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Note: This page contains sample records for the topic "mercury levels cxs" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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1

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

2

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

3

Studies of Mercury in High Level Waste Systems  

Science Conference Proceedings (OSTI)

During nuclear weapons production, nuclear reactor target and fuel rods were processed in F- and H-Canyons. For the target rods, a caustic dissolution of the aluminum cladding was performed prior to nitric acid dissolution of the uranium metal targets in the large canyon dissolvers. To dissolve the aluminum cladding and the U-Al fuel, mercury in the form of soluble mercury (II) nitrate was added as a catalyst to accelerate the dissolution of the aluminum. F-Canyon began to process plutonium-containing residues that were packaged in aluminum cans and thus required the use of mercury as a dissolution catalyst. Following processing to remove uranium and plutonium using the solvent extraction process termed the Plutonium-Uranium Recovery by Extraction (PUREX) process, the acidic waste solutions containing fission products and other radionuclides were neutralized with sodium hydroxide. The mercury used in canyon processing is fractionated between the sludge and supernate that is transferred from the canyons to the tank farm. The sludge component of the waste is currently vitrified in the Defense Waste Processing Facility (DWPF). The vitrified waste canisters are to be sent to the federal repository for High Level Waste. The mercury in the sludge, presumably in an oxide or hydroxide form is reduced to elemental mercury by the chemical additions and high temperatures, steam stripped and collected in the Mercury Collection Tank. The mercury in the dilute supernate is in the form of mercuric ion and is soluble. During evaporation, the mercuric ion is reduced to elemental mercury, vaporizes into the overheads system and is collected as a metallic liquid in the Mercury Removal Tank.

Wilmarth, W.R.

2003-09-03T23:59:59.000Z

4

The impact of over 100 years of wildfires on mercury levels and accumulation rates in two lakes in southern California, USA  

E-Print Network (OSTI)

100 years of wild?res on mercury levels and accumulationbe an important source of mercury (Hg) to local watersheds.transport of gaseous mercury from a large scale Canadian

2010-01-01T23:59:59.000Z

5

Low-Cost Options for Moderate Levels of Mercury Control  

Science Conference Proceedings (OSTI)

This is the final technical report for a three-site project that is part of an overall program funded by the U.S. Department of Energy's National Energy Technology Laboratory (DOE/NETL) and industry partners to obtain the necessary information to assess the feasibility and costs of controlling mercury from coal-fired utility plants. This report summarizes results from tests conducted at MidAmerican's Louisa Generating Station and Entergy's Independence Steam Electric Station (ISES) and sorbent screening at MidAmerican's Council Bluffs Energy Center (CBEC) (subsequently renamed Walter Scott Energy Center (WSEC)). Detailed results for Independence and Louisa are presented in the respective Topical Reports. As no full-scale testing was conducted at CBEC, screening updates were provided in the quarterly updates to DOE. ADA-ES, Inc., with support from DOE/NETL, EPRI, and other industry partners, has conducted evaluations of EPRI's TOXECON II{trademark} process and of high-temperature reagents and sorbents to determine the capabilities of sorbent/reagent injection, including activated carbon, for mercury control on different coals and air emissions control equipment configurations. An overview of each plant configuration is presented: (1) MidAmerican's Louisa Generating Station burns Powder River Basin (PRB) coal in its 700-MW Unit 1 and employs hot-side electrostatic precipitators (ESPs) with flue gas conditioning for particulate control. This part of the testing program evaluated the effect of reagents used in the existing flue gas conditioning on mercury removal. (2) MidAmerican's Council Bluffs Energy Center typically burns PRB coal in its 88-MW Unit 2. It employs a hot-side ESP for particulate control. Solid sorbents were screened for hot-side injection. (3) Entergy's Independence Steam Electric Station typically burns PRB coal in its 880-MW Unit 2. Various sorbent injection tests were conducted on 1/8 to 1/32 of the flue gas stream either within or in front of one of four ESP boxes (SCA = 542 ft{sup 2}/kacfm), specifically ESP B. Initial mercury control evaluations indicated that although significant mercury control could be achieved by using the TOXECON II{trademark} design, the sorbent concentration required was higher than expected, possibly due to poor sorbent distribution. Subsequently, the original injection grid design was modeled and the results revealed that the sorbent distribution pattern was determined by the grid design, fluctuations in flue gas flow rates, and the structure of the ESP box. To improve sorbent distribution, the injection grid and delivery system were redesigned and the effectiveness of the redesigned system was evaluated. This project was funded through the DOE/NETL Innovations for Existing Plants program. It was a Phase II project with the goal of developing mercury control technologies that can achieve 50-70% mercury capture at costs 25-50% less than baseline estimates of $50,000-$70,000/lb of mercury removed. Results from testing at Independence indicate that the DOE goal was successfully achieved. Further improvements in the process are recommended, however. Results from testing at Louisa indicate that the DOE goal was not achievable using the tested high-temperature sorbent. Sorbent screening at Council Bluffs also indicated that traditional solid sorbents may not achieve significant mercury removal in hot-side applications.

Sharon Sjostrom

2008-02-09T23:59:59.000Z

6

Achieving very low mercury levels in refinery wastewater by membrane filtration.  

Science Conference Proceedings (OSTI)

Microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membranes were evaluated for their ability to achieve the world's most stringent Hg discharge criterion (oil refinery's wastewater. The membrane processes were operated at three different pressures to demonstrate the potential for each membrane technology to achieve the targeted effluent mercury concentrations. The presence of mercury in the particulate form in the refinery wastewater makes the use of MF and UF membrane technologies more attractive in achieving very low mercury levels in the treated wastewater. Both NF and RO were also able to meet the target mercury concentration at lower operating pressures (20.7 bar). However, higher operating pressures ({ge}34.5 bar) had a significant effect on NF and RO flux and fouling rates, as well as on permeate quality. SEM images of the membranes showed that pore blockage and narrowing were the dominant fouling mechanisms for the MF membrane while surface coverage was the dominant fouling mechanism for the other membranes. The correlation between mercury concentration and particle size distribution was also investigated to understand mercury removal mechanisms by membrane filtration. The mean particle diameter decreased with filtration from 1.1 {+-} 0.0 {micro}m to 0.74 {+-} 0.2 {micro}m after UF.

Urgun Demirtas, M.; Benda, P.; Gillenwater, P. S.; Negri, M. C.; Xiong, H.; Snyder, S. W. (Center for Nanoscale Materials); ( ES)

2012-05-15T23:59:59.000Z

7

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

8

Investigation of increased mercury levels in the fisheries of Lower East Fork Poplar Creek (Lefpc), Oak Ridge Reservation, Tennessee  

SciTech Connect

The DOE Western Environmental Technology Office (WETO) is supporting remediation efforts on the U.S. Department of Energy Oak Ridge Reservation in Oak Ridge, Tennessee by performing this study. MSE Technology Applications, Inc. (MSE) has performed a series of literature reviews and bench-scale testing to further evaluate the mercury problem in the Lower East Fork Poplar Creek (LEFPC) at Oak Ridge. The primary problem is that total mercury (HgT) levels in LEFPC water decrease, while HgT levels in sunfish muscle tissue increase, with distance away from the National Security Complex (NSC), despite extensive source control efforts at the facility and within downstream riparian zones. Furthermore, dissolved methylmercury (d-MeHg) levels increase downstream from the NSC, especially during warm weather and/or high flow events. MSE performed four test series that focused on conversion of aqueous phase elemental mercury (Hg deg. A) to methyl mercury (MeHg) by algal-bacterial bio-films (periphyton) present in the stream-bed of LEFPC. Small (mg/L) quantities of un-sulphured molasses and peptone were added to some of the Hinds Creek samples to stimulate initial bacterial growth. Other Hinds Creek samples either were dosed with glutaraldehyde to preclude microbial growth, or were wrapped in aluminum foil to preclude Hg photochemical redox effects. The bench-scale testing for Phase II was completed August 2006. The final reporting and the planning for Phase III testing are in progress. (authors)

Byrne-Kelly, D.; Cornish, J.; Hart, A. [MSE Technology Applications, Inc., 200 Technology Way, Butte, MT (United States); Southworth, G. [Oak Ridge National Laboratory, Oak Ridge, TN (United States); Sims, L. [Bechtel Jacobs Company, Oak Ridge, TN (United States)

2007-07-01T23:59:59.000Z

9

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

10

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.

11

IMPACT OF ELIMINATING MERCURY REMOVAL PRETREATMENT ON THE PERFORMANCE OF A HIGH LEVEL RADIOACTIVE WASTE MELTER OFFGAS SYSTEM  

DOE Green Energy (OSTI)

The Defense Waste Processing Facility at the Savannah River Site processes high-level radioactive waste from the processing of nuclear materials that contains dissolved and precipitated metals and radionuclides. Vitrification of this waste into borosilicate glass for ultimate disposal at a geologic repository involves chemically modifying the waste to make it compatible with the glass melter system. Pretreatment steps include removal of excess aluminum by dissolution and washing, and processing with formic and nitric acids to: (1) adjust the reduction-oxidation (redox) potential in the glass melter to reduce radionuclide volatility and improve melt rate; (2) adjust feed rheology; and (3) reduce by steam stripping the amount of mercury that must be processed in the melter. Elimination of formic acid pretreatment has been proposed to eliminate the production of hydrogen in the pretreatment systems; alternative reductants would be used to control redox. However, elimination of formic acid would result in significantly more mercury in the melter feed; the current specification is no more than 0.45 wt%, while the maximum expected prior to pretreatment is about 2.5 wt%. An engineering study has been undertaken to estimate the effects of eliminating mercury removal on the melter offgas system performance. A homogeneous gas-phase oxidation model and an aqueous phase model were developed to study the speciation of mercury in the DWPF melter offgas system. The model was calibrated against available experimental data and then applied to DWPF conditions. The gas-phase model predicted the Hg{sub 2}{sup 2-}/Hg{sup 2+} ratio accurately, but some un-oxidized Hg{sup 0} remained. The aqueous model, with the addition of less than 1 mM Cl{sub 2} showed that this remaining Hg{sup 0} would be oxidized such that the final Hg{sub 2}{sup 2+}/Hg{sup 2+} ratios matched the experimental data. The results of applying the model to DWPF show that due to excessive shortage of chloride, only 6% of the mercury fed is expected to be chlorinated, mostly as Hg{sub 2}Cl{sub 2}, while the remaining mercury would exist either as elemental mercury (90%) or HgO (4%).

Zamecnik, J; Alexander Choi, A

2009-03-17T23:59:59.000Z

12

Tuna fish diet influences cat behavior. [Elevated levels of selenium and mercury in commercial tuna fish cat food  

SciTech Connect

When observed in their home cages, cats fed commercial tuna fish cat food were less active, vocalized less, and spent more time on the floor and more time eating than cats fed commercial beef cat food. There were no differences in response to human handling between the two groups. There were no differences in learning ability on a two-choice point maze or in reversal learning in the same maze between beef- and tuna-fed cats. The behavior of the groups differed in a 15-min open field test only in the number of toys contacted. Cats fed the tuna had elevated tissue levels of mercury and selenium.

Houpt, K.A.; Essick, L.A.; Shaw, E.B.; Alo, D.K.; Gilmartin, J.E.; Gutenmann, W.H.; Littman, C.B.; Lisk, D.J.

1988-01-01T23:59:59.000Z

13

IMPACT OF NOBLE METALS AND MERCURY ON HYDROGEN GENERATION DURING HIGH LEVEL WASTE PRETREATMENT AT THE SAVANNAH RIVER SITE  

DOE Green Energy (OSTI)

The Defense Waste Processing Facility (DWPF) at the Savannah River Site vitrifies radioactive High Level Waste (HLW) for repository internment. The process consists of three major steps: waste pretreatment, vitrification, and canister decontamination/sealing. HLW consists of insoluble metal hydroxides (primarily iron, aluminum, calcium, magnesium, manganese, and uranium) and soluble sodium salts (carbonate, hydroxide, nitrite, nitrate, and sulfate). The pretreatment process in the Chemical Processing Cell (CPC) consists of two process tanks, the Sludge Receipt and Adjustment Tank (SRAT) and the Slurry Mix Evaporator (SME) as well as a melter feed tank. During SRAT processing, nitric and formic acids are added to the sludge to lower pH, destroy nitrite and carbonate ions, and reduce mercury and manganese. During the SME cycle, glass formers are added, and the batch is concentrated to the final solids target prior to vitrification. During these processes, hydrogen can be produced by catalytic decomposition of excess formic acid. The waste contains silver, palladium, rhodium, ruthenium, and mercury, but silver and palladium have been shown to be insignificant factors in catalytic hydrogen generation during the DWPF process. A full factorial experimental design was developed to ensure that the existence of statistically significant two-way interactions could be determined without confounding of the main effects with the two-way interaction effects. Rh ranged from 0.0026-0.013% and Ru ranged from 0.010-0.050% in the dried sludge solids, while initial Hg ranged from 0.5-2.5 wt%, as shown in Table 1. The nominal matrix design consisted of twelve SRAT cycles. Testing included: a three factor (Rh, Ru, and Hg) study at two levels per factor (eight runs), three duplicate midpoint runs, and one additional replicate run to assess reproducibility away from the midpoint. Midpoint testing was used to identify potential quadratic effects from the three factors. A single sludge simulant was used for all tests and was spiked with the required amount of noble metals immediately prior to performing the test. Acid addition was kept effectively constant except to compensate for variations in the starting mercury concentration. SME cycles were also performed during six of the tests.

Stone, M; Tommy Edwards, T; David Koopman, D

2009-03-03T23:59:59.000Z

14

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

15

www.mdpi.com/journal/ijerph Communication Mercury Levels in Locally Manufactured Mexican Skin-Lightening Creams  

E-Print Network (OSTI)

Abstract: Mercury is considered one of the most toxic elements for plants and animals. Nevertheless, in the Middle East, Asia and Latin America, whitening creams containing mercury are being manufactured and purchased, despite their obvious health risks. Due to the mass distribution of these products, this can be considered a global public health issue. In Mexico, these products are widely available in pharmacies, beauty aid and health stores. They are used for their skin lightening effects. The aim of this work was to analyze the mercury content in some cosmetic whitening creams using the cold vapor technique coupled with atomic absorption spectrometry (CV-AAS). A total of 16 skin-lightening creams from the local market were investigated. No warning information was noted on the packaging. In 10 of the samples, no mercury was detected. The mercury content in six of the samples varied between 878 and 36,000 ppm, despite the fact that the U.S. Food and Drug Administration (FDA) has determined that the limit for mercury in creams should be less than 1 ppm. Skin creams containing mercury are still available and commonly used in Mexico and many developing countries, and their contents are poorly controlled.

Claudia P. Peregrino; Myriam V. Moreno; Silvia V. Mir; Alma D. Rubio; Luz O. Leal

2011-01-01T23:59:59.000Z

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 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

18

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

19

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

20

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

22

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...

23

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

24

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

25

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

26

An Assessment of Mercury Emissions from U.S. Coal-Fired Power Plants  

Science Conference Proceedings (OSTI)

In parallel with a U.S. Environmental Protection Agency (EPA) study of mercury emissions from coal-fired electric utility steam generating units, EPRI has reviewed the available data and re-estimated mercury emissions. This document provides an estimate of the mercury levels entering every U.S. coal-fired power plant in 1999, the total and speciated mercury emissions during the same period, and initial projections of the effect of operational and design changes on mercury levels in 2010.

2000-10-10T23:59:59.000Z

27

Mercury contamination in fish-eating birds from a polluted watershed  

SciTech Connect

The mercury contents of selected fish-eating birds in the watershed affected by the Homestake gold mine in Lead, South Dakota are reported. The mine had used the mercury amalgamation process to recover gold, and had discharged 12 to 40 pounds of mercury per day. Elevated mercury levels were found in the birds.

Hesse, L.W.

1972-01-01T23:59:59.000Z

28

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

29

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.

30

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). ...

31

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 ). ...

32

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

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 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

37

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

38

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

39

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

40

CX-000768: Categorical Exclusion Determination | Department of...  

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

Categorical Exclusion Determination Determining the Variability of Continuous Mercury Monitors at Low Mercury Levels CX(s) Applied: B3.6 Date: 02072010 Location(s):...

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

42

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

43

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

44

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

45

Novel regenerable sorbent for mercury capture from flue gases of coal-fired power plant  

Science Conference Proceedings (OSTI)

A natural chabazite-based silver nanocomposite (AgMC) was synthesized to capture mercury from flue gases of coal-fired power plants. Silver nanoparticles were engineered on zeolite through ion-exchange of sodium ions with silver ions, followed by thermal annealing. Mercury sorption test using AgMC was performed at various temperatures by exposing it to either pulse injection of mercury or continuous mercury flow. A complete capture of mercury by AgMC was achieved up to a capture temperature of 250{sup o}C. Nano silver particles were shown to be the main active component for mercury capture by amalgamation mechanism. Compared with activated carbon-based sorbents, the sorbent prepared in this study showed a much higher mercury capture capacity and upper temperature limit for mercury capture. More importantly, the mercury captured by the spent AgMC could be easily released for safe disposal and the sorbent regenerated by simple heating at 400{sup o}C. Mercury capture tests performed in real flue gas environment showed a much higher level of mercury capture by AgMC than by other potential mercury sorbents tested. In our mercury capture tests, the AgMC exposed to real flue gases showed an increased mercury capture efficiency than the fresh AgMC. 38 refs., 6 figs.

Yan Liu; David J.A. Kelly; Hongqun Yang; Christopher C.H. Lin; Steve M. Kuznicki; Zhenghe Xu [University of Alberta, Edmonton, AB (Canada). Department of Chemical and Materials Engineering

2008-08-15T23:59:59.000Z

46

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.

47

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

48

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

49

Decreasing aqueous mercury concentrations to achieve safe levels in fish: examining the water-fish relationship in two point-source contaminated streams  

Science Conference Proceedings (OSTI)

East Fork Poplar Creek (EFPC) and White Oak Creek (WOC) are two mercury-contaminated streams located on the Department of Energy s Oak Ridge Reservation in east Tennessee. East Fork Poplar Creek is the larger and more contaminated of the two, with average aqueous mercury (Hg) concentrations exceeding those in reference streams by several hundred-fold. Remedial actions over the past 20 years have decreased aqueous Hg concentrations in EFPC by 85 %. Fish fillet concentrations, however, have not responded to this decrease in aqueous Hg and remain above the U.S. Environmental Protection Agency s ambient water quality criterion (AWQC) of 0.3 mg/kg. The lack of correlation between aqueous and fish tissue Hg concentrations in this creek has led to questions regarding the usefulness of target aqueous Hg concentrations and strategies for future remediation efforts. White Oak Creek has a similar contamination history but aqueous Hg concentrations in WOC are an order of magnitude lower than in EFPC. Despite the lower aqueous Hg concentrations, fish fillet concentrations in WOC have also been above the AWQC, making the most recent aqueous Hg target of 200 ng/L in EFPC seem unlikely to result in an effective decrease in fillet Hg concentrations. Recent monitoring efforts in WOC, however, suggest an aqueous total Hg threshold above which Hg bioaccumulation in fish may not respond. This new information could be useful in guiding remedial actions in EFPC and in other point-source contaminated streams.

Mathews, Teresa J [ORNL; Southworth, George R [ORNL; Peterson, Mark J [ORNL; Roy, W Kelly [ORNL; Ketelle, Richard H [ORNL; Valentine, Charles S [ORNL; Gregory, Scott M [ORNL

2013-01-01T23:59:59.000Z

50

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

51

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

52

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...

53

Characterizing Coal-Fired Power Plant Mercury Emissions Variability at Low Concentrations  

Science Conference Proceedings (OSTI)

This technical update presents a further evaluation of the variability of mercury emission from coal-fired power plants, based on additional measurements by continuous mercury monitors (CMMs) at two coal-fired power plants with low-level mercury emissions. Emissions variability is important for control technology selection as well as regulatory considerations.

2003-10-20T23:59:59.000Z

54

Understanding Mercury Chemistry via the Reaction Engineering International (REI) ProMerc(tm) Model  

Science Conference Proceedings (OSTI)

Mercury chemistry in a coal-fired boiler remains poorly understood. As a result, power company engineers cannot predict with confidence the level of mercury emissions they would experience at a given site if they change coals, add/enhance criteria pollutant controls, or implement mercury controls. Similarly, they cannot predict with confidence how mercury control test results at one site extrapolate to other sites. This report documents a modeling study conducted by Reaction Engineering International (RE...

2008-03-04T23:59:59.000Z

55

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

56

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

57

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

58

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...

59

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

60

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

62

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

63

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

64

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

65

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

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. 3 figures.

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

1991-06-18T23:59:59.000Z

67

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

68

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

69

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

70

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

71

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

72

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

73

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.

74

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

75

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

76

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.

77

Level  

E-Print Network (OSTI)

7 at level 3 (FHEQ level 6) and the rest at level M (FHEQ level 7) 4. Other entry N/A Credit Level awards (if applicable): 5. Exit Awards: PGDip Advanced Computer Science 120 credits with not more than 30 credits at level 3 (FHEQ level 6) and the rest at level M (FHEQ level 7) Credit

Programme Csad

2007-01-01T23:59:59.000Z

78

Level  

E-Print Network (OSTI)

7 at level 3 (FHEQ level 6) and the rest at level M (FHEQ level 7) 4. Other entry N/A Credit Level awards (if applicable): 5. Exit Awards: PGDip Computer Science 120 credits with not more than 30 credits at level 3 (FHEQ level 6) and the rest at level M (FHEQ level 7) Credit

unknown authors

2006-01-01T23:59:59.000Z

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 "mercury levels cxs" 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

NETL: Mercury Emissions Control Technologies - Low-Cost Options for  

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

Low-Cost Options for Moderate Levels of Mercury Control Low-Cost Options for Moderate Levels of Mercury Control ADA- Environmental Solutions will test two new technologies for mercury control. The TOXECON II(tm) technology injects activated carbon directly into the downstream collecting fields of an electrostatic precipitator. The benefit of this technology is that the majority of the fly ash is collected in the upstream collecting fields which results in only a small portion of carbon-contaminated ash. Additionally, the TOXECON II(tm) technology requires minimal capital investment as only minor retrofits to the electrostatic precipitator are needed. The second technology is injection of novel sorbents for mercury removal on units with hot-side electrostatic precipitators (ESPs). Mercury removal from hot-side electrostatic precipitators is difficult as their high operating temperature range keeps the mercury in the vapor phase and prevents the mercury from adsorbing onto sorbents. The TOXECON II(tm) technology will be tested at Entergy's Independence Station which burns PRB coal. The novel sorbents for hot-side ESPs technology will be tested at MidAmerican's Council Bluffs Energy Center and MidAmerican's Louisa Station, both of which burn PRB coal. Additional project partners include EPRI, MidAmerican, Entergy, Alliant, ATCO Power, DTE Energy, Oglethorpe Power, Norit Americas Inc., Xcel Energy, Southern Company, Arch Coal, and EPCOR.

82

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

83

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

84

Mercury emissions from a simulated in-situ oil shale retort  

DOE Green Energy (OSTI)

In simulated in-situ retorting, lesser amounts of mercury are distributed to the spent shale, shale oil, and water than to the offgas. The mercury release is controlled by the successive volatilization and removal of mercury as the reaction front progresses down the shale bed. Oil-wet shale, enriched in heavy ends, may selectively remove the mercury from the gaseous phase. If nonuniform gas flow occurs in commercial retorts, mercury may be condensed in cool regions of the shale bed behind the reaction front where it may be subsequently leached by groundwaters. In a 50,000 bpd or larger commercial operation, it is likely that mercury will have to be removed from the gas stream to meet air quality standards or emission standards. Existing control technologies under consideration for oil shale plants need to be evaluated to determine their mercury removal efficiency. Mercury levels in retort waters would exceed water quality standards and criteria for discharge to local streams and mercury would have to be removed from these waters before discharge. Additional work is required to determine the fate and form of the mercury in a stack plume and the effect of the oil-wet zone on the removal of mercury from the gas phase. 5 figures, 9 tables.

Fox, J.P.; Duvall, J.J.; Mason, K.K.; McLaughlin, R.D.; Bartke, T.C.; Poulson, R.E.

1978-07-01T23:59:59.000Z

85

NETL: Mercury Emissions Control Technologies - Oxidation of Mercury Across  

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

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]

86

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

87

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

88

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

89

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

90

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

91

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

92

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

93

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

94

Gas Mileage of 1986 Vehicles by Mercury  

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

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

95

Gas Mileage of 1991 Vehicles by Mercury  

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

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

96

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

97

Mercury contamination in non-fish-eating birds from a polluted watershed  

SciTech Connect

Mercury levels in birds collected along the mercury-contaminated Cheyenne river system in South Dakota were analyzed. The study dealt with small birds which feed mainly on insects, aquatic insect larvae and seeds. The levels found are not lethal, but may be hindering reproduction.

Brown, R.L.

1972-01-01T23:59:59.000Z

98

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

99

Mercury control challenge for industrial boiler MACT affected facilities  

SciTech Connect

An industrial coal-fired boiler facility conducted a test program to evaluate the effectiveness of sorbent injection on mercury removal ahead of a fabric filter with an inlet flue gas temperature of 375{sup o}F. The results of the sorbent injection testing are essentially inconclusive relative to providing the facility with enough data upon which to base the design and implementation of permanent sorbent injection system(s). The mercury removal performance of the sorbents was significantly less than expected. The data suggests that 50 percent mercury removal across a baghouse with flue gas temperatures at or above 375{sup o}F and containing moderate levels of SO{sub 3} may be very difficult to achieve with activated carbon sorbent injection alone. The challenge many coal-fired industrial facilities may face is the implementation of additional measures beyond sorbent injection to achieve high levels of mercury removal that will likely be required by the upcoming new Industrial Boiler MACT rule. To counter the negative effects of high flue gas temperature on mercury removal with sorbents, it may be necessary to retrofit additional boiler heat transfer surface or spray cooling of the flue gas upstream of the baghouse. Furthermore, to counter the negative effect of moderate or high SO{sub 3} levels in the flue gas on mercury removal, it may be necessary to also inject sorbents, such as trona or hydrated lime, to reduce the SO{sub 3} concentrations in the flue gas. 2 refs., 1 tab.

NONE

2009-09-15T23:59:59.000Z

100

Sources of Mercury to East Fork Poplar Creek Downstream from the Y-12 National Security Complex: Inventories and Export Rates  

SciTech Connect

East Fork Poplar Creek (EFPC) in Oak Ridge, Tennessee, has been heavily contaminated with mercury (also referred to as Hg) since the 1950s as a result of historical activities at the U.S. Department of Energy (DOE) Y-12 National Security Complex (formerly the Oak Ridge Y-12 Plant and hereinafter referred to as Y-12). During the period from 1950 to 1963, spills and leaks of elemental mercury (Hg{sup 0}) contaminated soil, building foundations, and subsurface drainage pathways at the site, while intentional discharges of mercury-laden wastewater added 100 metric tons of mercury directly to the creek (Turner and Southworth 1999). The inventory of mercury estimated to be lost to soil and rock within the facility was 194 metric tons, with another estimated 70 metric tons deposited in floodplain soils along the 25 km length of EFPC (Turner and Southworth 1999). Remedial actions within the facility reduced mercury concentrations in EFPC water at the Y-12 boundary from > 2500 ng/L to about 600 ng/L by 1999 (Southworth et al. 2000). Further actions have reduced average total mercury concentration at that site to {approx}300 ng/L (2009 RER). Additional source control measures planned for future implementation within the facility include sediment/soil removal, storm drain relining, and restriction of rainfall infiltration within mercury-contaminated areas. Recent plans to demolish contaminated buildings within the former mercury-use areas provide an opportunity to reconstruct the storm drain system to prevent the entry of mercury-contaminated water into the flow of EFPC. Such actions have the potential to reduce mercury inputs from the industrial complex by perhaps as much as another 80%. The transformation and bioaccumulation of mercury in the EFPC ecosystem has been a perplexing subject since intensive investigation of the issue began in the mid 1980s. Although EFPC was highly contaminated with mercury (waterborne mercury exceeded background levels by 1000-fold, mercury in sediments by more than 2000-fold) in the 1980s, mercury concentrations in EFPC fish exceeded those in fish from regional reference sites by only a little more than 10-fold. This apparent low bioavailability of mercury in EFPC, coupled with a downstream pattern of mercury in fish in which mercury decreased in proportion to dilution of the upstream source, lead to the assumption that mercury in fish would respond to decreased inputs of dissolved mercury to the stream's headwaters. However, during the past two decades when mercury inputs were decreasing, mercury concentrations in fish in Lower EFPC (LEFPC) downstream of Y-12 increased while those in Upper EFPC (UEFPC) decreased. The key assumption of the ongoing cleanup efforts, and concentration goal for waterborne mercury were both called into question by the long-term monitoring data. The large inventory of mercury within the watershed downstream presents a concern that the successful treatment of sources in the headwaters may not be sufficient to reduce mercury bioaccumulation within the system to desired levels. The relative importance of headwater versus floodplain mercury sources in contributing to mercury bioaccumulation in EFPC is unknown. A mercury transport study conducted by the Tennessee Valley Authority (TVA) in 1984 estimated that floodplain sources contributed about 80% of the total annual mercury export from the EFPC system (ORTF 1985). Most of the floodplain inputs were associated with wet weather, high flow events, while much of the headwater flux occurred under baseflow conditions. Thus, day-to-day exposure of biota to waterborne mercury was assumed to be primarily determined by the Y-12 source. The objective of this study was to evaluate the results of recent studies and monitoring within the EFPC drainage with a focus on discerning the magnitude of floodplain mercury sources and how long these sources might continue to contaminate the system after headwater sources are eliminated or greatly reduced.

Southworth, George R [ORNL; Greeley Jr, Mark Stephen [ORNL; Peterson, Mark J [ORNL; Lowe, Kenneth Alan [ORNL; Ketelle, Richard H [ORNL; Floyd, Stephanie B [ORNL

2010-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "mercury levels cxs" 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

Sources of Mercury to East Fork Poplar Creek Downstream from the Y-12 National Security Complex: Inventories and Export Rates  

SciTech Connect

East Fork Poplar Creek (EFPC) in Oak Ridge, Tennessee, has been heavily contaminated with mercury (also referred to as Hg) since the 1950s as a result of historical activities at the U.S. Department of Energy (DOE) Y-12 National Security Complex (formerly the Oak Ridge Y-12 Plant and hereinafter referred to as Y-12). During the period from 1950 to 1963, spills and leaks of elemental mercury (Hg{sup 0}) contaminated soil, building foundations, and subsurface drainage pathways at the site, while intentional discharges of mercury-laden wastewater added 100 metric tons of mercury directly to the creek (Turner and Southworth 1999). The inventory of mercury estimated to be lost to soil and rock within the facility was 194 metric tons, with another estimated 70 metric tons deposited in floodplain soils along the 25 km length of EFPC (Turner and Southworth 1999). Remedial actions within the facility reduced mercury concentrations in EFPC water at the Y-12 boundary from > 2500 ng/L to about 600 ng/L by 1999 (Southworth et al. 2000). Further actions have reduced average total mercury concentration at that site to {approx}300 ng/L (2009 RER). Additional source control measures planned for future implementation within the facility include sediment/soil removal, storm drain relining, and restriction of rainfall infiltration within mercury-contaminated areas. Recent plans to demolish contaminated buildings within the former mercury-use areas provide an opportunity to reconstruct the storm drain system to prevent the entry of mercury-contaminated water into the flow of EFPC. Such actions have the potential to reduce mercury inputs from the industrial complex by perhaps as much as another 80%. The transformation and bioaccumulation of mercury in the EFPC ecosystem has been a perplexing subject since intensive investigation of the issue began in the mid 1980s. Although EFPC was highly contaminated with mercury (waterborne mercury exceeded background levels by 1000-fold, mercury in sediments by more than 2000-fold) in the 1980s, mercury concentrations in EFPC fish exceeded those in fish from regional reference sites by only a little more than 10-fold. This apparent low bioavailability of mercury in EFPC, coupled with a downstream pattern of mercury in fish in which mercury decreased in proportion to dilution of the upstream source, lead to the assumption that mercury in fish would respond to decreased inputs of dissolved mercury to the stream's headwaters. However, during the past two decades when mercury inputs were decreasing, mercury concentrations in fish in Lower EFPC (LEFPC) downstream of Y-12 increased while those in Upper EFPC (UEFPC) decreased. The key assumption of the ongoing cleanup efforts, and concentration goal for waterborne mercury were both called into question by the long-term monitoring data. The large inventory of mercury within the watershed downstream presents a concern that the successful treatment of sources in the headwaters may not be sufficient to reduce mercury bioaccumulation within the system to desired levels. The relative importance of headwater versus floodplain mercury sources in contributing to mercury bioaccumulation in EFPC is unknown. A mercury transport study conducted by the Tennessee Valley Authority (TVA) in 1984 estimated that floodplain sources contributed about 80% of the total annual mercury export from the EFPC system (ORTF 1985). Most of the floodplain inputs were associated with wet weather, high flow events, while much of the headwater flux occurred under baseflow conditions. Thus, day-to-day exposure of biota to waterborne mercury was assumed to be primarily determined by the Y-12 source. The objective of this study was to evaluate the results of recent studies and monitoring within the EFPC drainage with a focus on discerning the magnitude of floodplain mercury sources and how long these sources might continue to contaminate the system after headwater sources are eliminated or greatly reduced.

Southworth, George R [ORNL; Greeley Jr, Mark Stephen [ORNL; Peterson, Mark J [ORNL; Lowe, Kenneth Alan [ORNL; Ketelle, Richard H [ORNL; Floyd, Stephanie B [ORNL

2010-02-01T23:59:59.000Z

102

Level  

E-Print Network (OSTI)

7 180 credits with not more than 30 credits at level 3 (FHEQ level 6) and the rest at level M (FHEQ level 7) 4. Other entry N/A Credit Level awards (if applicable): 5. Exit Awards: PGDip in Advanced Computer Science with

Programme Csci

2010-01-01T23:59:59.000Z

103

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

104

Total and organic mercury in marine fish of the upper gulf of Thailand  

SciTech Connect

In 1975, the total mercury contents in fish of the gulf of Thailand reportedly ranged from 0 to 0.58 ppM. In a recent study, traces of total mercury were found in the marine food chain, which tend to increase at higher trophic levels and according to the animal's size. As Thailand is one of the countries where the nationwide fish consumption is comparatively high, further study on the contamination of organic mercury in fish is essential.

Cheevaparanapivat, V.; Menasveta, P.

1979-10-01T23:59:59.000Z

105

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

106

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

107

Gas Mileage of 1987 Vehicles by Mercury  

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

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

108

Gas Mileage of 1990 Vehicles by Mercury  

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

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

109

Gas Mileage of 1999 Vehicles by Mercury  

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

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...

110

Gas Mileage of 1984 Vehicles by Mercury  

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

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...

111

Gas Mileage of 1988 Vehicles by Mercury  

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

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...

112

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...

113

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...

114

Gas Mileage of 2007 Vehicles by Mercury  

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

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...

115

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

116

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

117

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

118

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

119

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

120

NETL: Mercury Emissions Control Technologies - Evaluation of Sorbent  

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

Evaluation of Sorbent Injection for Mercury Control Evaluation of Sorbent Injection for Mercury Control ADA Environmental Solutions will evaluate injection of activated carbon and other sorbents to remove mercury for a variety of coal and air pollution control equipment configurations. The scope of work is for 36 months and intended to gather operating data that will document actual performance levels and accurate cost information to assess the costs of controlling mercury from coal fired utilities. Testing will be conducted at four different host sites that represent a significant percentage of unit configurations. The subsequent cost analyses will include capital costs, by-product utilization issues, sorbent usage, any necessary enhancements, such as SO3 control or flue gas conditioning, balance of plant, manpower requirements and waste issues. The host sites are Sunflower Electric's Holcomb Station, Ontario Power Generation's Nanticoke Station, AmerenUE's Meramec Station and American Electric Power's (AEP) Conesville Station.

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

122

US Food and Drug Administration survey of methyl mercury in canned tuna  

SciTech Connect

Methyl mercury was determined by the US Food and Drug Administration (FDA) in 220 samples of canned tuna collected in 1991. Samples were chosen to represent different styles, colors, and packs as available. Emphasis was placed on water-packed tuna, small can size, and the highest-volume brand names. The average methyl mercury (expressed as Hg) found for the 220 samples was 0.17 ppm; the range was <0.10-0.75 ppm. Statistically, a significantly higher level of methyl mercury was found in solid white and chunk tuna. Methyl mercury level was not related to can size. None of the 220 samples had methyl mercury levels that exceeded the 1 ppm FDA action level. 11 refs., 1 tab.

Yess, J. [Food and Drug Administration, Washington, DC (United States)

1993-01-01T23:59:59.000Z

123

Field Testing of Activated Carbon Injection Options for Mercury Control at TXU's Big Brown Station  

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

Field TesTing oF AcTivATed cArbon Field TesTing oF AcTivATed cArbon injecTion opTions For Mercury conTrol AT TXu's big brown sTATion Background The 2005 Clean Air Mercury Rule will require significant reductions in mercury emissions from coal-fired power plants. Lignite coal is unique because of its highly variable ash content (rich in alkali and alkaline-earth elements), high moisture levels, low chlorine content, and high calcium content. Unique to Texas lignite coals are relatively high iron and selenium concentrations. When combusting Texas lignite coals, up to 80 percent of the mercury in the flue gas is present as elemental mercury, which is not readily captured by downstream pollution control devices. To better understand the factors that influence mercury control at units firing

124

Packaging a liquid metal ESD with micro-scale Mercury droplet.  

SciTech Connect

A liquid metal ESD is being developed to provide electrical switching at different acceleration levels. The metal will act as both proof mass and electric contact. Mercury is chosen to comply with operation parameters. There are many challenges surrounding the deposition and containment of micro scale mercury droplets. Novel methods of micro liquid transfer are developed to deliver controllable amounts of mercury to the appropriate channels in volumes under 1 uL. Issues of hermetic sealing and avoidance of mercury contamination are also addressed.

Barnard, Casey Anderson

2011-08-01T23:59:59.000Z

125

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

126

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

127

NETL: Environmental Research - Fate of Mercury in Synthetic Gypsum Used for  

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

Fate of Mercury in Synthetic Gypsum Used for Wallboard Production Fate of Mercury in Synthetic Gypsum Used for Wallboard Production This project will provide information about the fate of mercury in synthetic gypsum produced by wet FGD systems on coal-fired power plants, when used as feedstock for wallboard production. Wet FGD systems play a key role in current and future efforts to limit the air emissions of mercury control from coal-fired plants. Potential emissions of mercury from FGD byproduct gypsum during wallboard production could limit overall mercury control levels achieved by the coal power industry. Furthermore, any adverse effects of elevated mercury levels in wallboard products could undermine the use of FGD gypsum as a feedstock for wallboard plants. Under a Cooperative Agreement with DOE-NETL, USG Corp., a major producer of wallboard, will provide high-quality data on the extent and location of mercury release during the wallboard production process, and provide additional information on the potential for mercury leaching at the end of the wallboard life cycle, when it is disposed in municipal landfills.

128

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

129

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

130

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

131

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

132

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

133

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

134

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

135

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

136

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

137

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

138

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

139

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

140

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

142

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

143

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

144

NETL: Mercury Emissions Control Technologies - Demonstration of Mer-Cure  

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

Demonstration of Mer-Cure Technology for Enhanced Mercury Control Demonstration of Mer-Cure Technology for Enhanced Mercury Control ALSTOM Power, Inc. – U.S. Power Plant Laboratories (ALSTOM-PPL) proposes herein a consortium-based program to demonstrate ALSTOM-PPL's Mer-Cure™ technology – a novel, sorbent-based (Mer-Clean™ ) mercury control technology in coal-fired boilers. The program objective is (i) to demonstrate at a full scale greater than 90% mercury capture based on baseline mercury level (ii) at a cost significantly less than 50% of the $60,000/lb of mercury removed. The proposed full-scale demonstration program is to perform two- to six-month test campaigns in three independent host sites with various boiler configurations over a two-year period. The demonstration program will include a two- to four-week short-term field test followed by two- to six-month long-term demonstration for each of the three selected sites.

145

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

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

Risk Assessment of Reduced Mercury Emissions From Coal-Fired Power Plants Risk Assessment of Reduced Mercury Emissions From Coal-Fired Power Plants Given that mercury emissions from coal power plants will almost certainly be limited by some form of national regulation or legislation, Brookhaven National Laboratory (BNL) is performing an assessment of the reduction in human health risk that may be achieved through reduction in coal plant emissions 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 assessment focuses on consumption of fish by women of child-bearing age. Preliminary Risk Assessment A preliminary risk assessment was conducted using a simplified approach based on three major topics: Hg emissions and deposition (emphasizing coal plants), Hg consumption through fish, and dose-response functions for Hg. Using information available from recent literature, dose response factors (DRFs) were generated from studies on loss of cognitive abilities (language skills, motor skills, etc.) by young children whose mothers consumed large amounts of fish with high Hg levels. Population risks were estimated for the general population in three regions of the country, (the Midwest, Northeast, and Southeast) that were identified by EPA as being heavily impacted by coal emissions.

146

The corticosterone stress response and mercury contamination in free-living tree swallows, Tachycineta bicolor  

E-Print Network (OSTI)

, or with baseline corticosterone in Maine sites where mercury levels were lower. The findings suggest blood and egg from Hg usage in industrial applications such as chlor-alkali plants and atmospheric deposition from the generation of electrical power mainly through coal burning. Mercury is found in aquatic environments

Reed, Michael

147

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.

148

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]

149

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

150

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).

151

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

152

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

153

Recovery and removal of mercury from mixed wastes. Final report, September 1994--June 1995  

SciTech Connect

In recognition of the major environmental problem created by mercury contamination of wastes and soils at an estimated 200,000 sites along US natural gas and oil pipelines and at a number of government facilities, including Oak Ridge, Savannah River, Hanford, and Rocky Flats, the US Department of Energy (DOE) is seeking an effective and economical process for removing mercury from various DOE waste streams in order to allow the base waste streams to be treated by means of conventional technologies. In response to the need for Unproved mercury decontamination technology, Mercury Recovery Services (MRS) has developed and commercialized a thermal treatment process for the recovery of mercury from contaminated soils and industrial wastes. The objectives of this program were to: demonstrate the technical and economic feasibility of the MRS process to successfully remove and recover mercury from low-level mixed waste containing mercury compounds (HgO, HgS, HgCl{sub 2}) and selected heavy metal compounds (PbO, CdO); determine optimum processing conditions required to consistently reduce the residual total mercury content to 1 mg/kg while rendering the treated product nontoxic as determined by TCLP methods; and provide an accurate estimate of the capital and operating costs for a commercial processing facility designed specifically to remove and recovery mercury from various waste streams of interest at DOE facilities. These objectives were achieved in a four-stage demonstration program described within with results.

Sutton, W.F.; Weyand, T.E.; Koshinski, C.J.

1995-06-01T23:59:59.000Z

154

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

155

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

156

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

157

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...

158

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

159

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

160

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

DOE/NETL's phase II mercury control technology field testing program: preliminary economic analysis of activated carbon injection  

Science Conference Proceedings (OSTI)

Based on results of field testing conducted by the U.S. Department of Energy's National Energy Technology Laboratory (DOE/NETL), this article provides preliminary costs for mercury control via conventional activated carbon injection (ACI), brominated ACI, and conventional ACI coupled with the application of a sorbent enhancement additive (SEA) to coal prior to combustion. The economic analyses are reported on a plant-specific basis in terms of the cost required to achieve low (50%), mid (70%), and high (90%) levels of mercury removal 'above and beyond' the baseline mercury removal achieved by existing emission control equipment. In other words, the levels of mercury control are directly attributable to ACI. Mercury control costs via ACI have been amortized on a current dollar basis. Using a 20-year book life, levelized costs for the incremental increase in cost of electricity (COE), expressed in mills per kilowatt-hour (mills/kWh), and the incremental cost of mercury control, expressed in dollars per pound of mercury removed ($/lb Hg removed), have been calculated for each level of ACI mercury control. For this analysis, the increase in COE varied from 0.14 mills/kWh to 3.92 mills/kWh. Meanwhile, the incremental cost of mercury control ranged from $3810/lb Hg removed to $166 000/lb Hg removed. 13 refs., 4 figs., 3 tabs.

Andrew P. Jones; Jeffrey W. Hoffmann; Dennis N. Smith; Thomas J. Feeley III; James T. Murphy [National Energy Technology Laboratory, Pittsburgh, PA (United States)

2007-02-15T23:59:59.000Z

162

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.

163

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

164

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

165

"Seeing" Mercury Methylation in Progress  

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

Mercury in the environment can easily reach toxic levels. In a process called methylation, Hg is transformed into a form that can be accumulated in the muscle and fatty tissue of fish. Accumulated levels of methylmercury become higher as the fish grow, and levels are magnified up the food web as larger fish eat smaller fish, a process called biomagnification. As a result, mercury concentrations in fish can be millions of times higher than in surrounding waters [1]. Fish advisories have been set to limit consumption of certain fish higher up on the food web, especially for pregnant women and small children (see Figure 1). Mercury in the environment can easily reach toxic levels. In a process called methylation, Hg is transformed into a form that can be accumulated in the muscle and fatty tissue of fish. Accumulated levels of methylmercury become higher as the fish grow, and levels are magnified up the food web as larger fish eat smaller fish, a process called biomagnification. As a result, mercury concentrations in fish can be millions of times higher than in surrounding waters [1]. Fish advisories have been set to limit consumption of certain fish higher up on the food web, especially for pregnant women and small children (see Figure 1). figure 1 Figure 1. Mercury health risks Health advisory from the CALFED Science Program to limit consumption of fish, in order to avoid excessive accumulation of Hg. Methylated Hg is biomagnified up the food chain, attaining high levels in some types of sportfish. http://science.calwater.ca.gov/images/scinews_hg_da_lg.jpg

166

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

167

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

168

Spatial assessment of net mercury emissions from the use of fluorescent bulbs  

SciTech Connect

While fluorescent lighting is an important technology for reducing electrical energy demand, mercury used in the bulbs is an ongoing concern. Using state and country level data, net emissions of mercury from the marginal use of fluorescent lightbulbs are examined for a base year of 2004 for each of the 50 United States and 130 countries. Combustion of coal for electric power generation is generally the largest source of atmospheric mercury pollution; reduction in electricity demand from the substitution of incandescent bulbs with fluorescents leads to reduced mercury emissions during the use of the bulb. This analysis considers the local mix of power sources, coal quality, thermal conversion efficiencies, distribution losses, and any mercury control technologies that might be in place. Emissions of mercury from production and end-of-life treatment of the bulbs are also considered, providing a life-cycle perspective. Net reductions in mercury over the entire life cycle range from -1.2 to 97 mg per bulb depending on the country. The consequences for atmospheric mercury emissions of several policy scenarios are also discussed. 46 refs., 4 figs., 3 tabs.

Matthew J. Eckelman; Paul T. Anastas; Julie B. Zimmerman [Yale University, New Haven, CT (United States). Department of Chemical Engineering

2008-11-15T23:59:59.000Z

169

SULFUR POLYMER STABILIZATION/SOLIDIFICATION (SPSS) TREATABILITY OF LOS ALAMOS NATIONAL LABORATORY MERCURY WASTE.  

Science Conference Proceedings (OSTI)

Brookhaven National Laboratory's Sulfur Polymer Stabilization/Solidification (SPSS) process was used to treat approximately 90kg of elemental mercury mixed waste from Los Alamos National Laboratory. Treatment was carried out in a series of eight batches using a 1 ft{sup 3} pilot-scale mixer, where mercury loading in each batch was 33.3 weight percent. Although leach performance is currently not regulated for amalgamated elemental mercury (Hg) mixed waste, Toxicity Characteristic Leach Procedure (TCLP) testing of SPSS treated elemental mercury waste indicates that leachability is readily reduced to below the TCLP limit of 200 ppb (regulatory requirement following treatment by retort for wastes containing > 260 ppb Hg), and with process optimization, to levels less than the stringent Universal Treatment Standard (UTS) limit of 25 ppb that is applied to waste containing < 260 ppm Hg. In addition, mercury-contaminated debris, consisting of primary glass and plastic containers, as well as assorted mercury thermometers, switches, and labware, was first reacted with SPSS components to stabilize the mercury contamination, then macroencapsulated in the molten SPSS product. This treatment was done by vigorous agitation of the sulfur polymer powder and the comminuted debris. Larger plastic and metal containers were reacted to stabilize internal mercury contamination, and then filled with molten sulfur polymer to encapsulate the treated product.

ADAMS,J.W.; KALB,P.D.

2001-11-01T23:59:59.000Z

170

Quantification of the Mercury Adsorption Mechanism on Brominated Activated  

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

Quantification of the Mercury Adsorption Mechanism on Brominated Activated Quantification of the Mercury Adsorption Mechanism on Brominated Activated Carbon Saturday, August 31, 2013 The primary anthropogenic source of mercury (Hg) emissions into the atmosphere is coal-fired power utilities. This work explores materials designed for Hg capture to be applied in the ductwork of a power plant to prevent Hg release into the atmosphere. Bench-scale combustion experiments have been carried out, in which sorbent materials were placed in a simulated flue gas stream doped with ppb levels of Hg. The sorbent surfaces were probed using x-ray absorption spectroscopy to determine the mechanism of Hg binding and to ultimately improve solvent design. The spectroscopy data was analyzed alongside results from density functional theory (DFT) for benchmarking so that DFT can be used as a screening tool for material

171

MERCURY EMISSIONS FROM A SIMULATED IN-SITU OIL SHALE RETORT  

E-Print Network (OSTI)

measured mercury levels in shale gases and waters. The TLV'srecovery shale Spent shale gas (wet) CS~35 cs~s6 CS-57 CS-59on large areas of the shale bed if gas channeling and

Fox, J. P.

2012-01-01T23:59:59.000Z

172

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

173

Effects of Chlorine and Other Flue Gas Parameters on SCR Catalyst Mercury Oxidation and Capture Efficiencies  

Science Conference Proceedings (OSTI)

Although catalyst behavior is relatively well understood with respect to deNOx and SO2 oxidation, relatively little is known about mercury oxidation behavior. This test program seeks to evaluate the mercury oxidation performance of multiple types of Selective Catalytic Reduction (SCR) catalyst as a function of changes in various flue gas parameters, including chlorine level, ammonia level, flow rate, and temperature. This interim report describes the results from parametric testing on the first catalyst.

2008-08-27T23:59:59.000Z

174

Evaluation of Mercury Emissions from Coal-Fired Facilities with SCR and FGD Systems  

Science Conference Proceedings (OSTI)

CONSOL Energy Inc., Research & Development (CONSOL), with support from the U.S. Department of Energy, National Energy Technology Laboratory (DOE) and the Electric Power Research Institute (EPRI), is evaluating the effects of selective catalytic reduction (SCR) on mercury (Hg) capture in coal-fired plants equipped with an electrostatic precipitator (ESP)--wet flue gas desulfurization (FGD) combination or a spray dyer absorber--fabric filter (SDA-FF) combination. In this program CONSOL is determining mercury speciation and removal at 10 coal-fired facilities. The principal purpose of this work is to develop a better understanding of the potential mercury removal ''co-benefits'' achieved by NO{sub x}, and SO{sub 2} control technologies. It is expected that these data will provide the basis for fundamental scientific insights into the nature of mercury chemistry in flue gas, the catalytic effect of SCR systems on mercury speciation and the efficacy of different FGD technologies for mercury capture. Ultimately, this insight could help to design and operate SCR and FGD systems to maximize mercury removal. The objectives are (1) to evaluate the effect of SCR on mercury capture in the ESP-FGD and SDA-FF combinations at coal-fired power plants, (2) evaluate the effect of SCR catalyst degradation on mercury capture; (3) evaluate the effect of low load operation on mercury capture in an SCR-FGD system, and (4) collect data that could provide the basis for fundamental scientific insights into the nature of mercury chemistry in flue gas, the catalytic effect of SCR systems on mercury speciation and the efficacy of different FGD technologies for mercury capture. This document, the ninth in a series of topical reports, describes the results and analysis of mercury sampling performed on Unit 1 at Plant 7, a 566 MW unit burning a bituminous coal containing 3.6% sulfur. The unit is equipped with a SCR, ESP, and wet FGD to control NO{sub x}, particulate, and SO{sub 2} emissions, respectively. Four sampling tests were performed in August 2004 during ozone season with the SCR operating; flue gas mercury speciation and concentrations were determined at the SCR inlet, SCR outlet, air heater outlet (ESP inlet), ESP outlet (FGD inlet), and at the stack (FGD outlet) using the Ontario Hydro method. Three sampling tests were also performed in November 2004 during non-ozone season with the SCR bypassed; flue gas mercury speciation and concentrations were determined at the ESP outlet (FGD inlet), and at the stack (FGD outlet). Process samples for material balances were collected during the flue gas measurements. The results show that, at the point where the flue gas enters the FGD, a greater percentage of the mercury was in the oxidized form when the SCR was operating compared to when the SCR was bypassed (97% vs 91%). This higher level of oxidation resulted in higher mercury removals in the FGD because the FGD removed 90-94% of the oxidized mercury in both cases. Total coal-to-stack mercury removal was 86% with the SCR operating, and 73% with the SCR bypassed. The average mercury mass balance closure was 81% during the ozone season tests and 87% during the non-ozone season tests.

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

2006-01-31T23:59:59.000Z

175

ALTERNATIVE FIELD METHODS TO TREAT MERCURY IN SOIL  

Science Conference Proceedings (OSTI)

The Department of Energy (DOE) currently has mercury (Hg) contaminated materials and soils at the various sites. Figure 1-1 (from http://www.ct.ornl.gov/stcg.hg/) shows the estimated distribution of mercury contaminated waste at the various DOE sites. Oak Ridge and Idaho sites have the largest deposits of contaminated materials. The majorities of these contaminated materials are soils, sludges, debris, and waste waters. This project concerns treatment of mercury contaminated soils. The technology is applicable to many DOE sites, in-particular, the Y-12 National Security Complex in Oak Ridge Tennessee and Idaho National Engineering and Environmental Laboratory (INEEL). These sites have the majority of the soils and sediments contaminated with mercury. The soils may also be contaminated with other hazardous metals and radionuclides. At the Y12 plant, the baseline treatment method for mercury contaminated soil is low temperature thermal desorption (LTTD), followed by on-site landfill disposal. LTTD is relatively expensive (estimated cost of treatment which exclude disposal cost for the collect mercury is greater than $740/per cubic yard [cy] at Y-12), does not treat any of the metal or radionuclides. DOE is seeking a less costly alternative to the baseline technology. As described in the solicitation (DE-RA-01NT41030), this project initially focused on evaluating cost-effective in-situ alternatives to stabilize or remove the mercury (Hg) contamination from high-clay content soil. It was believed that ex-situ treatment of soil contaminated with significant quantities of free-liquid mercury might pose challenges during excavation and handling. Such challenges may include controlling potential mercury vapors and containing liquid mercury beads. As described below, the focus of this project was expanded to include consideration of ex-situ treatment after award of the contract to International Technology Corporation (IT). After award of the contract, IT became part of Shaw E&I. The company will be denoted as ''IT'' for the rest of the document since the original contract was awarded to IT. This report details IT, Knoxville, TN and its subcontractor Nuclear Fuels Services (NFS) study to investigate alternative mercury treatment technology. The IT/NFS team demonstrated two processes for the amalgamation/stabilization/fixation of mercury and potentially Resource Conservation Recovery Act (RCRA) and radionuclide-contaminated soils. This project was to identify and demonstrate remedial methods to clean up mercury-contaminated soil using established treatment chemistries on soil from the Oak Ridge Reservation, Y-12 National Security Complex, the off-site David Witherspoon properties, and/or other similarly contaminated sites. Soil from the basement of Y-12 Plant Alpha 2 Building at the Oak Ridge Reservation was received at IT and NFS on December 20, 2001. Soils from the other locations were not investigated. The soil had background levels of radioactivity and had all eight RCRA metals well below the Toxicity Characteristic (TC) criteria. This project addresses the new DOE Environmental Management Thrust 2 ''Alternative Approaches to Current High Risk/High Cost Baselines''. Successful completion of this project will provide a step-change in DOE's treatment ability.

Ernie F. Stine

2002-08-14T23:59:59.000Z

176

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

177

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

178

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...

179

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...

180

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...

Note: This page contains sample records for the topic "mercury levels cxs" 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

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...

182

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...

183

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...

184

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...

185

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

186

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

187

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

188

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

189

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

190

Evaluation of Mercury Emissions from Coal-Fired Facilities with SCR and FGD Systems  

Science Conference Proceedings (OSTI)

CONSOL Energy Inc., Research & Development (CONSOL), with support from the U.S. Department of Energy, National Energy Technology Laboratory (DOE) and the Electric Power Research Institute (EPRI), is evaluating the effects of selective catalytic reduction (SCR) on mercury (Hg) capture in coal-fired plants equipped with an electrostatic precipitator (ESP)--wet flue gas desulfurization (FGD) combination or a spray dyer absorber--fabric filter (SDA-FF) combination. In this program CONSOL is determining mercury speciation and removal at 10 coal-fired facilities. The principal purpose of this work is to develop a better understanding of the potential mercury removal ''co-benefits'' achieved by NO{sub x}, and SO{sub 2} control technologies. It is expected that this data will provide the basis for fundamental scientific insights into the nature of mercury chemistry in flue gas, the catalytic effect of SCR systems on mercury speciation and the efficacy of different FGD technologies for mercury capture. Ultimately, this insight could help to design and operate SCR and FGD systems to maximize mercury removal. The objectives are (1) to evaluate the effect of SCR on mercury capture in the ESP-FGD and SDA-FF combinations at coal-fired power plants, (2) evaluate the effect of SCR catalyst degradation on mercury capture; (3) evaluate the effect of low load operation on mercury capture in an SCR-FGD system, and (4) collect data that could provide the basis for fundamental scientific insights into the nature of mercury chemistry in flue gas, the catalytic effect of SCR systems on mercury speciation and the efficacy of different FGD technologies for mercury capture. This document, the tenth in a series of topical reports, describes the results and analysis of mercury sampling performed on two 468 MW units burning bituminous coal containing 1.3-1.7% sulfur. Unit 2 is equipped with an SCR, ESP, and wet FGD to control NO{sub x}, particulate, and SO{sub 2} emissions, respectively. Unit 1 is similar to Unit 2, except that Unit 1 has no SCR for NOx control. Four sampling tests were performed on both units in January 2005; flue gas mercury speciation and concentrations were determined at the economizer outlet, air heater outlet (ESP inlet), ESP outlet (FGD inlet), and at the stack (FGD outlet) using the Ontario Hydro method. Process samples for material balances were collected with the flue gas measurements. The results show that the SCR increased the oxidation of the mercury at the air heater outlet. At the exit of the air heater, a greater percentage of the mercury was in the oxidized and particulate forms on the unit equipped with an SCR compared to the unit without an SCR (97.4% vs 91%). This higher level of oxidation resulted in higher mercury removals in the scrubber. Total mercury removal averaged 97% on the unit with the SCR, and 87% on the unit without the SCR. The average mercury mass balance closure was 84% on Unit 1 and 103% on Unit 2.

J. A. Withum; J. E. Locke

2006-02-01T23:59:59.000Z

191

Mercury and Beyond: Diode-Pumped Solid-State Lasers for Inertial Fusion Energy  

SciTech Connect

We have begun building the ''Mercury'' laser system as the first in a series of new generation diode-pumped solid-state lasers for inertial fusion research. Mercury will integrate three key technologies: diodes, crystals, and gas cooling, within a unique laser architecture that is scalable to kilojoule energy levels for fusion energy applications. The primary performance goals include 10% electrical efficiencies at 10 Hz and 100 J with a 2-10 ns pulse length at 1.047 pm wavelength. When completed, Mercury will allow rep-rated target experiments with multiple target chambers for high energy density physics research.

Bibeau, C.; Beach, R.J.; Bayramian, A.; Chanteloup, J.C.; Ebbers, C.A.; Emanuel, M.A.; Orth, C.D.; Rothenberg, J.E.; Schaffers, K.I.; Skidmore, J.A.; Sutton, S.B.; Zapata, L.E.; Payne, S.A.; Powell, H.T.

1999-10-19T23:59:59.000Z

192

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

193

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":""}]}

194

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

195

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

196

NETL: Mercury Emissions Control Technologies - Evaluation of MerCAP for  

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

Evaluation of MerCAP(tm) for Power Plant Mercury Control Evaluation of MerCAP(tm) for Power Plant Mercury Control URS Group and its test team will perform research to further develop the novel Mercury Control via Adsorption Process (MerCAP™). The general MerCAP™ concept is to place fixed structures into a flue gas stream to adsorb mercury and then periodically regenerate them and recover the captured mercury. EPRI has shown that gold-based sorbents can achieve high levels of mercury removal in scrubbed flue gases. URS is proposing tests at two power plants using gold MerCAP™, installed downstream of either a baghouse or wet scrubber, to evaluate mercury removal from flue gas over a period of 6 months. At Great River Energy’s Stanton Station, which burns North Dakota lignite, sorbent structures will be retrofitted into a single compartment in the Unit 10 baghouse enabling reaction with a 6 MWe equivalence of flue gas. At Southern Company Services’ Plant Yates, which burns Eastern bituminous coal, gold-coated plates will be configured as a mist eliminator (ME) located downstream of a 1 MWe pilot wet absorber , which receives flue gas from Unit 1.

197

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

198

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.

199

Information Collection Request (ICR) Data Analysis to Meet Mercury and Air Toxics Standards (MATS) Requirements  

Science Conference Proceedings (OSTI)

With the promulgation of the new Mercury and Air Toxics Standards (MATS), power companies are looking for ways to comply with more stringent limits on emissions. This report summarizes the results of a study to identify trends among the operating parameters of various air pollutant control technologies that could explain differences in the levels of emissions for fine particulate matter, mercury, hydrochloric acid, and total metals reported to the ...

2012-12-20T23:59:59.000Z

200

Mercury Leachability From Concretes That Contain Fly Ashes and Activated Carbon Sorbents  

Science Conference Proceedings (OSTI)

This report presents new laboratory data on the leaching of mercury from concrete that contains fly ash and powdered activated carbon (PAC) sorbents used to capture mercury. The concretes studied during this project were made with fly ashes from lignite and subbituminous coal, including fly ashes containing PAC. Only very low levels of mercuryless than 5 parts per trillionwere leached from the fly ash concretes in both 18-hour and 7-day laboratory leach tests.

2007-07-18T23:59:59.000Z

Note: This page contains sample records for the topic "mercury levels cxs" 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

Predictable SCR co-benefits for mercury control  

Science Conference Proceedings (OSTI)

A test program, performed in cooperation with Dominion Power and the Babcock and Wilcox Co., was executed at Dominion Power's Mount Storm power plant in Grant County, W. Va. The program was focused on both the selective catalytic reduction (SCR) catalyst capability to oxide mercury as well as the scrubber's capability to capture and retain the oxidized mercury. This article focuses on the SCR catalyst performance aspects. The Mount Storm site consists of three units totaling approximately 1,660 MW. All units are equipped with SCR systems for NOx control. A full-scale test to evaluate the effect of the SCR was performed on Unit 2, a 550 MWT-fired boiler firing a medium sulfur bituminous coal. This test program demonstrated that the presence of an SCR catalyst can significantly affect the mercury speciation profile. Observation showed that in the absence of an SCR catalyst, the extent of oxidation of element a mercury at the inlet of the flue gas desulfurization system was about 64%. The presence of a Cornertech SCR catalyst improved this oxidation to levels greater than 95% almost all of which was captured by the downstream wet FGD system. Cornertech's proprietary SCR Hg oxidation model was used to accurately predict the field results. 1 ref., 2 figs., 1 tab.

Pritchard, S. [Cormtech Inc. (USA)

2009-01-15T23:59:59.000Z

202

Mercury and lead content in fuels: a literature review  

Science Conference Proceedings (OSTI)

The scope of this report is to provide information on levels of mercury and lead in fuels entering the portland cement manufacturing process. Information was gathered from published literature and cement companies. Most information available for fuels was for coal, followed by information on tire-derived and waste-derived fuel. Limited information was available for petroleum coke and heavy oil. The majority of studies report the maximum levels of mercury in coal, tire-derived fuel, petroleum coke, and heavy oil to be under 1 ppm. Mercury in coal is likely to be associated with pyrite, or organically associated. The majority of studies report the maximum levels of lead in coal to be under 25 ppm, with higher levels in tire-derived and waste-derived fuel, and no information found for lead in petroleum coke and heavy oil fuels. Values provided in this report are concentration levels, mean values, and standard deviation (as available). 24 refs., 7 tabs., 2 figs.

Hills, L.

2006-07-01T23:59:59.000Z

203

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

204

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

205

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

206

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

207

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

208

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

209

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

210

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

211

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...

212

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...

213

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...

214

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...

215

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

216

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...

217

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...

218

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...

219

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...

220

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

Note: This page contains sample records for the topic "mercury levels cxs" 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 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

222

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

223

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

224

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

225

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

226

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

227

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

228

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...

229

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...

230

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...

231

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...

232

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

233

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

234

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

235

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

236

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

237

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

238

CARBON BED MERCURY EMISSIONS CONTROL FOR MIXED WASTE TREATMENT  

Science Conference Proceedings (OSTI)

Mercury has had various uses in nuclear fuel reprocessing and other nuclear processes, and so is often present in radioactive and mixed (both radioactive and hazardous according tohe Resource Conservation and Recovery Act) wastes. Depending on regulatory requirements, the mercury in the off-gas must be controlled with sometimes very high efficiencies. Compliance to the Hazardous Waste Combustor (HWC) Maximum Achievable Control Technology (MACT) standards can require off-gas mercury removal efficiencies up to 99.999% for thermally treating some mixed waste streams. Several test programs have demonstrated this level of off-gas mercury control using fixed beds of granular sulfur-impregnated activated carbon. Other results of these tests include: (a) The depth of the mercury control mass transfer zone was less than 15-30 cm for the operating conditions of these tests, (b) MERSORBź carbon can sorb Hg up to 19 wt% of the carbon mass, and (c) the spent carbon retained almost all (98 – 99.99%) of the Hg; but when even a small fraction of the total Hg dissolves, the spent carbon can fail the TCLP test when the spent carbon contains high Hg concentrations. Localized areas in a carbon bed that become heated through heat of adsorption, to temperatures where oxidation occurs, are referred to as “bed hot spots.” Carbon bed hot spots must be avoided in processes that treat radioactive and mixed waste. Key to carbon bed hot spot mitigation are (a) designing for sufficient gas velocity, for avoiding gas flow maldistribution, and for sufficient but not excessive bed depth, (b) monitoring and control of inlet gas flowrate, temperature, and composition, (c) monitoring and control of in-bed and bed outlet gas temperatures, and (d) most important, monitoring of bed outlet CO concentrations. An increase of CO levels in the off-gas downstream of the carbon bed to levels about 50-100 ppm higher than the inlet CO concentration indicate CO formation in the bed, caused by carbon bed hot spots. Corrective actions must be implemented quickly if bed hot spots are detected, using a graded approach and sequence starting with corrective actions that are simple, quick, cause the least impact to the process, and are easiest to recover from. Multiple high and high-high alarm levels should be used, with appropriate corrective actions for each level.

Nick Soelberg; Joe Enneking

2010-11-01T23:59:59.000Z

239

General Relativity Problem of Mercury's Perihelion Advance Revisited  

E-Print Network (OSTI)

The work is devoted to the critical analysis of theoretical prediction and astronomical observation of GR effects, first of all, the Mercury's perihelion advance. In the first part, the methodological issues of observations are discussed including a practice of observations, a method of recognizing the relativistic properties of the effect and recovering it from bulk of raw data, a parametric observational model, and finally, methods of assessment of the effect value and statistical level of confidence. In the second part, the Mercury's perihelion advance and other theoretical problems are discussed in relationship with the GR physical foundations. Controversies in literature devoted to the GR tests are analyzed. The unified GR approach to particles and photons is discussed with the emphasis on the GR classical tests. Finally, the alternative theory of relativistic effect treatment is presented.

Anatoli A. Vankov

2010-08-10T23:59:59.000Z

240

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

242

FIELD TEST PROGRAM TO DEVELOP COMPREHENSIVE DESIGN, OPERATING, AND COST DATA FOR MERCURY CONTROL SYSTEMS  

Science Conference Proceedings (OSTI)

PG&E NEG Salem Harbor Station Unit 1 was successfully tested for applicability of activated carbon injection as a mercury control technology. Test results from this site have enabled a thorough evaluation of mercury control at Salem Harbor Unit 1, including performance, estimated cost, and operation data. This unit has very high native mercury removal, thus it was important to understand the impacts of process variables on native mercury capture. The team responsible for executing this program included plant and PG&E headquarters personnel, EPRI and several of its member companies, DOE, ADA, Norit Americas, Inc., Hamon Research-Cottrell, Apogee Scientific, TRC Environmental Corporation, Reaction Engineering, as well as other laboratories. The technical support of all of these entities came together to make this program achieve its goals. Overall the objectives of this field test program were to determine the mercury control and balance-of-plant impacts resulting from activated carbon injection into a full-scale ESP on Salem Harbor Unit 1, a low sulfur bituminous-coal-fired 86 MW unit. It was also important to understand the impacts of process variables on native mercury removal (>85%). One half of the gas stream was used for these tests, or 43 MWe. Activated carbon, DARCO FGD supplied by NORIT Americas, was injected upstream of the cold side ESP, just downstream of the air preheater. This allowed for approximately 1.5 seconds residence time in the duct before entering the ESP. Conditions tested in this field evaluation included the impacts of the Selective Non-Catalytic Reduction (SNCR) system on mercury capture, of unburned carbon in the fly ash, of adjusting ESP inlet flue gas temperatures, and of boiler load on mercury control. The field evaluation conducted at Salem Harbor looked at several sorbent injection concentrations at several flue gas temperatures. It was noted that at the mid temperature range of 322-327 F, the LOI (unburned carbon) lost some of its ability to capture vapor phase Hg, however activated carbon performed relatively well. At the normal operating temperatures of 298-306 F, mercury emissions from the ESP were so low that both particulate and elemental mercury were ''not detected'' at the detection limits of the Ontario Hydro method for both baseline and injection tests. The oxidized mercury however, was 95% lower at a sorbent injection concentration of 10 lbs/MMacf compared with baseline emissions. When the flue gas temperatures were increased to a range of 343-347 F, mercury removal efficiencies were limited to fly ash LOI, operation of the SNCR system, and flue gas temperature on the native mercury capture without sorbent injection. Listed below are the main conclusions from this program: (1) SNCR on/off test showed no beneficial effect on mercury removal caused by the SNCR system. (2) At standard operating temperatures ({approx} 300 F), reducing LOI from 30-35% to 15-20% had minimal impact on Hg removal. (3) Increasing flue gas temperatures reduced Hg removal regardless of LOI concentrations at Salem Harbor (minimum LOI was 15%). Native mercury removal started to fall off at temperatures above 320 F. ACI effectiveness for mercury removal fell off at temperatures above 340 F. (4) Test method detection limits play an important role at Salem Harbor due to the low residual emissions. Examining the proposed MA rule, both the removal efficiency and the emission concentrations will be difficult to demonstrate on an ongoing basis. (5) Under tested conditions the baseline emissions met the proposed removal efficiency for 2006, but not the proposed emission concentration. ACI can meet the more-stringent 2012 emission limits, as long as measurement detection limits are lower than the Ontario Hydro method. SCEM testing was able to verify the low emissions. For ACI to perform at this level, process conditions need to match those obtained during testing.

Michael D. Durham

2004-10-01T23:59:59.000Z

243

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.

244

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

245

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

246

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

247

MERCURY CONTROL WITH THE ADVANCED HYBRID PARTICULATE COLLECTOR  

DOE Green Energy (OSTI)

This project was awarded under U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) Program Solicitation DE-PS26-00NT40769 and specifically addresses Technical Topical Area 4-Testing Novel and Less Mature Control Technologies on Actual Flue Gas at the Pilot Scale. The project team includes 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 is now marketed as the ADVANCED HYBRID{trademark} Filter by Gore. The AHPC 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 AHPC 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 AHPC appears to have unique advantages for mercury control over baghouses or ESPs as an excellent gas-solid contactor. The objective of the three-task project is to demonstrate 90% total mercury control in the AHPC at a lower cost than current mercury control estimates. The approach includes bench-scale batch testing that ties the new work to previous results and links results with larger-scale pilot testing with real flue gas on a coal-fired combustion system, pilot-scale testing on a coal-fired combustion system with both a pulse-jet baghouse and an AHPC to prove or disprove the research hypotheses, and field demonstration pilot-scale testing at a utility power plant to prove scaleup and demonstrate longer-term mercury control. This project, if successful, will demonstrate at the pilot-scale level a technology that would provide a cost-effective technique to accomplish control of mercury emissions and, at the same time, greatly enhance 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 to a large segment of the U.S. utility industry as well as other industries requiring mercury control.

Stanley J. Miller; Ye Zhuang; Michelle R. Olderbak

2002-11-01T23:59:59.000Z

248

Demonstrations to Support Change to the >260 ppm Mercury Treatment Regulations  

SciTech Connect

The U.S. Department of Energy (DOE) and the U. S. Environmental Protection Agency (EPA) are working together to justify a change in the Land Disposal Restriction for High Mercury (>260 ppm mercury) waste. The present regulation that requires roasting or retorting is based on recovering and recycling the mercury in the waste. However, most of DOE’s High Mercury waste is radioactively contaminated, eliminating the possibility of its recycle. The radioactive mercury recovered must be amalgamated and disposed. In addition, concern over fugitive emissions from retorting and roasting operations has raised the question of whether such processing is environmentally sound. A change to the regulation to allow stabilization and disposal would reduce the overall environmental threat, if the stabilization process can reduce the leachability of the mercury to regulatory levels. Demonstrations are underway to gather data showing that the High Mercury waste can be safely stabilized. At the same time, comparison tests are being conducted using an improved form of the baseline retorting technology to better quantify the fugitive emission problem and determine the full capability of thermal desorption systems. A first round of demonstrations stabilizing mercury in soil from Brookhaven National Laboratory (BNL) has been completed. Four groups demonstrated their process on the waste: 1) BNL demonstrated its Sulfur Polymer Stabilization/Solidification process; 2) Nuclear Fuel Services used their DeHg (de-merk) process, 3) Allied Technology Group used chemical stabilization, and 4) Sepradyne demonstrated their vacuum thermal desorption system. All groups were successful in their tests, reaching regulatory levels for mercury leachability. Data for each group will be presented. DOE, EPA, and the University of Cincinnati are presently working on another series of tests involving treatment of surrogate sludge and soil by commercial vendors. Protocols that better determine the waste form’s ability to withstand leaching are being used to analyze the stabilized surrogates. Results of these and the previous demonstrations will be used to determine whether the High Mercury treatment regulation can be safely changed.

Hulet, Gregory Albert; Maio, Vincent Carl; Morris, M. I.; Lewis, J.; Randall, P.; Rieser, L.

2001-02-01T23:59:59.000Z

249

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

250

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

251

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

252

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

253

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

254

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

255

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

256

Utilization of Partially Gasified Coal for Mercury Removal  

Science Conference Proceedings (OSTI)

In this project, General Electric Energy and Environmental Research Corporation (EER) developed a novel mercury (Hg) control technology in which the sorbent for gas-phase Hg removal is produced from coal in a gasification process in-situ at a coal burning plant. The main objective of this project was to obtain technical information necessary for moving the technology from pilot-scale testing to a full-scale demonstration. A pilot-scale gasifier was used to generate sorbents from both bituminous and subbituminous coals. Once the conditions for optimizing sorbent surface area were identified, sorbents with the highest surface area were tested in a pilot-scale combustion tunnel for their effectiveness in removing Hg from coal-based flue gas. It was determined that the highest surface area sorbents generated from the gasifier process ({approx}600 m{sup 2}/g) had about 70%-85% of the reactivity of activated carbon at the same injection rate (lb/ACF), but were effective in removing 70% mercury at injection rates about 50% higher than that of commercially available activated carbon. In addition, mercury removal rates of up to 95% were demonstrated at higher sorbent injection rates. Overall, the results of the pilot-scale tests achieved the program goals, which were to achieve at least 70% Hg removal from baseline emissions levels at 25% or less of the cost of activated carbon injection.

Chris Samuelson; Peter Maly; David Moyeda

2008-09-09T23:59:59.000Z

257

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

258

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

259

The role of natural purified humic acids in modifying mercury accessibility in water and soil  

SciTech Connect

We investigated the influence of different humic acids (HAs, extracted from lignite, compost, and forest soil) on mercury mobility and availability both in a model solution and in soil samples from a mercury-polluted region. The technique of diffusive gradients in thin-films (DGT), which is capable of measuring: (i) free metal in solution: (ii) dissociated metal complexes previously mobilized by HA; (iii) mobilized metal-HA complexes that liberate metals by dissociation or by exchange reaction between the metal-HA complexes and the chelating groups on the resin-gel, was used in solutions and soils. The DGT measurements in solution, together with ultrafiltration, allowed estimation of the lability of Hg-HA complexes. Ultrafiltration results were also compared with predictions made by the windermere humic-aqueous model (WHAM). According to both these different approaches, Hg{sup 2+} resulted nearly 100% complexed by HAs, whereas results from ultrafiltration showed that 32 to 72% of the CH{sub 4}Hg{sup +} was bound to the HAs, with higher values for compost and lower values for forest and Aldrich HA. The DGT-measured mercury in soils was below 0.20 {mu}g L{sup -1}, irrespective of the extent of the contamination. Addition of HA increased the concentration of DGT-measured mercury in soil solution up to 100-fold in the contaminated soil and up to 30-fold in the control soil. The level of the increase also depended on the HA. The smallest increase (about 10 times) was found for lignite HA in both control and contaminated soils. The addition of forest HA gave the largest increases in DGT-measured mercury, in particular for the contaminated soil. Overall, the results demonstrated that DGT can be used for estimating the lability of mercury complexes in solution and for verifying enhanced mercury mobility when HA is added to contaminated soils.

Cattani, I.; Zhang, H.; Beone, G.M.; Del Re, A.A.M.; Boccelli, R.; Trevisan, M. [University of Cattolica Sacro Cuore, Piacenza (Italy)

2009-03-15T23:59:59.000Z

260

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.

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

262

OXIDATION OF MERCURY ACROSS SCR CATALYSTS IN COAL-FIRED POWER PLANTS BURNING LOW RANK FUELS  

SciTech Connect

The objectives of this program were to measure the oxidation of mercury in flue gas across SCR catalyst in a coal-fired power plant burning low rank fuels using a slipstream reactor containing multiple commercial catalysts in parallel and to develop a greater understanding of mercury oxidation across SCR catalysts in the form of a simple model. The Electric Power Research Institute (EPRI) and Argillon GmbH provided co-funding for this program. REI used a multicatalyst slipstream reactor to determine oxidation of mercury across five commercial SCR catalysts at a power plant that burned a blend of 87% subbituminous coal and 13% bituminous coal. The chlorine content of the blend was 100 to 240 {micro}g/g on a dry basis. Mercury measurements were carried out when the catalysts were relatively new, corresponding to about 300 hours of operation and again after 2,200 hours of operation. NO{sub x}, O{sub 2} and gaseous mercury speciation at the inlet and at the outlet of each catalyst chamber were measured. In general, the catalysts all appeared capable of achieving about 90% NO{sub x} reduction at a space velocity of 3,000 hr{sup -1} when new, which is typical of full-scale installations; after 2,200 hours exposure to flue gas, some of the catalysts appeared to lose NO{sub x} activity. For the fresh commercial catalysts, oxidation of mercury was in the range of 25% to 65% at typical full-scale space velocities. A blank monolith showed no oxidation of mercury under any conditions. All catalysts showed higher mercury oxidation without ammonia, consistent with full-scale measurements. After exposure to flue gas for 2,200 hours, some of the catalysts showed reduced levels of mercury oxidation relative to the initial levels of oxidation. A model of Hg oxidation across SCRs was formulated based on full-scale data. The model took into account the effects of temperature, space velocity, catalyst type and HCl concentration in the flue gas.

Constance Senior

2004-12-31T23:59:59.000Z

263

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

264

Mercury abatement report on the US Department of Energy Oak Ridge Y- 12 Plant for fiscal year 1995  

SciTech Connect

This Annual Mercury Abatement Report for fiscal year 1995 summarizes the status of activities and the levels of mercury contamination in East Fork Poplar Creek (EFPC) resulting from activities at the US Department of Energy`s Oak Ridge Y-12 Plant. The report outlines the status of the on-going project activities in support of project compliance, the results of the ongoing sampling and characterization efforts, the biological monitoring activities, and our conclusions relative to the progress in demonstrating compliance with the National Pollutant Discharge Elimination (NPDES) permit. Overall, the pace of mercury activities at the Y-12 Plant is ahead of the compliance schedules in the NPDES permit and new and exciting opportunities are being recognized for achieving additional mercury reductions. These opportunities were not felt to be achievable several years ago.

NONE

1995-11-01T23:59:59.000Z

265

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...

266

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

267

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

268

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

269

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)

270

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

271

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

272

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...

273

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...

274

Toxecon Retrofit for Mercury and Mulit-Pollutant Control on Three 90-MW Coal-Fired Boilers  

Science Conference Proceedings (OSTI)

This U.S. Department of Energy (DOE) Clean Coal Power Initiative (CCPI) project was based on a cooperative agreement between We Energies and the DOE Office of Fossil Energy's National Energy Technology Laboratory (NETL) to design, install, evaluate, and demonstrate the EPRI-patented TOXECON{trademark} air pollution control process. Project partners included Cummins & Barnard, ADA-ES, and the Electric Power Research Institute (EPRI). The primary goal of this project was to reduce mercury emissions from three 90-MW units that burn Powder River Basin coal at the We Energies Presque Isle Power Plant in Marquette, Michigan. Additional goals were to reduce nitrogen oxide (NO{sub x}), sulfur dioxide (SO{sub 2}), and particulate matter emissions; allow reuse and sale of fly ash; advance commercialization of the technology; demonstrate a reliable mercury continuous emission monitor (CEM) suitable for use at power plants; and demonstrate recovery of mercury from the sorbent. Mercury was controlled by injection of activated carbon upstream of the TOXECON{trademark} baghouse, which achieved more than 90% removal on average over a 44-month period. During a two-week test involving trona injection, SO{sub 2} emissions were reduced by 70%, although no coincident removal of NOx was achieved. The TOXECON{trademark} baghouse also provided enhanced particulate control, particularly during startup of the boilers. On this project, mercury CEMs were developed and tested in collaboration with Thermo Fisher Scientific, resulting in a reliable CEM that could be used in the power plant environment and that could measure mercury as low as 0.1 {micro}g/m{sup 3}. Sorbents were injected downstream of the primary particulate collection device, allowing for continued sale and beneficial use of captured fly ash. Two methods for recovering mercury using thermal desorption on the TOXECON{trademark} PAC/ash mixture were successfully tested during this program. Two methods for using the TOXECON{trademark} PAC/ash mixture in structural concrete were also successfully developed and tested. This project demonstrated a significant reduction in the rate of emissions from Presque Isle Units 7, 8, and 9, and substantial progress toward establishing the design criteria for one of the most promising mercury control retrofit technologies currently available. The Levelized Cost for 90% mercury removal at this site was calculated at $77,031 per pound of mercury removed with a capital cost of $63,189 per pound of mercury removed. Mercury removal at the Presque Isle Power Plant averages approximately 97 pounds per year.

Steven Derenne; Robin Stewart

2009-09-30T23:59:59.000Z

275

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

276

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

277

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

278

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

279

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

280

National Waste Processing Conference Proceedings ASME 1994 COMPARISON OF MERCURY TEST METHODS  

E-Print Network (OSTI)

in the exhaust flue gases from the MSW incinerators consist of nitric oxide (NO) and nitrogen dioxide (N02) which/fabric filter system to reduce nitrogen oxide, mercury and dioxin levels to meet the most recent Ontario combustion. The flue gases that exit the secondary chamber enter the heat recovery boilers where high

Columbia University

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

282

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

283

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

284

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...

285

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.

286

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)....

287

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

288

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

289

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

290

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

291

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 ...

292

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

293

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

294

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

295

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

296

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

297

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

298

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

299

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

300

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

302

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

303

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

304

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

305

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

306

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

307

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

308

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]

309

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

310

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

311

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

312

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

313

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

314

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

315

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.

316

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

317

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

318

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.

319

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

320

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.

Note: This page contains sample records for the topic "mercury levels cxs" 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

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).

322

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

323

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

324

Original Article Effect of Surface Polishing on Mercury Release from Dental Amalgam After Treatment 16 % Carbamide Peroxide Gel  

E-Print Network (OSTI)

Objectives: This study evaluated the effect of surface polishing on mercury release from dental amalgam after treatment with 16 % carbamide peroxide gel. Materials and Methods: Ninety-six samples from two different amalgam brands were prepared in truncated cone-shaped PVC polymer molds with an external surface area of 195 mm. Half of the specimens were polished with green and red rubber, a brush and tin oxide paste at low speed. Samples were treated with 16 % carbamide peroxide gel in tubes containing 3 mL of carbamide peroxide gel and 0.1 mL of distilled water for 14 and 28 hours. Subsequently, carbamide peroxide gel on the sample surfaces was rinsed away with 7.0 mL of distilled water until the volume of each tube increased to 10 mL. The mercury level of each solution was measured using the VAV–440 mercury analyzer system. Considering the surface area of each amalgam disc, mercury amounts were calculated in ”g ?mm. Data were analyzed using two-way ANOVA. Results: There were significant differences between the mean levels of mercury release from polished vs. unpolished amalgam surfaces after treatment with 16 % carbamide peroxide. Increasing the storage time from 14 to 28 hours did not result in significant

M. Azarsina; Sh. Kasraei; T. Masoum; Z. Khamverdi

2010-01-01T23:59:59.000Z

325

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

326

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

327

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.

328

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

329

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

330

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...

331

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

332

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

333

In Situ Mercury Stabilization (ISMS) Treatment: Technology Maturation Project Phase I Status Report  

SciTech Connect

Mercury (Hg) was used to separate lithium-6 isotope for weapons production at the Y-12 Plant in Oak Ridge in the 1950s and 1960s. As much as two million pounds of elemental mercury was 'lost' or unaccounted for and a large portion of that material is believed to have entered the environment. The DOE site office in Oak Ridge has identified Hg pollution in soils, sediments, and streams as the most significant environmental challenge currently faced. In industry, large amounts of mercury have been used to manufacture products (e.g., fluorescent light bulbs, thermometers) and for chemical processing (e.g., production of chlorine and alkali via mercury electrochemical cells) and many of these industrial sites are now polluted with mercury contaminated soil as a result of previous releases and/or inadvertent leaks. Remediation techniques for Hg contaminated soils are either based on thermal desorption and recovery of the mercury or excavation and shipping of large volumes of material to remote facilities for treatment and disposal. Both of these alternatives are extremely costly. The Brookhaven National Laboratory (BNL) Environmental Research & Technology Division (ERTD) has demonstrated, in laboratory-scale experiments, the viability of treating mercury contaminated soils by means of sulfide treatment rods inserted into the soil through a process known as In Situ Mercury Stabilization (ISMS). This approach is partly based on BNL's patented and successfully licensed ex situ process for Hg treatment, Sulfur Polymer Stabilization/Solidification (SPSS) which converts Hg to the more stable sulfide form. The original experiments showed that Hg homogeneously distributed in soil rapidly migrates to form a high concentration zone of chemically stable mercuric sulfide near the treatment rods while concentrations of Hg in surrounding areas away from the treatment rods are depleted to acceptable levels. BSA has subsequently filed for patent protection on the ISMS technology. If further developed it has the potential for large-scale in-situ treatment of contaminated soils that could substantially reduce the prohibitive cost of thermal desorption and/or excavation and disposal. Licensing and spin-off technology development opportunities would then be viable. Depending on performance and regulatory acceptance, the treated mercury could either be excavated for disposal elsewhere or left in place as a stable alternative. Excavated spent treatment rods could be processed by the SPSS process to reduce the potential for dispersion and lower leachability even further. The Phase I objectives of the In Situ Mercury Stabilization Treatment Process Technology Maturation Project were to: (1) replicate the original bench-scale results that formed the basis for BNL's patent application, i.e., mercury contamination in soil will migrate to and react with 'rods' containing sulfur and/or sulfur compounds, (2) provide enough information to evaluate a decision to conduct further development, and (3) establish some of the critical parameters that require further technology maturation during Phase II. The information contained in this report summarizes the work conducted in Phase I to meet these objectives.

Kalb,P.D.; Milian, L.

2008-03-01T23:59:59.000Z

334

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

335

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

336

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

337

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

338

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

339

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

340

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

342

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

343

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

344

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

345

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

346

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

347

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...

348

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

349

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

350

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

351

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

352

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.

353

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.

354

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

355

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

356

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

357

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

358

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

359

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...

360

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

362

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

363

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

364

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

365

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

366

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

367

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

368

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

369

FIELD TEST PROGRAM TO DEVELOP COMPREHENSIVE DESIGN, OPERATING, AND COST DATA FOR MERCURY CONTROL SYSTEMS  

SciTech Connect

PG&E NEG Salem Harbor Station Unit 1 was successfully tested for applicability of activated carbon injection as a mercury control technology. Test results from this site have enabled a thorough evaluation of mercury control at Salem Harbor Unit 1, including performance, estimated cost, and operation data. This unit has very high native mercury removal, thus it was important to understand the impacts of process variables on native mercury capture. The team responsible for executing this program included plant and PG&E headquarters personnel, EPRI and several of its member companies, DOE, ADA, Norit Americas, Inc., Hamon Research-Cottrell, Apogee Scientific, TRC Environmental Corporation, Reaction Engineering, as well as other laboratories. The technical support of all of these entities came together to make this program achieve its goals. Overall the objectives of this field test program were to determine the mercury control and balance-of-plant impacts resulting from activated carbon injection into a full-scale ESP on Salem Harbor Unit 1, a low sulfur bituminous-coal-fired 86 MW unit. It was also important to understand the impacts of process variables on native mercury removal (>85%). One half of the gas stream was used for these tests, or 43 MWe. Activated carbon, DARCO FGD supplied by NORIT Americas, was injected upstream of the cold side ESP, just downstream of the air preheater. This allowed for approximately 1.5 seconds residence time in the duct before entering the ESP. Conditions tested in this field evaluation included the impacts of the Selective Non-Catalytic Reduction (SNCR) system on mercury capture, of unburned carbon in the fly ash, of adjusting ESP inlet flue gas temperatures, and of boiler load on mercury control. The field evaluation conducted at Salem Harbor looked at several sorbent injection concentrations at several flue gas temperatures. It was noted that at the mid temperature range of 322-327 F, the LOI (unburned carbon) lost some of its ability to capture vapor phase Hg, however activated carbon performed relatively well. At the normal operating temperatures of 298-306 F, mercury emissions from the ESP were so low that both particulate and elemental mercury were ''not detected'' at the detection limits of the Ontario Hydro method for both baseline and injection tests. The oxidized mercury however, was 95% lower at a sorbent injection concentration of 10 lbs/MMacf compared with baseline emissions. When the flue gas temperatures were increased to a range of 343-347 F, mercury removal efficiencies were limited to <25%, even at the same sorbent injection concentration. Other tests examined the impacts of fly ash LOI, operation of the SNCR system, and flue gas temperature on the native mercury capture without sorbent injection. Listed below are the main conclusions from this program: (1) SNCR on/off test showed no beneficial effect on mercury removal caused by the SNCR system. (2) At standard operating temperatures ({approx} 300 F), reducing LOI from 30-35% to 15-20% had minimal impact on Hg removal. (3) Increasing flue gas temperatures reduced Hg removal regardless of LOI concentrations at Salem Harbor (minimum LOI was 15%). Native mercury removal started to fall off at temperatures above 320 F. ACI effectiveness for mercury removal fell off at temperatures above 340 F. (4) Test method detection limits play an important role at Salem Harbor due to the low residual emissions. Examining the proposed MA rule, both the removal efficiency and the emission concentrations will be difficult to demonstrate on an ongoing basis. (5) Under tested conditions the baseline emissions met the proposed removal efficiency for 2006, but not the proposed emission concentration. ACI can meet the more-stringent 2012 emission limits, as long as measurement detection limits are lower than the Ontario Hydro method. SCEM testing was able to verify the low emissions. For ACI to perform at this level, process conditions need to match those obtained during testing.

Michael D. Durham

2004-10-01T23:59:59.000Z

370

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...

371

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:...

372

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,...

373

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...

374

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...

375

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...

376

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 ...

377

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...

378

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. ...

379

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:

380

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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), ...

382

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

383

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...

384

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 *...

385

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 ...

386

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

387

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),...

388

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,...

389

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...

390

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

391

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."...

392

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...

393

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...

394

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...

395

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

396

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...

397

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

398

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

399

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

400

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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

402

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

403

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

404

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

405

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

406

Technology Evaluations Related to Mercury, Technetium, and Chloride in Treatment of Wastes at the Idaho Nuclear Technology and Engineering Center of the Idaho National Engineering and Environmental Laboratory  

SciTech Connect

The Idaho High-Level Waste and Facility Disposition Environmental Impact Statement defines alternative for treating and disposing of wastes stored at the Idaho Nuclear Technology and Engineering Center. Development is required for several technologies under consideration for treatment of these wastes. This report contains evaluations of whether specific treatment is needed and if so, by what methods, to remove mercury, technetium, and chlorides in proposed Environmental Impact Statement treatment processes. The evaluations of mercury include a review of regulatory requirements that would apply to mercury wastes in separations processes, an evaluation of the sensitivity of mercury flowrates and concentrations to changes in separations processing schemes and conditions, test results from laboratory-scale experiments of precipitation of mercury by sulfide precipitation agents from the TRUEX carbonate wash effluent, and evaluations of methods to remove mercury from New Waste Calcining Facility liquid and gaseous streams. The evaluation of technetium relates to the need for technetium removal and alternative methods to remove technetium from streams in separations processes. The need for removal of chlorides from New Waste Calcining Facility scrub solution is also evaluated.

C. M. Barnes; D. D. Taylor; S. C. Ashworth; J. B. Bosley; D. R. Haefner

1999-10-01T23:59:59.000Z

407

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

408

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

409

Computational Fluid Dynamics in Support of the SNS Liquid Mercury Thermal-Hydraulic Analysis  

SciTech Connect

Experimental and computational thermal-hydraulic research is underway to support the liquid mercury target design for the Spallation Neutron Source (SNS) facility. The SNS target will be subjected to internal nuclear heat generation that results from pulsed proton beam collisions with the mercury nuclei. Recirculation and stagnation zones within the target are of particular concern because of the likelihood that they will result in local hot spots and diminished heat removal from the target structure. Computational fluid dynamics (CFD) models are being used as a part of this research. Recent improvements to the 3D target model include the addition of the flow adapter which joins the inlet/outlet coolant pipes to the target body and an updated heat load distribution at the new baseline proton beam power level of 2 MW. Two thermal-hydraulic experiments are planned to validate the CFD model.

Siman-Tov, M.; Wendel, M.W.; Yoder, G.L.

1999-11-14T23:59:59.000Z

410

Superdeformation in the mercury region  

SciTech Connect

A brief history of superdeformation is presented. Calculations of superdeformed well depths, single particle energy level diagrams at I = 0, orbital alignments as a function of rotational frequency and dynamical moments of inertia are presented. The sensitivity of calculations to the details of the spin-orbit interaction are examined. Comparisons with experimental results are made. 37 refs., 9 figs.

Chasman, R.R.

1990-01-01T23:59:59.000Z

411

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.

412

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

413

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.

414

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

415

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

416

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

417

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

418

Choked-Flow Inlet Orifice Bubbler for Creating Small Bubbles in Mercury  

Science Conference Proceedings (OSTI)

Pressure waves created in liquid mercury pulsed spallation targets like the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory, induce cavitation damage on the target container. The cavitation damage is thought to limit the lifetime of the target for power levels at and above 1 MW. One way to mitigate the damage would be to absorb the pressure pulse energy into a dispersed population of small bubbles, however, creating a bubble size distribution that is sufficiently large and disperse in mercury is challenging due to the high surface tension. Also, measuring the population is complicated by the opacity and the high level of turbulent mixing. Recent advances in bubble diagnostics by batch sampling the mercury made it possible to compare bubble populations for different techniques in a SNS-1/20th scale test loop. More than 10 bubblers were tested and the most productive bubblers were taken for in-beam testing at the Los Alamos Neutron Science Center (LANSCE) WNR user facility. One bubbler design, referred to as the inlet-orifice bubbler, that showed moderate success in creating populations also has an added advantage that it could easily be included in the existing SNS full-scale mercury target configuration. Improvements to the bubbler were planned including a reduction of the nozzle size to choke the gas injection, thus steadying the injected mass flow and allowing multiple nozzles to work off of a common plenum. For the first time, reliable bubble population data are available in the prototypical target geometry and can be compared with populations that mitigated cavitation damage. This paper presents those experimental results.

Wendel, Mark W [ORNL; Abdou, Ashraf A [ORNL; Riemer, Bernie [ORNL

2013-01-01T23:59:59.000Z

419

Mercury Control for Plants Firing Texas Lignite and Equipped with ESP-wet FGD  

Science Conference Proceedings (OSTI)

This report presents the results of a multi-year test program conducted as part of Cooperative Agreement DE-FC26-06NT42779, 'Mercury Control for Plants Firing Texas Lignite and Equipped with ESP-wet FGD.' The objective of this program was to determine the level of mercury removal achievable using sorbent injection for a plant firing Texas lignite fuel and equipped with an ESP and wet FGD. The project was primarily funded by the U.S. DOE National Energy Technology Laboratory. EPRI, NRG Texas, Luminant (formerly TXU), and AEP were project co-funders. URS Group was the prime contractor, and Apogee Scientific and ADA-ES were subcontractors. The host site for this program was NRG Texas Limestone Electric Generating Station (LMS) Units 1 and 2, located in Jewett, Texas. The plant fires a blend of Texas lignite and Powder River Basin (PRB) coal. Full-scale tests were conducted to evaluate the mercury removal performance of powdered sorbents injected into the flue gas upstream of the ESP (traditional configuration), upstream of the air preheater, and/or between electric fields within the ESP (Toxecon{trademark} II configuration). Phases I through III of the test program, conducted on Unit 1 in 2006-2007, consisted of three short-term parametric test phases followed by a 60-day continuous operation test. Selected mercury sorbents were injected to treat one quarter of the flue gas (e.g., approximately 225 MW equivalence) produced by Limestone Unit 1. Six sorbents and three injection configurations were evaluated and results were used to select the best combination of sorbent (Norit Americas DARCO Hg-LH at 2 lb/Macf) and injection location (upstream of the ESP) for a two-month performance evaluation. A mercury removal rate of 50-70% was targeted for the long-term test. During this continuous-injection test, mercury removal performance and variability were evaluated as the plant operated under normal conditions. Additional evaluations were made to determine any balance-of-plant impacts of the mercury control process, including those associated with ESP performance and fly ash reuse properties. Upon analysis of the project results, the project team identified several areas of interest for further study. Follow-on testing was conducted on Unit 2 in 2009 with the entire unit treated with injected sorbent so that mercury removal across the FGD could be measured and so that other low-ash impact technologies could be evaluated. Three approaches to minimizing ash impacts were tested: (1) injection of 'low ash impact' sorbents, (2) alterations to the injection configuration, and (3) injection of calcium bromide in conjunction with sorbent. These conditions were tested with the goal of identifying the conditions that result in the highest mercury removal while maintaining the sorbent injection at a rate that preserves the beneficial use of ash.

Katherine Dombrowski

2009-12-31T23:59:59.000Z

420

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

Note: This page contains sample records for the topic "mercury levels cxs" 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

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,

422

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

423

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

424

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

425

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.

426

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

427

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,

428

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

429

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.

430

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:

431

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

432

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

433

Apparatus and method for removing mercury vapor from a gas stream  

DOE Patents (OSTI)

A metallic filter effectively removes mercury vapor from gas streams. The filter captures the mercury which then can be released and collected as product. The metallic filter is a copper mesh sponge plated with a six micrometer thickness of gold. The filter removes up to 90% of mercury vapor from a mercury contaminated gas stream.

Ganesan, Kumar (Butte, MT)

2008-01-01T23:59:59.000Z

434

Response to Comment on "Sources and Variations of Mercury in Tuna"  

E-Print Network (OSTI)

Response to Comment on "Sources and Variations of Mercury in Tuna" Dr. Aucott's comment on our as evidence against a surface source for methylmercury or that mercury in tuna is not responding to mercury that the emissions of mercury from Asia reach well into the region around Hawaii where the tuna were caught (see

Morel, François M. M.

435

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

436

FIELD TEST PROGRAM TO DEVELOP COMPREHENSIVE DESIGN, OPERATING, AND COST DATA FOR MERCURY CONTROL SYSTEMS  

SciTech Connect

With the Nation's coal-burning utilities facing the possibility of tighter controls on mercury pollutants, the U.S. Department of Energy is funding projects that could offer power plant operators better ways to reduce these emissions at much lower costs. Mercury is known to have toxic effects on the nervous system of humans and wildlife. Although it exists only in trace amounts in coal, mercury is released when coal burns and can accumulate on land and in water. In water, bacteria transform the metal into methylmercury, the most hazardous form of the metal. Methylmercury can collect in fish and marine mammals in concentrations hundreds of thousands times higher than the levels in surrounding waters. One of the goals of DOE is to develop technologies by 2005 that will be capable of cutting mercury emissions 50 to 70 percent at well under one-half of today's costs. ADA Environmental Solutions (ADA-ES) is managing a project to test mercury control technologies at full scale at four different power plants from 2000--2003. The ADA-ES project is focused on those power plants that are not equipped with wet flue gas desulfurization systems. ADA-ES has developed a portable system that will be tested at four different utility power plants. Each of the plants is equipped with either electrostatic precipitators or fabric filters to remove solid particles from the plant's flue gas. ADA-ES's technology will inject a dry sorbent, such as activated carbon, which removes the mercury and makes it more susceptible to capture by the particulate control devices. A fine water mist may be sprayed into the flue gas to cool its temperature to the range where the dry sorbent is most effective. PG&E National Energy Group is providing two test sites that fire bituminous coals and both are equipped with electrostatic precipitators and carbon/ash separation systems. Wisconsin Electric Power Company is providing a third test site that burns Powder River Basin (PRB) coal and has an electrostatic precipitator for particulate control. Alabama Power Company will host a fourth test at its Plant Gaston, which is equipped with a hot-side electrostatic precipitator and a downstream fabric filter.

Michael D. Durham

2003-05-01T23:59:59.000Z

437

Mercury Lamps Recycling Fluorescent light-tubes, compact fluorescent bulbs, mercury and sodium vapor lamps, ultraviolet and  

E-Print Network (OSTI)

Mercury Lamps Recycling Fluorescent light-tubes, compact fluorescent bulbs, mercury and sodium light tubes are recycled. They are made from aluminum and metal. Aluminum is a silver-white metal and is very light in weight and strong. Because aluminum is ductile, it can be drawn into wires or pressed

Ungerleider, Leslie G.