23:59:59.000Z

411

The free precession and libration of Mercury  

E-Print Network (OSTI)

An analysis based on the direct torque equations including tidal dissipation and a viscous core-mantle coupling is used to determine the damping time scales of O(10^5) years for free precession of the spin about the Cassini state and free libration in longitude for Mercury. The core-mantle coupling dominates the damping over the tides by one to two orders of magnitude for the plausible parameters chosen. The short damping times compared with the age of the solar system means we must find recent or on-going excitation mechanisms if such free motions are found by the current radar experiments or the future measurement by the MESSENGER and BepiColombo spacecraft that will orbit Mercury. We also show that the average precession rate is increased by about 30% over that obtained from the traditional precession constant because of a spin-orbit resonance induced contribution by the C_{22} term in the expansion of the gravitational field. The C_{22} contribution also causes the path of the spin during the precession to be slightly elliptical with a variation in the precession rate that is a maximum when the obliquity is a minimum. An observable free precession will compromise the determination of obliquity of the Cassini state and hence of C/MR^2 for Mercury, but a detected free libration will not compromise the determination of the forced libration amplitude and thus the verification of a liquid core

S. J. Peale

2005-07-06T23:59:59.000Z

412

Mercury-selenium interactions in the environment  

Science Conference Proceedings (OSTI)

The Clean Air Act Amendments of 1990 require the U.S. Environmental Protection Agency (EPA) to consider the need to control emissions of trace elements and compounds emitted from coal combustion, including coal-fired power plants. Concern has been expressed about emissions of mercury and arsenic, for example, since health effects may be associated with exposure to some of these compounds. By and large, effects of trace element emissions have been considered individually, without regard for possible interactions. To the extent that the relevant environmental pathways and health endpoints differ, this mode of analysis is appropriate. For example, arsenic is considered a carcinogen and mercury affects the brain. However, there may be compelling reasons to consider emissions of mercury (Hg) and selenium (Se) together: (1) Both Se and Hg are emitted from power plants primarily as vapors. (2) Hg and Se are both found in fish, which is the primary pathway for Hg health effects. (3) Se has been shown to suppress Hg methylation in aqueous systems, which is a necessary step for Hg health effects at current environmental concentrations. (4) Se is a trace element that is essential for health but that can also be toxic at high concentrations; it can thus have both beneficial and adverse health effects, depending on the dosage. This paper reviews some of the salient characteristics and interactions of the Hg-Se system, to consider the hypothesis that the effects of emissions of these compounds should be considered jointly.

Saroff, L. [Department of Energy, Washington, DC (United States); Lipfert, W.; Moskowitz, P.D. [Brookhaven National Lab., Upton, NY (United States). Dept. of Applied Science

1996-02-01T23:59:59.000Z

413

Use of sulfide-containing liquors for removing mercury from flue gases  

DOE Patents (OSTI)

A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions may include at least one of: sulfidic waste water, kraft caustic liquor, kraft carbonate liquor, potassium sulfide, sodium sulfide, and thioacetamide. The sulfide ion source is introduced into the scrubbing liquor as an aqueous sulfide species. The scrubber may be either a wet or dry scrubber for flue gas desulfurization systems.

Nolan, Paul S. (North Canton, OH); Downs, William (Alliance, OH); Bailey, Ralph T. (Uniontown, OH); Vecci, Stanley J. (Alliance, OH)

2003-01-01T23:59:59.000Z

414

Fundamentals of Mercury Oxidation in Flue Gas  

SciTech Connect

The objective of this project was to understand the importance of and the contribution of gas-phase and solid-phase coal constituents in the mercury oxidation reactions. The project involved both experimental and modeling efforts. The team was comprised of the University of Utah, Reaction Engineering International, and the University of Connecticut. The objective was to determine the experimental parameters of importance in the homogeneous and heterogeneous oxidation reactions; validate models; and, improve existing models. Parameters studied include HCl, NO{sub x}, and SO{sub 2} concentrations, ash constituents, and temperature. The results suggested that homogeneous mercury oxidation is below 10% which is not consistent with previous data of others and work which was completed early in this research program. Previous data showed oxidation above 10% and up to 100%. However, the previous data are suspect due to apparent oxidation occurring within the sampling system where hypochlorite ion forms in the KCl impinger, which in turn oxidized mercury. Initial tests with entrained iron oxide particles injected into a flame reactor suggest that iron present on fly ash particle surfaces can promote heterogeneous oxidation of mercury in the presence of HCl under entrained flow conditions. Using the data generated above, with homogeneous reactions accounting for less than 10% of the oxidation, comparisons were made to pilot- and full-scale data. The results suggest that heterogeneous reactions, as with the case of iron oxide, and adsorption on solid carbon must be taking place in the full-scale system. Modeling of mercury oxidation using parameters from the literature was conducted to further study the contribution of homogeneous pathways to Hg oxidation in coal combustion systems. Calculations from the literature used rate parameters developed in different studies, in some cases using transition state theory with a range of approaches and basis sets, and in other cases using empirical approaches. To address this, rate constants for the entire 8-step homogeneous Hg oxidation sequence were developed using an internally consistent transition state approach. These rate constants when combined with the appropriate sub-mechanisms produced lower estimates of the overall extent of homogeneous oxidation, further suggesting that heterogeneous pathways play an important role in Hg oxidation in coal-fired systems.

JoAnn Lighty; Geoffrey Silcox; Constance Senior; Joseph Helble; Balaji Krishnakumar

2008-07-31T23:59:59.000Z

415

Radiotracer Dilution Method for Mercury Inventory Study in Electrolytic Cells  

Science Conference Proceedings (OSTI)

Purpose of the experiment is to demonstrate feasibility the use of radiotracer to measure weight of mercury in electrolytic cells of soda industry. The weight of mercury in each cell of the plant is designed approximately 1700 kg. Radiotracer is prepared by mixing {sup 203}Hg radioactive mercury with 2400 g of inactive mercury in a bath. The respective precisely weighted mercury aliquots to be injected into the cells are prepared by pouring approximately 130 g of radioactive mercury taken from the bath into 13 standard vials, in accordance with the number of the cells tested. Four standard references prepared by further dilution of {+-}2 g active mercury taken from the bath to obtain the dilution factors range of 12,000 to 20,000 from which the calibration graph is constructed. The injection process is conducting by pouring the radioactive mercury from aliquots into the flowing mercury at the inlet side of the cell and allows them to mix thoroughly. It is assumed that the mass of the radiotracer injected into a closed system remains constant, at least during the period of the test. From this experiment it was observed that the mixing time is two days after injection of radioactive mercury. The inactive mercury in each electrolytic cell calculated by the radiotracer method is of the range 1351.529 kg to 1966.354 kg with maximum error (95% confidence) is 1.52 %. The accuracy of measurement of the present method is better than gravimetric one which accounts 4 % of error on average.

Sugiharto [Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jl. Ganesha 10, Bandung 40132 (Indonesia); Centre for Application of Isotopes and Radiation Technology, National Nuclear Energy Agency, Jl. Lebak Bulus Raya No 49, Jakarta 12440 (Indonesia); Su'ud, Zaki; Kurniadi, Rizal; Waris, Abdul [Department of Physics, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Jl. Ganesha 10, Bandung 40132 (Indonesia); Santoso, Sigit Budi; Abidin, Zainal [Centre for Application of Isotopes and Radiation Technology, National Nuclear Energy Agency, Jl. Lebak Bulus Raya No 49, Jakarta 12440 (Indonesia); Santoso, Gatot Budi [PT. Industri Soda Indonesia, Jl. Raya Waru 31, Sidoarjo 61256 (Indonesia)

2010-06-22T23:59:59.000Z

416

Interim Results from a Study of the Impacts of Tin (II) Based Mercury Treatment in a Small Stream Ecosystem: Tims Branch, Savannah River Site  

SciTech Connect

A research team is assessing the impacts of an innovative mercury treatment system in Tims Branch, a small southeastern stream. The treatment system, installed in 2007, reduces and removes inorganic mercury from water using tin(II) (stannous) chloride addition followed by air stripping. The system results in discharge of inorganic tin to the ecosystem. This screening study is based on historical information combined with measurements of contaminant concentrations in water, fish, sediment, biofilms and invertebrates. Initial mercury data indicate that first few years of mercury treatment resulted in a significant decrease in mercury concentration in an upper trophic level fish, redfin pickerel, at all sampling locations in the impacted reach. For example, the whole body mercury concentration in redfin pickerel collected from the most impacted pond decreased approximately 72% between 2006 (pre-treatment) and 2010 (post-treatment). Over this same period, mercury concentrations in the fillet of redfin pickerel in this pond were estimated to have decreased from approximately 1.45 {micro}g/g (wet weight basis) to 0.45 {micro}g/g - a decrease from 4.8x to 1.5x the current EPA guideline concentration for mercury in fillet (0.3 {micro}g/g). Thermodynamic modeling, scanning electron microscopy, and other sampling data for tin suggest that particulate tin (IV) oxides are a significant geochemical species entering the ecosystem with elevated levels of tin measured in surficial sediments and biofilms. Detectable increases in tin in sediments and biofilms extended approximately 3km from the discharge location. Tin oxides are recalcitrant solids that are relatively non-toxic and resistant to dissolution. Work continues to develop and validate methods to analyze total tin in the collected biota samples. In general, the interim results of this screening study suggest that the treatment process has performed as predicted and that the concentration of mercury in upper trophic level fish, as a surrogate for all of the underlying transport and transformation processes in a complex ecosystem, has declined as a direct result of the elimination of inorganic mercury inputs. Inorganic tin released to the ecosystem has been found in compartments where particles accumulate with notable levels measured in biofilms.

Looney, Brian [Savannah River National Laboratory (SRNL); BryanJr., Larry [Savannah River Ecology Laboratory; Mathews, Teresa J [ORNL; Peterson, Mark J [ORNL; Roy, W Kelly [ORNL; Jett, Robert T [ORNL; Smith, John G [ORNL

2012-03-01T23:59:59.000Z

417

The ambient wood journals: replaying the experience  

Science Conference Proceedings (OSTI)

The Ambient Wood project aims to facilitate a learning experience using an adaptive infrastructure in an outdoor environment. This involves sensor technology, virtual world orchestration, and a wide range of devices ranging from hand-held computers to ... Keywords: adaptive infrastructure, consolidation, record and replay, storytelling

Mark J. Weal; Danius T. Michaelides; Mark K. Thompson; David C. DeRoure

2003-08-01T23:59:59.000Z

418

Visual calibration and correction for ambient illumination  

Science Conference Proceedings (OSTI)

Many applications require that an image will appear the same regardless of where or how it is displayed. However, the conditions in which an image is displayed can adversely affect its appearance. Computer monitor screens not only emit light, but can ... Keywords: Viewing conditions, ambient illumination, contrast correction, device independence, ergonomics, perceptually accurate display, reflections

Kate Devlin; Alan Chalmers; Erik Reinhard

2006-10-01T23:59:59.000Z

419

NETL: Mercury Emissions Control Technologies - Amended Silicates for  

NLE Websites -- All DOE Office Websites (Extended Search)

Amended Silicates for Mercury Control Amended Silicates for Mercury Control The project is designed to implement a comprehensive demonstration of the use of Amended Silicates for mercury control on a commercial-scale generating unit. Miami Fort Unit 6 burns eastern bituminous coal, has a nominal output of 175 MW, and a flue gas volumetric flow of 535,000 actual cubic feet per minute (acfm) at full load. The demonstration includes a baseline phase with no injection of mercury control sorbents, injection of carbon to develop a mercury-control technology baseline for sorbent performance comparison, and the injection of Amended Silicates at several rates. All sorbent will be injected upstream of the existing electro-static precipitators (ESPs) on the host unit, providing a nominal 1-second contact time before the gas flow enters an ESP. Mercury measurements will be made upstream of the sorbent injection and downstream of the first ESP to characterize the performance of the sorbent technologies. In addition, samples of coal and fly ash will be collected and analyzed to provide data for a mercury mass balance for the unit. The mercury measurements will be made with continuous emissions monitors as well as with Ontario-Hydro wet-chemistry sampling. Samples of fly ash plus sorbent from demonstration cases which include Amended Silicate sorbent injection will be collected from ESP hoppers for use in concrete testing to confirm the suitability of the material as a portland cement replacement.

420

Elevated Mercury Concentrations in Humans of Madre de  

E-Print Network (OSTI)

The enormous increase in practically unregulated mining in Madre de Dios Peru is leading to massive release of liquid elemental mercury to the environment. Rapidly increasing global prices for gold are causing a massive upsurge in artisanal mining in the Peruvian Amazon, considered to be one of the most biodiverse places on the planet. This study identifies the current levels of mercury in the human population, through identifying levels of total mercury in human hair in mining zones of Madre de Dios Department and in the nearby city of Puerto Maldonado. A regression analysis reveals that fish consumption, gender, and location of residence were significant indicators of mercury levels; while duration of residence and age had no significant relationship to mercury levels. Increased fish consumption levels were the strongest indicators of increased total mercury levels across the entire population. The levels of total mercury in hair was significantly (a = 0.05) higher in mining zones, than Puerto Maldonado. In both areas men had significantly higher levels than women, likely due to a difference in metabolism or varying levels of direct involvement in gold mining- a male predominated industry. This is the first study to show the health threat that mercury poses to this region, however further research needs to be done to gain a

Dios Peru; Katy Ashe

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ambient mercury species" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Mercury removal in utility wet scrubber using a chelating agent  

DOE Patents (OSTI)

A method for capturing and reducing the mercury content of an industrial flue gas such as that produced in the combustion of a fossil fuel or solid waste adds a chelating agent, such as ethylenediaminetetraacetic acid (EDTA) or other similar compounds like HEDTA, DTPA and/or NTA, to the flue gas being scrubbed in a wet scrubber used in the industrial process. The chelating agent prevents the reduction of oxidized mercury to elemental mercury, thereby increasing the mercury removal efficiency of the wet scrubber. Exemplary tests on inlet and outlet mercury concentration in an industrial flue gas were performed without and with EDTA addition. Without EDTA, mercury removal totaled 42%. With EDTA, mercury removal increased to 71%. The invention may be readily adapted to known wet scrubber systems and it specifically provides for the removal of unwanted mercury both by supplying S.sup.2- ions to convert Hg.sup.2+ ions into mercuric sulfide (HgS) and by supplying a chelating agent to sequester other ions, including but not limited to Fe.sup.2+ ions, which could otherwise induce the unwanted reduction of Hg.sup.2+ to the form, Hg.sup.0.

Amrhein, Gerald T. (Louisville, OH)

2001-01-01T23:59:59.000Z

422

NETL: Mercury Emissions Control Technologies - On-Site Production of  

NLE Websites -- All DOE Office Websites (Extended Search)

On-Site Production of Mercury Sorbent with Low Concrete Impact On-Site Production of Mercury Sorbent with Low Concrete Impact The detrimental health effects of mercury are well documented. Furthermore, it has been reported that U.S. coal-fired plants emit approximately 48 tons of mercury a year. To remedy this, the U.S. Environmental Protection Agency (EPA) released the Clean Air Mercury Rule (CAMR) on March 15, 2005. A promising method to achieve the mandated mercury reductions is activated carbon injection (ACI). While promising, the current cost of ACI for mercury capture is expensive, and ACI adversely impacts the use of the by-product fly-ash for concrete. Published prices for activated carbon are generally 0.5-1 $/lb and capital costs estimates are 2-55 $/KW. Because of the high costs of ACI, Praxair started feasibility studies on an alternative process to reduce the cost of mercury capture. The proposed process is composed of three steps. First, a hot oxidant mixture is created by using a proprietary Praxair burner. Next, the hot oxidant is allowed to react with pulverized coal and additives. The resulting sorbent product is separated from the resulting syngas. In a commercial installation, the resulting sorbent product would be injected between the air-preheater and the particulate control device.

423

XAS Catches the Chemical Form of Mercury in Fish  

NLE Websites -- All DOE Office Websites (Extended Search)

view large image view large image contact info Friday, 29 August 2003 X-ray Absorption Spectroscopy Catches the Chemical Form of Mercury in Fish - SSRL Scientists Reveal New Findings in Science Article The presence of "methyl mercury" in fish is well-known, but until now the detailed chemical identity of the mercury has remained a mystery. In an x-ray absorption spectroscopy study published in the August 29 issue of Science (Science 301, 2003: 1203; Science now: Murky Picture on Fish Mercury), SSRL scientists report that the chemical form of mercury involves a sulfur atom (most likely in a so-called aliphatic form). The study presents significant new knowledge - because the toxic properties of mercury (or any element) are critically dependent upon its chemical form - and represents an important milestone in developing an understanding of how harmful mercury in fish might actually be. The study was carried out by SSRL staff scientists Ingrid Pickering and Graham George and postdoctoral fellow Hugh Harris using SSRL's structural molecular biology beam line 9-3. The very high flux, excellent beam stability and state-of-the-art detector technology allowed the team to measure samples of fish containing micromolar levels of mercury, much lower than had previously been possible.

424

MERCURY CONTROL WITH CALCIUM-BASED SORBENTS AND OXIDIZING AGENTS  

SciTech Connect

The initial tasks of this DOE funded project to investigate mercury removal by calcium-based sorbents have been completed, and initial testing results have been obtained. Mercury monitoring capabilities have been obtained and validated. An approximately 1MW (3.4 Mbtu/hr) Combustion Research Facility at Southern Research Institute was used to perform pilot-scale investigations of mercury sorbents, under conditions representative of full-scale boilers. The initial results of ARCADIS G&M proprietary sorbents, showed ineffective removal of either elemental or oxidized mercury. Benchscale tests are currently underway to ascertain the importance of differences between benchscale and pilot-scale experiments. An investigation of mercury-capture temperature dependence using common sorbents has also begun. Ordinary hydrated lime removed 80 to 90% of the mercury from the flue gas, regardless of the temperature of injection. High temperature injection of hydrated lime simultaneously captured SO{sub 2} at high temperatures and Hg at low temperatures, without any deleterious effects on mercury speciation. Future work will explore alternative methods of oxidizing elemental mercury.

Thomas K. Gale

2002-06-01T23:59:59.000Z

425

Method for removal of mercury from various gas streams  

DOE Patents (OSTI)

The invention provides for a method for removing elemental mercury from a fluid, the method comprising irradiating the mercury with light having a wavelength of approximately 254 nm. The method is implemented in situ at various fuel combustion locations such as power plants and municipal incinerators.

Granite, E.J.; Pennline, H.W.

2003-06-10T23:59:59.000Z

426

Mercury concentrations in tissues of Florida bald eagles  

Science Conference Proceedings (OSTI)

We collected 48 blood and 61 feather samples from nestling bald eagles at 42 nests and adult feather samples from 20 nests in north and central Florida during 1991-93. We obtained 32 liver, 10 feather, and 5 blood samples from 33 eagle carcasses recovered in Florida during 1987-93. For nestlings, mercury concentrations in blood (GM = 0.16 ppm wet wt) and feather (GM = 3.23 ppm) samples were correlated (r = 0.69, P = 0.0001). Although nestlings had lower mercury concentrations in feathers than did adults (GM = 6.03 ppm), the feather mercury levels in nestlings and adults from the same nest were correlated (r = 0.63, P eagles (GM = 0.23 ppm) was similar to Florida nestlings but some Florida nestlings had blood mercury concentrations up to 0.61 ppm, more than twice as high as captive adults. Feather mercury concentrations in both nestlings and adults exceeded those in captive eagles, but concentrations in all tissues were similar to, or lower than, those in bald eagles from other wild populations. Although mercury concentrations in Florida eagles are below those that cause mortality, they are in the range of concentrations that can cause behavioral changes or reduce reproduction. We recommend periodic monitoring of mercury in Florida bald eagles for early detection of mercury increases before negative effects on reproduction occur. 26 refs., 5 figs., 2 tabs.

Wood, P.B.; Wood, J.M. [Wes Virginia Univ., Morgantown, WV (United States); White, J.H. [Florida Game and Fresh Water Fish Commission, Eustis, FL (United States)] [and others

1996-01-01T23:59:59.000Z

427

PyMercury: Interactive Python for the Mercury Monte Carlo Particle Transport Code  

SciTech Connect

Monte Carlo particle transport applications are often written in low-level languages (C/C++) for optimal performance on clusters and supercomputers. However, this development approach often sacrifices straightforward usability and testing in the interest of fast application performance. To improve usability, some high-performance computing applications employ mixed-language programming with high-level and low-level languages. In this study, we consider the benefits of incorporating an interactive Python interface into a Monte Carlo application. With PyMercury, a new Python extension to the Mercury general-purpose Monte Carlo particle transport code, we improve application usability without diminishing performance. In two case studies, we illustrate how PyMercury improves usability and simplifies testing and validation in a Monte Carlo application. In short, PyMercury demonstrates the value of interactive Python for Monte Carlo particle transport applications. In the future, we expect interactive Python to play an increasingly significant role in Monte Carlo usage and testing.

Iandola, F N; O'Brien, M J; Procassini, R J

2010-11-29T23:59:59.000Z

428

Semi-Continuous Detection of Mercury in Gases  

NLE Websites -- All DOE Office Websites (Extended Search)

Continuous Detection of Mercury in Gases Continuous Detection of Mercury in Gases Opportunity Research is currently active on the patented technology "Semi-Continuous Detection of Mercury in Gases." The technology, which is a spinoff of the National Energy Technology Laboratory's (NETL) GP-254 Process (U.S. patent 6,576,092), is available for licensing and/or further collaborative research from the U.S. Department of Energy's NETL. Overview This invention discloses a method for the quantitative detection of heavy metals, especially mercury, in effluent gas streams. The method employs photo-deposition and an array of surface acoustic wave sensors where each sensor monitors a specific metal. The U.S. Environmental Protection Agency issued a national regulation for mercury removal from coal-derived flue and fuel gases in December 2011,

429

Thermally Speciated Mercury in Mineral Exploration | Open Energy  

Open Energy Info (EERE)

Thermally Speciated Mercury in Mineral Exploration Thermally Speciated Mercury in Mineral Exploration Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Thermally Speciated Mercury in Mineral Exploration Abstract Abstract unavailable. Author S.C. Smith Conference IGES; Dublin, CA; 2003/09/01 Published IGES, 2003 DOI Not Provided Check for DOI availability: http://crossref.org Citation S.C. Smith. 2003. Thermally Speciated Mercury in Mineral Exploration. In: Programs & Abstracts: Soil and Regolith Geochemistry in the Search for Mineral Deposits. IGES; 2003/09/01; Dublin, CA. Dublin, CA: IGES; p. 78 Retrieved from "http://en.openei.org/w/index.php?title=Thermally_Speciated_Mercury_in_Mineral_Exploration&oldid=681717" Categories: References Geothermal References

430

Regional and Global Data in Mercury, December 2000  

NLE Websites -- All DOE Office Websites (Extended Search)

Regional and Global Data in Mercury Regional and Global Data in Mercury Regional and global biogeochemical dynamics data can now be located and acquired through a metadata search system at the ORNL DAAC. Climate, hydroclimatology, soil, and vegetation data held by data centers around the world are available through a Web-based system called "Mercury." Mercury allows users to search metadata files to identify data sets of interest, and it directs the users to the data. The data sets indexed in Mercury were chosen by the ORNL DAAC's User Working Group as important to the global change research community for understanding the function of terrestrial ecosystems and for examining patterns across temporal and spatial scales. The following types of regional and global data are currently indexed in

431

NETL: Mercury Emissions Control Technologies - Preliminary Field Evaluation  

NLE Websites -- All DOE Office Websites (Extended Search)

Preliminary Field Evaluation of Mercury Control Using Combustion Modifications Preliminary Field Evaluation of Mercury Control Using Combustion Modifications General Electric – Energy and Environmental Research Corporation is developing a new technology that reduces the cost of mercury removal from flue gas by combining it with carbon reduction in a burnout system and simultaneously controlling nitrogen oxides emissions. Data on mercury removal at Western Kentucky Electric’s Green Station will be obtained and used to assess options to improve the efficiency of mercury removal. These options will be further investigated in pilot-scale testing on a 300 kW combustor. Related Papers and Publications: Preliminary Field Evaluation of Hg Control Using Combustion Modifications [PDF-732KB] - Presented at the 2004 Electric Utilities Environmental Conference, Tucson, AZ - January 19-22, 2004.

432

Innovative Mercury Treatment Benefits Stream, Fish | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Mercury Treatment Benefits Stream, Fish Mercury Treatment Benefits Stream, Fish Innovative Mercury Treatment Benefits Stream, Fish October 1, 2012 - 12:00pm Addthis Oak Ridge scientists Kelly Roy, left, and Trent Jett collect fish samples in 2011 to support research on the impacts of the treatment in Tims Branch, a small stream at the Savannah River Site. Oak Ridge scientists Kelly Roy, left, and Trent Jett collect fish samples in 2011 to support research on the impacts of the treatment in Tims Branch, a small stream at the Savannah River Site. The M1 Air Stripper system at Savannah River Site, pictured here, was modified in 2007 to remove mercury. The M1 Air Stripper system at Savannah River Site, pictured here, was modified in 2007 to remove mercury. Oak Ridge scientists Kelly Roy, left, and Trent Jett collect fish samples in 2011 to support

433

Remediation of Mercury and Industrial Contaminants Applied Field Research  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Remediation of Mercury and Industrial Contaminants Applied Field Remediation of Mercury and Industrial Contaminants Applied Field Research Initiative (RoMIC-AFRI) Remediation of Mercury and Industrial Contaminants Applied Field Research Initiative (RoMIC-AFRI) Remediation of Mercury and Industrial Contaminants Applied Field Research Initiative (RoMIC-AFRI) Located on the Oak Ridge Reservation (ORR) in Oak Ridge, Tennessee, the RoMIC-AFRI was established to protect water resources by addressing the challenge of preventing contamination. The initiative at Oak Ridge is a collaborative effort that leverages DOE investments in basic science and applied research and the work of site contractors to address the complex challenges in the remediation of legacy waste at the Oak Ridge Reservation. The mission of the Remediation of Mercury and Industrial Contaminants

434

NETL: Mercury Emissions Control Technologies - Evaluation of Control  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluation of Control Strategies to Effectively Meet 70 - 90% Evaluation of Control Strategies to Effectively Meet 70 - 90% Mercury Reduction on an Eastern Bituminous Coal Cyclone Boiler with SCR The overall objective of this project is to assess the potential for significant mercury control, between 50 and 90% above baseline, by sorbent injection for the challenging technical process configuration at Public Service of New Hampshire Company Merrimack Station Unit No. 2. The primary emphasis of this project is to evaluate the performance of mercury sorbent injection, but the effect of co-benefits from SO3 mitigation on mercury control will also be explored. Also in this program the performance capabilities of mercury measurement techniques in challenging flue-gas environment will be assessed and the impact of activated carbon injection on fly ash disposal options will be investigated.

435

NETL: Mercury Emissions Control Technologies - University of North Dakota,  

NLE Websites -- All DOE Office Websites (Extended Search)

Table Of Contents for Field Testing Enhancing Carbon Reactivity in Mercury Control in Lignite-Fired Systems Mercury Oxidation Upstream of an ESP and Wet FGD Enhancing Carbon Reactivity in Mercury Control in Lignite-Fired Systems The scope of the project consists of attempting to control mercury at four different power plants using two novel concepts. The first concept is using furnace additives that will enhance the sorbent effectiveness for mercury capture. The other concept involves using novel treated carbons to significantly increase sorbent reactivity and resultant capture of Hg. The furnace additives will be tested at Leland Olds Station and Antelope Valley Station while the novel sorbents will be tested at Stanton Station Units 1 &10. Related Papers and Publications:

436

Microsoft PowerPoint - DOELM_Mercury_Storage.ppt  

Office of Legacy Management (LM)

Mercury Storage Concept Mercury Storage Concept Pre-Environmental Impact Statement Grand Junction, Colorado, Scoping Meeting Information 2 Mercury Export Ban Act Passed into law in October 2008 Purpose is to prohibit the export of mercury Identifies the Department of Energy (DOE) as the agency to provide long-term storage with collaboration from the Environmental Protection Agency (EPA) Requires: * Guidance on standards and procedures by October 1, 2009 * Facility will be constructed and operated to hazardous waste requirements * A facility be designated by January 1, 2010 * Operations to begin by January 1, 2013 3 Stockpiles of Mercury DOE stores approximately 1,200 metric tons at the Oak Ridge Reservation Department of Defense stores approximately 4,400 metric tons EPA estimates that between 7,500 and 10,000 metric

437

Bench-scale studies with mercury contaminated SRS soil  

SciTech Connect

The Savannah River Technology Center (SRTC) has been charactered by the Department of Enregy (DOE) - Office of Technology Development (OTD) to investigate vitrification technology for the treatment of Low Level Mixed Wastes (LLMW). In fiscal year 1995, LLW streams containing mercury and organics were targeted. This report will present the results of studies with mercury contaminated waste. In order to successfully apply vitrification technology to LLMW, the types and quantities of glass forming additives necessary for producing homogeneous glasses from the wastes had to be determined, and the treatment for the mercury portion had to also be determined. The selected additives had to ensure that a durable and leach resistant waste form was produced, while the mercury treatment had to ensure that hazardous amounts of mercury were not released into the environment.

Cicero, C.A.

1996-05-08T23:59:59.000Z

438

Mercury Emissions Control Technologies (released in AEO2006)  

Reports and Publications (EIA)

The AEO2006 reference case assumes that States will comply with the requirements of the EPAs new CAMR regulation. CAMR is a two-phase program, with a Phase I cap of 38 tons of mercury emitted from all U.S. power plants in 2010 and a Phase II cap of 15 tons in 2018. Mercury emissions in the electricity generation sector in 2003 are estimated at around 50 tons. Generators have a variety of options to meet the mercury limits, such as: switching to coal with a lower mercury content, relying on flue gas desulfurization or selective catalytic reduction equipment to reduce mercury emissions, or installing conventional activated carbon injection (ACI) technology.

Information Center

2006-03-20T23:59:59.000Z

439

EIS-0423: Storage and Management of Elemental Mercury | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

23: Storage and Management of Elemental Mercury 23: Storage and Management of Elemental Mercury EIS-0423: Storage and Management of Elemental Mercury Summary This EIS evaluates the environmental impacts associated with the reasonable alternatives for managing and storing elemental mercury at seven candidate locations (i.e., Colorado, Idaho, Missouri, Nevada, South Carolina, Texas, and Washington). The U.S. Environmental Protection Agency, the Texas Commission on Environmental Quality, and the Mesa County Board of Commissioners (Mesa County, Colorado) are cooperating agencies in the preparation of this EIS. Public Comment Opportunities None available at this time. Documents Available for Download June 5, 2012 EIS-0423-S1: Notice of Intent to Prepare a Supplemental Environmental Impact Statement Long-Term Management and Storage of Elemental Mercury