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Note: This page contains sample records for the topic "heavy metals removal" 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.


1

Process for removing heavy metal compounds from heavy crude oil  

DOE Patents [OSTI]

A process is provided for removing heavy metal compounds from heavy crude oil by mixing the heavy crude oil with tar sand; preheating the mixture to a temperature of about 650.degree. F.; heating said mixture to up to 800.degree. F.; and separating tar sand from the light oils formed during said heating. The heavy metals removed from the heavy oils can be recovered from the spent sand for other uses.

Cha, Chang Y. (Golden, CO); Boysen, John E. (Laramie, WY); Branthaver, Jan F. (Laramie, WY)

1991-01-01T23:59:59.000Z

2

Heavy metal removal and recovery using microorganisms  

SciTech Connect (OSTI)

Microorganisms -- bacteria, fungi, and microalgae -- can accumulate relatively large amounts of toxic heavy metals and radionuclides from the environment. These organisms often exhibit specificity for particular metals. The metal content of microbial biomass can be a substantial fraction of total dry weight with concentration factors (metal in dry biomass to metal in solution) exceeding one million in some cases. Both living and inert (dead) microbial biomass can be used to reduce heavy metal concentrations in contaminated waters to very low levels -- parts per billion and even lower. In many respects (e.g. specificity, residual metal concentrations, accumulation factors, and economics) microbial bioremoval processes can be superior to conventional processes, such as ion exchange and caustic (lime or hydroxide) precipitation for heavy metals removal from waste and contaminated waters. Thus, bioremoval could be developed to contribute to the clean-up of wastes at the Savannah River Site (SRS) and other DOE facilities. However, the potential advantages of bioremoval processes must still be developed into practical operating systems. A detailed review of the literature suggests that appropriate bioremoval processes could be developed for the SRS. There is great variability from one biomass source to another in bioremoval capabilities. Bioremoval is affected by pH, other ions, temperature, and many other factors. The biological (living vs. dead) and physical (immobilized vs. dispersed) characteristics of the biomass also greatly affect metal binding. Even subtle differences in the microbial biomass, such as the conditions under which it was cultivated, can have major effects on heavy metal binding.

Wilde, E.W. (Westinghouse Savannah River Co., Aiken, SC (United States)); Benemann, J.R. (Benemann (J.R.), Pinole, CA (United States))

1991-02-01T23:59:59.000Z

3

Magnetic Process For Removing Heavy Metals From Water Employing Magnetites  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Magnetic Process For Removing Heavy Metals From Water Employing Magnetic Process For Removing Heavy Metals From Water Employing Magnetites Magnetic Process For Removing Heavy Metals From Water Employing Magnetites A process for removing heavy metals from water is provided. The process includes the steps of introducing magnetite to a quantity of water containing heavy metal. Available for thumbnail of Feynman Center (505) 665-9090 Email Magnetic Process For Removing Heavy Metals From Water Employing Magnetites A process for removing heavy metals from water is provided. The process includes the steps of introducing magnetite to a quantity of water containing heavy metal. The magnetite is mixed with the water such that at least a portion of, and preferably the majority of, the heavy metal in the water is bound to the magnetite. Once this occurs the magnetite and

4

Heavy metals removal from oil sludge using ion exchange textiles.  

E-Print Network [OSTI]

??In this research, ion exchange textiles were used for the first time for the removal of heavy metals from oil sludge. The target metals which (more)

Muslat, Ziyad

2005-01-01T23:59:59.000Z

5

Removal of Heavy Metals from Industrial Effluent Using Bacteria  

E-Print Network [OSTI]

Industrial development results in the generation of industrial effluents, and if untreated results in water, sediment and soil pollution. (Fakayode and Onianwa, 2002 ? Fakayode, 2005). Industrial wastes and emission contain toxic and hazardous substances, most of which are detrimental to human health (Jimena et al.,2008 ? Ogunfowokan et al.,2005 ? Rajaram et al.,2008). The key pollutants include heavy metals, chemical wastes and oil spills etc. Heavy metal resistant bacteria have significant role in bioremediation of heavy metals in wastewater. The objective of this work is to study the role of bacteria in removing the heavy metals present in the industrial effluent.Five effluent samples out of nine were selected for this study due to high content of heavy metals. The heavy metals Hg and Cu were removed by Bacillus sp. The average Hg reduction was 45 % and Cu reduction was recorded as 62%. The heavy metals Cd, As and Co were removed by Pseudomonas sp. The average Cd reduction was 56%, average As reduction was 34 % and average Co reduction was recorded as 53%. The heavy metals Cd and Cu were removed by Staphylococcus sp. The average Cd reduction was 44 % and average Cu reduction was recorded as 34 %.

Manisha N; Dinesh Sharma; Arun Kumar

6

Removal of heavy metals from samples of residual sludge  

Science Journals Connector (OSTI)

Nitric acid leaching processes were evaluated for removal of heavy metals from samples of residual sludge from an industrial and municipal wastewater plant. The study showed that an acid:water ratio of 1:1 and a nitric acid concentration of 2 mol 1?1 gave efficient removal of 86.7%, 100% and 100% of copper, nickel and arsenic.

Jose Abrego

1996-01-01T23:59:59.000Z

7

SEPARATION OF HEAVY METALS: REMOVAL FROM INDUSTRIAL WASTEWATERS  

Office of Scientific and Technical Information (OSTI)

SEPARATION SEPARATION OF HEAVY METALS: REMOVAL FROM INDUSTRIAL WASTEWATERS AND CONTAMINATED SOIL* Robert W. Peters + and Linda Shem Energy Systems Division Argonne National Laboratory 9700 South Cass Avenue Argonne, Illinois 60439 Abstract This paper reviews the applicable separation technologies relating to removal of heavy metals from solution and from soils in order to present the state-of-the-art in the field. Each technology is briefly described and typical operating conditions and technology performance are presented. Technologies described include chemical precipitation (including hydroxide, carbonate, or sulfide reagents), coagulation/flocculation, ion exchange, solvent extraction, extraction with chelating agents, complexation, electrochemical operation, cementation, membrane operations, evaporation, adsorption, solidification/stabilization, and

8

Tunable Biopolymers for Heavy Metal Removal Jan Kostal, Ashok Mulchandani, and Wilfred Chen*  

E-Print Network [OSTI]

persistent nature, heavy metal ions are major contributors to pollution of the biosphere.1,2 These metalsTunable Biopolymers for Heavy Metal Removal Jan Kostal, Ashok Mulchandani, and Wilfred Chen synthesized for the removal of heavy metals from dilute waste streams. Protein-protein interaction

Chen, Wilfred

9

Functionalized Nanoporous Silica for Removal of Heavy Metals...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(SAMMS) have previously demonstrated the ability to serve as very effective heavy metal sorbents in a range of aquatic and environmental systems suggesting they may be...

10

SEPARATION OF HEAVY METALS: REMOVAL FROM INDUSTRIAL WASTEWATERS  

Office of Scientific and Technical Information (OSTI)

a two- or three-stage operation to remove the metals and 0il sepcrately). ComplexationSequestration Complexation involves the formation of a complex or chelating agent....

11

Magnetic Process For Removing Heavy Metals From Water Employing...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of heavy metals from water using the process outlined above. U.S. Patent No.: 7,153,435 (DOE S-100,646) Patent Application Filing Date: July 22, 2003 Patent Issue Date: December 26...

12

Silica coated magnetite nanoparticles for removal of heavy metal ions from polluted waters  

E-Print Network [OSTI]

Magnetic removal of Hg2+ and other heavy metal ions like Cd2+, Pb2+ etc. using silica coated magnetite particles from polluted waters is a current topic of active research to provide efficient water recycling and long term high quality water. The technique used to study the bonding characteristics of such kind of nanoparticles with the heavy metal ions is a very sensitive hyperfine specroscopy technique called the perturbed angular correlation technique (PAC).

Dash, Monika

2013-01-01T23:59:59.000Z

13

Method for removal of heavy metal from molten salt in IFR fuel pyroprocessing  

SciTech Connect (OSTI)

This report details the pyrometallurgical process for recycling spent metal fuels from the Integral Fast Reactor (IFR) which involves electrorefining spent fuel in a molten salt electrolyte (LiCl-KCI-U/PuCl{sub 3}) at 500{degree}C. The total heavy metal chloride concentration in the salt will be about 2 mol %. At some point, the concentrations of alkali, alkaline earth, and rare earth fission products in the salt must be reduced to lower the amount of heat generated in the electrorefiner. The heavy metal concentration in the salt must be reduced before removing the fission products from the salt. The operation uses a lithium-cadmium alloy anode that is solid at 500{degree}C, a solid mandrel cathode with a ceramic catch crucible below to collect heavy metal that falls off it, and a liquid cadmium cathode. The design criteria that had to be met by this equipment included the following: (1) control of the reduction rate by lithium, (2) good separation between heavy metal and rare earths, and (3) the capability to collect heavy metal and rare earths over a wide range of salt compositions. In tests conducted in an engineering-scale electrorefiner (10 kg uranium per cathode), good separation was achieved while removing uranium and rare earths from the salt. Only 13% of the rare earths was removed, while 99.9% of the uranium in the salt was removed; subsequently, the rare earths were also reduced to low concentrations. The uranium concentration in the salt was reduced to 0.05 ppm after uranium and rare earths were transferred from the salt to a solid mandrel cathode with a catch crucible. Rare earth concentrations in the salt were reduced to less than 0.01 wt % in these operations. Similar tests are planned to remove plutonium from the salt in a laboratory-scale (100--300 g heavy metal) electrorefiner.

Gay, E.C.; Miller, W.E.; Laidler, J.J.

1994-02-01T23:59:59.000Z

14

Removal of heavy metals from effluent. (Latest citations from Pollution Abstracts database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning the removal of lead, cadmium, mercury, and other heavy metals from waste waters. Precipitation, reverse osmosis, complexation, ultrafiltration, and adsorption are among the techniques described. The citations examine the efficiency, operational difficulties, cost effectiveness, and optimization of these methods. Prevention and remediation of metal pollution from electroplating, mining, smelting, and other industries are included. (Contains 250 citations and includes a subject term index and title list.)

Not Available

1993-10-01T23:59:59.000Z

15

Sewage sludge ash to phosphorus fertiliser: Variables influencing heavy metal removal during thermochemical treatment  

SciTech Connect (OSTI)

The aim of this study was to improve the removal of heavy metals from sewage sludge ash by a thermochemical process. The resulting detoxified ash was intended for use as a raw material rich in phosphorus (P) for inorganic fertiliser production. The thermochemical treatment was performed in a rotary kiln where the evaporation of relevant heavy metals was enhanced by additives. The four variables investigated for process optimisation were treatment temperature, type of additive (KCl, MgCl{sub 2}) and its amount, as well as type of reactor (directly or indirectly heated rotary kiln). The removal rates of Cd, Cr, Cu, Ni, Pb, Zn and of Ca, P and Cl were investigated. The best overall removal efficiency for Cd, Cu, Pb and Zn could be found for the indirectly heated system. The type of additive was critical, since MgCl{sub 2} favours Zn- over Cu-removal, while KCl acts conversely. The use of MgCl{sub 2} caused less particle abrasion from the pellets in the kiln than KCl. In the case of the additive KCl, liquid KCl - temporarily formed in the pellets - acted as a barrier to heavy metal evaporation as long as treatment temperatures were not sufficiently high to enhance its reaction or evaporation.

Mattenberger, H.; Fraissler, G. [Austrian Bioenergy Centre GmbH, Inffeldgasse 21b, 8010 Graz (Austria); Brunner, T. [Austrian Bioenergy Centre GmbH, Inffeldgasse 21b, 8010 Graz (Austria); BIOS BIOENERGIESYSTEME GmbH, Inffeldgasse 21b, 8010 Graz (Austria)], E-mail: thomas.brunner@abc-energy.at; Herk, P. [ARP GmbH, Johann Sacklgasse 65-67, 8700 Leoben (Austria); Hermann, L. [Austrian Bioenergy Centre GmbH, Inffeldgasse 21b, 8010 Graz (Austria); ASH DEC Umwelt AG, Donaufelderstrasse 101/4/5, 1210 Wien (Austria); Obernberger, I. [Austrian Bioenergy Centre GmbH, Inffeldgasse 21b, 8010 Graz (Austria); BIOS BIOENERGIESYSTEME GmbH, Inffeldgasse 21b, 8010 Graz (Austria)

2008-12-15T23:59:59.000Z

16

On the use of biosurfactants for the removal of heavy metals from oil-contaminated soil  

SciTech Connect (OSTI)

The feasibility of using biodegradable biosurfactants to remove heavy metals from an oil-contaminated soil was evaluated by batch washes with surfactin, a rhamnolipid and a sophorolipid. The soil contained 890 mg/kg of zinc and 420 mg/kg of copper with a 12.6% oil and grease content. Highest levels of zinc removal were obtained using 12% rhamnolipid and 4% sophorolipid/0.7% HCl. Highest copper removal rates were achieved with 12% rhamnolipid or with 2% rhamnolipid/1% NaOH or 0.25% surfactin/1% NaOH. A series of five batch washes removed 70% of the copper with 0.1% surfactin/1% NaOH while 4% sophorolipid/0.7% HCl was able to remove 100% of the zinc. Sequential extraction procedures showed that the carbonate and oxide fractions accounted for over 90% of the zinc present in the soil and the organic fraction in the soil constituted over 70% of the copper. Sequential extraction of the soil after washing with the surfactin or rhamnolipid indicated that these surfactants could remove the organically-bound copper and that the sophorolipid with acid could remove the carbonate and oxide-bound zinc. In conclusion, the results clearly indicated the feasibility of removing the metals with the anionic biosurfactants tested even though the exchangeable metal fractions were very low.

Mulligan, C.N. [Concordia Univ., Montreal, Quebec (Canada). Dept. of Building, Civil and Environmental Engineering] [Concordia Univ., Montreal, Quebec (Canada). Dept. of Building, Civil and Environmental Engineering; Yong, R.N. [Univ. of Wales, Cardiff (United Kingdom)] [Univ. of Wales, Cardiff (United Kingdom); Gibbs, B.F. [Bivan Consultants Inc., Montreal, Quebec (Canada). Environmental Div.] [Bivan Consultants Inc., Montreal, Quebec (Canada). Environmental Div.

1999-05-01T23:59:59.000Z

17

Removal of radioactive materials and heavy metals from water using magnetic resin  

DOE Patents [OSTI]

Magnetic polymer resins capable of efficient removal of actinides and heavy metals from contaminated water are disclosed together with methods for making, using, and regenerating them. The resins comprise polyamine-epichlorohydrin resin beads with ferrites attached to the surfaces of the beads. Markedly improved water decontamination is demonstrated using these magnetic polymer resins of the invention in the presence of a magnetic field, as compared with water decontamination methods employing ordinary ion exchange resins or ferrites taken separately. 9 figs.

Kochen, R.L.; Navratil, J.D.

1997-01-21T23:59:59.000Z

18

Separation of heavy metals: Removal from industrial wastewaters and contaminated soil  

SciTech Connect (OSTI)

This paper reviews the applicable separation technologies relating to removal of heavy metals from solution and from soils in order to present the state-of-the-art in the field. Each technology is briefly described and typical operating conditions and technology performance are presented. Technologies described include chemical precipitation (including hydroxide, carbonate, or sulfide reagents), coagulation/flocculation, ion exchange, solvent extraction, extraction with chelating agents, complexation, electrochemical operation, cementation, membrane operations, evaporation, adsorption, solidification/stabilization, and vitrification. Several case histories are described, with a focus on waste reduction techniques and remediation of lead-contaminated soils. The paper concludes with a short discussion of important research needs in the field.

Peters, R.W.; Shem, L.

1993-03-01T23:59:59.000Z

19

Method of removal of heavy metal from molten salt in IFR fuel pyroprocessing  

SciTech Connect (OSTI)

An electrochemical method of separating heavy metal values from a radioactive molten salt including Li halide at temperatures of about 500{degree}C. The method comprises positioning a solid Li-Cd alloy anode in the molten salt containing the heavy metal values, positioning a Cd-containing cathode or a solid cathode positioned above a catch crucible in the molten salt to recover the heavy metal values, establishing a voltage drop between the anode and the cathode to deposit material at the cathode to reduce the concentration of heavy metals in the salt, and controlling the deposition rate at the cathode by controlling the current between the anode and cathode.

Gay, E.C.

1993-12-23T23:59:59.000Z

20

Method of removal of heavy metal from molten salt in IFR fuel pyroprocessing  

DOE Patents [OSTI]

An electrochemical method of separating heavy metal values from a radioactive molten salt including Li halide at temperatures of about 500.degree. C. The method comprises positioning a solid Li--Cd alloy anode in the molten salt containing the heavy metal values, positioning a Cd-containing cathode or a solid cathode positioned above a catch crucible in the molten salt to recover the heavy metal values, establishing a voltage drop between the anode and the cathode to deposit material at the cathode to reduce the concentration of heavy metals in the salt, and controlling the deposition rate at the cathode by controlling the current between the anode and cathode.

Gay, Eddie C. (Park Forest, IL)

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Rapid removal of heavy metal ions from aqueous solutions by low cost adsorbents  

Science Journals Connector (OSTI)

In the present investigation, different agricultural solid wastes namely: eggplant hull (EH), almond green hull (AGH), and walnut shell (WS), that are introduced as low cost adsorbents, were used for the removal of heavy metals (cobalt, strontium and mercury ions) from aqueous solutions. Activation process and/or chemical treatments using H2O2 and NH3 were performed on these raw materials to increase their adsorption performances. The effectiveness of these adsorbents was studied in batch adsorption mode under a variety of experimental conditions such as: different chemical treatments, various amounts of adsorbents, initial metal-ion concentrations, pH of solutions, contact times, and solution temperatures. High metal adsorption efficiencies were achieved for all cases only in the first two to three minutes of adsorbents' contact time. Maximum adsorption capacity of AGH sorbent for cobalt and EH for mercury were found to be 45.5 mg/g and 147.06 mg/g, respectively. The adsorption capacity of mercury for WS was also obtained as 151.5 and 100.9 mg/g for two different treated sorbents.

Ali Ahmadpour; Tahereh Rohani Bastami; Masumeh Tahmasbi; Mohammad Zabihi

2012-01-01T23:59:59.000Z

22

Heavy metal removal and recovery using microorganisms. Volume 1, State-of-the-art and potential applications at the SRS  

SciTech Connect (OSTI)

Microorganisms -- bacteria, fungi, and microalgae -- can accumulate relatively large amounts of toxic heavy metals and radionuclides from the environment. These organisms often exhibit specificity for particular metals. The metal content of microbial biomass can be a substantial fraction of total dry weight with concentration factors (metal in dry biomass to metal in solution) exceeding one million in some cases. Both living and inert (dead) microbial biomass can be used to reduce heavy metal concentrations in contaminated waters to very low levels -- parts per billion and even lower. In many respects (e.g. specificity, residual metal concentrations, accumulation factors, and economics) microbial bioremoval processes can be superior to conventional processes, such as ion exchange and caustic (lime or hydroxide) precipitation for heavy metals removal from waste and contaminated waters. Thus, bioremoval could be developed to contribute to the clean-up of wastes at the Savannah River Site (SRS) and other DOE facilities. However, the potential advantages of bioremoval processes must still be developed into practical operating systems. A detailed review of the literature suggests that appropriate bioremoval processes could be developed for the SRS. There is great variability from one biomass source to another in bioremoval capabilities. Bioremoval is affected by pH, other ions, temperature, and many other factors. The biological (living vs. dead) and physical (immobilized vs. dispersed) characteristics of the biomass also greatly affect metal binding. Even subtle differences in the microbial biomass, such as the conditions under which it was cultivated, can have major effects on heavy metal binding.

Wilde, E.W. [Westinghouse Savannah River Co., Aiken, SC (United States); Benemann, J.R. [Benemann (J.R.), Pinole, CA (United States)

1991-02-01T23:59:59.000Z

23

Method of removal of heavy metal from molten salt in IFR fuel pyroprocessing  

DOE Patents [OSTI]

An electrochemical method is described for separating heavy metal values from a radioactive molten salt including Li halide at temperatures of about 500 C. The method comprises positioning a solid Li--Cd alloy anode in the molten salt containing the heavy metal values, positioning a Cd-containing cathode or a solid cathode positioned above a catch crucible in the molten salt to recover the heavy metal values, establishing a voltage drop between the anode and the cathode to deposit material at the cathode to reduce the concentration of heavy metals in the salt, and controlling the deposition rate at the cathode by controlling the current between the anode and cathode. 3 figs.

Gay, E.C.

1995-10-03T23:59:59.000Z

24

Removal of heteroatoms and metals from heavy oils by bioconversion processes  

SciTech Connect (OSTI)

Biocatalysts, either appropriate microorganisms or isolated enzymes, will be used in an aqueous phase in contact with the heavy oil phase to extract heteroatoms such as sulfur from the oil phase by bioconversion processes. Somewhat similar work on coal processing will be adapted and extended for this application. Bacteria such as Desulfovibrio desulfuricans will be studied for the reductive removal of organically-bound sulfur and bacteria such as Rhodococcus rhodochrum will be investigated for the oxidative removal of sulfur. Isolated bacteria from either oil field co-produced sour water or from soil contaminated by oil spills will also be tested. At a later time, bacteria that interact with organic nitrogen may also be studied. This type of interaction will be carried out in advanced bioreactor systems where organic and aqueous phases are contacted. One new concept of emulsion-phase contacting, which will be investigated, disperses the aqueous phase in the organic phase and is then recoalesced for removal of the contaminants and recycled back to the reactor. This program is a cooperative research and development program with the following companies: Baker Performance Chemicals, Chevron, Energy BioSystems, Exxon, Texaco, and UNOCAL. After verification of the bioprocessing concepts on a laboratory-scale, the end-product will be a demonstration of the technology at an industrial site. This should result in rapid transfer of the technology to industry.

Kaufman, E.N.

1996-06-01T23:59:59.000Z

25

Heavy metal biosensor  

DOE Patents [OSTI]

Compositions and methods are provided for detection of certain heavy metals using bacterial whole cell biosensors.

Hillson, Nathan J; Shapiro, Lucille; Hu, Ping; Andersen, Gary L

2014-04-15T23:59:59.000Z

26

Removal of selected heavy metals from aqueous solutions using a solid by-product from the Jordanian oil shale refining  

Science Journals Connector (OSTI)

...?The potential use of treated solid by-product of oil shale to treat aqueous solutions containing several heavy ... Results indicate that the solid by-product of oil shale removes Cd(II), Cu(II),...

W. Y. Abu-El-Sha'r; S. H. Gharaibeh; M. M. Al-Kofahi

1999-12-01T23:59:59.000Z

27

Enhanced Bioaccumulation of Heavy Metals by Bacterial Cells Displaying  

E-Print Network [OSTI]

Enhanced Bioaccumulation of Heavy Metals by Bacterial Cells Displaying Synthetic Phytochelatins for enhanced bioaccumulation of toxic metals. Synthetic genes encoding for several metal strategy for develop- ing high-affinity bioadsorbents suitable for heavy metal removal. © 2000 John Wiley

Chen, Wilfred

28

Removal of heteroatoms and metals from heavy oils by bioconversion processes. CRADA final report  

SciTech Connect (OSTI)

The objective of this Cooperative research and Development Agreement project between Oak Ridge National Laboratory ( O W ) and Baker Performance Chemicals (BPC), Chevron, Energy BioSystems, Exxon, UNOCAL and Texaco is to investigate the biological desukrization of crude oil. Biological removal of organic s&%r fiom crude oil offers an attractive alternative to conventional thermochemical treatment due to the mild operating conditions afforded by the biocatalyst. In order for biodesulfbrization to realize commercial success, reactors must be designed which allow for sufficient liquid / liquid and gas / liquid mass transfer while simultaneously reducing operating costs. To this end we have been developing advanced bioreactors for biodesufirization and have been studying their performance using both actual crude oil as well as more easily characterized model systems.

Kaufman, E N; Borole, A P

1999-03-01T23:59:59.000Z

29

Photoactivated metal removal  

SciTech Connect (OSTI)

The authors propose the use of photochromic dyes as light activated switches to bind and release metal ions. This process, which can be driven by solar energy, can be used in environmental and industrial processes to remove metals from organic and aqueous solutions. Because the metals can be released from the ligands when irradiated with visible light, regeneration of the ligands and concentration of the metals may be easier than with conventional ion exchange resins. Thus, the process has the potential to be less expensive than currently used metal extraction techniques. In this paper, the authors report on their studies of the metal binding of spirogyran dyes and the hydrolytic stability of these dyes. They have prepared a number of spirogyrans and measured their binding constants for calcium and magnesium. They discuss the relationship of the structure of the dyes to their binding strengths. These studies are necessary towards determining the viability of this technique.

Nimlos, M.R.; Filley, J.; Ibrahim, M.A.; Watt, A.S.; Blake, D.M.

1999-07-01T23:59:59.000Z

30

Silica-polyamine composite materials for heavy metal ion removal, recovery, and recycling. 2. Metal ion separations from mine wastewater and soft metal ion extraction efficiency  

SciTech Connect (OSTI)

Silica-polyamine composites have been synthesized which have metal ion capacities as high as 0.84 mmol/g for copper ions removed from aqueous solutions. In previous reports it has been demonstrated that these materials survive more than 3,000 cycles of metal ion extraction, elution, and regeneration with almost no loss of capacity (less than 10%). This paper describes two modified silica-polyamine composite materials and reveals the results of tests designed to determine the effectiveness of these materials for extracting and separating metal ions from actual mining wastewater samples. Using these materials, the concentration of copper, aluminum, and zinc in Berkeley Pit mine wastewater is reduced to below allowable discharge limits. The recovered copper and zinc solutions were greater than 90% pure, and metal ion concentration factors of over 20 for copper were realized. Further, the ability of one of these materials to decrease low levels of the soft metals cadmium, mercury, and lead from National Sanitation Foundation recommended challenge levels to below Environmental Protection Agency allowable limits is also reported.

Fischer, R.J.; Pang, D.; Beatty, S.T.; Rosenberg, E.

1999-12-01T23:59:59.000Z

31

PHYTOEXTRACTION OF HEAVY METALS  

E-Print Network [OSTI]

) Type of phytoremediation Cost effective form of environmental remediation (Glass 1999) Chelating Agents: desorb heavy metals from soil matrix and form water-soluble metal complexes (Shen et al -using hyperaccumulator plant biomass to produce a bio-ore for commercial use -Li et al. look at using Ni

Blouin-Demers, Gabriel

32

Heavy metals in wastewater: Their removal through algae adsorption and their roles in microwave assisted pyrolysis of algae.  

E-Print Network [OSTI]

??Chlorella vulgaris was found as a good biosorbent for copper, zinc and aluminum. pH value, reaction time, initial metal and algal sorbents concentrations were considered (more)

Zhao, Yuan

2012-01-01T23:59:59.000Z

33

Plant rhamnogalacturonan II complexation of heavy metal cations  

DOE Patents [OSTI]

The present invention provides rhamnogalacturonan-II (RG-II) and relates to its ability to complex specific multivalent heavy metal cations. In the presence of boric acid, RG-II monomers form dimers that are cross-linked by a borate ester. The yield of such borate ester cross-linked dimers of RG-II is enhanced in the presence of specific heavy metal cations. The present invention further relates to the utility of RG-II in assays for the detection of specific heavy metal contamination; as a reagent useful in the removal of specific heavy metal cations contaminating foods and liquids, for example, fish, wines, etc.; as a pharmaceutical composition useful as an antidote in specific heavy metal cation poisoning; as a treatment for the detoxification of specific heavy metal cations from blood and/or tissues; and in a method of remediation of waters and soils contaminated with specific heavy metal cations.

O'Neill, Malcolm A. (Winterville, GA); Pellerin, Patrice J. M. (Montpellier, FR); Warrenfeltz, Dennis (Athens, GA); Vidal, Stephane (Combaillaux, FR); Darvill, Alan G. (Athens, GA); Albersheim, Peter (Athens, GA)

1999-01-01T23:59:59.000Z

34

Plant rhamnogalacturonan II complexation of heavy metal cations  

DOE Patents [OSTI]

The present invention provides rhamnogalacturonan-II (RG-II) and relates to its ability to complex specific multivalent heavy metal cations. In the presence of boric acid, RG-II monomers form dimers that are cross-linked by a borate ester. The yield of such borate ester cross-linked dimers of RG-II is enhanced in the presence of specific heavy metal cations. The present invention further relates to the utility of RG-II in assays for the detection of specific heavy metal contamination; as a reagent useful in the removal of specific heavy metal cations contaminating foods and liquids, for example, fish, wines, etc.; as a pharmaceutical composition useful as an antidote in specific heavy metal cation poisoning; as a treatment for the detoxification of specific heavy metal cations from blood and/or tissues; and in a method of remediation of waters and soils contaminated with specific heavy metal cations. 15 figs.

O`Neill, M.A.; Pellerin, P.J.M.; Warrenfeltz, D.; Vidal, S.; Darvill, A.G.; Albersheim, P.

1999-03-02T23:59:59.000Z

35

OXFORD BIBLIOGRAPHIES IN ECOLOGY "HEAVY METAL TOLERANCE"  

E-Print Network [OSTI]

cellular mechanisms affected by heavy metals is Bánfalvi 2011. Pollution by heavy metals is an important environmental problem, and sources that focus on heavy metal pollution often contain information about heavyOXFORD BIBLIOGRAPHIES IN ECOLOGY "HEAVY METAL TOLERANCE" By Nishanta Rajakaruna and Robert S. Boyd

Rajakaruna, Nishanta

36

Removal of dissolved metals by the Imperial and Brawley Constructed Wetlands, Imperial Valley, C.A.  

E-Print Network [OSTI]

??The main objective of this study was to examine the effectiveness of heavy metal removal by two pilot constructed wetlands in Imperial Valley, California. The (more)

Bucher, Tiffany N.

2013-01-01T23:59:59.000Z

37

A Better Method for Evaluating Heavy Metal Water Pollution  

E-Print Network [OSTI]

efforts to control heavy metal pollution have focused oncomponent of heavy metal pollution, Dr. Hering found thatthat makes measuring heavy metal pollution a moving target.

Hering, Janet

2002-01-01T23:59:59.000Z

38

Extraction process for removing metallic impurities from alkalide metals  

DOE Patents [OSTI]

A development is described for removing metallic impurities from alkali metals by employing an extraction process wherein the metallic impurities are extracted from a molten alkali metal into molten lithium metal due to the immiscibility of the alkali metals in lithium and the miscibility of the metallic contaminants or impurities in the lithium. The purified alkali metal may be readily separated from the contaminant-containing lithium metal by simple decanting due to the differences in densities and melting temperatures of the alkali metals as compared to lithium.

Royer, L.T.

1987-03-20T23:59:59.000Z

39

Heavy metals in Antarctic organisms  

SciTech Connect (OSTI)

To evaluate levels of essential (zinc and copper) and non-essential (mercury and cadmium) heavy metals, 34 species of organisms from different areas close to the Antarctic Peninsula were analysed. These included algae, filter-feeders, omnivorous invertebrates and vertebrates. Mercury was not detected, while cadmium was found in the majority of organisms analysed (detection limit was 0.05 ppm for both metals). The highest cadmium concentration was observed in the starfish Odontaster validus. Anthozoans, sipunculids and nudibranchs showed maximum levels of zinc, while the highest copper level was found in the gastropod Trophon brevispira. Mercury and cadmium levels in fishes were below the detection limit. Concentrations of essential and non-essential metals in birds were highest in liver followed by muscle and eggs. Cadmium and mercury levels in muscle of southern elephant seals were above the detection limit, whereas in Antarctic fur seals they were below it. The objective of the study was to gather baseline information for metals in Antarctic Ocean biota that may be needed to detect, measure and monitor future environmental changes. 46 refs., 7 figs., 8 tabs.

Moreno, J.E.A. de; Moreno, V.J. [Universidad Nacional de Mar del Plata (Argentina); Gerpe, M.S.; Vodopivez, C. [Instituto Antartico Argentino, Buenos Aires (Argentina)

1997-02-01T23:59:59.000Z

40

Attrition resistant catalysts and sorbents based on heavy metal poisoned FCC catalysts  

DOE Patents [OSTI]

A heavy metal poisoned, spent FCC catalyst is treated by chemically impregnating the poisoned catalyst with a new catalytic metal or metal salt to provide an attrition resistant catalyst or sorbent for a different catalytic or absorption process, such as catalysts for Fischer-Tropsh Synthesis, and sorbents for removal of sulfur gases from fuel gases and flue-gases. The heavy metal contaminated FCC catalyst is directly used as a support for preparing catalysts having new catalytic properties and sorbents having new sorbent properties, without removing or passivating the heavy metals on the spent FCC catalyst as an intermediate step.

Gangwal, S.; Jothimurugesan, K.

1999-07-27T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Attrition resistant catalysts and sorbents based on heavy metal poisoned FCC catalysts  

DOE Patents [OSTI]

A heavy metal poisoned, spent FCC catalyst is treated by chemically impregnating the poisoned catalyst with a new catalytic metal or metal salt to provide an attrition resistant catalyst or sorbent for a different catalytic or absorption processes, such as catalysts for Fischer-Tropsh Synthesis, and sorbents for removal of sulfur gasses from fuel gases and flue-gases. The heavy metal contaminated FCC catalyst is directly used as a support for preparing catalysts having new catalytic properties and sorbents having new sorbent properties, without removing or "passivating" the heavy metals on the spent FCC catalyst as an intermediate step.

Gangwal, Santosh (Cary, NC); Jothimurugesan, Kandaswamy (Hampton, VA)

1999-01-01T23:59:59.000Z

42

High Metal Removal Rate Process for Machining Difficult Materials...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

High Metal Removal Rate Process for Machining Difficult Materials High Metal Removal Rate Process for Machining Difficult Materials highmetalremovalprocessfactsheet.pdf More...

43

Ultrasensitive Voltammetric Detection of Trace Heavy Metal Ions...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Voltammetric Detection of Trace Heavy Metal Ions Using Carbon Nanotube Nanoelectrode Array. Ultrasensitive Voltammetric Detection of Trace Heavy Metal Ions Using Carbon Nanotube...

44

Process for removing metals from water  

DOE Patents [OSTI]

A process for removing metals from water including the steps of prefiltering solids from the water, adjusting the pH to between about 2 and 3, reducing the amount of dissolved oxygen in the water, increasing the pH to between about 6 and 8, adding water-soluble sulfide to precipitate insoluble sulfide- and hydroxide-forming metals, adding a containing floc, and postfiltering the resultant solution. The postfiltered solution may optionally be eluted through an ion exchange resin to remove residual metal ions. 2 tabs.

Napier, J.M.; Hancher, C.M.; Hackett, G.D.

1987-06-29T23:59:59.000Z

45

Chemistry 330 / Study Guide 217 Toxic Heavy Metals  

E-Print Network [OSTI]

Chemistry 330 / Study Guide 217 Unit 7 Toxic Heavy Metals Overview In ancient Rome wine was stored for this section. #12;Chemistry 330 / Study Guide 219 Common Features--Toxicity of the Heavy Metals Objectives. Metals--especially heavy metals--pose a unique environmental pollution problem. Heavy metals

Short, Daniel

46

Method for removing metal ions from solution with titanate sorbents  

DOE Patents [OSTI]

A method for removing metal ions from solution comprises the steps of providing titanate particles by spray-drying a solution or slurry comprising sorbent titanates having a particle size up to 20 micrometers, optionally in the presence of polymer free of cellulose functionality as binder, said sorbent being active towards heavy metals from Periodic Table (CAS version) Groups IA, IIA, IB, IIB, IIIB, and VIII, to provide monodisperse, substantially spherical particles in a yield of at least 70 percent of theoretical yield and having a particle size distribution in the range of 1 to 500 micrometers. The particles can be used free flowing in columns or beds, or entrapped in a nonwoven, fibrous web or matrix or a cast porous membrane, to selectively remove metal ions from aqueous or organic liquid.

Lundquist, Susan H. (White Bear Township, MN); White, Lloyd R. (Minneapolis, MN)

1999-01-01T23:59:59.000Z

47

Detection of Heavy Metal Ions Based on Quantum Point Contacts  

E-Print Network [OSTI]

. The ability to detect trace amounts of metal ions is important because of the toxicity of heavy metal ionsDetection of Heavy Metal Ions Based on Quantum Point Contacts Vasanth Rajagopalan, Salah Boussaad on many living organisms and the consequence of heavy metal ions not being biodegradable. To date, heavy

Zhang, Yanchao

48

Heavy Metal Tolerance Robert S. Boyd, Nishanta Rajakaruna  

E-Print Network [OSTI]

be useful to solve environmental problems caused by heavy metal pollution. General Overviews General: a recent example targeting cellular mechanisms affected by heavy metals is Bánfalvi 2011. Pollution by heavy metals is an important environmental problem, and sources that focus on heavy metal pollution

Rajakaruna, Nishanta

49

Surfactant biocatalyst for remediation of recalcitrant organics and heavy metals  

DOE Patents [OSTI]

Novel strains of isolated and purified bacteria have been identified which have the ability to degrade petroleum hydrocarbons including a variety of PAHs. Several isolates also exhibit the ability to produce a biosurfactant. The combination of the biosurfactant-producing ability along with the ability to degrade PAHs enhances the efficiency with which PAHs may be degraded. Additionally, the biosurfactant also provides an additional ability to bind heavy metal ions for removal from a soil or aquatic environment.

Brigmon, Robin L. (North Augusta, SC); Story, Sandra (Greenville, SC); Altman; Denis J. (Evans, GA); Berry, Christopher J. (Aiken, SC)

2011-03-29T23:59:59.000Z

50

Surfactant biocatalyst for remediation of recalcitrant organics and heavy metals  

DOE Patents [OSTI]

Novel strains of isolated and purified bacteria have been identified which have the ability to degrade petroleum hydrocarbons including a variety of PAHs. Several isolates also exhibit the ability to produce a biosurfactant. The combination of the biosurfactant-producing ability along with the ability to degrade PAHs enhances the efficiency with which PAHs may be degraded. Additionally, the biosurfactant also provides an additional ability to bind heavy metal ions for removal from a soil or aquatic environment.

Brigmon, Robin L. (North Augusta, SC); Story, Sandra (Greenville, SC); Altman, Denis J. (Evans, GA); Berry, Christopher J. (Aiken, SC)

2011-03-15T23:59:59.000Z

51

Surfactant biocatalyst for remediation of recalcitrant organics and heavy metals  

DOE Patents [OSTI]

Novel strains of isolated and purified bacteria have been identified which have the ability to degrade petroleum hydrocarbons including a variety of PAHs. Several isolates also exhibit the ability to produce a biosurfactant. The combination of the biosurfactant-producing ability along with the ability to degrade PAHs enhances the efficiency with which PAHs may be degraded. Additionally, the biosurfactant also provides an additional ability to bind heavy metal ions for removal from a soil or aquatic environment.

Brigmon, Robin L. (North Augusta, SC); Story, Sandra (Greenville, SC); Altman, Denis (Evans, GA); Berry, Christopher J. (Aiken, SC)

2009-01-06T23:59:59.000Z

52

Surfactant biocatalyst for remediation of recalcitrant organics and heavy metals  

DOE Patents [OSTI]

Novel strains of isolated and purified bacteria have been identified which have the ability to degrade petroleum hydrocarbons including a variety of PAHs. Several isolates also exhibit the ability to produce a biosurfactant. The combination of the biosurfactant-producing ability along with the ability to degrade PAHs enhances the efficiency with which PAHs may be degraded. Additionally, the biosurfactant also provides an additional ability to bind heavy metal ions for removal from a soil or aquatic environment.

Brigmon, Robin L. (North Augusta, SC); Story, Sandra (Greenville, SC); Altman, Denis J. (Evans, GA); Berry, Christopher J. (Aiken, SC)

2011-05-03T23:59:59.000Z

53

Regenerative process for removal of mercury and other heavy metals from gases containing H.sub.2 and/or CO  

DOE Patents [OSTI]

A method for removal of mercury from a gaseous stream containing the mercury, hydrogen and/or CO, and hydrogen sulfide and/or carbonyl sulfide in which a dispersed Cu-containing sorbent is contacted with the gaseous stream at a temperature in the range of about 25.degree. C. to about 300.degree. C. until the sorbent is spent. The spent sorbent is contacted with a desorbing gaseous stream at a temperature equal to or higher than the temperature at which the mercury adsorption is carried out, producing a regenerated sorbent and an exhaust gas comprising released mercury. The released mercury in the exhaust gas is captured using a high-capacity sorbent, such as sulfur-impregnated activated carbon, at a temperature less than about 100.degree. C. The regenerated sorbent may then be used to capture additional mercury from the mercury-containing gaseous stream.

Jadhav, Raja A. (Naperville, IL)

2009-07-07T23:59:59.000Z

54

Gold Nanoparticle-Based Sensing of "Spectroscopically Silent" Heavy Metal  

E-Print Network [OSTI]

of aqueous heavy metal ions, including toxic metals such as lead, cadmium, and mercury, is describedLetters Gold Nanoparticle-Based Sensing of "Spectroscopically Silent" Heavy Metal Ions Youngjin Kim that by functionalizing metal nanoparticles with appropriate heavy-metal ion receptors, the particles might be coaxed

55

Natural removal of added N-nutrients, reactive phosphorus, crude oil, and heavy metals from the water phase in a simulated water/sediment system  

SciTech Connect (OSTI)

Water/sediment simulation systems were constructed by using an aquarium (0.45 x 0.29 x 0.35 m{sup 3}), filled with suitable amounts of water and sediment collected from three selected locations: Lan Hau Shan (LHS), Tai Hu (TH), and Loong Yu Tao (LYT) of the Zhujiang (Pearl River) Estuary of China in November 1992 at low-tide period. The salinities of the water samples collected form LHS, TH, LYT were found to be 0.2, 4.6, 16.2 g L{sup -1}, respectively. Known amounts of ammonium, nitrate, nitrite, reactive phosphorous, crude oil, arsenate(III), cadmium (II), copper(II), and zinc(II) were added as pollutants into each of the water/sediment simulation systems. The rates of the natural removal of each added pollutant in all water/sediment simulation systems were studied by monitoring their concentrations at various intrevals in the investigation period. Except for Cr(III) and reactive phosphorous in the water/sediment systems of the LHS, TH, and LYT sites, and nitrate in the TH and LYT sites, the concentrations of the added pollutants in the water phase of the studied systems under a flow-condition simulation were reduced to 8% or less of the corresponding added amount on or before the 12th day by natural processes. The rate of self-purification and the estimated assimulative capacity of each added pollutant in all water/sediment simulation systems is discussed. 30 refs., 11 figs., 4 tabs.

Lam-Leung, S.Y.; Cheung, M.T. [Hong Kong Baptist Univ., Kowloon (Hong Kong)] [Hong Kong Baptist Univ., Kowloon (Hong Kong); He, Y.Q. [South China Sea Institute of Oceanology, Guangzhou (China)] [and others] [South China Sea Institute of Oceanology, Guangzhou (China); and others

1996-08-01T23:59:59.000Z

56

Process for removing technetium from iron and other metals  

DOE Patents [OSTI]

A process for removing technetium from iron and other metals comprises the steps of converting the molten, alloyed technetium to a sulfide dissolved in manganese sulfide, and removing the sulfide from the molten metal as a slag. 4 figs.

Leitnaker, J.M.; Trowbridge, L.D.

1999-03-23T23:59:59.000Z

57

Situ formation of apatite for sequestering radionuclides and heavy metals  

DOE Patents [OSTI]

Methods for in situ formation in soil of a permeable reactive barrier or zone comprising a phosphate precipitate, such as apatite or hydroxyapatite, which is capable of selectively trapping and removing radionuclides and heavy metal contaminants from the soil, while allowing water or other compounds to pass through. A preparation of a phosphate reagent and a chelated calcium reagent is mixed aboveground and injected into the soil. Subsequently, the chelated calcium reagent biodegrades and slowly releases free calcium. The free calcium reacts with the phosphate reagent to form a phosphate precipitate. Under the proper chemical conditions, apatite or hydroxyapatite can form. Radionuclide and heavy metal contaminants, including lead, strontium, lanthanides, and uranium are then selectively sequestered by sorbing them onto the phosphate precipitate. A reducing agent can be added for reduction and selective sequestration of technetium or selenium contaminants.

Moore, Robert C. (Edgewood, NM)

2003-07-15T23:59:59.000Z

58

Heavy metals behaviour in a gasification reactor  

Science Journals Connector (OSTI)

Sludge coming from cleaning processes of wastewater, Municipal Solid Waste (MSW), and Refuse Derived Fuel (RDF) can be exploited for producing energy because of their heating value. Cleaning the produced syngas is important because of environmental troubles, ... Keywords: heavy metals, syngas, thermodynamic, waste gasification

Martino Paolucci; Carlo Borgianni; Paolo De Filippis

2011-07-01T23:59:59.000Z

59

STANDARD OPERATING PROCEDURE HEAVY METAL SALTS (selected)  

E-Print Network [OSTI]

MSDS ___Special training provided by the department/supervisor ___Review of the OSHA Lab Standard ___Review of the departmental safety manual ___Review of the Chemical Hygiene Plan ___Safety meetings12.1 STANDARD OPERATING PROCEDURE for HEAVY METAL SALTS (selected) Location

Pawlowski, Wojtek

60

Phytoremediation of Heavy Metal Toxicity and Role of soil in Rhizobacteria  

E-Print Network [OSTI]

Abstract- Our surrounding is filled up with a large number of toxicants in different forms. They contaminate our water, land and atmosphere where we live. Heavy metal pollution of soil is a significant environmental problem and has its negative impact on human health and agriculture. Rhizosphere, as an important interface of soil and plant, plays a significant role in phytoremediation of contaminated soil by heavy metals, in which, microbial populations are known to affect heavy metal mobility and availability to the plant through release of chelating agents, acidification, phosphate solubilization and redox changes. Phytoremediation of toxic heavy metals could be carried out by using specific metallophytes. Green plants are the lungs of nature with unique ability to purifying impure air by photosynthesis and remove or minimize heavy metals toxicity from soil and water ecosystem by absorption, accumulation and biotransformation process. This article paper reviews some recent advances in effect and significance of rhizobacteria in phytoremediation of heavy metal toxicity in contaminated soils. There is also a need to improve our understanding of the mechanisms involved in the transfer and mobilization of heavy metals by rhizobacteria and to conduct research on the selection of microbial isolates from Rhizosphere of plants growing metal contaminated soils for specific restoration programmes. Index Terms- Environmental, heavy metal toxicity,

Rajendra Prasad Bharti; Abhilasha Shri Vastava; Kishor Soni; Asha Tiwari; Shivbhanu More

Note: This page contains sample records for the topic "heavy metals removal" 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

Detection of Heavy Metal Ions in Drinking Water Using a  

E-Print Network [OSTI]

, and clinical toxicology. A number of techniques have been developed over the years for heavy metal ion analysisDetection of Heavy Metal Ions in Drinking Water Using a High-Resolution Differential Surface-resolution differential surface plasmon resonance (SPR) sensor for heavy metal ion detection. The sensor surface

Chen, Wilfred

62

Tons of Heavy Metals in Mill Creek Sediments Heather Freeman  

E-Print Network [OSTI]

objectives for this summer research were to: 1.) determine how much heavy metal pollution has accumulatedTons of Heavy Metals in Mill Creek Sediments Heather Freeman 8/30/99 Geology Department Advisors: Dr. Kees DeJong Dr. Barry Manyard Dr. David Nash #12;Tons of heavy metals in Mill Creek sediments

Maynard, J. Barry

63

REVIEW ARTICLE Heavy Metal Pollutants and Chemical Ecology: Exploring  

E-Print Network [OSTI]

REVIEW ARTICLE Heavy Metal Pollutants and Chemical Ecology: Exploring New Frontiers Robert S. Boyd to be learned about how heavy metal pollution impacts organisms, and that exciting new research frontiers as pollutants (Han et al. 2002), including Cd, Cu, Cr, Hg, Pb, Ni, and Zn. Much research on heavy metal

Boyd, Robert S.

64

Enrichment of Heavy Metals in Sediment Resulting from Soil  

E-Print Network [OSTI]

, Harpenden, Hertfordshire AL5 2JQ, U.K. Heavy metal pollution of soil and water is often associatedEnrichment of Heavy Metals in Sediment Resulting from Soil Erosion on Agricultural Fields J O H N N concentrations of these heavy metals were up to 3.98 times higher in the sediment than in the parent soil

Quinton, John

65

Sorption of heavy metals by modified chelating ion exchangers  

Science Journals Connector (OSTI)

Satisfactory sorption capacity towards heavy metals of several physically modified chelating resins at low pH is reported. It was found that the linear sorption isotherms are the most appropriate for describing the sorption of Ni and Pb. The data obtained revealed that the chelating resins studied are able to remove selectively copper from a complex synthetic solution containing Fe, Mn and Pb. The regeneration of Lewatit TP 208 by 10% H2SO4 in batch conditions proved to be effective through three consecutive runs of loading-regeneration.

Valentin Nenov; Bogdan Bonev

2010-01-01T23:59:59.000Z

66

Metal Removal from Contaminated Soil and Sediments by the Biosurfactant Surfactin  

Science Journals Connector (OSTI)

Batch soil washing experiments were performed to evaluate the feasibility of using surfactin from Bacillus subtilis, a lipopeptide biosurfactant, for the removal of heavy metals from a contaminated soil and sediments. ... A study was conducted on the effect of two different biological factors, microbial surfactants and biodegradation, on the kinetics of partitioning of polycyclic aromatic hydrocarbons (PAHs) from nonaqueous-phase liquids (NAPLs). ...

Catherine N. Mulligan; Raymond N. Yong; Bernard F. Gibbs; Susan James; H. P. J. Bennett

1999-09-28T23:59:59.000Z

67

Customizable biopolymers for heavy metal remediation Jan Kostal, Giridhar Prabhukumar, U. Loi Lao, Alin Chen, Mark Matsumoto, Ashok Mulchandani and  

E-Print Network [OSTI]

contamination by heavy metals is prevalent at hazardous waste sites in the United States. Annually, fuel for removing the polymer­metal complexes (Thompson & Jarvinen, 1999). The target metal ions can be recovered be used to remediate contaminated soils and solid surfaces and treat aqueous wastes, it can also

Chen, Wilfred

68

Concentrations of Heavy Metals in Selected Tissues of Blue  

E-Print Network [OSTI]

Abstract: Persian Gulf supports diverse ecosystems and biota in need of remediation and protection and metal data from this region is needed. The levels of heavy metals (Fe, Hg, Ni and Pb) in tissues (hepatopancreas, muscle and exoskeleton) of blue swimming crab, Portunus pelagicus and sediments in the Persian Gulf coasts, south Iran were investigated. Heavy metals analysis was performed by Atomic Absorption Spectrophotometer. The concentration of heavy metals in sediments at all sampling stations occurs in descending order of Fe> Ni> Hg> Pb during both seasons. The distribution pattern of heavy metals in the tissues of crab and sediments was as follows: sediment> hepatopancreasn> muscle> exoskeleton. Maximum concentration of the total heavy metals in sediments and all tissues of P. pelagicus observes in Bahrekan station (Pheavy metals in the tissues of the crab P. pelagicus. In present study recorded that there was negligible differences in heavy metals levels between different seasons. Differences in heavy metals concentrations among the species is likely to have resulted from metal bioavailability, hydrodynamics of the environment, changes in tissue composition, stations of collection and sources of pollution within Persian Gulf.

Mehdi Hosseini; Afshin Abdi Bastami; Javad Kazemzadeh Khoei; Maryam Esmailian; Elmira Janmohammadi Songhori; Mina Najafzadeh

69

Heavy metal balances of an Italian soil as affected by sewage sludge and Bordeaux mixture applications  

SciTech Connect (OSTI)

Applications of sewage sludge and Bordeaux mixture (Bm) (a mixture of copper sulfate and lime) add heavy metals to the soil. At an experimental farm in the Cremona district (Italy), the authors measured current heavy metal contents in soil and their removal via harvested products. They also measured heavy metal adsorption by soil from this farm. With these data, projections were made of the long-term development of heavy metal (Cd, Cu, and Zn) contents in soil, crop removal, and leaching at different application rates of sewage sludge and Bm. These projections were compared with existing quality standards of the European Union (EU) and Italy with regard to soil and groundwater. The calculations reveal that the permitted annual application rates of sewage sludge and Bm are likely to result in exceedance of groundwater and soil standards. Sewage sludge applications, complying with the Italian legal limits, may pose problems for Cd, Cu, and Zn within 30, 70, and 100 yr, respectively. Furthermore, severe Cu pollution of integrated and especially organic (Bm only) vineyards is unavoidable with the currently allowed application rates of Bm. The results suggest that the current Italian soil protection policy as well as the EU policy are not conducive of a sustainable heavy metal management in agroecosystems.

Moolenaar, S.W. [Wageningen Agricultural Univ. (Netherlands); Beltrami, P. [Univ. Cattolica del Sacro Cuore, Piacenza (Italy)

1998-07-01T23:59:59.000Z

70

Heavy Metal Tolerance in Plants J.ANTONOVIOS  

E-Print Network [OSTI]

#12;Heavy Metal Tolerance in Plants J.ANTONOVIOS Department of Biology. University of Stirling to Sprays and Toxicants . . 33 3.Metal Tolerance in Laboratory Strains . . . 34 Present address: Department.K. I. Introduction . . . . . . . . . . . 2 I1. Ecology of Metal Tolerance . . . . . . . . . 4 A

Antonovics, Janis

71

Pentek metal coating removal system: Baseline report  

SciTech Connect (OSTI)

The Pentek coating removal technology was tested and is being evaluated at Florida International University (FIU) as a baseline technology. In conjunction with FIU`s evaluation of efficiency and cost, this report covers evaluation conducted for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The Pentek coating removal system consisted of the ROTO-PEEN Scaler, CORNER-CUTTER{reg_sign}, and VAC-PAC{reg_sign}. They are designed to remove coatings from steel, concrete, brick, and wood. The Scaler uses 3M Roto Peen tungsten carbide cutters while the CORNER-CUTTER{reg_sign} uses solid needles for descaling activities. These hand tools are used with the VAC-PAC{reg_sign} vacuum system to capture dust and debris as removal of the coating takes place. The safety and health evaluation during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure minimal, but noise exposure was significant. Further testing for each exposure is recommended because of the environment where the testing demonstration took place. It is feasible that the dust and noise levels will be higher in an enclosed operating environment of different construction. In addition, other areas of concern found were arm-hand vibration, whole-body, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout.

NONE

1997-07-31T23:59:59.000Z

72

Heavy Liquid Metal Reactor Development - Nuclear Engineering Division  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

> Heavy Liquid Metal Reactor Development > Heavy Liquid Metal Reactor Development Capabilities Nuclear Systems Modeling and Design Analysis Reactor Physics and Fuel Cycle Analysis Nuclear Data Program Advanced Reactor Development Overview Advanced Fast Reactor (AFR) Heavy Liquid Metal Reactor Development Generation IV Nuclear Waste Form and Repository Performance Modeling Nuclear Energy Systems Design and Development Other Capabilities Work with Argonne Contact us For Employees Site Map Help Advanced Reactor Development and Technology Heavy Liquid Metal Reactor Development Bookmark and Share STAR-LM: Simplified, Modular, Small Reactor Featuring Flow-thru Fuel Cartridge STAR-LM: Simplified, Modular, Small Reactor Featuring Flow-thru Fuel Cartridge. Click on image to view larger image. Argonne has traditionally been the foremost institute in the US for

73

Bioremediation of soil contaminated with hydrocarbons and heavy metals  

SciTech Connect (OSTI)

This investigation showed that a soil contaminated with petroleum hydrocarbons and heavy metals had sufficient indigenous microbial activity for hydrocarbon biodegradation under nonlimiting conditions. Nutrient supplementation with nitrogen and phosphate, together with aeration, seemed to be the most important factors for enhancing biodegradation. Hydrocarbon biodegradation occurred to a much greater extent under aerobic than under anaerobic conditions. Biodegradation did, however, induce low pH conditions and thus caused high heavy-metal concentrations in the leachate. Anaerobic conditions inhibited hydrocarbon biodegradation with no subsequent drop in pH and low heavy-metal concentrations in the leachate. Thus, anaerobic conditions were shown to facilitate less metal mobility than low pH conditions. Air sparging did not cause a significant increase in biodegradation. Adsorption of heavy-fraction hydrocarbons (> C{sub 20}) to microorganisms and colloidal material in the leachate was suspected of facilitating mobility of these fractions and thus their subsequent detection in the leachate.

Plessis, C.A. du; Phaal, C.B.; Senior, E. [Univ. of Natal, Scottsville (South Africa)

1995-12-31T23:59:59.000Z

74

Reduction of Heavy Metals by Cytochrome c(3)  

SciTech Connect (OSTI)

We report on reduction and precipitation of Se(VI), Pb(II), CU(II), U(VI), Mo(VI), and Cr(VI) in water by cytochrome c{sub 3} isolated from Desulfomicrobium baczdatum [strain 9974]. The tetraheme protein cytochrome c{sub 3} was reduced by sodium dithionite. Redox reactions were monitored by UV-visible spectroscopy of cytochrome c{sub 3}. Analytical electron microscopy work showed that Se(VI), Pb(II), and CU(II) were reduced to the metallic state, U(W) and Mo(W) to U(IV) and Mo(IV), respectively, and Cr(VI) probably to Cr(III). U(IV) and Mo(W) precipitated as oxides and Cr(III) as an amorphous hydroxide. Cytochrome c{sub 3} was used repeatedly in the same solution without loosing its effectiveness. The results suggest usage of cytochrome c{sub 3} to develop innovative and environmentally benign methods to remove heavy metals from waste- and groundwater.

ABDELOUAS,A.; GONG,W.L.; LUTZE,W.; NUTTALL,E.H.; SPRAGUE,F.; SHELNUTT,JOHN A.; STRIETELMEIER,B.A.; FRANCO,R.; MOURA,I.; MOURA,J.J.G.

2000-01-18T23:59:59.000Z

75

Heavy metal ions are potent inhibitors of protein folding  

SciTech Connect (OSTI)

Environmental and occupational exposure to heavy metals such as cadmium, mercury and lead results in severe health hazards including prenatal and developmental defects. The deleterious effects of heavy metal ions have hitherto been attributed to their interactions with specific, particularly susceptible native proteins. Here, we report an as yet undescribed mode of heavy metal toxicity. Cd{sup 2+}, Hg{sup 2+} and Pb{sup 2+} proved to inhibit very efficiently the spontaneous refolding of chemically denatured proteins by forming high-affinity multidentate complexes with thiol and other functional groups (IC{sub 50} in the nanomolar range). With similar efficacy, the heavy metal ions inhibited the chaperone-assisted refolding of chemically denatured and heat-denatured proteins. Thus, the toxic effects of heavy metal ions may result as well from their interaction with the more readily accessible functional groups of proteins in nascent and other non-native form. The toxic scope of heavy metals seems to be substantially larger than assumed so far.

Sharma, Sandeep K. [Biochemisches Institut, Universitaet Zuerich, CH-8057 Zuerich (Switzerland); Departement de Biologie Moleculaire Vegetale, Universite de Lausanne, CH-1015 Lausanne (Switzerland); Goloubinoff, Pierre [Departement de Biologie Moleculaire Vegetale, Universite de Lausanne, CH-1015 Lausanne (Switzerland); Christen, Philipp [Biochemisches Institut, Universitaet Zuerich, CH-8057 Zuerich (Switzerland)], E-mail: christen@bioc.uzh.ch

2008-07-25T23:59:59.000Z

76

Metal Loaded Zeolite Adsorbents for Phosphine Removal  

Science Journals Connector (OSTI)

16,17 In the authors' prior study17 on adsorbing SiH4, the maximum adsorption capacity of only 0.15 mol of SiH4/mol of CuO was observed with 40% (w/w) CuO supported on Al2O3 adsorbents. ... It must be noted that an XPS analysis of the adsorbent right after adsorption was not possible due to safety concerns; the XPS data were performed on Cu/zeolite after adsorption and air purging to ensure full oxidization of the adsorbed PH3 on the metal/zeolite adsorbents. ... Activated C adsorbs AsH3 in an inert atm. ...

Wen-Chih Li; Hsunling Bai; Jung-Nan Hsu; Shou-Nan Li; Chienchih Chen

2008-01-23T23:59:59.000Z

77

ENVIRONMENTAL IMPACT OF HEAVY METAL POLLUTION IN NATURAL AQUATIC SYSTEMS  

E-Print Network [OSTI]

He who taught the use of the pen, Taught man that which he knew not" The distribution of heavy metals between soil and soil solutions is a key issue in evaluating the environmental impact of long term applications of heavy metals to land. Contamination of soils by heavy metals has been reported by many workers. Metal adsorption is affected by many factors, including soil pH, clay mineralogy, abundance of oxides and organic matter, soil composition and solution ionic strength. The pH is one of the many factors affecting mobility of heavy metals in soils and it is likely to be the most easily managed and the most significant. To provide the appropriate level of protection for aquatic life and other uses of the resource, it is important to be able to predict the environmental distribution of important metals on spatial and temporal scales and to do so with particular emphasis on the water column concentrations. Regulatory levels reflected in water quality criteria or standards are based on

Muhammad Rehan Tayab

78

Bead and Process for Removing Dissolved Metal Contaminants  

SciTech Connect (OSTI)

A bead is provided which comprises or consists essentially of activated carbon immobilized by crosslinked poly (carboxylic acid) binder, sodium silicate binder, or polyamine binder. The bead is effective to remove metal and other ionic contaminants from dilute aqueous solutions. A method of making metal-ion sorbing beads is provided, comprising combining activated carbon, and binder solution (preferably in a pin mixer where it is whipped), forming wet beads, and heating and drying the beads. The binder solution is preferably poly(acrylic acid) and glycerol dissolved in water and the wet beads formed from such binder solution are preferably heated and crosslinked in a convection oven.

Summers, Bobby L., Jr.; Bennett, Karen L.; Foster, Scott A.

2005-01-18T23:59:59.000Z

79

The effect of heavy metals on the activated sludge  

Science Journals Connector (OSTI)

The effect of heavy metal shock loading on biological treatment systems was studied by traditional methods and molecular biological techniques. Two kinds of SBR (sequence batch reactor) operation units, unacclimated and acclimated activated sludge systems, were studied. The addition of special nutrients and powdered activated carbon (PAC) to stimulate heavy metal uptake and recovery were studied. The kinetic constants could be used to describe the effect of the inhibition of substance utilisation. The results showed that heavy metal shock loading had a greater effect on the unacclimated activated sludge system than on the acclimated one. The special nutrients greatly enhanced the uptake of copper, and the PAC improved sludge settling and decreased the turbidity of the effluent. The variation of dominant species and the diversity of the bacterial community were analysed using 16S ribosomal DNA. Compared with the slight change of dominant species during acclimation by copper, there was a great change in the acclimated system shocked by a high concentration of copper. The results confirmed that the acclimation could improve the resistance of microorganisms to heavy metal toxicity.

B. Xie; K.S. Kang; E. Nakamura; K. Itoh

2002-01-01T23:59:59.000Z

80

THERMODYNAMIC STUDY OF HEAVY METALS BEHAVIOUR DURING MUNICIPAL WASTE INCINERATION  

E-Print Network [OSTI]

, heat and mass transfer, drying, pyrolysis, combustion of pyrolysis gases, combustion and gasificationTHERMODYNAMIC STUDY OF HEAVY METALS BEHAVIOUR DURING MUNICIPAL WASTE INCINERATION Y. ME´ NARD, A Me´tallurgie (LSG2M) Nancy, France T he incineration of municipal solid waste (MSW) contributes

Boyer, Edmond

Note: This page contains sample records for the topic "heavy metals removal" 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

Metagenomic Insights into Evolution of a Heavy Metal-Contaminated Groundwater Microbial Community  

E-Print Network [OSTI]

acetone). Finally, toxic heavy metal stress has resulted inby exporting toxic organics from the cell. (iv) Heavy metalheavy metal ions are relatively simple, typically involving: (a) conversion of the ion to a less toxic

Hemme, Christopher L.

2010-01-01T23:59:59.000Z

82

High efficiency particulate removal with sintered metal filters  

SciTech Connect (OSTI)

Because of their particle removal efficiencies and durability, sintered metal filters have been chosen for high efficiency particulate air (HEPA) filter protection in the off-gas treatment system for the proposed Idaho National Engineering Laboratory Transuranic Waste Treatment Facility. Process evaluation of sintered metal filters indicated a lack of sufficient process design data to ensure trouble-free operation. Subsequence pilot scale testing was performed with flyash as the test particulate. The test results showed that the sintered metal filters can have an efficiency greater than 0.9999999 for the specific test conditions used. Stable pressure drop characteristics were observed in pulsed and reversed flow blowback modes of operation. Over 4900 hours of operation were obtained with operating conditions ranging up to approximately 90/sup 0/C and 24 vol % water vapor in the gas stream.

Kirstein, B.E.; Paplawsky, W.J.; Pence, D.T.; Hedahl, T.G.

1981-01-01T23:59:59.000Z

83

Water Research 37 (2003) 43114330 A review of the biochemistry of heavy metal  

E-Print Network [OSTI]

of toxic heavy metals such as Cd2+ , Cu2+ , Zn2+ , Pb2+ , Cr3+ , and Hg2+ by inexpensive biomaterialsWater Research 37 (2003) 4311­4330 Review A review of the biochemistry of heavy metal biosorption and fucoidan, which are chiefly responsible for heavy metal chelation. In this comprehensive review

Long, Bernard

84

Heavy Metal Stress. Activation of Distinct Mitogen-Activated Protein Kinase Pathways  

E-Print Network [OSTI]

, 2003; Polle and Schu¨tzendu¨bel, 2003). Heavy metal toxicity comprises inactivation of biomole- culesHeavy Metal Stress. Activation of Distinct Mitogen-Activated Protein Kinase Pathways by Copper, Vienna Biocenter, A­1030 Vienna, Austria Excessive amounts of heavy metals adversely affect plant growth

Hirt, Heribert

85

Colonization of heavy metal polluted soils by Collembola: preliminary1 experiments in compartmented boxes2  

E-Print Network [OSTI]

1 Colonization of heavy metal polluted soils by Collembola: preliminary1 experiments;2 Keywords: Collembola, Acidophily, Heavy metals, Migration, Sensitivity.1 2 1. Introduction3 4 The sensitivity of Collembola (Hexapoda) to heavy metals has been the subject of recent5 investigations, pointing

Paris-Sud XI, Université de

86

Novel synthetic phytochelatin-based capacitive biosensor for heavy metal ion detection  

E-Print Network [OSTI]

to increasing levels of diverse pollutants. Heavy metals represent some of the most toxic ones not only to pollution by heavy metals, and is trying to remediate, control and minimize such pollution as muchNovel synthetic phytochelatin-based capacitive biosensor for heavy metal ion detection Ibolya

Chen, Wilfred

87

Macrobenthic Community in Tolo Harbour, Hong Kong and its Relations with Heavy Metals  

E-Print Network [OSTI]

the Pearson­Rosenberg model for succession along a pollution gradient. Keywords Macrobenthos . Heavy metalMacrobenthic Community in Tolo Harbour, Hong Kong and its Relations with Heavy Metals Kouping Chen study investigated the macrobenthic community in Tolo Harbour, Hong Kong, aiming at linking heavy metal

Jiao, Jiu Jimmy

88

Temporal variation of heavy metal contamination in fish of the river lot in southern France  

E-Print Network [OSTI]

July 2009 Keywords: Heavy metals Historical pollution Freshwater fish Muscle Liver Quality index a b of intense heavy metal pollution and has been the focus of studies dating back to the 1970s (Audry et al Lot is derived from anthropogenic origin. As such, the main sources of heavy metal pollution

Grenouillet, Gael

89

IMPACT OF HEAVY METALS IN SEWAGE SLUDGE ON SOIL AND PLANTS (COLZA and WHEAT)  

E-Print Network [OSTI]

IMPACT OF HEAVY METALS IN SEWAGE SLUDGE ON SOIL AND PLANTS (COLZA and WHEAT) Najla LASSOUED1@emse.fr Abstract We are testing the impact of heavy metals in sludge from urban and industrial wastewater treatment> Cu> Ni> Co> Cd The contents of heavy metals in the sludge is made very high and exceed European

Paris-Sud XI, Université de

90

Remediation of heavy-metal-contaminated soil using chelant extraction: Feasibility studies  

SciTech Connect (OSTI)

Results are presented of a laboratory investigation conducted to determine the efficacy of using chelating agents to extract heavy metals (Pb, Cd, Cr, Ba, Cu, and Zn) from soil, the primary focus being on the extraction of lead from the soil. Results from the batch-shaker studies and emphasizes the columnar extraction studies are described. The chelating agents studied included ethylenediaminetetraacetic acid (EDTA) and citric acid, in addition to water. Concentrations of the chelants ranged from 0.01 to 0.05 M; the suspension pH was varied between 3 and 8. Results showed that the removal of lead using citric acid and water was somewhat pH-dependent. For the batch-shaker studies, the results indicated that EDTA was more effective at removing Cd, Cu, Pb, and Zn than was citric acid (both present at 0.01 M). EDTA and citric acid were equally effective in mobilizing Cr and Ba from the soil. Heavy metals removal was slightly more effective in the more acidic region (pH {le} 5).

Peters, R.W.; Miller, G.; Taylor, J.D.; Schneider, J.F.; Zellmer, S.; Edgar, D.E.; Johnson, D.O.

1993-08-01T23:59:59.000Z

91

Pentek metal coating removal system: Baseline report; Summary  

SciTech Connect (OSTI)

The Pentek metal coating removal system consists of the ROTO-PEEN Scaler, CORNER-CUTTER(R), and VAC-PAC(R). The system is designed to remove coatings from steel, concrete, brick, and wood. The Scaler uses 3M ROTO-PEEN tungsten carbide cutters, while the CORNER-CUTTER(R) uses solid needles for descaling activities. These are used with the VAC-PAC(R) vacuum system to capture dust and debris as removal of the coating takes place. The safety and health evaluation during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure was minimal, but noise exposure was significant. Further testing for each exposure is recommended, since the outdoor environment where the testing demonstration took place may skew the results. It is feasible that dust and noise levels will be higher in an enclosed operating environment. Other areas of concern found were arm-hand vibration, whole-body vibration, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout.

NONE

1997-07-31T23:59:59.000Z

92

Chelant extraction and REDOX manipulation for mobilization of heavy metals from contaminated soils  

SciTech Connect (OSTI)

Was the result of open burning and open detonation of chemical agents and munitions in the Toxic Burning Pits area at J-Field, located in the Edgewood Area of Aberdeen Proving Ground in Harford County, Maryland, soils have been contaminated with heavy metals. Simultaneous extraction is complicated because of the multitude of contaminant forms that exist. This paper uses data from a treatability study performed at Argonne National Laboratory to discuss and compare several treatment methods that were evaluated for remediating metals-contaminated soils. J-Field soils were subjected to a series of treatability experiments designed to determine the feasibility of using soil washing/soil flushing, enhancements to soil washing/soil flushing, solidification/stabilization, and electrokinetics for remediating soils contaminated with metals. Chelating and mobilizing agents evaluated included ammonium acetate, ethylenediaminetetraacetic acid, citric acid, Citranox, gluconic acid, phosphoric acid, oxalic acid, and nitrilotriacetic acid, in addition to pH-adjusted water. REDOX manipulation can maximize solubilities, increase desorption, and promote removal of heavy metal contaminants. Reducing agents that were studied included sodium borohydride, sodium metabisulfite, and thiourea dioxide. The oxidants studied included hydrogen peroxide, sodium percarbonate, sodium hypochlorite, and potassium permanganate. This paper summaries the results from the physical/chemical characterization, soil washing/soil flushing, and enhancements to soil washing/soil flushing portions of the study.

Brewster, M.D.; Peters, R.W.; Miller, G.A.; Patton, T.L.; Martino, L.E.

1994-12-01T23:59:59.000Z

93

Water treatment process and system for metals removal using Saccharomyces cerevisiae  

DOE Patents [OSTI]

A process and a system for removal of metals from ground water or from soil by bioreducing or bioaccumulating the metals using metal tolerant microorganisms Saccharomyces cerevisiae. Saccharomyces cerevisiae is tolerant to the metals, able to bioreduce the metals to the less toxic state and to accumulate them. The process and the system is useful for removal or substantial reduction of levels of chromium, molybdenum, cobalt, zinc, nickel, calcium, strontium, mercury and copper in water.

Krauter, Paula A. W. (Livermore, CA); Krauter, Gordon W. (Livermore, CA)

2002-01-01T23:59:59.000Z

94

Sorption kinetic studies using metal chelate embedded polymers for recovery of heavy metals from desalination effluents  

Science Journals Connector (OSTI)

The heavy metals, such as uranium and vanadium, are some of the valuable metals in desalination effluents. Metal Chelate Embedded Polymers (MCEP) in leaflet form were prepared using the post-irradiation induced graft polymerisation technique, with different non-woven thermally bonded fibrous substrate materials. The novel sorbents, synthesised by using accelerator energy beams of 1.25 MeV and 2 MeV, were characterised for their radiation, chemical and mechanical characteristics. The novel sorbent was evaluated under different parametric conditions, in order to study the influence of grafting levels, initial concentration, dissolved solids and contact time. The standard isotherm and diffusion models were fitted to the experimental sorption data and model parameters were evaluated. The sorption characteristics of MCEP for recovery of heavy metals such as uranium and vanadium from desalination effluents were investigated.

T.L. Prasad; P.K. Tewari; D. Sathiyamoorthy

2011-01-01T23:59:59.000Z

95

Effects of thermal pretreatment (removal of steric hindrance) on subsequent nuclear hydrogenation of heavy alkylaromatics  

SciTech Connect (OSTI)

The changes in structures by thermal pretreatment of heavy alkylaromatics, which are very difficult to nuclear hydrogenate, and the effects of the pretreatment on subsequent nuclear hydrogenation were investigated in comparison with catalytic pretreatment of the same feedstock. The following results were obtained: (1) the structures of the thermally pretreated products are quite different from those of the catalytically pretreated ones; (2) subsequent nuclear hydrogenation of the thermally pretreated products becomes much easier because the steric hindrance is removed; (3) in the case where the same feedstock was catalytically pretreated, the products were difficult to nuclear hydrogenate. These results suggest various applications, including heavy oil hydrotreating.

Kubo, Junichi [Nippon Oil Co., Ltd., Yokohama (Japan). Central Technical Research Lab.] [Nippon Oil Co., Ltd., Yokohama (Japan). Central Technical Research Lab.

1996-01-01T23:59:59.000Z

96

Water-soluble organophosphorus reagents for mineralization of heavy metals.  

SciTech Connect (OSTI)

In this report, we have described the principal stages of a two-step process for the in-situ stabilization of actinide ions in the environment. The combination of cation exchange and mineralization appears likely to provide a long-term solution to environments contaminated with heavy metals. Relying on a naturally occurring sequestering agent has obvious potential advantages from a regulatory standpoint. There are additional aspects of this technology requiring further elucidation, including the demonstration of the effect of these treatment protocols on the geohydrology of soil columns, further examination of the influence of humates and other colloidal species on cation uptake, and microbiological studies of phytate hydrolysis. We have learned during the course of this investigation that phytic acid is potentially available in large quantities. In the US alone, phytic acid is produced at an annual rate of several hundred thousand metric tons as a byproduct of fermentation processes (11). This material presently is not isolated for use. Instead, most of the insoluble phyate (as phytin) is being recycled along with the other solid fermentation residues for animal feed. This material is in fact considered undesirable in animal feed. The details of possible separation processes for phytate from these residues would have to be worked out before this untapped resource would be available for application to heavy metal sequestration. The results described emphasize the behavior of actinide and trivalent lanthanide metal ions, as these species are of primary interest to the Department of Energy for the cleanup of the former nuclear weapons production complex. While the specific demonstration includes this limited selection of metal ions, the technique should be readily applicable to any class of metal ions that form insoluble phosphate compounds under appropriate conditions. Further, though this demonstration has been conducted in the pH 5-8 range, it is conceivable that the basic concepts would apply equally well for the stabilization of waste metals in mill tailings piles, wherein conditions can be moderately acidic.

Nash, K. L.

1999-02-26T23:59:59.000Z

97

Micellar enhanced ultrafiltration of heavy metals using lecithin  

E-Print Network [OSTI]

, zinc, silver, copper, and mercury are reported to be above 98%. Chaufer and Deratiani presented complexation-ultrafiltration as a means of removing metal ions with water soluble macromolecules (13). Polymers which are known to bind to metals... from each of the seven characteristic wastewaters and the average percentage of plants that generate such wastes. Table 4. Wastewater Distribution (2). Percentage of plants ihthi wa ew t 100. 0 6. 3 n/a 24. 1 13. 9 12. 9 n/a Percentage...

Ahmadi, Saman Nameghi

1992-01-01T23:59:59.000Z

98

Integrated Remediation Process for a High Salinity Industrial Soil Sample Contaminated with Heavy Oil and Metals  

Science Journals Connector (OSTI)

A highly saline industrial soil sample contaminated with heavy oils and several heavy metals, was tested for remediation using NRCs Solvent Extraction Soil Remediation (SESR) process. The sample was provided ...

Abdul Majid; Bryan D. Sparks

2002-01-01T23:59:59.000Z

99

Short Communication Kinetics and thermodynamics of heavy metal ions sequestration onto novel  

E-Print Network [OSTI]

biomasses had been chosen and utilized by researchers to sequester toxic heavy metal ions from industrialShort Communication Kinetics and thermodynamics of heavy metal ions sequestration onto novel is generally considered as the most toxic metal in natural ecosystems (Clarkson, 1993). Over the years, various

Gong, Jian Ru

100

Environmental Pollution (Series B) 6 (1983)309-318 Heavy Metals in the Centipede Lithobius variegatus  

E-Print Network [OSTI]

Environmental Pollution (Series B) 6 (1983)309-318 Heavy Metals in the Centipede Lithobius) may accumulate considerable amounts of heavy metals. These authors have suggested that the high concentrations of metals in these animals may have detrimental effects on predators. However, 309 Environ. Pollut

Hopkin, Steve

Note: This page contains sample records for the topic "heavy metals removal" 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

Heavy metals in wild rice from northern Wisconsin  

Science Journals Connector (OSTI)

Wild rice grain samples from various parts of the world have been found to have elevated concentrations of heavy metals, raising concern for potential effects on human health. It was hypothesized that wild rice from north-central Wisconsin could potentially have elevated concentrations of some heavy metals because of possible exposure to these elements from the atmosphere or from water and sediments. In addition, no studies of heavy metals in wild rice from Wisconsin had been performed, and a baseline study was needed for future comparisons. Wild rice plants were collected from four areas in Bayfield, Forest, Langlade, Oneida, Sawyer and Wood Counties in September, 1997 and 1998 and divided into four plant parts for elemental analyses: roots, stems, leaves and seeds. A total of 194 samples from 51 plants were analyzed across the localities, with an average of 49 samples per part depending on the element. Samples were cleaned of soil, wet digested, and analyzed by ICP for Ag, As, Cd, Cr, Cu, Hg, Mg, Pb, Se and Zn. Roots contained the highest concentrations of Ag, As, Cd, Cr, Hg, Pb, and Se. Copper was highest in both roots and seeds, while Zn was highest just in seeds. Magnesium was highest in leaves. Seed baseline ranges for the 10 elements were established using the 95% confidence intervals of the medians. Wild rice plants from northern Wisconsin had normal levels of the nutritional elements Cu, Mg and Zn in the seeds. Silver, Cd, Hg, Cr, and Se were very low in concentration or within normal limits for food plants. Arsenic and Pb, however, were elevated and could pose a problem for human health. The pathway for As, Hg and Pb to the plants could be atmospheric.

James P. Bennett; Esteban Chiriboga; John Coleman; Donald M. Waller

2000-01-01T23:59:59.000Z

102

E-Print Network 3.0 - avoid heavy metals Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

c Springer 2006 Summary: Springer 2006 AVAILABILITY AND ASSESSMENT OF FIXING ADDITIVES FOR THE IN SITU REMEDIATION OF HEAVY METAL... amendments for the in situ...

103

Impact of Sediment Resuspension Events on the Availability of Heavy Metals in Freshwater Sediments.  

E-Print Network [OSTI]

??Release of heavy metals during sediment resuspension is an understudied problem that may be cause for environmental concern. Common activities such as shipping and dredging (more)

Eggleston, Michael

2012-01-01T23:59:59.000Z

104

E-Print Network 3.0 - assess heavy metals Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Submitted to Summary: and organic pollutants that include heavy metals, PAHs, PCBs, dioxins, and furans that have deleterious... environmental effects. For example, sediment...

105

Practical Materials for Heavy Metal Ion Chelation: PolyethylenimPractical Materials for Heavy Metal Ion Chelation: Polyethyleniminesines tailored onto The Surface oftailored onto The Surface of Porous SilicaPorous Silica  

E-Print Network [OSTI]

Practical Materials for Heavy Metal Ion Chelation: PolyethylenimPractical Materials for Heavy Metal *presenting author INTRODUCTION As a result of heavy metal ion release from industrial wastewater, water pollution has become a serious problem. Waste streams contain solutions of metal ions, such as copper

Taralp, Alpay

106

Industrial Waster Conference, WEF. San Antonio. 2003. METALS REMOVAL TECHNOLOGIES FOR STORMWATER  

E-Print Network [OSTI]

Industrial Waster Conference, WEF. San Antonio. 2003. 1 METALS REMOVAL TECHNOLOGIES FOR STORMWATER. Additionally determining the range of metal concentrations of the runoff to be treated is crucial to selecting the best media, since the removal efficiencies of the media relative to each other changed with varying

Pitt, Robert E.

107

Effect of the militarily-relevant heavy metals, depleted uranium and heavy metal tungsten-alloy on gene expression in human liver carcinoma cells (HepG2)  

Science Journals Connector (OSTI)

Depleted uranium (DU) and heavy-metal tungsten alloys ... in military applications. Chemically similar to natural uranium, but depleted of the higher activity 235U and 234U...in vitro. Using insoluble DU-UO2 and ...

Alexandra C. Miller; Kia Brooks; Jan Smith

2004-01-01T23:59:59.000Z

108

Heavy Metal Contaminated Sediments of Lower Passaic River, New Jersey USA Victor Onwueme1  

E-Print Network [OSTI]

Heavy Metal Contaminated Sediments of Lower Passaic River, New Jersey USA Victor Onwueme1 , Huan benchmarks and probable ecological stressors. Heavy metals remains chemicals of concern in the Passaic River of toxic chemicals throughout the river, whose concentrations greatly exceed the sediment quality

Brookhaven National Laboratory

109

Heavy Metals contamination in two bioluminescent bays of Puerto Rico Yadira Soto Viruet  

E-Print Network [OSTI]

1 Heavy Metals contamination in two bioluminescent bays of Puerto Rico Yadira Soto Viruet #802 characteristics. The main purpose of this research was to evaluate the presence of heavy metals of pesticides for agriculture, untreated wastewater and variety of industrial activities (power plants, oil

Gilbes, Fernando

110

Development of protein based bioremediation and drugs for heavy metal toxicity  

SciTech Connect (OSTI)

Structural studies were performed on several proteins of the bacterial detoxification system. These proteins are responsible for binding (MerP) and transport of heavy metals, including mercury, across membranes. The structural information obtained from NMR experiments provides insight into the selectivity and sequestration processes towards heavy metal toxins.

Opella, Stanley J.

2001-09-18T23:59:59.000Z

111

Portable X-Ray, K-Edge Heavy Metal Detector  

SciTech Connect (OSTI)

The X-Ray, K-Edge Heavy Metal Detection System was designed and built by Ames Laboratory and the Center for Nondestructive Evaluation at Iowa State University. The system uses a C-frame inspection head with an X-ray tube mounted on one side of the frame and an imaging unit and a high purity germanium detector on the other side. the inspection head is portable and can be easily positioned around ventilation ducts and pipes up to 36 inches in diameter. Wide angle and narrow beam X-ray shots are used to identify the type of holdup material and the amount of the contaminant. Precise assay data can be obtained within minutes of the interrogation. A profile of the containerized holdup material and a permanent record of the measurement are immediately available.

Fricke, V.

1999-10-25T23:59:59.000Z

112

Uranium and other heavy metals in the plant-animal-human food chain near abandoned mining sites and structures in an American Indian community in northwestern New Mexico  

E-Print Network [OSTI]

agent (U and other heavy metal toxicants). The environmentM=6.59, SD=3.87). The heavy metal toxicity levels for sheepFor Sheep 1, heavy metal water toxicity levels were not

Samuel-Nakamura, Christine

2013-01-01T23:59:59.000Z

113

Dendrochronology and heavy metal depsosition in tree rings of baldcypress  

SciTech Connect (OSTI)

A chronology (1895-present) based on tree-ring increments was constructed for baldcypress (Taxodium distichum L.) trees in Bayou Trepagnier, in southern Louisiana. The best indicator of growth was precipitation in February of the preceding year and October of the 2 previous years. Crossdated cores were used to reconstruct large historical natural environmental perturbations (hurricanes). Heavy metals and organic pollutants from oil refineries and other sources contaminated the bayou commencing in the early 1900s. The Pb and Zn content of 50 trees along Bayou Trepagnier, analyzed in the growth rings of tree cores using x-ray fluorescent spectrometry, produced an historical record of pollution. Highlevels of contamination of Pb, as well as Zn, could be correlated with establishment of petroleum refineries (1916) and dredging (1930-1950) of the area, which created spoil banks containing high levels (ca. 300-1600 mg/kg [ppm] Pb) of heavy metals. Concentrations of Pb, per tree, ranged form 0.6 to 14 mg/kg (ppm). Trees in the upper protion of the bayou (near the refiney) contained an average of 4.5 mg/kg (ppm) Pb; trees in the lower portion averaged 2.2 mg/kg (ppm). Concentrations of Zn per tree ranged from 1.7 to 14.8 mg/kg (ppm), but in contrast with Pb did not correlate with distance from pollution sources; trees averaged 5.5 and 5.4 mg/kg (ppm) Zn in the upper and lower portions, respectively, of Bayou Trepagnier. Levels of Pb and Zn in a control ecosystem, Stinking Bayou, were 1.0 and 5.2 mg/kg (ppm), respectively. 39 refs., 7 figs., 2 tabs.

Latimer, S.D.; Ellgaard, E.G.; Kumar, S.D. [Tulane Univ., New Orleans, LA (United States)] [and others

1996-11-01T23:59:59.000Z

114

INTERPRETING THE RESULTS OF SOIL TESTS FOR HEAVY METALS Vern Grubinger and Don Ross, University of Vermont  

E-Print Network [OSTI]

toxicity of a heavy metal will be affected by soil texture, organic matter, and pH. The health effects1 INTERPRETING THE RESULTS OF SOIL TESTS FOR HEAVY METALS Vern Grubinger and Don Ross, University of Vermont Agricultural soils normally contain low background levels of heavy metals. Contamination from

Hayden, Nancy J.

115

Environmental Pollution (Series B) 9 (1985) 239-254 Heavy Metals in Isopods from the Supra-littoral Zone  

E-Print Network [OSTI]

Environmental Pollution (Series B) 9 (1985) 239-254 Heavy Metals in Isopods from the Supra were very small. The hepatopancreas was the most important storage organ oj'heavy metals and, at all of heavy metals were compared in the tissues oiL. oceanica and in two 'more terrestrial' isopods, Oniscus

Hopkin, Steve

116

Heavy metals in water base drilling muds used in several locations of oil fields in Indonesia  

SciTech Connect (OSTI)

Heavy metals are parameters to be considered among other parameters such as pH, salts, hydrocarbons, cutting and fluids when water base muds are to be disposed. In most cases reducing or eliminating heavy metals, either as additives or contaminants, will reduce the problems associated with disposal. Even if all heavy metals are eliminated from the additives placed in a mud system, however, these contaminants can still become incorporated into the mud from the formation that is being drilled. In Indonesia, drilling muds are classified as hazardous material according to the Governmental Regulation PP 19/1994. This paper try to investigate the concentration of some of heavy metals in drilling muds used in several locations of oil fields in Indonesia using Toxicity Characteristic Leaching Procedure (TCLP) extracted with several acids and other extracting agents. {open_quotes}Total heavy metals{close_quotes} content as released through refluxing in strong acids are also determined to correlate between Total Heavy Metals and Extractable Heavy Metals, in order to examine the type of compounds which could be considered as potential pollutants.

Mulyono, M.; Desrina, R.; Priatna, R. [and others

1996-12-31T23:59:59.000Z

117

Ecological risk of heavy metal hotspots in topsoils in the Province of Golestan, Iran  

Science Journals Connector (OSTI)

Abstract Human activities, such as agriculture or mining, are a continuous source of risk for heavy metal pollution that seriously disturbs the soil environment. Massive efforts are being made to identify the tools to determine indicators of soil quality condition. This study characterises and evaluates the heavy metal (Cd, Cu, Ni, Pb and Zn) contents in the Province of Golestan (northern Iran). Pollution was assessed using the pollution index (PI) and the integrated pollution index (IPI). The potential harmful effects of these heavy metals were evaluated by the Potential Ecological Risk Index (PERI) Method. Kernel density estimation (KDE) and Local Moran's I were used for the hotspot analysis of soil pollution from a set of observed hazard occurrences. In all, 346 topsoils were examined, which represent three areas, approximately including the middle-south, west and north-east areas in this region. The heavy metal concentrations in the analysed samples did not generally present high values, despite anthropic heavy metal input. However, the potential ecological risk indexes (RI) indicated that approximately 68% and 5% of the study samples had medium and high pollution levels, respectively. Multiple hotspots for the above five heavy metals were located in the middle-south and west study areas. This anthropic heavy metal input is related to mining, agricultural practices and vehicle emissions. It was concluded that a moderate and high potential ecological risk covered about 90% of this province. In contrast, the natural origin input became more marked on a long spatial scale.

Rouhollah Mirzaei; Hadi Ghorbani; Naser Hafezi Moghaddas; Jos Antonio Rodrguez Martn

2014-01-01T23:59:59.000Z

118

Removal and recovery of metal ions from process and waste streams using polymer filtration  

SciTech Connect (OSTI)

Polymer Filtration (PF) is an innovative, selective metal removal technology. Chelating, water-soluble polymers are used to selectively bind the desired metal ions and ultrafiltration is used to concentrate the polymer-metal complex producing a permeate with low levels of the targeted metal ion. When applied to the treatment of industrial metal-bearing aqueous process streams, the permeate water can often be reused within the process and the metal ions reclaimed. This technology is applicable to many types of industrial aqueous streams with widely varying chemistries. Application of PF to aqueous streams from nuclear materials processing and electroplating operations will be described.

Jarvinen, G.D.; Smith, B.F.; Robison, T.W.; Kraus, K.M.; Thompson, J.A.

1999-06-13T23:59:59.000Z

119

Heavy Metal Tolerance in Stenotrophomonas maltophilia Delphine Pages1,2,3  

E-Print Network [OSTI]

Heavy Metal Tolerance in Stenotrophomonas maltophilia Delphine Pages1,2,3 , Jerome Rose4 , Sandrine, this bacterium tolerates high levels (0.1 to 50 mM) of various toxic metals, such as Cd, Pb, Co, Zn, Hg, Ag mechanisms to overcome metal toxicity, reduction of oxyanions to non-toxic elemental ions and detoxification

Paris-Sud XI, Université de

120

Layered metal sulfides: Exceptionally selective agents for radioactive strontium removal  

Science Journals Connector (OSTI)

...07 mmol, 40 mg) in water (20 ml), an excess...washed several times with water, acetone, and...Complex Environmental Remediation Problems , ed Blacklick...removal from contaminated ground water and wastewater...

Manolis J. Manos; Nan Ding; Mercouri G. Kanatzidis

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Determining the Heavy Metal Pollution in Mascara (Algeria) by Using Casuarina equisetifolia  

E-Print Network [OSTI]

Abstract. In this study, Casuarina equisetifolia needles were evaluated as the possible biomonitors of heavy metal air pollution in Mascara (Algeria). The needles were sampled from seven locations with different degrees of metal pollution (near roads) and from a control site. The concentrations of lead, zinc, copper and nickel were measured by using a flame atomic absorption spectrophotometer. The maximal values of these four metals were found in the samples collected near the roads and the minimal values were found in the control site. Furthermore, sites with high traffic density and frequency of cars stoppage showed high heavy metal concentrations. However, the comparison of concentrations of all metals showed that the zinc one had the highest concentration of all. The cluster analysis divided the selected sampling sites in three distinct clusters. With regard to the results of this study, Casuarina equisetifolia can be successfully applied in biomonitoring of air pollution. Key words: Casuarina equisetifolia, Mascara, biomonitors, pollution, heavy metals.

Lakhdari Aissa; Benabdeli Kloufi

122

Sequential precipitation of a new goethite-calcite nanocomposite and its1 possible application in the removal of toxic ions from polluted water2  

E-Print Network [OSTI]

neutralise acidic wastewater by slight calcite dissolution, enhancing the removal of heavy20 metals (e.g. Cu: Goethite; Calcite; Nanocomposite; Precipitation; Removal; Metalloids;1 Heavy metals2 3 4 5 6 7 8 9 10 11 12 a major role in the fate and transport of several6 metalloids and heavy metal trace elements and organic

Paris-Sud XI, Université de

123

Effects of residues from municipal solid waste landfill on corn yield and heavy metal content  

SciTech Connect (OSTI)

The effects of residues from municipal solid waste landfill, Khon Kaen Municipality, Thailand, on corn (Zea mays L.) yield and heavy metal content were studied. Field experiments with randomized complete block design with five treatments (0, 20, 40, 60 and 80% v/v of residues and soil) and four replications were carried out. Corn yield and heavy metal contents in corn grain were analyzed. Corn yield increased by 50, 72, 85 and 71% at 20, 40, 60 and 80% treatments as compared to the control, respectively. All heavy metals content, except cadmium, nickel and zinc, in corn grain were not significantly different from the control. Arsenic, cadmium and zinc in corn grain were strongly positively correlated with concentrations in soil. The heavy metal content in corn grain was within regulated limits for human consumption.

Prabpai, S. [Suphan Buri Campus Establishment Project, Kasetsart University, 50 U Floor, Administrative Building, Paholyothin Road, Jatujak, Bangkok 10900 (Thailand)], E-mail: s.prabpai@hotmail.com; Charerntanyarak, L. [Department of Epidemiology, Faculty of Public Health, Khon Kaen University, Khon Kaen 40002 (Thailand)], E-mail: lertchai@kku.ac.th; Siri, B. [Department of Agronomy, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002 (Thailand)], E-mail: boonmee@kku.ac.th; Moore, M.R. [The University of Queensland, The National Research Center for Environmental Toxicology, 39 Kessels Road, Coopers Plans, Brisbane, Queensland 4108 (Australia)], E-mail: m.moore@uq.edu.au; Noller, Barry N. [The University of Queensland, Centre for Mined Land Rehabilitation, Brisbane, Queensland 4072 (Australia)], E-mail: b.noller@uq.edu.au

2009-08-15T23:59:59.000Z

124

Heavy metal pollution in the territory of Chelyabinsk upon coal combustion  

Science Journals Connector (OSTI)

The pollution of the territory of Chelyabinsk by heavy metals (Cu, Co, Ni, Zn, Pb, Cd, Cr, Mo, and Hg) upon coal combustion is evaluated. The concentrations of Zn, Pb, Cd, and Hg in the soils of this territory...

R. V. Galiulin; R. A. Galiulina

2013-03-01T23:59:59.000Z

125

Heavy-Metal Stress and Developmental Patterns of Arbuscular Mycorrhizal Fungi  

Science Journals Connector (OSTI)

...in large-scale atmospheric pollution of the northern hemisphere...1997. Effect of heavy metal pollution on mycorrhizal colonization...Effect of vehicular lead pollution on phylloplane mycoflora...microorganisms and invertebrates. Water Air Soil Pollut. 47: 189-215...

Teresa E. Pawlowska; Iris Charvat

2004-11-01T23:59:59.000Z

126

Mineral surfaces and bioavailability of heavy metals: A molecular-scale perspective  

Science Journals Connector (OSTI)

...prioritize remediation efforts and to...example, waterrock interactions...approach are remediation efforts and...in drinking water in Bangladesh...prioritize remediation efforts and...geochemistry ground water heavy metals...

Gordon E. Brown; Jr.; Andrea L. Foster; John D. Ostergren

1999-01-01T23:59:59.000Z

127

Statistical Analysis Of Heavy Metals Concentration In Watermelon Plants Irrigated By Wastewater  

Science Journals Connector (OSTI)

Concentration of heavy metals in vegetables irrigated by urban wastewater is a cause of serious concern due to the potentials health problems of consuming contaminated produce. In this study it is tried to model the concentration of heavy metals (Cd Cr Cu Fe ) as a function of their concentration in watermelon roots and stems. Our study shows there is a good relationship between them for most of collected data. By measuring the concentration in root and stem of watermelon plant samples before harvesting the concentration of heavy metal in watermelon's fruit can be estimated by presented mathematical models. This study shows the concentrations of heavy metals in fruits roots and stems of watermelon plants are very high and in dangerous level when irrigated by municipal waste water.

M. J. Khanjani; A. A. Maghsoudi moud; V. R. Saffari; S. M. Hashamipor; M. Soltanizadeh

2008-01-01T23:59:59.000Z

128

E-Print Network 3.0 - aquatic heavy metals Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Principles of Ecotoxicology, SCOPE Report 12, Chapter 11, pp 239-255. Heavy metals, Pollutants, Toxicity... fIJJ US Army Corps of Engineers AQUATIC PLANT CONTROL RESEARCH PROGRAM...

129

The Effects of Heavy Metals (other than Mercury) on Marine and Estuarine Organisms  

Science Journals Connector (OSTI)

...of heavy metals is described in terms of their absorption, storage, excretion and regulation when different concentrations are...Industrial Waste Lead toxicity Marine Biology Mollusca drug effects Seawater Sewage Water Pollution Zinc toxicity The Royal Society is collaborating...

1971-01-01T23:59:59.000Z

130

Pentek metal coating removal system: Baseline report; Greenbook (chapter)  

SciTech Connect (OSTI)

The Pentek coating removal technology was tested and is being evaluated at Florida International University (FIU) as a baseline technology. In conjunction with FIU`s evaluation of efficiency and cost, this report covers evaluation conducted for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The Pentek coating removal system consisted of the ROTO-PEEN Scaler, CORNER-CUTTER{reg_sign}, and VAC-PAC{reg_sign}. They are designed to remove coatings from steel, concrete, brick, and wood. The Scaler uses 3M Roto Peen tungsten carbide cutters while the CORNER-CUTTER{reg_sign} uses solid needles for descaling activities. These hand tools are used with the VAC-PAC{reg_sign} vacuum system to capture dust and debris as removal of the coating takes place. The safety and health evaluation during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure minimal, but noise exposure was significant. Further testing for each exposure is recommended because of the environment where the testing demonstration took place. It is feasible that the dust and noise levels will be higher in an enclosed operating environment of different construction. In addition, other areas of concern found were arm-hand vibration, whole-body, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout.

NONE

1997-07-31T23:59:59.000Z

131

The role of mycorrhizal fungi in the uptake of heavy metals by Salix. A preproposal for the McIntire-Stennis Research Program  

E-Print Network [OSTI]

, either to protect the willow against heavy metal toxicity, or to sequester the heavy metals fromThe role of mycorrhizal fungi in the uptake of heavy metals by Salix. A preproposal for the Mc fungi produce bioactive peptides (e.g. siderophores or phytochelatins) in response to heavy metal stress

Chatterjee, Avik P.

132

TO THE 1979 CONVENTION ON LONG-RANGE TRANSBOUNDARY AIR POLLUTION ON HEAVY METALS The Parties,  

E-Print Network [OSTI]

Determined to implement the Convention on Long-range Transboundary Air Pollution, Concerned that emissions of certain heavy metals are transported across national boundaries and may cause damage to ecosystems of environmental and economic importance and may have harmful effects on human health, Considering that combustion and industrial processes are the predominant anthropogenic sources of emissions of heavy metals into the atmosphere, Acknowledging that heavy metals are natural constituents of the Earth's crust and that many heavy metals in certain forms and appropriate concentrations are essential to life, Taking into consideration existing scientific and technical data on the emissions, geochemical processes, atmospheric transport and effects on human health and the environment of heavy metals, as well as on abatement techniques and costs, Aware that techniques and management practices are available to reduce air pollution caused by the emissions of heavy metals, Recognizing that countries in the region of the United Nations Economic Commission for Europe (UNECE) have different economic conditions, and that in certain countries the economies are in transition,

unknown authors

133

High Pressure Phase Transformations in Heavy Rare Earth Metals and Connections to Actinide Crystal Structures  

SciTech Connect (OSTI)

High-pressure studies have been performed on heavy rare earth metals Terbium (Tb) to 155 GPa and Holmium (Ho) to 134 GPa in a diamond anvil cell at room temperature. The following crystal structure sequence was observed in both metals hcp {yields} Sm-type {yields} dhcp {yields} distorted fcc (hR-24) {yields} monoclinic (C2/m) with increasing pressure. The last transformation to a low symmetry monoclinic phase is accompanied by a volume collapse of 5 % for Tb at 51 GPa and a volume collapse of 3 % for Ho at 103 GPa. This volume collapse under high pressure is reminiscent of f-shell delocalization in light rare earth metal Cerium (Ce), Praseodymium (Pr), and heavy actinide metals Americium (Am) and Curium (Cm). The orthorhombic Pnma phase that has been reported in Am and Cm after f-shell delocalization is not observed in heavy rare earth metals under high pressures. (authors)

Vohra, Yogesh K.; Sangala, Bagvanth Reddy; Stemshorn, Andrew K. [Physics, University of Alabama at Birmingham (UAB), 310 Campbell Hall, 1300 University Boulevard, Birmingham, AL, 35294-1170 (United States); Hope, Kevin M. [Biology, Chemistry, and Mathematics, University of Montevallo, Harman Hall, Station 6480, Montevallo, AL, 35115 (United States)

2008-07-01T23:59:59.000Z

134

Effects of maternal exposure to six heavy metals on fetal development  

SciTech Connect (OSTI)

The authors previously studied the relationship of seven heavy metals between maternal and fetal samples collected from normal pregnant Japanese women and positive correlations of mercury, lead(Pb), cadmium(Cd), and manganese(Mn) contents were found between maternal and cord blood whereas they were not found as to essential metals such as copper (Cu), zinc(Zn) and iron(Fe), they pointed out the more serious influence of heavy metals on the neonates than on their mothers as the results of both the higher contents and the correlative behavior of toxic metals in cord blood. In the present investigation, an attempt has been made to ascertain the maternofetal relationship found in the human pregnancy by the use of experimental animals as the first step of the study on the fetotoxicity resulted from the maternal exposure to combined heavy metals.

Tsuchiya, H.; Shima, S.; Kurita, H.; Ito, T.; Kato, Y.; Kato, Y.; Tachikawa, S.

1987-04-01T23:59:59.000Z

135

CHANGING THE LANDSCAPE--LOW-TECH SOLUTIONS TO THE PADUCAH SCRAP METAL REMOVAL PROJECT ARE PROVIDING SAFE, COST-EFFECTIVE REMEDIATION OF CONTAMINATED SCRAP YARDS  

SciTech Connect (OSTI)

Between 1974 and 1983, contaminated equipment was removed from the Paducah Gaseous Diffusion Plant (PGDP) process buildings as part of an enrichment process upgrade program. The upgrades consisted of the dismantlement, removal, and on-site storage of contaminated equipment, cell components, and scrap material (e.g., metal) from the cascade facilities. Scrap metal including other materials (e.g., drums, obsolete equipment) not related to this upgrade program have thus far accumulated in nine contiguous radiologically-contaminated and non-contaminated scrap yards covering 1.05E5 m2 (26 acres) located in the northwestern portion of the PGDP. This paper presents the sequencing of field operations and methods used to achieve the safe removal and disposition of over 47,000 tonnes (53,000 tons) of metal and miscellaneous items contained in these yards. The methods of accomplishment consist of mobilization, performing nuclear criticality safety evaluations, moving scrap metal to ground level, inspection and segregation, sampling and characterization, scrap metal sizing, packaging and disposal, and finally demobilization. Preventing the intermingling of characteristically hazardous and non-hazardous wastes promotes waste minimization, allowing for the metal and materials to be segregated into 13 separate waste streams. Low-tech solutions such as using heavy equipment to retrieve, size, and package scrap materials in conjunction with thorough planning that integrates safe work practices, commitment to teamwork, and incorporating lessons learned ensures that field operations will be conducted efficiently and safely.

Watson, Dan; Eyman, Jeff

2003-02-27T23:59:59.000Z

136

Method for removing metal vapor from gas streams  

DOE Patents [OSTI]

A process for cleaning an inert gas contaminated with a metallic vapor, such as cadmium, involves withdrawing gas containing the metallic contaminant from a gas atmosphere of high purity argon; passing the gas containing the metallic contaminant to a mass transfer unit having a plurality of hot gas channels separated by a plurality of coolant gas channels; cooling the contaminated gas as it flows upward through the mass transfer unit to cause contaminated gas vapor to condense on the gas channel walls; regenerating the gas channels of the mass transfer unit; and, returning the cleaned gas to the gas atmosphere of high purity argon. The condensing of the contaminant-containing vapor occurs while suppressing contaminant particulate formation, and is promoted by providing a sufficient amount of surface area in the mass transfer unit to cause the vapor to condense and relieve supersaturation buildup such that contaminant particulates are not formed. Condensation of the contaminant is prevented on supply and return lines in which the contaminant containing gas is withdrawn and returned from and to the electrorefiner and mass transfer unit by heating and insulating the supply and return lines.

Ahluwalia, R. K. (6440 Hillcrest Dr., Burr Ridge, IL 60521); Im, K. H. (925 Lehigh Cir., Naperville, IL 60565)

1996-01-01T23:59:59.000Z

137

Effect of heavy metals ions on enzyme activity in the Mediterranean mussel, Donax trunculus  

SciTech Connect (OSTI)

Heavy metal ions strongly are bound by sulfhydryl groups of proteins. Sulfhydryl binding changes the structure and enzymatic activities of proteins and causes toxic effects evident at the whole organism level. Heavy metal ions like Cd, Cu, Hg, Zn, and Pb in sufficiently high concentrations might kill organisms or cause other adverse effects that changing aquatic community structures. Bivalves are known to be heavy metal accumulators. The aim of the present study was to examine the effects of different concentrations of each of five heavy metal ions on the activity of four enzymes in D. trunculus. As it is known that heavy metals inhibit the activity of a wide range of enzymes, the authors chose representative examples of dehydrogenases (lactate and malate dehydrogenases), respiratory enzyme (cytochrome oxidase) and digestive enzyme ({alpha}-amylase). The acute effects of different concentrations of selected metals were examined. These concentrations were higher than those found usually in the locality where the animals occur, but might be encountered during a given event of pollution.

Mizrahi, L.; Achituv, Y. (Bar Ilan Univ., Ramat-Gan (Israel))

1989-06-01T23:59:59.000Z

138

Heavy Metal Contamination In Soil Under The Application Of Polluted Sewage Water Across Vrishabhavathi River  

E-Print Network [OSTI]

The main aim in this study is to assess the level of heavy metals concentration in soil profile and their mobility in the presence of pH and organic carbon,where polluted water is used in agriculture. The samples of soil collected at different sites across Vrishabhavathi river valley have been analyzed for heavy metals, viz. Pb, Zn, Cd, Cr, Cu, Ni, Fe and Mn using atomic absorption spectrophotometer. These values assessed with respect to reference soil taken from unpolluted soil profile. The heavy metals studied at all sampling sites compared with Indian Standards and all heavy metals are below permissible limits. The concentration of all the metals is high compared to the soil sample taken from unpolluted site shows the build up of heavy metal concentration using polluted water in irrigation. The % of organic carbon varies from 1.9 to 2.9 % in top layer and 1 to 1.6 % in the subsequent layer. The pH value is higher on top layer soil and decreases in subsequent layer.

Jayadev E. T. Puttaih

139

Sedimentation and chronology of heavy metal pollution in Oslo harbor, Norway Aivo Lepland a,*, Thorbjrn J. Andersen b  

E-Print Network [OSTI]

Sedimentation and chronology of heavy metal pollution in Oslo harbor, Norway Aivo Lepland a that pollution by these metals peaked between 1940 and 1970. Dating results indicate that Hg discharges peaked such as heavy metals and organic pollu- tants are typically scavenged by suspended, fine-grained, mineral

Alve, Elisabeth

140

CO2 Removal from Flue Gas Using MIcroporous Metal Organic Frameworks  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Removal from Flue Gas Using Removal from Flue Gas Using Microporous Metal Organic Frameworks Background The mission of the U.S. Department of Energy's (DOE) Existing Plants, Emissions, & Capture (EPEC) Research & Development (R&D) Program is to develop innovative environmental control technologies to enable full use of the nation's vast coal reserves, while at the same time allowing the current fleet of coal-fired power plants to comply with existing and emerging environmental regulations. The EPEC R&D

Note: This page contains sample records for the topic "heavy metals removal" 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

Heavy metals in blue mussels (mytilus edulis) in the Bergen Harbor area, Western Norway  

SciTech Connect (OSTI)

Heavy metal discharges to the marine environment are of great concern all over the world. Both essential (e.g., Fe, Zn, Cu) and non essential (e.g., Hg, Cd, Pb) metals are toxic to living organism when subjected to high concentration. Many heavy metals accumulate in organisms and some also accumulate in the food chain. The anthropogenic heavy metal outlets can in this way both reduce marine species diversity and ecosystem. Further, by consuming seafood, humans will be exposed to the metals with a potential danger to human health. Goldberg proposed to use marine mussels to monitor contamination levels of coastal waters. Since then marine mussels, especially the blue mussel (Mytilus edulis), has been used widely as a surveillance organism. The blue mussel is regarded a suitable species for this purpose because it accumulates metals, it sessile, has a relatively long life span, is large enough for individual analysis, can tolerate a relatively wide range of temperature and salinity regimes, and can also synthesize the metal-binding protein, metallothionein, for metal detoxification. Furthermore, the blue mussel is a popular and tasteful food source and is suitable for culturing. The world-wide annual yield of mussels during the period 1988 to 1992 was about 1.3 million tons, of which about 0.5 million tons was Mytilus edulis. In Norway, the annual production was 77 tons in 1990. The interest of culturing mussels has increased in recent years, but the consumption of mussels has been hampered both by toxic algae and high levels of heavy metals. The latter is of special concern to those close to urban or industrial areas. This study investigated whether blue mussels in the Bergen Harbor area were contaminated with the heavy metals zinc, copper, lead, cadmium, and mercury, evaluating whether humans could eat them. 21 refs., 6 figs.

Andersen, V.; Johannessen, P.J. [Univ. of Bergen (Norway)] [Univ. of Bergen (Norway); Maage, A. [Directorate of Fisheries, Bergen (Norway)] [Directorate of Fisheries, Bergen (Norway)

1996-12-31T23:59:59.000Z

142

Aging of Iron (Hydr)oxides by Heat Treatment and Effects on Heavy  

E-Print Network [OSTI]

)oxides are used to remove heavy metals from wastewater and in the treatment of air pollution control residuesAging of Iron (Hydr)oxides by Heat Treatment and Effects on Heavy Metal Binding M E T T E A . S ? R generated in waste incineration. In this study, iron oxides containing heavy metals (e.g., Pb, Hg, Cr

Frenkel, Anatoly

143

Study of the mechanisms of heavy metal sorption by mineral apatite: the feasibility of soil and ground water remediation.  

E-Print Network [OSTI]

??In this work, the mechanisms of heavy metal sorption by two forms of mineral apatite were studied. The materials used include synthetic hydroxyapatite (HAP) and (more)

Kalu?erovi?-Radoi?i? Tatjana

2010-01-01T23:59:59.000Z

144

Towards a more quantitative understanding of the complex interactions between natural organic matter, heavy metals, and goethite.  

E-Print Network [OSTI]

??Dissolved natural organic matter (NOM) and heavy metals are ubiquitous in aqueous and terrestrial systems. Adsorption processes involving mineral surfaces largely control the fate, transport, (more)

Arthurs, Leilani

2008-01-01T23:59:59.000Z

145

Engineering of microorganisms towards recovery of rare metal ions  

Science Journals Connector (OSTI)

The bioadsorption of metal ions using microorganisms is an attractive technology for the recovery of rare metal ions as well as removal of toxic heavy metal ions from aqueous solution. In initial attempts, microo...

Kouichi Kuroda; Mitsuyoshi Ueda

2010-06-01T23:59:59.000Z

146

Mass balance of heavy metals in New Haven Harbor, Connecticut ...  

Science Journals Connector (OSTI)

ABSTRACT: A mass balance was constructed quantifying all known sources and sinks for the metals Ag, Cd, Cu, and Pb in New Haven Harbor, Connecticut,...

147

The Fate of Heavy Metals in Highway Stormwater Runoff: The Characterization of a Bioretention Basin in the Midwest  

E-Print Network [OSTI]

The usual wear of automobiles and road surfaces deposits numerous environmental pollutants on roadways and parking lots, including heavy metals such as copper, zinc, lead, nickel and cadmium. During rainfall and snow events, these metals are washed...

Lacy, Sarah

2009-01-01T23:59:59.000Z

148

Determination of heavy metal pollution in Zonguldak (Turkey) by moss analysis (hypnum cupressiforme)  

SciTech Connect (OSTI)

This paper explores the first attempt at determining the levels of atmospheric heavy metal contamination in the Zonguldak province through the analysis of moss (Hypnum cupressiforme Hedw.). Sampling was performed at 24 sites after a wet period to avoid contamination from soil compounds in the province. Dried samples, which were unwashed but cleaned of soil particles and other extraneous material, were digested with HNO{sub 3}/HClO{sub 4}. Concentrations of heavy metals (Fe, Cu, Pb, Cr, Co, Ni, and As) were analyzed by ICP-OES to estimate the geographic distribution of the atmospheric heavy metal depositions. The general order of the concentrations of the heavy metal content in Hypnum cupressiforme Hedw. was observed to be Fe > Pb > Cu > Ni > Cr > As > Co. Mean levels of the measured elements were higher when compared to European levels. Arsenic, iron, and chromium were the most elevated elements when compared with European data. The mean concentrations of these elements in the studied area were 8.3 (Co), 6.7 (Fe), 5.2 (Cr), 4.6 (As), and 2.7 (Ni) times the background levels of the reference site (C3). Among the studied heavy metals, only lead showed little variation in measured values due to traffic in the area. Main sources of increased heavy metal content of the moss samples were found to be: I) the Catalagzi Power Plant (CATES); ii) the Eregli Iron-Steel Plant (ERDEMIR); iii) space heating; and iv) traffic-related emissions. Results are presented in the form of color-scaled contour maps using a Geographic Information System (GIS)-based mapping technique.

Uyar, G.; Avcil, E.; Oren, M.; Karaca, F.; Oncel, M.S. [Zonguldak Karaelmas University, Zonguldak (Turkey). Faculty of Science & Arts

2009-01-15T23:59:59.000Z

149

Analysis of removal alternatives for the Heavy Water Components Test Reactor at the Savannah River Site. Revision 1  

SciTech Connect (OSTI)

This engineering study evaluates different alternatives for decontamination and decommissioning of the Heavy Water Components Test Reactor (HWCTR). Cooled and moderated with pressurized heavy water, this uranium-fueled nuclear reactor was designed to test fuel assemblies for heavy water power reactors. It was operated for this purpose from march of 1962 until December of 1964. Four alternatives studied in detail include: (1) dismantlement, in which all radioactive and hazardous contaminants would be removed, the containment dome dismantled and the property restored to a condition similar to its original preconstruction state; (2) partial dismantlement and interim safe storage, where radioactive equipment except for the reactor vessel and steam generators would be removed, along with hazardous materials, and the building sealed with remote monitoring equipment in place to permit limited inspections at five-year intervals; (3) conversion for beneficial reuse, in which most radioactive equipment and hazardous materials would be removed and the containment building converted to another use such as a storage facility for radioactive materials, and (4) entombment, which involves removing hazardous materials, filling the below-ground structure with concrete, removing the containment dome and pouring a concrete cap on the tomb. Also considered was safe storage, but this approach, which has, in effect, been followed for the past 30 years, did not warrant detailed evaluation. The four other alternatives were evaluate, taking into account factors such as potential effects on the environment, risks, effectiveness, ease of implementation and cost. The preferred alternative was determined to be dismantlement. This approach is recommended because it ranks highest in the comparative analysis, would serve as the best prototype for the site reactor decommissioning program and would be most compatible with site property reuse plans for the future.

Owen, M.B.

1997-04-01T23:59:59.000Z

150

Fluid clathrate system for continuous removal of heavy noble gases from mixtures of lighter gases  

DOE Patents [OSTI]

An apparatus and method for separation of heavy noble gas in a gas volume. An apparatus and method have been devised which includes a reservoir containing an oil exhibiting a clathrate effect for heavy noble gases with a reservoir input port and the reservoir is designed to enable the input gas volume to bubble through the oil with the heavy noble gas being absorbed by the oil exhibiting a clathrate effect. The gas having reduced amounts of heavy noble gas is output from the oil reservoir, and the oil having absorbed heavy noble gas can be treated by mechanical agitation and/or heating to desorb the heavy noble gas for analysis and/or containment and allow recycling of the oil to the reservoir.

Gross, Kenneth C. (Bolingbrook, IL); Markun, Francis (Joliet, IL); Zawadzki, Mary T. (South Bend, IN)

1998-01-01T23:59:59.000Z

151

Fluid clathrate system for continuous removal of heavy noble gases from mixtures of lighter gases  

DOE Patents [OSTI]

An apparatus and method are disclosed for separation of heavy noble gas in a gas volume. An apparatus and method have been devised which includes a reservoir containing an oil exhibiting a clathrate effect for heavy noble gases with a reservoir input port and the reservoir is designed to enable the input gas volume to bubble through the oil with the heavy noble gas being absorbed by the oil exhibiting a clathrate effect. The gas having reduced amounts of heavy noble gas is output from the oil reservoir, and the oil having absorbed heavy noble gas can be treated by mechanical agitation and/or heating to desorb the heavy noble gas for analysis and/or containment and allow recycling of the oil to the reservoir. 6 figs.

Gross, K.C.; Markun, F.; Zawadzki, M.T.

1998-04-28T23:59:59.000Z

152

HEAVY METAL POLLUTION IN A TROPICAL LAGOON CHILIKA LAKE, ORISSA, INDIA 1  

E-Print Network [OSTI]

Chilika lake, the largest costal lagoon of Asia is one of the most dynamic ecosystems along the Indian coast. The lagoon has undergone a considerable reduction in surface area due to input from natural process and human activities. The purpose of this investigation is to document the heavy metal concentration in sediment, surface water and possible entry to food chain. Concentration of all elements increase in the sediments in comparison to surface water. Metal ions are in the following order Mn> Mg> Ni> Cu>Zn> Cu> Pb> Cr. In the sediments heavy metals like Pb, Cd, Mn, Ni, Zn, Co are present in surface water and Mg was below detection limits. Metal concentrations in the sediment indicate an increase in the pollution load due to movement of fertilizers, agricultural water, prawn cultivation and Motor Boat operations. An immediate attention from the concerned authorities is required in order to protect the lake from further pollution.

Sagarika Nayak; Gayatri Nahak; Debyani Samantray; Rajani Kanta Sahu

153

Process for removing copper in a recoverable form from solid scrap metal  

DOE Patents [OSTI]

A process for removing copper in a recoverable form from a copper/solid ferrous scrap metal mix is disclosed. The process begins by placing a copper/solid ferrous scrap metal mix into a reactor vessel. The atmosphere within the reactor vessel is purged with an inert gas or oxidizing while the reactor vessel is heated in the area of the copper/solid ferrous scrap metal mix to raise the temperature within the reactor vessel to a selected elevated temperature. Air is introduced into the reactor vessel and thereafter hydrogen chloride is introduced into the reactor vessel to obtain a desired air-hydrogen chloride mix. The air-hydrogen chloride mix is operable to form an oxidizing and chloridizing atmosphere which provides a protective oxide coating on the surface of the solid ferrous scrap metal in the mix and simultaneously oxidizes/chloridizes the copper in the mix to convert the copper to a copper monochloride gas for transport away from the solid ferrous scrap metal. After the copper is completely removed from the copper/solid ferrous scrap metal mix, the flows of air and hydrogen chloride are stopped and the copper monochloride gas is collected for conversion to a recoverable copper species.

Hartman, Alan D. (Albany, OR); Oden, Laurance L. (Albany, OR); White, Jack C. (Albany, OR)

1995-01-01T23:59:59.000Z

154

Process for the hydrotreatment of heavy hydrocarbons in the presence of reduced metals  

SciTech Connect (OSTI)

A heavy hydrocarbon charge containing sulfur, asphaltenes and/or resins is hydrotreated in the liquid phase at 250/sup 0/-500/sup 0/ C. under a pressure of 20-350 bars in the presence of a catalyst previously obtained by reacting an organic compound of a transition metal with an organic aluminum compound, in a hydrocarbon free of asphaltene and resin. The transition metal organic compound is advantageously an iron, nickel, cobalt, molybdenum, tungsten or vanadium acetylacetonate or carboxylate.

Dinh, C.T.; Desvard, A.; Jacquin, Y.; Martino, G.

1984-03-06T23:59:59.000Z

155

Mercury and Other Heavy Metals Influence Bacterial Community Structure in Contaminated Streams  

E-Print Network [OSTI]

Mercury and Other Heavy Metals Influence Bacterial Community Structure in Contaminated Streams Research The influences of uranium (U), mercury (Hg) and methylmercury (MeHg) on the microbial community. #12;High concentrations of uranium, inorganic mercury, Hg(II) and methymercury (MeHg) have been

156

Hydroconversion of heavy crude oils using soluble metallic compounds in the presence of hydrogen or methane  

SciTech Connect (OSTI)

The hydroconversion of heavy crude oil was studied under thermal and catalytic conditions using soluble organo-metallic compounds of Mo, Fe, Cr, V, Ni, and Co as a catalyst precursors. All catalysts are effective for the hydroconversion, however, molybdenum and nickel compounds are preferred.

Morales, A.; Salazar, A.; Ovalles, C.; Filgueiras, E. [INTEVEP, Caracas (Venezuela)

1996-12-31T23:59:59.000Z

157

Heavy Element Abundances in Presolar Silicon Carbide Grains from Low-Metallicity AGB Stars  

E-Print Network [OSTI]

Heavy Element Abundances in Presolar Silicon Carbide Grains from Low-Metallicity AGB Stars Peter explosions. Silicon carbide is the best studied presolar mineral. Based on its isotopic compositions the identified presolar minerals are diamond, silicon carbide (SiC), graphite, silicon nitride (Si3N4), corundum

158

Effect of Fly Ash on Solidification and Heavy Metals Chemical Speciation of Sludge  

Science Journals Connector (OSTI)

In order to explore new municipal sewage sludge treatment method and reduce its harm for environment, fly ash discarded from power plant was used as conditioner in sludge treatment in the paper. The properties of sewage sludge were changed after adding ... Keywords: fly ash, sludge, compressive strength, heavy metal, speciation

Yongjian Piao; Mingsong Wu; Xun Xu; Qingliang Zhao; Fugui Zhang; Nanqi Ren

2011-01-01T23:59:59.000Z

159

Speciation of heavy metals in cement-stabilized waste forms: A micro-spectroscopic study  

E-Print Network [OSTI]

Assuring safe disposal and long-term storage of haz- ardous and radioactive wastes represents a primary en- vironmental task of industrial societies. The long-term disposal of the hazardous wastes is associatedSpeciation of heavy metals in cement-stabilized waste forms: A micro-spectroscopic study M. Vespa

160

TOLERANCE OF HEAVY METALS IN VASCULAR PLANTS: ARSENIC HYPERACCUMULATIONBY  

E-Print Network [OSTI]

the roots take up colossal amounts of a toxic metal from soils and rapidly sequester into their above-ground water contributed to countless cases of chronic arsenic poisoning in countries such as Chile, Argentina to both humans and animals, remediation of arsenic-contaminatedsites has become absolute priority

Ma, Lena

Note: This page contains sample records for the topic "heavy metals removal" 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

A Fuzzy Model of Heavy Metal Loadings in Marine Environment  

E-Print Network [OSTI]

contaminants, questions have been raised as to the environmental impact of long-term disposal in coastal areas and Morecambe Bay). Each metal concentration is associated with a fuzzy set "contaminated", defined over a set indicates all highly contaminated sites. The proposed fuzzy model is easy to implement and the results

Kuncheva, Ludmila I.

162

Removal and recovery of radionuclides and toxic metals from wastes, soils and materials  

SciTech Connect (OSTI)

A process has been developed at Brookhaven National Laboratory (BNL) for the removal of metals and radionuclides from contaminated materials, soils, and waste sites (Figure 1). In this process, citric acid, a naturally occurring organic complexing agent, is used to extract metals such as Ba, Cd, Cr, Ni, Zn, and radionuclides Co, Sr, Th, and U from solid wastes by formation of water soluble, metal-citrate complexes. Citric acid forms different types of complexes with the transition metals and actinides, and may involve formation of a bidentate, tridentate, binuclear, or polynuclear complex species. The extract containing radionuclide/metal complex is then subjected to microbiological degradation followed by photochemical degradation under aerobic conditions. Several metal citrate complexes are biodegraded and the metals are recovered in a concentrated form with the bacterial biomass. Uranium forms binuclear complex with citric acid and is not biodegraded. The supernatant containing uranium citrate complex is separated and upon exposure to light, undergoes rapid degradation resulting in the formation of an insoluble, stable polymeric form of uranium. Uranium is recovered as a precipitate (uranium trioxide) in a concentrated form for recycling or for appropriate disposal. This treatment process, unlike others which use caustic reagents, does not create additional hazardous wastes for disposal and causes little damage to soil which can then be returned to normal use.

Francis, A.J.

1993-07-01T23:59:59.000Z

163

In-field remediation of tons of heavy metal-rich waste by Joule heating vitrification  

Science Journals Connector (OSTI)

An in-field remediation method of tons of Pb and Zn-rich ceramic waste based on Joule heating vitrification is presented. The progressive heating up to about 1850C led to the complete melting of the waste material and the rapid cooling of the melt formed a monolithic glass of 55tons. The obtained glass was chemically and morphologically homogeneous and immobilized the heavy metals and non-volatile inorganic compounds. The occurrence of crystalline phases such as zircon and cordierite was observed in the lowermost part of the monolith due to the different cooling rate. Leaching tests showed that the vitrified monolith presented a high chemical resistance and metal ions were immobilized into the glass matrix. The presented in-field vitrification process was highly effective in the remediation of tons of heavy metal-rich materials and can be exploited further for remediation of large amounts of soils and asbestos-based materials.

Francesco Dellisanti; Piermaria L. Rossi; Giovanni Valdr

2009-01-01T23:59:59.000Z

164

The Extraction of Heavy Metals by Means of a New Electrolytic Method  

SciTech Connect (OSTI)

The extraction of metals in known metallurgical methods is pursued on the basis of separating as much as possible the desired metal's content from the ore concentrate, in the most economical manner. When these principles are also applied to the extraction of heavy metals, the related environmental factors do not readily meet with requirements. Today, an acceptable extraction technology for metals must satisfy the need to produce the deep separation of metals from their source in both economical and environmentally safe manner. This pertains to the direction of our ongoing research and development, among others in the field of environmental remediation. Earlier, we successfully addressed in an environmentally safe manner the selective extraction of radioactive isotopes from liquid radioactive wastes, produced at Armenia's Metzamor Nuclear Power Plant and implemented a functioning LRW station at the NPP. Currently, we extended our new electrodialysis-based electrolytic method in a laboratory scale, for the extraction and deep separation of different metals, including the heavy metals. Our new method, its efficiency, economy and full compliance with environmental issues will be presented.

Guiragossian, Z. G.; Martoyan, G. A.; Injeyan, S. G.; Tonikyan, S. G.; Nalbandyan, G. G.

2003-02-25T23:59:59.000Z

165

Heavy metals emission from controlled combustion of PVC  

E-Print Network [OSTI]

, oil, and household product containers (4). The r easons for its enormous versatility and range of application, besides its relatively low cost, derive from a combination of its basic structure which gives rise to a relatively tough and rigid... salts, and later on, inorganic lead salt derivatives were used as organometallic stabilizers. Organometallic stabilizers gained wide spread popularity in rigid and plasticized PVC applications. In the early 1950's, alkaline earth metal salts were...

El-Ayyoubi, Mohammed A.

1989-01-01T23:59:59.000Z

166

Yeast Biosorption and Recycling of Metal Ions by Cell Surface Engineering  

Science Journals Connector (OSTI)

Metal biosorption by microorganisms contributes to the removal of toxic heavy metal ions and collection of metal resources from waste ... . Cell surface biosorption enhanced by cell surface engineering is a uniqu...

Kouichi Kuroda; Mitsuyoshi Ueda

2011-01-01T23:59:59.000Z

167

Heavy metals in bivalve mussels and their habitats from different sites along the Chilean Coast  

SciTech Connect (OSTI)

It is well known that heavy metals have a great ecological significance due to their toxicity and accumulative behaviour playing a prominent role in marine ecosystems. They occur in all compartments in the marine environment with a tendency to accumulate in organism from different trophic levels of the marine webs. Along this pathway, toxic trace metals become a potential hazard for man and mammals. Coastal and estuarine zones are more vulnerable to anthropogenic pollution with toxic metals and it must be kept in mind that these zones have high seafood production. Chile is in a favourable position to develop fishing activities since it has approximately 4.500 km. of coastline bordering the South Pacific Ocean. The seawater is rich in nutrients and new aquaculture projects have been developed during the last year. However, these seafoods, like other marine organisms, are susceptible to being contaminated by trace metals, produced especially by the mining and industrial processing of ores and metals (i.e., Cu, Mo). This activity is well known as an important source of heavy metals, due to the enormous quantities of waste products, some of which were formerly released directly to the marine environment. Actually there are many aspects demanding better and more detailed knowledge on the occurrence, inventory, of the Chilean marine ecosystem. For these reasons we are developing a programme for monitoring some heavy metals in marine samples. The development of analytical quality control procedures and the analysis of toxic trace elements in fresh and canned mussels were recently published. In this paper, we present the results obtained for the Cadmium, Copper and Zinc contents in water, sediment and mollusc samples collected from different geographical areas located along the coast of Chile. 11 refs., 1 fig., 1 tab.

De Gregori, I.; Pinochet, H.; Delgado, D. (Catholic Univ. of Valparaiso (Chile)); Gras, N.; Munoz, L. (Nuclear Center La Reina, Santiago (Chile))

1994-02-01T23:59:59.000Z

168

Heavy metals in the eastern oyster, Crassostrea virginica, of the Mississippi Sound  

SciTech Connect (OSTI)

Levels of metals in oysters in the Sound are of profound interest not only because they document those geographic areas where metal pollution levels may be problematic but because they may disclose possible problems to consumers of oysters. At the present time objective federal standards for heavy metals in oysters and other seafood are restricted to mercury. The closure of Mississippi oyster reefs has been predicated upon bacteriological standards with little if any attention paid to heavy metals. A study of fourteen metals in oysters of the Sound was began in 1988 with objectives differing from that of the Status and Trends Program (STP) in three ways. STP levels are reported on dry weight basis of composites from three sites. In the present study, oysters were analyzed and reported on wet weight basis. Additionally analyses were made of individual specimens to indicate expected specimen to specimen variations and were conducted on oysters from the three STP and two other important oyster reef sites. In the future three or more additional sites will be added to this continuing survey effort. Metals chosen for this study were lead (Pb), cadmium (Cd), iron (Fe), copper (Cu), cobalt (Co), manganese (Mn), zinc (Zn), silver (Ag), nickel (Ni), mercury (Hg), aluminum (Al), chromium (Cr), molybdenum (Mo), and vanadium (V).

Lytle, T.F.; Lytle, J.S. (Gulf Coast Research Lab., Ocean Springs, MS (USA))

1990-01-01T23:59:59.000Z

169

Use of wastewater ER sludges for the immobilization of heavy metals  

SciTech Connect (OSTI)

The distribution, mobility, and bioavailability of heavy metals in soils, surface water, and ground water have been of major interest and concern from both environmental and geochemical standpoints. Wastewater sludges represent an important anthropogenic factor whose impact on these processes is not fully understood. In the past, incineration and landfilling were common practices for discarding wastewater sludges. However, as local and state laws governing the disposal of these materials have become more stringent, land application has been used as an alternative. Reported studies have shown that the impact of land application of sludges can vary widely and is influenced by a number of factors, including the source of the sludge; the organic matter content of the sludge; the form in which the sludge is applied; and the prevailing conditions of the receiving soils. It has also been shown that sewage sludge can have solubilizing effects on solid-phase heavy metals, thereby causing geochemical shifts of the insoluble fractions of metals to the more soluble forms. The work presented in this paper utilized synthetic minerals, standard solutions, sludges, and agricultural soils obtained from different sources to determine the mechanisms involved in the mineralization of heavy metals by sludge; the influence of soil conditions; interelemental effects; the influence of natural organic matter; and possible microbial activity that may come into play. Several types of sludge were evaluated for lead binding capacity.

Macha, S.; Murray, D.; Urasa, I.T. [Hampton Univ., VA (United States)

1996-10-01T23:59:59.000Z

170

Lead in Your Drinking Water Lead (Pb) is an extremely toxic heavy metal that unfortunately occurs widely in  

E-Print Network [OSTI]

Lead in Your Drinking Water Lead (Pb) is an extremely toxic heavy metal that unfortunately occurs of metallic lead in the soil (4) Drinking water ­ water as it leaves the treatment plant has no lead;Common metals used for the supply pipe are lead, copper and galvanized iron. Also in the system

Maynard, J. Barry

171

Abstract No. pan0505 Sorption of Heavy Metal Contaminants onto Hydrated Ferric Oxides: Mechanistic Modeling using X-ray  

E-Print Network [OSTI]

Abstract No. pan0505 Sorption of Heavy Metal Contaminants onto Hydrated Ferric Oxides: Mechanistic. Hence, to understand the mobility and bioavailability of these metal contaminants, these sorption suggesting that sorption of these metal ions onto ferrihydrite can be described by one average type of site

Sparks, Donald L.

172

Colloids and Surfaces A: Physicochem. Eng. Aspects 281 (2006) 194201 Multi-metal biosorption in a fixed-bed flow-through column  

E-Print Network [OSTI]

-biosorbent biomass of Sargassum fluitans brown seaweed biomass is capable of effectively removing toxic heavy metals of toxic heavy metals from industrial metal-bearingeffluentshasbeenstudiedforsometime[1,19,28]. Biosorption is a process employing dead biomass to sorb heavy metals from aqueous solutions [18]. Low costs and relatively

Volesky, Bohumil

173

Novel Sorbent-Based Process for High Temperature Trace Metal Removal  

SciTech Connect (OSTI)

The objective of this project was to demonstrate the efficacy of a novel sorbent can effectively remove trace metal contaminants (Hg, As, Se and Cd) from actual coal-derived synthesis gas streams at high temperature (above the dew point of the gas). The performance of TDA's sorbent has been evaluated in several field demonstrations using synthesis gas generated by laboratory and pilot-scale coal gasifiers in a state-of-the-art test skid that houses the absorbent and all auxiliary equipment for monitoring and data logging of critical operating parameters. The test skid was originally designed to treat 10,000 SCFH gas at 250 psig and 350 C, however, because of the limited gas handling capabilities of the test sites, the capacity was downsized to 500 SCFH gas flow. As part of the test program, we carried out four demonstrations at two different sites using the synthesis gas generated by the gasification of various lignites and a bituminous coal. Two of these tests were conducted at the Power Systems Demonstration Facility (PSDF) in Wilsonville, Alabama; a Falkirk (North Dakota) lignite and a high sodium lignite (the PSDF operator Southern Company did not disclose the source of this lignite) were used as the feedstock. We also carried out two other demonstrations in collaboration with the University of North Dakota Energy Environmental Research Center (UNDEERC) using synthesis gas slipstreams generated by the gasification of Sufco (Utah) bituminous coal and Oak Hills (Texas) lignite. In the PSDF tests, we showed successful operation of the test system at the conditions of interest and showed the efficacy of sorbent in removing the mercury from synthesis gas. In Test Campaign No.1, TDA sorbent reduced Hg concentration of the synthesis gas to less than 5 {micro}g/m{sup 3} and achieved over 99% Hg removal efficiency for the entire test duration. Unfortunately, due to the relatively low concentration of the trace metals in the lignite feed and as a result of the intermittent operation of the PSDF gasifier (due to the difficulties in the handling of the low quality lignite), only a small fraction of the sorbent capacity was utilized (we measured a mercury capacity of 3.27 mg/kg, which is only a fraction of the 680 mg/kg Hg capacity measured for the same sorbent used at our bench-scale evaluations at TDA). Post reaction examination of the sorbent by chemical analysis also indicated some removal As and Se (we did not detect any significant amounts of Cd in the synthesis gas or over the sorbent). The tests at UNDEERC was more successful and showed clearly that the TDA sorbent can effectively remove Hg and other trace metals (As and Se) at high temperature. The on-line gas measurements carried out by TDA and UNDEERC separately showed that TDA sorbent can achieve greater than 95% Hg removal efficiency at 260 C ({approx}200g sorbent treated more than 15,000 SCF synthesis gas). Chemical analysis conducted following the tests also showed modest amounts of As and Se accumulation in the sorbent bed (the test durations were still short to show higher capacities to these contaminants). We also evaluated the stability of the sorbent and the fate of mercury (the most volatile and unstable of the trace metal compounds). The Synthetic Ground Water Leaching Procedure Test carried out by an independent environmental laboratory showed that the mercury will remain on the sorbent once the sorbent is disposed. Based on a preliminary engineering and cost analysis, TDA estimated the cost of mercury removal from coal-derived synthesis gas as $2,995/lb (this analysis assumes that this cost also includes the cost of removal of all other trace metal contaminants). The projected cost will result in a small increase (less than 1%) in the cost of energy.

Gokhan Alptekin

2008-09-30T23:59:59.000Z

174

Metallization of hydrogen using heavy-ion-beam implosion of multilayered cylindrical targets  

Science Journals Connector (OSTI)

Employing a two-dimensional simulation model, this paper presents a suitable design for an experiment to study metallization of hydrogen in a heavy-ion beam imploded multilayered cylindrical target that contains a layer of frozen hydrogen. Such an experiment will be carried out at the upgraded heavy-ion synchrotron facility (SIS-18) at the Gesellschaft fr Schwerionenforschung, Darmstadt by the end of the year 2001. In these calculations we consider a uranium beam that will be available at the upgraded SIS-18. Our calculations show that it may be possible to achieve theoretically predicted physical conditions necessary to create metallic hydrogen in such experiments. These include a density of about 1 g/cm3, a pressure of 35 Mbar, and a temperature of a few 0.1 eV.

N. A. Tahir, D. H. H. Hoffmann, A. Kozyreva, A. Tauschwitz, A. Shutov, J. A. Maruhn, P. Spiller, U. Neuner, J. Jacoby, M. Roth, R. Bock, H. Juranek, and R. Redmer

2000-12-19T23:59:59.000Z

175

Comparative thermodynamic and experimental study of some heavy metal behaviours during automotive shredder residues incineration  

Science Journals Connector (OSTI)

Experimental and theoretical studies of the behaviour of some heavy metals were undertaken during Automotive Shredder Residues (ASR) incineration. A thermodynamic study at equilibrium was performed using a software minimizing the free Gibbs energy. The metals studied were barium, copper, lead and zinc. The studies were performed mostly at two temperatures: 1123 and 1373 K. The thermodynamic study showed that the chlorine content is the most important parameter influencing the volatility of the studied metals. It also showed that in default of chlorine in a system containing several metals, barium chloride in its condensed form is the most easily formed. Other metals remained in their metallic form or in the form of oxides. The presence of hydrogen in the system has a general limiting influence on the metal volatility because, especially at high temperatures, hydrogen chloride is more likely to be formed. In the experimental field, the behaviours of metals were studied using commercial polymers as waste models: a PVC mastic, a polyurethane mastic and a rubber powder. Copper and barium presented a non volatile behaviour during the incineration of waste matrixes as ASR, being present also in residual ash. On the other hand, lead was completely formed in the gas phase and zinc showed an equal partitioning between the two principal phases of the treatment.

G. Trouve; A. Kauffmann; L. Delfosse

1998-01-01T23:59:59.000Z

176

Fixation and partitioning of heavy metals in slag after incineration of sewage sludge  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer The contents and partitioning of HMs in slag of sludge incineration were examined. Black-Right-Pointing-Pointer The fixation rate decreases with residential time and finally keeps a constant. Black-Right-Pointing-Pointer Water mass fraction of 55% is optimal for the sediment for Ni, Mn, Zn, Cu and Cr. Black-Right-Pointing-Pointer Water mass fraction of 75% is optimal for the sediment for Pb. Black-Right-Pointing-Pointer We found higher temperature versus lower non-residual fraction except that of Pb. - Abstract: Fixation of heavy metals in the slag produced during incineration of sewage sludge will reduce emission of the metals to the atmosphere and make the incineration process more environmentally friendly. The effects of incineration conditions (incineration temperature 500-1100 Degree-Sign C, furnace residence time 0-60 min, mass fraction of water in the sludge 0-75%) on the fixation rates and species partitioning of Cd, Pb, Cr, Cu, Zn, Mn and Ni in slag were investigated. When the incineration temperature was increased from 500 to 1100 Degree-Sign C, the fixation rate of Cd decreased from 87% to 49%, while the fixation rates of Cu and Mn were stable. The maximum fixation rates for Pb and Zn and for Ni and Cr were reached at 900 and 1100 Degree-Sign C, respectively. The fixation rates of Cu, Ni, Cd, Cr and Zn decreased as the residence time increased. With a 20 min residence time, the fixation rates of Pb and Mn were low. The maximum fixation rates of Ni, Mn, Zn, Cu and Cr were achieved when the mass fraction of water in the sludge was 55%. The fixation rate of Cd decreased as the water mass fraction increased, while the fixation rate of Pb increased. Partitioning analysis of the metals contained in the slag showed that increasing the incineration temperature and residence time promoted complete oxidation of the metals. This reduced the non-residual fractions of the metals, which would lower the bioavailability of the metals. The mass fraction of water in the sludge had little effect on the partitioning of the metals. Correlation analysis indicated that the fixation rates of heavy metals in the sludge and the forms of heavy metals in the incinerator slag could be controlled by optimization of the incineration conditions. These results show how the bioavailability of the metals can be reduced for environmentally friendly disposal of the incinerator slag.

Chen Tao [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China); Graduate School of Chinese Academy of Sciences, Beijing 100082 (China); Yan Bo, E-mail: yanbo2007@gig.ac.cn [State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 (China)

2012-05-15T23:59:59.000Z

177

Heavy metals in liquid pig manure in light of bacterial antimicrobial resistance  

SciTech Connect (OSTI)

Heavy metals are regularly found in liquid pig manure, and might interact with bacterial antimicrobial resistance. Concentrations of heavy metals were determined by atomic spectroscopic methods in 305 pig manure samples and were connected to the phenotypic resistance of Escherichia coli (n=613) against 29 antimicrobial drugs. Concentrations of heavy metals (/kg dry matter) were 0.08-5.30 mg cadmium, 1.1-32.0 mg chrome, 22.4-3387.6 mg copper, <2.0-26.7 mg lead, <0.01-0.11 mg mercury, 3.1-97.3 mg nickel and 93.0-8239.0 mg zinc. Associated with the detection of copper and zinc, resistance rates against {beta}-lactams were significantly elevated. By contrast, the presence of mercury was significantly associated with low antimicrobial resistance rates of Escherichia coli against {beta}-lactams, aminoglycosides and other antibiotics. Effects of subinhibitory concentrations of mercury on bacterial resistance against penicillins, cephalosporins, aminoglycosides and doxycycline were also demonstrated in a laboratory trial. Antimicrobial resistance in the porcine microflora might be increased by copper and zinc. By contrast, the occurrence of mercury in the environment might, due to co-toxicity, act counter-selective against antimicrobial resistant strains.

Hoelzel, Christina S., E-mail: Christina.Hoelzel@wzw.tum.de [Chair of Animal Hygiene, Technische Universitaet Muenchen, Weihenstephaner Berg 3, 85354 Freising (Germany); Mueller, Christa [Institute for Agroecology, Organic Farming and Soil Protection, Bavarian State Research Center for Agriculture (LfL), Lange Point 12, 85354 Freising (Germany)] [Institute for Agroecology, Organic Farming and Soil Protection, Bavarian State Research Center for Agriculture (LfL), Lange Point 12, 85354 Freising (Germany); Harms, Katrin S. [Chair of Animal Hygiene, Technische Universitaet Muenchen, Weihenstephaner Berg 3, 85354 Freising (Germany)] [Chair of Animal Hygiene, Technische Universitaet Muenchen, Weihenstephaner Berg 3, 85354 Freising (Germany); Mikolajewski, Sabine [Department for Quality Assurance and Analytics, Bavarian State Research Center for Agriculture (LfL), Lange Point 4, 85354 Freising (Germany)] [Department for Quality Assurance and Analytics, Bavarian State Research Center for Agriculture (LfL), Lange Point 4, 85354 Freising (Germany); Schaefer, Stefanie; Schwaiger, Karin; Bauer, Johann [Chair of Animal Hygiene, Technische Universitaet Muenchen, Weihenstephaner Berg 3, 85354 Freising (Germany)] [Chair of Animal Hygiene, Technische Universitaet Muenchen, Weihenstephaner Berg 3, 85354 Freising (Germany)

2012-02-15T23:59:59.000Z

178

Speciation of Heavy Metals in Floodplain and Flood Sediments: a Reconnaissance Survey of the Aire Valley, West Yorkshire, Great Britain  

Science Journals Connector (OSTI)

A five-step sequential extraction technique was used to determine the chemical association of heavy metals (Pb, Zn, Cu and Cd), with major sedimentary phases (exchangeable, surface oxide and carbonate, Fe and ...

E.J. Dawson; M.G. Macklin

1998-06-01T23:59:59.000Z

179

The Emissions of PAHs and Heavy Metals from Co-Combustion of Petrochemical Sludge with Coal in CFB Incinerator  

Science Journals Connector (OSTI)

The polycyclic aromatic hydrocarbons (PAHs) and heavy metals (Hg, Pb, Ni, Cr, Cu, Zn) emission characteristics in flue gas from co-combustion of petrochemical sludge and coal were investigated in a pilot-scale ci...

Ge Zhu; Changsui Zhao; Huichao Chen

2010-01-01T23:59:59.000Z

180

Quantitative analysis of heavy metals emission during the combustion and baling of polyvinyl chloride insulated copper wire  

E-Print Network [OSTI]

was conducted and compared to the airborne dust samples collected during the baling process. From these results, occupational exposures to heavy metals during the reclamation of PVC insulated copper wire were assessed. Bulk ash and dust samples were ?aken...

Pickard, David Paul

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation M.C. Ridgway1  

E-Print Network [OSTI]

Changes in metal nanoparticle shape and size induced by swift heavy-ion irradiation M.C. Ridgway1 and Au nanoparticles induced by swift heavy-ion irradiation (SHII) have been characterized using-edge structure. Elemental nanoparticles of diameters 2-15 nm were first formed in amorphous SiO2 by ion

Paris-Sud XI, Université de

182

Multipollutant Removal with WOWClean System  

E-Print Network [OSTI]

such as petcoke, coal, wood, diesel and natural gas. In addition to significant removal of CO2, test results demonstrate the capability to reduce 99.5% SOx (from levels as high as 2200 ppm), 90% reduction of NOx, and > 90% heavy metals. The paper will include...

Romero, M.

2010-01-01T23:59:59.000Z

183

Uptake of heavy metals from aqueous solution by non-conventional adsorbents  

Science Journals Connector (OSTI)

The present study investigates the removal of chromium and copper metal ions from aqueous solution using non-conventional adsorbents such as modified tree barks of acacia arabica (babul) and hardwickia binnata (aajan). In this study the influence of pH, initial sorbate concentration, contact time, adsorbent dose and particle size was investigated. Maximum adsorption for both the metals was found to occur at pH 5. The process of uptake followed first-order adsorption rate expression and obeyed Langmuir and Freundlich models of adsorption. The Langmuir isotherms are best fitted as compared to Freundlich isotherms for the adsorbents studied.

S.J. Patil; A.G. Bhole; G.S. Natarajan

2011-01-01T23:59:59.000Z

184

Owen, R.B., Sandhu, N., 2000. Heavy metal accumulation and anthro-pogenic impacts on Tolo Harbour, Hong Kong. Mar. Pollut. Bull. 40,  

E-Print Network [OSTI]

.-M., 2003. Pollution history of the Masan Bay, southeast Korea, from heavy metals and foraminiferaOwen, R.B., Sandhu, N., 2000. Heavy metal accumulation and anthro- pogenic impacts on Tolo Harbour and tracer elements in sediments of the Ria de Vigo (NW Spain): an assessment of metal pollution. Mar. Pollut

Yu, K.N.

185

Precipitation of the ions of the heavy metals with aqueous triethylamine hydrosulfide  

E-Print Network [OSTI]

, though. the latter'have a worse re'putation. The advantages 'of. the 'sulfide 'system, are that the . Sul. f Mes, of the heavy metals are guantitatively . insolub'1'e and oan easily' bs' separated'; , X Grasp . I. 6'rmp' II Hj' G'~ - Hi+&', xi.... wii s pun lusind, the' sohims of ", analysis outliried in . F'lpurlis IV', V. , " and 'VI lt 8, 7), , ' T'hi: o'nly' 8 if'fe ranee' between' thii soheme 'and the soheme, found, 'in'many ltextp:dsl that tnriethylamins hydro- s'ulfids riiplaoei...

Hill, John Howard

2012-06-07T23:59:59.000Z

186

Air Pollution with Heavy Metals and Radionuclides in Slovakia Studied by the Moss Biomonitoring Technique  

E-Print Network [OSTI]

Applying the moss biomonitoring technique to air pollution studies in Slovakia, heavy metals, rare-earth elements, actinides (U and Th) were determined in 86 moss samples from the European moss survey 2000 by means of epithermal neutron activation analysis at the IBR-2 reactor (Dubna). Such elements as In, Cu, Cd, Hg and Pb were determined by AAS in the Forest Research Institute, Zvolen (Slovakia). The results of measurement of the natural radionuclides ^{210}Pb, ^{7}Be, ^{137}Cs and ^{40}K in 11 samples of moss are also reported. A comparison with the results from moss surveys 1991 and 1995 revealed previously unknown tendencies of air pollution in the examined areas.

Florek, M; Mankovska, B; Oprea, K; Pavlov, S S; Steinnes, E; Sykora, I

2001-01-01T23:59:59.000Z

187

Feasibility Investigation of the Decay Heat Removal Capability Using the Concept of a Thermosyphon in the Liquid Metal Reactor  

SciTech Connect (OSTI)

A new design concept for a decay heat removal system in a liquid metal reactor is proposed. The new design utilizes a thermosyphon to enhance the heat removal capacity and its heat transfer characteristics are analyzed against the current PSDRS (Passive Safety Decay heat Removal System) in the KALIMER (Korea Advanced Liquid Metal Reactor) design. The preliminary analysis results show that the new design with a thermosyphon yields substantial increase of 20{approx}40% in the decay heat removal capacity compared to the current design that do not have the thermosyphon. The new design reduces the temperature rise in the cooling air of the system and helps the surrounding structure in maintaining its mechanical integrity for long term operation at an accident. Also the analysis revealed the characteristics of the interactions among various heat transfer modes in the new design. (authors)

Yeon-Sik Kim; Yoon-Sub Sim; Eui-Kwang Kim [Korea Atomic Energy Research Institute, 150, Dukjin-Dong, Yusong-Gu, Taejon 305-353 (Korea, Republic of)

2002-07-01T23:59:59.000Z

188

Experimental investigation and thermodynamic modeling of extraction of heavy metal ions from aqueous solutions by chelation in supercritical carbon dioxide  

E-Print Network [OSTI]

disadvantages. First, the solvent/metal solution must be subsequently purified. Second, since the solvent may be miscible in the aqueous phase, the residual solvent must be removed from the water stream. These disadvantages can be eliminated by substituting...

Uyansoy, Hakki

2012-06-07T23:59:59.000Z

189

Applications of porous electrodes to metal-ion removal and the design of battery systems  

SciTech Connect (OSTI)

This dissertation treats the use of porous electrodes as electrochemical reactors for the removal of dilute metal ions. A methodology for the scale-up of porous electrodes used in battery applications is given. Removal of 4 ..mu..g Pb/cc in 1 M sulfuric acid was investigated in atmospheric and high-pressure, flow-through porous reactors. The atmospheric reactor used a reticulated vitreous carbon porous bed coated in situ with a mercury film. Best results show 98% removal of lead from the feed stream. Results are summarized in a dimensionless plot of Sherwood number vs Peclet number. High-pressure, porous-electrode experiments were performed to investigate the effect of pressure on the current efficiency. Pressures were varied up to 120 bar on electrode beds of copper or lead-coated spheres. The copper spheres showed high hydrogen evolution rates which inhibited lead deposition, even at high cathodic overpotentials. Use of lead spheres inhibited hydrogen evolution but often resulted in the formation of lead sulfate layers; these layers were difficult to reduce back to lead. Experimental data of one-dimensional porous battery electrodes are combined with a model for the current collector and cell connectors to predict ultimate specific energy and maximum specific power for complete battery systems. Discharge behavior of the plate as a whole is first presented as a function of depth of discharge. These results are combined with the voltage and weight penalties of the interconnecting bus and post, positive and negative active material, cell container, etc. to give specific results for the lithium-aluminum/iron sulfide high-temperature battery. Subject to variation is the number of positive electrodes, grid conductivity, minimum current-collector weight, and total delivered capacity. The battery can be optimized for maximum energy or power, or a compromise design may be selected.

Trost, G.G.

1983-09-01T23:59:59.000Z

190

BIOMONITORING OF HEAVY METAL POLLUTION NEAR COPPER SMELTER IN BOR (SERBIA) USING ACACIA  

E-Print Network [OSTI]

The correlations between sampling sites situated in the close vicinity of copper smelter (Bor, Serbia) based on heavy metal (Pb, Cu, Zn) content in plant parts and soil of acacia (Robinia pseudoacacia L.) were determined. Very strong correlations (R 2>0.9) were observed between the sites Town park and Hospital in the urban-industiral zone due to high air pollution in this sampling area. The performed cluster analysis confirmed these results by grouping the sites with high metal content in plant and soil material of Robinia pseudoacacia into the same clusters. Also, strong correlations were noted between less polluted sampling sites (Bor lake and Brestovac spa) with the control site (Sumrakovac).

Ana A. Ilic; Snezana M. Serbula; Jelena V. Kalinovic; Tanja S. Kalinovic

191

Uranium and other heavy metals in the plant-animal-human food chain near abandoned mining sites and structures in an American Indian community in northwestern New Mexico  

E-Print Network [OSTI]

Resource Evaluation (NURE) sampling that was undertaken inabove those found in the NURE sampling conducted in the1970s (Mo not evaluated by NURE). The other heavy metals (

Samuel-Nakamura, Christine

2013-01-01T23:59:59.000Z

192

Metagenomic insights into evolution of a heavy metal-contaminated groundwater microbial community  

SciTech Connect (OSTI)

Understanding adaptation of biological communities to environmental change is a central issue in ecology and evolution. Metagenomic analysis of a stressed groundwater microbial community reveals that prolonged exposure to high concentrations of heavy metals, nitric acid and organic solvents (~50 years) has resulted in a massive decrease in species and allelic diversity as well as a significant loss of metabolic diversity. Although the surviving microbial community possesses all metabolic pathways necessary for survival and growth in such an extreme environment, its structure is very simple, primarily composed of clonal denitrifying - and -proteobacterial populations. The resulting community is overabundant in key genes conferring resistance to specific stresses including nitrate, heavy metals and acetone. Evolutionary analysis indicates that lateral gene transfer could have a key function in rapid response and adaptation to environmental contamination. The results presented in this study have important implications in understanding, assessing and predicting the impacts of human-induced activities on microbial communities ranging from human health to agriculture to environmental management, and their responses to environmental changes.

Hemme, Christopher [University of Oklahoma; Deng, Ye [University of Oklahoma; Gentry, Terry [Texas A& M University; Fields, Matthew Wayne [Miami University, Oxford, OH; Wu, Liyou [University of Oklahoma, Norman; Barua, Soumitra [University of Oklahoma; Barry, Kerry [Joint Genome Institute; Green-Tringe, Susannah [Joint Genome Institute, Walnut Creek, California; Watson, David B [ORNL; He, Zhili [University of Oklahoma; Hazen, Terry [Lawrence Berkeley National Laboratory (LBNL); Tiedje, James M. [Michigan State University, East Lansing; Rubin, Edward M. [Joint Genome Institute, Walnut Creek, California; Zhou, Jizhong [University of Oklahoma, Norman

2010-02-01T23:59:59.000Z

193

Metagenomic Insights into Evolution of a Heavy Metal-Contaminated Groundwater Microbial Community  

SciTech Connect (OSTI)

Understanding adaptation of biological communities to environmental change is a central issue in ecology and evolution. Metagenomic analysis of a stressed groundwater microbial community reveals that prolonged exposure to high concentrations of heavy metals, nitric acid and organic solvents (~;;50 years) have resulted in a massive decrease in species and allelic diversity as well as a significant loss of metabolic diversity. Although the surviving microbial community possesses all metabolic pathways necessary for survival and growth in such an extreme environment, its structure is very simple, primarily composed of clonal denitrifying ?- and ?-proteobacterial populations. The resulting community is over-abundant in key genes conferring resistance to specific stresses including nitrate, heavy metals and acetone. Evolutionary analysis indicates that lateral gene transfer could be a key mechanism in rapidly responding and adapting to environmental contamination. The results presented in this study have important implications in understanding, assessing and predicting the impacts of human-induced activities on microbial communities ranging from human health to agriculture to environmental management, and their responses to environmental changes.

Hemme, Christopher L.; Deng, Ye; Gentry, Terry J.; Fields, Matthew W.; Wu, Liyou; Barua, Soumitra; Barry, Kerrie; Tringe, Susannah G.; Watson, David B.; He, Zhili; Hazen, Terry C.; Tiedje, James M.; Rubin, Edward M.; Zhou, Jizhong

2010-02-15T23:59:59.000Z

194

Antennal Deformities of Chironomid Larvae and Their Use in Biomonitoring of Heavy Metal Pollutants in the River Damodar of West Bengal, India  

Science Journals Connector (OSTI)

Analyses of sediment and water indicate the presence of heavy metal pollutants like lead, zinc, copper, mercury and cadmium of the river Damodar of India. These metals are responsible for causing morphological...

G. Bhattacharyay; A. K. Sadhu; A. Mazumdar

2005-09-01T23:59:59.000Z

195

Heavy Oil Production Technology Challenges and the Effect of Nano Sized Metals on the Viscosity of Heavy Oil.  

E-Print Network [OSTI]

?? Heavy oil and bitumen make up 70% of the discovered petroleum resources in the world. Only a very small fraction of these resources have (more)

Bjrnseth, Fabian

2013-01-01T23:59:59.000Z

196

Heavy Metal Removal from Sewage Sludge Ash by Thermochemical Treatment with Gaseous Hydrochloric acid  

Science Journals Connector (OSTI)

Division 4.3 Waste Treatment and Remedial Engineering, BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin ... Therefore, thermochemical investigations were carried out with focus on the performance of HCl-gas as Cl-donor in comparison to the well investigated solid Cl-donors magnesium chloride and calcium chloride. ... However, Kuderna(11) found that the Pcit test showed worse correlation with the results of pot experiments carried out with thermochemically treated SSA whereas the Pnac test showed very good correlation in the same investigation. ...

Christian Vogel; Christian Adam

2011-08-05T23:59:59.000Z

197

An ecological study examining the correlation of end-stage renal disease and ground water heavy metal content in Texas counties  

E-Print Network [OSTI]

An ecological study was conducted to examine the correlation of end-stage renal disease (ESRD) and the ground water heavy metal level of lead, arsenic, cadmium, mercury and the cumulative level of all four metals in Texas counties. The heavy meal...

Bishop, Scott Alan

2012-06-07T23:59:59.000Z

198

Metal MEMS Tools for Beating-heart Tissue Removal Andrew H. Gosline, Member, IEEE, Nikolay V. Vasilyev, Arun Veeramani, MingTing Wu, Greg Schmitz,  

E-Print Network [OSTI]

Metal MEMS Tools for Beating-heart Tissue Removal Andrew H. Gosline, Member, IEEE, Nikolay V the surgical removal of tissue from inside the beating heart. The tool is manufactured using a unique metal that can enter the heart through the vasculature. Incorporating both irrigation and aspiration, the tissue

Dupont, Pierre

199

Options for Determining Equivalent MHTM (Metric Tons of Heavy Metal) for DOE High Level Waste  

SciTech Connect (OSTI)

Section 114(d) of the Nuclear Waste Policy Act of 1982, as amended (NWPA), limits the overall capacity of the first repository to 70,000 metric tons of heavy metal (MTHM). Current DOE policy is to allocate DOE spent fuel and high-level waste (HLW) at 10 percent of the total, or 7,000 MTHM. For planning purposes, 4,667 MTHM will be allocated for HLW. While the NWPA provides a technical basis for determining the MTHM equivalence of HLW, it does not address the significant technical differences between DOE HLW and commercial spent nuclear fuel (SNF). Although more than 170,000 MTHM of DOE fuel has been reprocessed to produce the inventory of HLW, the amount of radioactive waste generated per metric ton of DOE fuel is only a few percent of that in a metric ton of commercial fuel. This study compares the results of four methods for determining the MTHM equivalence of DOE HLW. These methods include (1) using the actual weight of heavy metal in reprocessed DOE fuel, (2) assuming the historical equivalence of 0.5 MTHM/canister of vitrified DOE HLW, (3) comparing the total radioactivity in DOE HLW to the radioactivity of commercial SNF, and (4) comparing the total radiotoxicity of DOE HLW, as defined for those radionuclides identified in 10 CFR 20, with SNF at 1,000 and 10,000 years. This study concludes that either of the last two options would meet Congresss stated purposes of the NWPA, which are to (1) provide "reasonable assurance that the public and the environment will be adequately protected from the hazards posed by high-level radioactive waste and such spent nuclear fuel as may be disposed of in a repository", and (2) to "define Federal policy for the disposal of such waste and spent fuel".

Knecht, Dieter August; Valentine, James Henry; Luptak, Alan Jay; Staiger, Merle Daniel; Loo, Henry Hung Yiu; Wichmann, Thomas Leonard

1999-04-01T23:59:59.000Z

200

14 Congresso Brasileiro de Geologia de Engenharia e Ambiental Transfer heavy metal from soil treated to colza  

E-Print Network [OSTI]

in sludge from urban and industrial wastewater treatment plants, trying to understand their influence in the roots of colza. Keywords: Mud, heavy metals, colza, bio-accumulator, wastewater Génie Rural Eaux et Forêts (INRGREF), Tunis. (lassoued_najla@yahoo.fr), 2 Ecole Nationale Supérieure des

Paris-Sud XI, Université de

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201

Purification of alkali metal nitrates  

DOE Patents [OSTI]

A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjusting the pH of the resulting solution to within the range of between about 2 and about 7, adding sufficient reducing agent to react with heavy metal contaminants within said solution, adjusting the pH of the solution containing reducing agent to effect precipitation of heavy metal impurities and separating the solid impurities from the resulting purified aqueous solution of alkali metal nitrates. The resulting purified solution of alkali metal nitrates may be heated to evaporate water therefrom to produce purified molten alkali metal nitrate suitable for use as a heat transfer medium. If desired, the purified molten form may be granulated and cooled to form discrete solid particles of alkali metal nitrates.

Fiorucci, Louis C. (Hamden, CT); Gregory, Kevin M. (Woodridge, IL)

1985-05-14T23:59:59.000Z

202

Using alternative chemicals in the flotation of heavy metals from lead mill tailings  

SciTech Connect (OSTI)

The U.S. Bureau of Mines (USBM) investigated alternative chemicals for the flotation of heavy metal values from southeast Missouri lead mill tailings. The objectives of the study were to lower the Pb remaining in the reprocessed tailings to <500 ppm, concentrate the metal values, and lower the overall toxicity of the flotation reagent scheme. Due to the high toxicity of classic flotation chemicals, collectorless flotation, as well as nontoxic or less-toxic chemicals, was studied for use in the flotation process. The investigation centered on the National tailings pile in Flat River, MO. Advantages to using alternative chemicals for the flotation process are presented. Novel reagent schemes are discussed for the treatment of the tailings. Various nontoxic or less-toxic oils were tested, and a substitute for sodium sulfide was investigated. Using a food additive oil, soda ash, and a frother as the reagent scheme, froth flotation recovered 89% of the Pb values. Further scavenging lowered the Pb remaining in the reprocessed tailings to <500 ppm. A less-toxic substitute for sodium cyanide was also studied for use in the cleaner flotation stages. Preliminary results indicate that the food additive oil, canola oil, to be as effective as classic sulfide flotation reagents.

Benn, F.W. [Bureau of Mines, Rolla, MO (United States)

1995-04-01T23:59:59.000Z

203

Effect of stress at dosing on organophosphate and heavy metal toxicity  

SciTech Connect (OSTI)

This paper reviews recent studies assessing the effect of well-defined, severe, transient stress at dosing on two classical models of toxicity. These are the acute (anticholinesterase) toxicity seen following exposure to the organophosphate insecticide chlorpyrifos, and the nephrotoxicity elicited by the heavy metal depleted uranium, in rats. Stress was induced by periods of restraint and forced swimming in days to weeks preceding toxicant exposure. Forced swimming was far more stressful, as measured by marked, if transient, elevation of plasma corticosterone. This form of stress was administered immediately prior to administration of chlorpyrifos or depleted uranium. Chlorpyrifos (single 60 mg/kg subcutaneously) elicited marked inhibition of brain acetylcholinesterase 4-day post-dosing. Depleted uranium (single intramuscular doses of 0.1, 0.3 or 1.0 mg/kg uranium) elicited dose-dependent increase in kidney concentration of the metal, with associated injury to proximal tubular epithelium and increases in serum blood urea nitrogen and creatinine during the 30-day post-dosing period. Stress at dosing had no effect on these toxicologic endpoints.

Jortner, Bernard S. [Laboratory for Neurotoxicity Studies, Virginia-Maryland Regional College of Veterinary Medicine, Virginia Tech, 1 Duck Pond Drive, Blacksburg, VA 24061-0442 (United States)], E-mail: bjortner@vt.edu

2008-11-15T23:59:59.000Z

204

Upgrading platform using alkali metals  

DOE Patents [OSTI]

A process for removing sulfur, nitrogen or metals from an oil feedstock (such as heavy oil, bitumen, shale oil, etc.) The method involves reacting the oil feedstock with an alkali metal and a radical capping substance. The alkali metal reacts with the metal, sulfur or nitrogen content to form one or more inorganic products and the radical capping substance reacts with the carbon and hydrogen content to form a hydrocarbon phase. The inorganic products may then be separated out from the hydrocarbon phase.

Gordon, John Howard

2014-09-09T23:59:59.000Z

205

Pulmonary toxicity after exposure to military-relevant heavy metal tungsten alloy particles  

SciTech Connect (OSTI)

Significant controversy over the environmental and public health impact of depleted uranium use in the Gulf War and the war in the Balkans has prompted the investigation and use of other materials including heavy metal tungsten alloys (HMTAs) as nontoxic alternatives. Interest in the health effects of HMTAs has peaked since the recent discovery that rats intramuscularly implanted with pellets containing 91.1% tungsten/6% nickel/2.9% cobalt rapidly developed aggressive metastatic tumors at the implantation site. Very little is known, however, regarding the cellular and molecular mechanisms associated with the effects of inhalation exposure to HMTAs despite the recognized risk of this route of exposure to military personnel. In the current study military-relevant metal powder mixtures consisting of 92% tungsten/5% nickel/3% cobalt (WNiCo) and 92% tungsten/5% nickel/3% iron (WNiFe), pure metals, or vehicle (saline) were instilled intratracheally in rats. Pulmonary toxicity was assessed by cytologic analysis, lactate dehydrogenase activity, albumin content, and inflammatory cytokine levels in bronchoalveolar lavage fluid 24 h after instillation. The expression of 84 stress and toxicity-related genes was profiled in lung tissue and bronchoalveolar lavage cells using real-time quantitative PCR arrays, and in vitro assays were performed to measure the oxidative burst response and phagocytosis by lung macrophages. Results from this study determined that exposure to WNiCo and WNiFe induces pulmonary inflammation and altered expression of genes associated with oxidative and metabolic stress and toxicity. Inhalation exposure to both HMTAs likely causes lung injury by inducing macrophage activation, neutrophilia, and the generation of toxic oxygen radicals. -- Highlights: ? Intratracheal instillation of WNiCo and WNiFe induces lung inflammation in rats. ? WNiCo and WNiFe alter expression of oxidative stress and toxicity genes. ? WNiCo induces a greater oxidative burst response than WNiFe in lung macrophages.

Roedel, Erik Q., E-mail: Erik.Roedel@amedd.army.mil [Department of General Surgery, Tripler Army Medical Center, Honolulu, HI 96859 (United States); Cafasso, Danielle E., E-mail: Danielle.Cafasso@amedd.army.mil [Department of General Surgery, Tripler Army Medical Center, Honolulu, HI 96859 (United States); Lee, Karen W.M., E-mail: Karen.W.Lee@amedd.army.mil [Department of Clinical Investigation, Tripler Army Medical Center, Honolulu, HI 96859 (United States); Pierce, Lisa M., E-mail: Lisa.Pierce@amedd.army.mil [Department of Clinical Investigation, Tripler Army Medical Center, Honolulu, HI 96859 (United States)

2012-02-15T23:59:59.000Z

206

Lead in Your Drinking Water Lead (Pb) is an extremely toxic heavy metal that unfortunately occurs widely in our environment. The  

E-Print Network [OSTI]

Lead in Your Drinking Water Lead (Pb) is an extremely toxic heavy metal that unfortunately occurs of metallic lead in the soil (4) Drinking water ­ water as it leaves the treatment plant has no lead of connection. (In some cases, the water meter as well as the curb stop is outside the house.) Common metals

Maynard, J. Barry

207

Portugaliae Electrochimica Acta (2006), 24(3), 367-376 Portuguese Electrochemical A Modified Electrodialytic Cell to Recover Heavy Metals from Wastewater  

E-Print Network [OSTI]

, A Modified Electrodialytic Cell to Recover Heavy Metals from Wastewater Abo-Ghander, N. S.; Rahman, S. U electrodialysis and redn. of metal ions. The cell is able to recover metallic copper from wastewater contg. 1000 of several parameters, namely, width of wastewater compartment, applied potential and concn. of anolyte

Zaidi, S. M. Javaid

208

Carbon Dioxide Removal from Flue Gas Using Microporous Metal Organic Frameworks  

SciTech Connect (OSTI)

UOP LLC, a Honeywell Company, in collaboration with Professor Douglas LeVan at Vanderbilt University (VU), Professor Adam Matzger at the University of Michigan (UM), Professor Randall Snurr at Northwestern University (NU), and Professor Stefano Brandani at the University of Edinburgh (UE), supported by Honeywell's Specialty Materials business unit and the Electric Power Research Institute (EPRI), have completed a three-year project to develop novel microporous metal organic frameworks (MOFs) and an associated vacuum-pressure swing adsorption (vPSA) process for the removal of CO{sub 2} from coal-fired power plant flue gas. The project leveraged the team's complementary capabilities: UOP's experience in materials development and manufacturing, adsorption process design and process commercialization; LeVan and Brandani's expertise in high-quality adsorption measurements; Matzger's experience in syntheis of MOFs and the organic components associated with MOFs; Snurr's expertise in molecular and other modeling; Honeywell's expertise in the manufacture of organic chemicals; and, EPRI's knowledge of power-generation technology and markets. The project was successful in that a selective CO{sub 2} adsorbent with good thermal stability and reasonable contaminant tolerance was discovered, and a low cost process for flue gas CO{sub 2} capture process ready to be evaluated further at the pilot scale was proposed. The team made significant progress toward the current DOE post-combustion research targets, as defined in a recent FOA issued by NETL: 90% CO{sub 2} removal with no more than a 35% increase in COE. The team discovered that favorable CO{sub 2} adsorption at more realistic flue gas conditions is dominated by one particular MOF structure type, M/DOBDC, where M designates Zn, Co, Ni, or Mg and DOBDC refers to the form of the organic linker in the resultant MOF structure, dioxybenzenedicarboxylate. The structure of the M/DOBDC MOFs consists of infinite-rod secondary building units bound by DOBDC resulting in 1D hexagonal pores about 11 angstroms in diameter. Surface areas range from 800 to 1500 sq m/g for the different MOFs. Mg/DOBDC outperformed all MOF and zeolite materials evaluated to date, with about 25 wt% CO{sub 2} captured by this MOF at flue gas conditions ({approx}0.13 atm CO{sub 2} pressure, 311K). In simulated flue gas without oxygen, the zero-length (ZLC) system was very useful in quickly simulating the effect of long term exposure to impurities on the MOFs. Detailed adsorption studies on MOF pellets have shown that water does not inhibit CO{sub 2} adsorption for MOFs as much as it does for typical zeolites. Moreover, some MOFs retain a substantial CO{sub 2} capacity even with a modest water loading at room temperature. Molecular modeling was a key activity in three areas of our earlier DOE/NETL-sponsored MOF-based research on CC. First, the team was able to effectively simulate CO{sub 2} and other gas adsorption isotherms for more than 20 MOFs, and the knowledge obtained was used to help predict new MOF structures that should be effective for CO{sub 2} adsorption at low pressure. The team also showed that molecular modeling could be utilized to predict the hydrothermal stability of a given MOF. Finally, the team showed that low moisture level exposure actually enhanced the CO{sub 2} adsorption performance of a particular MOF, HKUST-1.

David A Lesch

2010-06-30T23:59:59.000Z

209

The effect of metal ions in MNaY-zeolites for the adsorptive removal of tetrahydrothiophene  

Science Journals Connector (OSTI)

The adsorptive removal of tetrahydrothiophene (THT) was carried out over transition...2 physisorption, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and X-ray diffraction were conducted to cha...

Yun Ha Kim; Hee Chul Woo; Doohwan Lee

2009-09-01T23:59:59.000Z

210

Metals removal during estuarine mixing of Arvand River water with the Persian Gulf water  

Science Journals Connector (OSTI)

In the present study, the removal of dissolved and colloidal Cd, Co, Cu, Ni and Zn in Arvand River water during estuarine mixing with the Persian Gulf water is investigated. The flocculation process was...

Abdolreza Karbassi; Gholam Reza Nabi Bidhendi

2010-12-01T23:59:59.000Z

211

Algal growth potentials and heavy-metal concentrations of the primary streams to upper Beaver Lake. Technical completion report  

SciTech Connect (OSTI)

Algal-growth potential was inhibited by heavy metals in upper Beaver Lake, Arkansas. Upper Beaver Lake receives water from three tributaries. One contains a small reservoir and the combined streams receive sewage input. Collections were made approximately monthly at eight sites for the Algal Assay Bottle Test (AABT) and heavy-metal analysis. In general, AABT results indicated that the collections above the sewage input were phosphorus-limited while those below were nitrogen- or combined nitrogen- and phosphorus-limited. Growth inhibition occurred during summer and early fall at various sites with greater inhibition at the confluence of the streams. No inhibitions occurred at the site below the sewage input. Heavy-metal concentrations had an overall tendency to increase downstream. Values within the small reservoir were 50-100% higher than in the feeder stream. Highest values of Pb were observed below the reservoir. SO/sub 4/, Cl, Mg, Ca, Na and K had high values during low flow in August-October. Mn, Pb, and Fe exceeded EPA-recommended standards for drinking water.

Meyer, R.L.; Green, W.R.; Steele, K.F.; Wickliff, D.

1986-06-01T23:59:59.000Z

212

The Relationship Between Heavy Metal (Cd, Co, Cu, Ni and Pb) Levels and the Size of Benthic, Benthopelagic and Pelagic Fish Species, Persian Gulf  

Science Journals Connector (OSTI)

The concentration of heavy metals was determined in tissues of sole (Euryglossa orientalis), mullet (Liza abu) and croacker fish (Johnius belangerii) from Musa estuary. Generally, the highest concentration of the...

Fazel Abdolahpur Monikh; Alireza Safahieh

2013-06-01T23:59:59.000Z

213

Polishing of synthetic electroplating wastewater in microcosm upflow constructed wetlands: Metals removal mechanisms  

E-Print Network [OSTI]

Polishing of synthetic electroplating wastewater in microcosm upflow constructed wetlands: Metals in microcosm upflow constructed wetlands used for polishing of synthetic electroplating wastewater. Four types (2014) 53-42" DOI : 10.1016/j.cej.2013.12.075 #12;Keywords electroplating wastewater, metals, cyanides

Paris-Sud XI, Université de

214

Isolation of heavy metal influx to the Cookeville sanitary sewer system and impact on municipal sludge management  

SciTech Connect (OSTI)

The city of Cookeville, Tennessee, has been experiencing problems with municipal sludge management. Of particular concern was the high concentration of regulated trace metals in the sludge. Primarily, cadmium limited the amount of sludge which was spread on the available cropland in 1985. The purpose of this project was to determine the major sources of heavy metal influx to the city's sanitary sewer system and the potential effects of heavy metals on sludge management. In general, the findings of the study indicate that city enforcement of existing State of Tennessee and city industrial pretreatment requirements will most likely extend the useful life of the currently available 388 ha land application sites to as much as ten years for certain sites. Cadmium governed the annual sludge application rates to the agricultural land. One plating industry discharged over 90% of the cadmium, copper, nickel, and zinc mass to the sanitary sewer. In addition, during 1986, the average concentration of most of the trace metals monitored in the municipal sludge deceased from levels reported in 1985.

George, D.B.; Borup, M.B.; Adams, V.D.; Prehn, M.P. (Tennessee Technological Univ., Cookeville (USA))

1989-04-01T23:59:59.000Z

215

In situ removal of contamination from soil  

DOE Patents [OSTI]

A process of remediation of cationic heavy metal contamination from soil utilizes gas phase manipulation to inhibit biodegradation of a chelating agent that is used in an electrokinesis process to remove the contamination. The process also uses further gas phase manipulation to stimulate biodegradation of the chelating agent after the contamination has been removed. The process ensures that the chelating agent is not attacked by bioorganisms in the soil prior to removal of the contamination, and that the chelating agent does not remain as a new contaminant after the process is completed. 5 figs.

Lindgren, E.R.; Brady, P.V.

1997-10-14T23:59:59.000Z

216

INVESTIGATION OF MIXED METAL SORBENT/CATALYSTS FOR THE SIMULTANEOUS REMOVAL OF SULFUR AND NITROGEN OXIDES  

SciTech Connect (OSTI)

Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. The work done at PETC and the DOE-funded investigation of the investigators on the sulfation and regeneration of alumina-supported cerium oxide sorbents have shown that they can perform well at relatively high temperatures (823-900 K) as regenerable desulfurization sorbents. Survey of the recent literature shows that addition of copper oxide to ceria lowers the sulfation temperature of ceria down to 773 K, sulfated ceria-based sorbents can function as selective SCR catalysts even at elevated temperatures, SO{sub 2} can be directly reduced to sulfur by CO on CuO-ceria catalysts, and ceria-based catalysts may have a potential for selective catalytic reduction of NO{sub x} by methane. These observations indicate a possibility of developing a ceria-based sorbent/catalyst which can remove both SO{sub 2} and NO{sub x} from flue gases within a relatively wide temperature window, produce significant amounts of elemental sulfur during regeneration, and use methane for the selective catalytic reduction of NO{sub x}. The objective of this research is to conduct kinetic and parametric studies of the selective catalytic reduction of NO{sub x} with NH{sub 3} and CH{sub 4} over alumina-supported cerium oxide and copper oxide-cerium oxide sorbent/catalysts; investigate SO{sub 2} removal at lower temperatures by supported copper oxide-cerium oxide sorbents; and investigate the possibility of elemental sulfur production during regeneration with CO or with CH{sub 4}-air mixtures.

Ates Akyurtlu; Jale F. Akyurtlu

2000-04-10T23:59:59.000Z

217

INVESTIGATION OF MIXED METAL SORBENT/CATALYSTS FOR THE SIMULTANEOUS REMOVAL OF SULFUR AND NITROGEN OXIDES  

SciTech Connect (OSTI)

Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. The work done at PETC and the DOE-funded research of the investigators on the sulfation and regeneration of alumina-supported cerium oxide sorbents have shown that they can perform well at relatively high temperatures (823-900 K) as regenerable desulfurization sorbents. Survey of the recent literature shows that addition of copper oxide to ceria lowers the sulfation temperature of ceria down to 773 K, sulfated ceria-based sorbents can function as selective SCR catalysts even at elevated temperatures, SO{sub 2} can be directly reduced to sulfur by CO on CuO-ceria catalysts, and ceria-based catalysts may have a potential for selective catalytic reduction of NO{sub x} by methane. These observations indicate a possibility of developing a ceria-based sorbent/catalyst which can remove both SO{sub 2} and NO{sub x} from flue gases within a relatively wide temperature window, produce significant amounts of elemental sulfur during regeneration, and use methane for the selective catalytic reduction of NO{sub x}. The objective of this research is to conduct kinetic and parametric studies of the selective catalytic reduction of NO{sub x} with NH{sub 3} and CH{sub 4} over alumina-supported cerium oxide and copper oxide-cerium oxide sorbent/catalysts; investigate SO{sub 2} removal at lower temperatures by supported copper oxide-cerium oxide sorbents; and investigate the possibility of elemental sulfur production during regeneration with CO or with CH{sub 4} air mixtures.

Ates Akyurtlu; Jale F. Akyurtlu

1999-11-30T23:59:59.000Z

218

Investigation of mixed metal sorbent/catalysts for the simultaneous removal of sulfur and nitrogen oxides  

SciTech Connect (OSTI)

Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. The work done at PETC and the DOE-funded investigation of the investigators on the sulfation and regeneration of alumina-supported cerium oxide sorbents have shown that they can perform well at relatively high temperatures (823-900 K) as regenerable desulfurization sorbents. Survey of the recent literature shows that addition of copper oxide to ceria lowers the sulfation temperature of ceria down to 773 K, sulfated ceria-based sorbents can function as selective SCR catalysts even at elevated temperatures, SO{sub 2} can be directly reduced to sulfur by CO on CuO-ceria catalysts, and ceria-based catalysts may have a potential for selective catalytic reduction of NO{sub x} by methane. These observations indicate a possibility of developing a ceria-based sorbent/catalyst which can remove both SO{sub 2} and NO{sub x} from flue gases within a relatively wide temperature window, produce significant amounts of elemental sulfur during regeneration, and use methane for the selective catalytic reduction of NO{sub x}. The objective of this research is to conduct kinetic and parametric studies of the selective catalytic reduction of NO{sub x} with NH{sub 3} and CH{sub 4} over alumina-supported cerium oxide and copper oxide-cerium oxide sorbent/catalysts; investigate SO{sub 2} removal at lower temperatures by supported copper oxide-cerium oxide sorbents; and investigate the possibility of elemental sulfur production during regeneration with CO or with CH{sub 4}-air mixtures.

Akyurtlu, A.; Akyurtlu, J.F.

1999-03-31T23:59:59.000Z

219

Removal of Technetium, Carbon Tetrachloride, and Metals from DOE Properties - Final Report  

SciTech Connect (OSTI)

This research is a three year project involving close collaboration between chemists at Pennsylvania State University and materials scientists at Pacific Northwest National Laboratory (PNNL). The goal of the project is the development and characterization of supported reducing agents, and solid waste forms derived from them, which will be effective in remediation of aqueous wastes. The work follows the recent discovery that zero-valent metals, such as iron, are effective decontaminants for waste streams containing chlorinated hydrocarbons. Preliminary data, obtained at Penn State and elsewhere, have shown that the same strategy will be effective in reducing soluble compounds containing toxic metals (technetium, lead, mercury, and chromium) to insoluble forms. The Penn State group has prepared a new class of powerful reducing agents, called Ferragels, which consist of finely divided zero-valent metals on high surface area supports. Because the rate of the surface oxidation-reduction reaction depends on available surface area, Ferragels are more effective in every case tested to date than unsupported metals. The project will further develop and investigate the application of these composite materials to problems relevant to the DOE-EM mission, namely the detoxification of waste streams containing technetium, carbon tetrachloride, and toxic metal ions. The Penn State group will work closely with the PNNL group to prepare materials that are compatible with the highly corrosive liquid fraction of Hanford site tank waste, to conduct tests with waste simulants containing technetium, and to formulate and characterize vitrified waste forms derived from these materials.

Mallouk, Thomas E.

2000-09-01T23:59:59.000Z

220

Effects of Adding Sewage Sludge and Urea-Phosphate Fertilizers to the Great Sippewissett Salt Marsh, Falmouth, MA on Heavy Metals and Microbial N-Cycling  

E-Print Network [OSTI]

Effects of Adding Sewage Sludge and Urea-Phosphate Fertilizers to the Great Sippewissett Salt Marsh in sludge form. Metals were not found to inhibit nitrification nor denitrification. Neither fertilizer nor, microbes, nitrogen cycle, sewage sludge, urea phosphate fertilizer, heavy metals INTRODUCTION Pollution

Vallino, Joseph J.

Note: This page contains sample records for the topic "heavy metals removal" 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

ENHANCEMENT OF HEAT REMOVAL USING CONCAVE LIQUID METAL TARGETS FOR HIGH-POWER ACCELERATORS  

E-Print Network [OSTI]

areas for the production of intense beams of secondary particles (IFMIF, SNS, RIA, LHC). The energy metal flow targets can be useful for future accelerator projects such as RIA, SNS, and ILC [1 dump areas for the production of intense beams of secondary particles. The severe constraints arising

Harilal, S. S.

222

Metal oxide enhanced microfiltration for the selective removal of Co and Sr ions from nuclear laundry wastewater  

Science Journals Connector (OSTI)

Abstract The present study investigated the potential use of a hybridized adsorption/microfiltration system for the selective removal of hazardous cobalt and strontium ions from nuclear power plant laundry wastewater, which is essential for managing low-level radioactive wastes. A crystalline silicotitanate (CST) and four different iron oxides were fabricated and used as adsorbents, which had different crystal structures and adsorptive mechanisms, such as ion exchange and surface coordination. CST showed the greatest affinity for Co and Sr ions (e.g., the Freundlich isotherm constant, KF=23.5mg/g and 33.9mg/g, respectively, at pH 7) and its adsorption capacity was independent of solution pH (pH 59), whereas the iron oxides removed substantive amounts of Co ions at neutral and alkaline pH levels, but only marginal amounts of strontium. Background species (e.g., K+, Na+, Ca2+, and Mg2+) had no significant impact on the affinities of the adsorbents for Co and Sr ions. The selectivity coefficients of CST for both Co and Sr ions ranged from 3 to 130. CST and ferrihydrite adsorbents were successfully regenerated using NaCl and \\{HCl\\} solutions, respectively, and their post-regeneration adsorption capacities were unchanged without any sign of significant inactivation after multiple adsorption and regeneration cycles. The addition of adsorbents to the microfiltration system enhanced the membrane permeability (>30%), probably because the cobalt species were removed prior to precipitation at the membrane surface. Substantial and stable metal removals (>90% for both Co and Sr) were achieved during 50h of continuous system operations.

Nuwan A. Weerasekara; Kwang-Ho Choo; Sang-June Choi

2013-01-01T23:59:59.000Z

223

Speciation study of the heavy metals in commercially available recharge cards coatings in Nigeria and the health implication  

Science Journals Connector (OSTI)

Abstract This work assessed levels of heavy metals exposure from silver coatings of mobile phones recharge cards of three major companies (designated as A, B and C) with price denominations 100, 200 and 400 from companies A, B and C respectively, which were carefully scratched using a plastic scraper into a glass tube. The coatings were acid digested for total metal concentration, while speciation experiment for Mn, Cu, Cd and Pb was carried out. Total metals and speciation analysis were done using AAS and XRF techniques. The total metal concentration from XRF analysis was in the range: Ca (702140?g/g), K (204930?g/g), Sc (80270?g/g), Ti (153012,580?g/g), Fe (506660?g/g), Ni (202040?g/g), Cu (20850?g/g) and Zn (40460?g/g). Cr had the lowest concentration (10?g/g) in A ( 400) while Ti had the highest concentration (12,580?g/g) in C ( 500) for all the coatings analyzed. AAS and XRF results agreed closely except for Fe with higher concentration. A ( 100) contained high concentration of the metals compared with others. Speciation study identified Mn as the most mobile element when present in the environment.

Abolanle S. Adekunle; John A.O. Oyekunle; Suliat O. Baruwa; Aderemi O. Ogunfowokan; Eno E. Ebenso

2014-01-01T23:59:59.000Z

224

Sorption Capacity of Mesoporous Metal Oxides for the Removal of MCPA from Polluted Waters  

Science Journals Connector (OSTI)

where qe and q are the amount of herbicide sorbed (?mol kg?1) at equilibrium and at time t, respectively, Ka is the rate constant of sorption (min?1) and t is the time (min). ... The sorbing capacity for Zn and Cu was strongly influenced by Cr(III), whereas the sorbing capacity of for(III) was not affected by the presence of the other two metals. ...

Veria Addorisio; Serena Esposito; Filomena Sannino

2010-03-24T23:59:59.000Z

225

Determination of metals in heavy oil residues by inductively coupled plasma atomic emission spectroscopy  

Science Journals Connector (OSTI)

A method is proposed for the sample preparation of heavy oil residues characterized by viscosity of more than 700 mm2/sec at 100C to study their elemental composition. It is shown that a wide range of elements c...

T. A. Maryutina; N. S. Musina

2012-10-01T23:59:59.000Z

226

Survey on ionic liquids effect based on metal anions over the thermal stability of heavy oil  

Science Journals Connector (OSTI)

A survey on the effect of ionic liquids (ILs) over the thermal stability of a heavy Mexican oil was performed. ILs used were based on [Cnim]+ and [Cnpyr]+ organic cations with FeCl 4 ...

J. A. Murillo-Hernndez; S. Lpez-Ramrez

2009-01-01T23:59:59.000Z

227

Copper Removal from A-01 Outfall by Ion Exchange  

SciTech Connect (OSTI)

Chelex100, a commercially available ion exchange resin, has been identified in this study as having a significant affinity for copper and zinc in the A-01 outfall water. Removal of copper and zinc from A-01 outfall water will ensure that the outfall meets the state of South Carolina's limit on these heavy metals.

Oji, L.N.

1999-02-17T23:59:59.000Z

228

Crystal Structure of Escherichia coli CusC the Outer Membrane Component of a Heavy Metal Efflux Pump  

SciTech Connect (OSTI)

While copper has essential functions as an enzymatic co-factor, excess copper ions are toxic for cells, necessitating mechanisms for regulating its levels. The cusCBFA operon of E. coli encodes a four-component efflux pump dedicated to the extrusion of Cu(I) and Ag(I) ions. We have solved the X-ray crystal structure of CusC, the outer membrane component of the Cus heavy metal efflux pump, to 2.3 {angstrom} resolution. The structure has the largest extracellular opening of any outer membrane factor (OMF) protein and suggests, for the first time, the presence of a tri-acylated N-terminal lipid anchor. The CusC protein does not have any obvious features that would make it specific for metal ions, suggesting that the narrow substrate specificity of the pump is provided by other components of the pump, most likely by the inner membrane component CusA.

R Kulathila; R Kulathila; M Indic; B van den Berg

2011-12-31T23:59:59.000Z

229

Heavy metals' content of automotive shredder residues (ASR): Evaluation of environmental risk  

Science Journals Connector (OSTI)

Every year between 8 and 9 millions of vehicles in the European Union arrive to their end of life. Car wastes can have a very high metal content, falling into hazardous waste class. A preliminary evaluation of these wastes could be made by metals' leaching test runs which is the main objective of the present study. Evaluation of the total metal content was carried out by X-ray fluorescence and the mobility of these metals using two simple standardized extractions such as the TCLP (Toxicity Characterisation Leaching Procedure) of the US EPA and the German leaching test DIN 38414S4. Additionally, an extraction test with acetone was performed in order to recognise metals bounded to organic matter. The results show that the total metal content of the ASR can overpass the established values for inert residues. Lead and zinc contents are fairly well correlated with grain-size, whilst other metals' contents do not exhibit clear grain-size dependence.

O. Gonzalez-Fernandez; M. Hidalgo; E. Margui; M.L. Carvalho; I. Queralt

2008-01-01T23:59:59.000Z

230

The Influence of Metal Pollution on the Immune System A Potential Stressor for Marine Mammals in the North Sea  

E-Print Network [OSTI]

2003). Heavy metals in marine mammals, Toxicology of Marineand thymocytes to heavy metals. Environmental Toxicology and

Kakuschke, Antje; Prange, Andreas

2007-01-01T23:59:59.000Z

231

Methods for producing hydrogen (BI) sulfide and/or removing metals  

DOE Patents [OSTI]

The present invention is a process wherein sulfide production by bacteria is efficiently turned on and off, using pH adjustment. The adjustment of pH impacts sulfide production by bacteria by altering the relative amounts of H.sub.2 S and HS-- in solution and thereby control the inhibition of the bacterial metabolism that produces sulfide. This process can be used to make a bioreactor produce sulfide "on-demand" so that the production of sulfide can be matched to its use as a metal precipitation reagent. The present invention is of significance because it enables the use of a biological reactor, a cost effective sulfide production system, by making the biological reactor produce hydrogen sulfide "on demand", and therefore responsive to production schedules, waste stream generation rate, and health and safety requirements/goals.

Truex, Michael J [Richland, WA; Peyton, Brent M [Pullman, WA; Toth, James J [Kennewick, WA

2002-05-14T23:59:59.000Z

232

Study of colloidal content and associated heavy metals in landfill leachate: a case study of El-Akader landfill site: Jordan  

Science Journals Connector (OSTI)

Landfill leachate samples were collected anaerobically at six locations at the El-Akader landfill site in North Jordan. The collected leachate samples were separated into size fractions with special attention to the distribution of colloids and associated heavy metals. The fraction sizes were 1.2 µm. The maximum concentrations of heavy metals in the analysed leachate samples were Cd 0.6 µg/l, Ni 25 µg/l, Zn 245 µg/l, Cu 15 µg/l and Pb 2.50 µg/l. In the dissolved particular matter the heavy metals concentration ranges were Cd 0.1??1.1 µg/l, Ni 0.35??1.5 µg/l, Zn 85??105 µg/l, Cu 0??0.95 µg/l and Pb 0.5??2.5 µg/l.

Y. Abu-Rukah

2005-01-01T23:59:59.000Z

233

CuZnAl mixed metal oxides derived from hydroxycarbonate precursors for H2S removal at low temperature  

Science Journals Connector (OSTI)

One series of CuZn and two series of CuZnAl hydroxycarbonate precursors with varying metal molar ratios were prepared via co-precipitation or multi-precipitation method, and the mixed metal oxides obtained by calcination of the precursor materials were used as adsorbents for H2S removal in the range of 25100C. The results of H2S adsorption tests showed that these mixed oxides, especially two series of CuZnAl mixed metal oxides exhibited markedly high breakthrough sulfur capacities (ranging from 4.4 to 25.7gS/100g-sorbent with increase of Cu/Zn molar ratio) at 40C. Incorporation Cu and/or Al decreased the mean crystalline sizes of ZnO and CuO species in the CuZn and CuZnAl mixed metal oxide adsorbents by decreasing of mean crystalline sizes of hydroxycarbanate phases mainly including hydrozincite, aurichalcite and malachite, segregation of Al phase, etc. Higher breakthrough sulfur capacity of each adsorbent in two ternary series than that of the corresponding adsorbent in binary series should be ascribed to the enhancement of the dispersion of ZnO and/or CuO species with incorporation of aluminum, thereby increasing the overall rate of reaction between the adsorbent and H2S by reducing the thickness of potential sulfide shell on the outer layer of the oxide crystalline grains and increasing the area of the interface for the exchange of HS?/S2? and O2?. For each series of adsorbents, the breakthrough sulfur capacity increased with the increase of Cu/Zn molar ratio regardless of changes of the dispersion of CuO and/or ZnO. This phenomenon might be mainly attributed to faster rate of the lattice diffusion of HS?, S2? and O2? or exchange of HS?/S2? and O2? during the sulfidation of CuO than that during the sulfidation of ZnO due to less rearrangement of the anion lattice.

Dahao Jiang; Lianghu Su; Lei Ma; Nan Yao; Xiaoliang Xu; Haodong Tang; Xiaonian Li

2010-01-01T23:59:59.000Z

234

FIELD DEMONSTRATION OF A MEMBRANE PROCESS TO RECOVER HEAVY HYDROCARBONS AND TO REMOVE WATER FROM NATURAL GAS  

SciTech Connect (OSTI)

The objective of this project is to design, construct and field demonstrate a 3-MMscfd membrane system to recover natural gas liquids (NGL) and remove water from raw natural gas. An extended field test to demonstrate system performance under real-world conditions is required to convince industry users of the efficiency and reliability of the process. The system will be designed and fabricated by Membrane Technology and Research, Inc. (MTR) and then installed and operated at British Petroleum (BP)-Amoco's Pascagoula, MS plant. The Gas Research Institute will partially support the field demonstration and BP-Amoco will help install the unit and provide onsite operators and utilities. The gas processed by the membrane system will meet pipeline specifications for dewpoint and Btu value and can be delivered without further treatment to the pipeline. Based on data from prior membrane module tests, the process is likely to be significantly less expensive than glycol dehydration followed by propane refrigeration, the principal competitive technology. At the end of this demonstration project the process will be ready for commercialization. The route to commercialization will be developed during this project and may involve collaboration with other companies already servicing the natural gas processing industry.

K.A. Lokhandwala; T. Hofmann; J. Kaschemekat; C. Bailey; M. Jacobs; R. Baker; Membrane Group

2000-04-04T23:59:59.000Z

235

FIELD DEMONSTRATION OF A MEMBRANE PROCESS TO RECOVER HEAVY HYDROCARBONS AND TO REMOVE WATER FROM NATURAL GAS  

SciTech Connect (OSTI)

The objective of this project is to design, construct and field demonstrate a 3-MMscfd membrane system to recover natural gas liquids (NGL) and remove water from raw natural gas. An extended field test to demonstrate system performance under real-world conditions is required to convince industry users of the efficiency and reliability of the process. The system will be designed and fabricated by Membrane Technology and Research, Inc. (MTR) and then installed and operated at British Petroleum (BP)-Amoco's Pascagoula, MS plant. The Gas Research Institute will partially support the field demonstration and BP-Amoco will help install the unit and provide onsite operators and utilities. The gas processed by the membrane system will meet pipeline specifications for dewpoint and Btu value and can be delivered without further treatment to the pipeline. Based on data from prior membrane module tests, the process is likely to be significantly less expensive than glycol dehydration followed by propane refrigeration, the principal competitive technology. At the end of this demonstration project the process will be ready for commercialization. The route to commercialization will be developed during this project and may involve collaboration with other companies already servicing the natural gas processing industry.

R. Baker; T. Hofmann; J. Kaschemekat; K.A. Lokhandwala; Membrane Group; Module Group; Systems Group

2001-01-11T23:59:59.000Z

236

MOVEMENT OF HEAVY METALS THROUGH UNDISTURBED AND HOMOGENIZED SOIL COLUMNS Vincent J. Camobreco , Brian K. Richards , Tammo S. Steenhuis , John H. Peverly , and Murray B. McBride1 1* 1 2 2  

E-Print Network [OSTI]

OF HEAVY METALS ..." 2 INTRODUCTION The application of sewage sludge to land is, in principle, an effective 161:740-750 1996 ABSTRACT Soils accumulate heavy metals when sewage sludge is applied to land, such as Cd, Zn, Cu, Ni, Cr and Pb, is the most critical long-term hazard when applying sludge to land (Logan

Walter, M.Todd

237

Heavy metal concentrations in soils of five United States cities, 1972 urban soils monitoring program  

SciTech Connect (OSTI)

Research report:Lead, mercury, cadmium, and arsenic levels detected in soil samples taken from five U.S. cities are reported. Cities studied were: Des Moines, Iowa; Fitchburg, Mass.; Lake Charles, La.; Reading, Pa.; and Pittsburgh. In all cities except Fitchburg, urban soils had higher concentrations of the metals than suburban soils had. Higher metals concentrations in urban soil are attributed to atmospheric fallout of aerosols from industrial processes and fossil fuel burning. (26 references, 2 tables)

Carey, A.E.; Gowen, J.A.; Forehand, T.J.; Tai, H.; Wiersma, G.B.

1980-03-01T23:59:59.000Z

238

Removal of organic compounds and trace metals from oil sands process-affected water using zero valent iron enhanced by petroleum coke  

Science Journals Connector (OSTI)

Abstract The oil production generates large volumes of oil sands process-affected water (OSPW), referring to the water that has been in contact with oil sands or released from tailings deposits. There are concerns about the environmental impacts of the release of OSPW because of its toxicity. Zero valent iron alone (ZVI) and in combination with petroleum coke (CZVI) were investigated as environmentally friendly treatment processes for the removal of naphthenic acids (NAs), acid-extractable fraction (AEF), fluorophore organic compounds, and trace metals from OSPW. While the application of 25g/L ZVI to OSPW resulted in 58.4% removal of \\{NAs\\} in the presence of oxygen, the addition of 25g petroleum coke (PC) as an electron conductor enhanced the \\{NAs\\} removal up to 90.9%. The increase in ZVI concentration enhanced the removals of NAs, AEF, and fluorophore compounds from OSPW. It was suggested that the electrons generated from the oxidation of ZVI were transferred to oxygen, resulting in the production of hydroxyl radicals and oxidation of NAs. When OSPW was de-oxygenated, the \\{NAs\\} removal decreased to 17.5% and 65.4% during treatment with ZVI and CZVI, respectively. The removal of metals in ZVI samples was similar to that obtained during CZVI treatment. Although an increase in ZVI concentration did not enhance the removal of metals, their concentrations effectively decreased at all ZVI loadings. The Microtox bioassay with Vibrio fischeri showed a decrease in the toxicity of ZVI- and CZVI-treated OSPW. The results obtained in this study showed that the application of ZVI in combination with PC is a promising technology for OSPW treatment.

Parastoo Pourrezaei; Alla Alpatova; Kambiz Khosravi; Przemys?aw Drzewicz; Yuan Chen; Pamela Chelme-Ayala; Mohamed Gamal El-Din

2014-01-01T23:59:59.000Z

239

Heat removal aspects of Liquid Metal Fast Breeder Reactor safety in light of the Three Mile Island incident  

SciTech Connect (OSTI)

The safety aspects of the Liquid Metal Fast Breeder Reactor (LMFBR) loop design are compared with those of the Light Water Reactor (LWR), in light of the Three Mile Island (TMI) incident. The events at TMI are briefly described, the fundamental differences between the LWR water coolant and the LMFBR sodium coolant are presented, and the design of analogous LMFBR safety systems under similar events as those at TMI is discussed. A preliminary qualitative evaluation of a TMI-equivalent accident for an LMFBR indicates that there is likely to be: (1) negligible pressure transients in the primary loop, (2) no core damage, (3) isolation of the incident at the steam generator, and (4) no radiation release to the environment, except a negligible amount of tritium from the secondary sodium. Furthermore, with the absence of the ECCS (Emergency Core Cooling System), pressurizer, and other pressure-related components in the LMFBR design, operator action for a LMFBR should be much simpler in dealing with the coolant upset condition and the decay heat removal problems.

Victor, H.R.; Graf, D.G.

1980-12-01T23:59:59.000Z

240

Electrospun and oxidized cellulose materials for environmental remediation of heavy metals in groundwater  

SciTech Connect (OSTI)

This chapter focuses on the use of modified cellulosic materials in the field of environmental remediation. Two different chemical methods were involved in fabricating oxidized cellulose (OC), which has shown promise as a metal ion chelator in environmental applications. Electrospinning was utilized to introduce a more porous structure into an oxidized cellulose matrix. FTIR and Raman spectroscopy were used to study both the formation of OC and its surface complexation with metal ions. IR and Raman spectroscopic data demonstrate the formation of characteristic carboxylic groups in the structure of the final products and the successful formation of OC-metal complexes. Subsequent field tests at the Field Research Site at Oak Ridge National Laboratory confirmed the value of OC for sorption of both U and Th ions.

Han, Dong [Stony Brook University (SUNY); Halada, Gary P. [Stony Brook University (SUNY); Spalding, Brian Patrick [ORNL; Brooks, Scott C [ORNL

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Treatment of produced water by simultaneous removal of heavy metals and dissolved polycyclic aromatic hydrocarbons in a photoelectrochemical cell.  

E-Print Network [OSTI]

??Early produced water treatment technologies were developed before carbon dioxide emissions and hazardous waste discharge were recognised as operational priority. These technologies are deficient in (more)

Igunnu, Ebenezer Temitope

2014-01-01T23:59:59.000Z

242

Declining metal levels at Foundry Cove (Hudson River, New York): Response to localized dredging of contaminated sediments  

E-Print Network [OSTI]

a well-recognized case of heavy metal pollution at Foundry Cove (FC), Hudson River, New York. This tidal River. ? 2007 Elsevier Ltd. All rights reserved. Keywords: River pollution; Cadmium; Metal removalDeclining metal levels at Foundry Cove (Hudson River, New York): Response to localized dredging

Levinton, Jeffrey

243

Magnetism and superconductivity driven by identical 4f states in a heavy-fermion metal  

SciTech Connect (OSTI)

The apparently inimical relationship between magnetism and superconductivity has come under increasing scrutiny in a wide range of material classes, where the free energy landscape conspires to bring them in close proximity to each other. Particularly enigmatic is the case when these phases microscopically interpenetrate, though the manner in which this can be accomplished remains to be fully comprehended. Here, we present combined measurements of elastic neutron scattering, magnetotransport, and heat capacity on a prototypical heavy fermion system, in which antiferromagnetism and superconductivity are observed. Monitoring the response of these states to the presence of the other, as well as to external thermal and magnetic perturbations, points to the possibility that they emerge from different parts of the Fermi surface. Therefore, a single 4f state could be both localized and itinerant, thus accounting for the coexistence of magnetism and superconductivity.

Thompson, Joe E [Los Alamos National Laboratory; Nair, S [MAX PLANCK INST.; Stockert, O [MAX PLANCK INST.; Witte, U [INST. FUR FESTKORPERPHYSIK; Nicklas, M [MAX PLANCK INST.; Schedler, R [HELMHOLTZ - ZENTRUM; Bianchi, A [UC, IRVINE; Fisk, Z [UC, IRVINE; Wirth, S [MAX PLANCK INST.; Steglich, K [HELMHOLTZ - ZENTRUM

2009-01-01T23:59:59.000Z

244

Levels of metals from salt marsh plants from Southern California, USA  

E-Print Network [OSTI]

sedimentary record of heavy metal pollution in the lagoon ofcapacity for heavy metals. Environmental Pollution, 146,heavy metals in experimental salt marsh ecosystems. Environmental Pollution,

Hoyt, Kimberly Ann

2009-01-01T23:59:59.000Z

245

Bioavailability of Cadmium and Zin to Two Earthworm Species in High-metal Soils  

E-Print Network [OSTI]

tolerance capacity for heavy metals pollution (Dez-Ortiz etof heavy metals in soils. Environmental Pollution 113, 135-heavy metals in terrestrial invertebrates. Environmental Pollution

Liu, Ying

2012-01-01T23:59:59.000Z

246

Upgrading of petroleum oil feedstocks using alkali metals and hydrocarbons  

DOE Patents [OSTI]

A method of upgrading an oil feedstock by removing heteroatoms and/or one or more heavy metals from the oil feedstock composition. This method reacts the oil feedstock with an alkali metal and an upgradant hydrocarbon. The alkali metal reacts with a portion of the heteroatoms and/or one or more heavy metals to form an inorganic phase separable from the organic oil feedstock material. The upgradant hydrocarbon bonds to the oil feedstock material and increases the number of carbon atoms in the product. This increase in the number of carbon atoms of the product increases the energy value of the resulting oil feedstock.

Gordon, John Howard

2014-09-09T23:59:59.000Z

247

Studies on Materials for Heavy-Liquid-Metal-Cooled Reactors in Japan  

SciTech Connect (OSTI)

Recent studies on materials for the development of lead-bismuth (Pb-Bi)-cooled fast reactors (FR) and accelerator-driven sub-critical systems (ADS) in Japan are reported. The measurement of the neutron cross section of Bi to produce {sup 210}Po, the removal experiment of Po contamination and steel corrosion test in Pb-Bi flow were performed in Tokyo Institute of Technology. A target material corrosion test was performed in the project of Transmutation Experimental Facility for ADS in Japan Atomic Energy Research Institute (JAERI). Steel corrosion test was started in Mitsui Engineering and Shipbuilding Co., LTD (MES). The feasibility study for FR cycle performed in Japan Nuclear Cycle Institute (JNC) are described. (authors)

Minoru Takahashi; Masayuki Igashira; Toru Obara; Hiroshi Sekimoto [Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550 (Japan); Kenji Kikuchi [Japan Atomic Energy Research Institute (Japan); Kazumi Aoto [Japan Nuclear Cycle Development Institute (Japan); Teruaki Kitano [Mitsui Engineering and Shipbuilding Company Ltd., 6-4, Tsukiji 5-chome, Chuo-ku, Tokyo 104-8439 (Japan)

2002-07-01T23:59:59.000Z

248

[Task 1.] Biodenitrification of low nitrate solar pond waters using sequencing batch reactors. [Task 2.] Solidification/stabilization of high strength and biodenitrified heavy metal sludges with a Portland cement/flyash system  

SciTech Connect (OSTI)

Process wastewater and sludges were accumulated on site in solar evaporation ponds during operations at the Department of Energy's Rocky Flats Plant (DOE/RF). Because of the extensive use of nitric acid in the processing of actinide metals, the process wastewater has high concentrations of nitrate. Solar pond waters at DOE/RF contain 300-60,000 mg NO{sub 3}{sup {minus}}/L. Additionally, the pond waters contain varying concentrations of many other aqueous constituents, including heavy metals, alkali salts, carbonates, and low level radioactivity. Solids, both from chemical precipitation and soil material deposition, are also present. Options for ultimate disposal of the pond waters are currently being evaluated and include stabilization and solidification (S/S) by cementation. Removal of nitrates can enhance a wastes amenability to S/S, or can be a unit operation in another treatment scheme. Nitrate removal is also a concern for other sources of pollution at DOE/RF, including contaminated groundwater collected by interceptor trench systems. Finally, nitrate pollution is a problem at many other DOE facilities where actinide metals were processed. The primary objective of this investigation was to optimize biological denitrification of solar pond waters with nitrate concentrations of 300--2,100 mg NO{sub 3}{sup {minus}}/L to below the drinking water standard of 45 mg NO{sub 3}{sup {minus}}/L (10 mg N/L). The effect of pH upon process stability and denitrification rate was determined. In addition, the effect Cr(VI) on denitrification and fate of Cr(VI) in the presence of denitrifying bacteria was evaluated.

Figueroa, L.; Cook, N.E.; Siegrist, R.L.; Mosher, J.; Terry, S.; Canonico, S.

1995-09-22T23:59:59.000Z

249

Simple preparation of aminothiourea-modified chitosan as corrosion inhibitor and heavy metal ion adsorbent  

Science Journals Connector (OSTI)

Abstract By a simple and convenient method of using formaldehyde as linkages, two new chitosan (CS) derivatives modified respectively with thiosemicarbazide (TSFCS) and thiocarbohydrazide (TCFCS) were synthesized. The new compounds were characterized and studied by Fourier transform infrared spectroscopy, elemental analysis, thermal gravity analysis and differential scanning calorimetry, and their surface morphologies were determined via scanning electron microscopy. These CS derivatives could form pH dependent gels. The behavior of 304 steel in 2% acetic acid containing different inhibitors or different concentrations of inhibitor had been studied by potentiodynamic polarization test. The preliminary results show that the new compound TCFCS can act as a mixed-type metal anticorrosion inhibitor in some extent; its inhibition efficiency is 92% when the concentration was 60mg/L. The adsorption studies on a metal ion mixture aqueous solution show that two samples TSFCS and TCFCS can absorb As (V), Ni (II), Cu (II), Cd (II) and Pb (II) efficiently at pH 9 and 4.

Manlin Li; Juan Xu; Ronghua Li; Dongen Wang; Tianbao Li; Maosen Yuan; Jinyi Wang

2014-01-01T23:59:59.000Z

250

Lead removal by using carbon nanotubes  

Science Journals Connector (OSTI)

Exposure to lead (Pb) can cause anemia, diseases of the liver and kidneys, brain damage and ultimately death. For these reasons, heavy metals must be removed as much as possible from water. The removal of Pb (II) ions from aqueous solution using carbon nanotubes (CNT) as the adsorbent was investigated. The effects of pH were studied at 25C. Batch mode adsorption study has revealed that the removal of Pb (II) ions was maximum (85% removal) at pH 5 and achieved 83% removal at 40 mg/L of CNTs. The adsorption continuously increased in the pH range of 3-5, beyond which the adsorption could not be carried out due to the precipitation of metal. This study was also supported by characterisation of CNTs using FESEM. The characterisation suggested that at acidic condition (pH 5), the surfaces of CNTs are more aligned and well-integrated compared to CNTs at different pHs. Finally, it can be concluded that CNTs could be a potential adsorbent for the removal of Pb from wastewater.

A.A. Muataz; M. Fettouhi; A. Al-Mammum; N. Yahya

2009-01-01T23:59:59.000Z

251

Separation of heavy metals from industrial waste streams by membrane separation technology  

SciTech Connect (OSTI)

Industrial membrane technology is becoming increasingly attractive as a low-cost generic separation technique for volume reduction, recovery, and/or purification of the liquid phase and concentration and/or recovery of the contaminant or solute. It offers outstanding future potential in the reduction and/or recycling of hazardous pollutants from waste streams. Membrane separation technology may include: (1) commercial processes such as electrodialysis, reverse osmosis, nanofiltration, and ultrafiltration and (2) the development of hybrid processes such as liquid membranes, Donnan dialysis, and membrane bioreactor technology. Membrane separation technology as applied to waste treatment/reduction and environmental engineering problems has several advantages over conventional treatment processes. In contrast to distillation and solvent extraction membrane separation is achieved without a phase change and use of expensive solvents. The advantages of this technology are (1) low energy requirements; (2) small volumes of retentate that need to be handled; (3) selective removal of pollutants with the use of complexing agents and biocatalysts or by membrane surface modification; (4) the possibility for achieving zero discharge'' with reuse of product water, binding media and target, compounds; (5) continuous operation; (6) modular design without significant size limitations; (7) discrete membrane barrier to ensure physical separation of contaminants; and (8) minimal labor requirement.

Yichu Huang; Koseoglu, S.S. (Texas A and M Univ. System, College Station, TX (United States). Engineering Biosciences Research Center)

1993-01-01T23:59:59.000Z

252

Use of Sequential Injection Analysis to construct a Potentiometric Electronic Tongue: Application to the Multidetermination of Heavy Metals  

SciTech Connect (OSTI)

An automated potentiometric electronic tongue (ET) was developed for the quantitative determination of heavy metal mixtures. The Sequential Injection Analysis (SIA) technique was used in order to automate the obtaining of input data, and the combined response was modeled by means of Artificial Neural Networks (ANN). The sensor array was formed by four sensors: two based on chalcogenide glasses Cd sensor and Cu sensor, and the rest on poly(vinyl chloride) membranes Pb sensor and Zn sensor. The Ion Selective Electrode (ISE) sensors were first characterized with respect to one and two analytes, by means of high-dimensionality calibrations, thanks to the use of the automated flow system; this characterization enabled an interference study of great practical utility. To take profit of the dynamic nature of the sensor's response, the kinetic profile of each sensor was compacted by Fast Fourier Transform (FFT) and the extracted coefficients were used as inputs for the ANN in the multidetermination applications. In order to identify the ANN which provided the best model of the electrode responses, some of the network parameters were optimized. Finally analyses were performed employing synthetic samples and water samples of the river Ebro; obtained results were compared with reference methods.

Mimendia, Aitor; Merkoci, Arben; Valle, Manel del [Sensors and Biosensors Group, Chemistry Dept., Universitat Autonoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona (Spain); Legin, Andrey [Chemistry Dept, St. Petersburg University, Universitetskaya nab. 7/9, 199034 St. Petersburg (Russian Federation)

2009-05-23T23:59:59.000Z

253

Physiological responses of switchgrass (Panicum virgatum L.) to organic and inorganic amended heavy-metal contaminated chat tailings  

SciTech Connect (OSTI)

Study plots established at the Galena subsite of the Cherokee County Superfund Site in Southeastern Kansas by the US Bureau of Mines in 1990 were examined during the summer of 1996 to determine whether physiological criteria could be used to determine suitability of switchgrass for remediation of heavy-metal contaminated substrates. Switchgrass was chosen because it was the most frequently encountered species on these plots. Treatment plots included a treatment control, an organic residue treatment of 89.6 Mg Ha{sup {minus}1} composted cattle manure, and two inorganic fertilizer treatments recommended for either native grass or grass/legume mixtures. Plant response variables were photosynthetic rate, leaf conductance to water vapor, internal concentration of carbon dioxide in leaves, foliar transpiration rate, leaf water-use-efficiency, predawn leaf xylem water potential, and midday leaf xylem water potential. Predawn and midday xylem water potentials were higher for grass/legume inorganic treatment than for the other inorganic treatments. Leaf conductances were lower for organically treated plots than those plots not organically amended and both photosynthesis and transpiration were lower for organically treated plots. Leaf conductances and transpiration were higher for grass/legume treated plots than for plots lacking inorganic treatment. Water-use-efficiency was higher for native grass inorganically treated plots than for other inorganic treatments.

Youngman, A.L. [Wichita State Univ., KS (United States). Dept. of Biological Sciences

1997-12-31T23:59:59.000Z

254

Comparative evaluation of several small mammal species as monitors of heavy metals, radionuclides, and selected organic compounds in the environment  

SciTech Connect (OSTI)

The primary purpose of this study was to evaluate which small mammal species are the best monitors of specific environmental contaminants. The evaluation is based on the published literature and on an analysis of small mammals trapped at several sites on the Oak Ridge National Laboratory (ORNL) Reservation in Oak Ridge, Tennessee. Studies on the uptake of heavy metals, radionuclides, and organic chemicals are reviewed in Chapter II to evaluate several small mammal species for their capacity to serve as sentinels for the presence, accumulation, and effects of various contaminants. Where several species were present at a site, a comparative evaluation was made and species are ranked for their capacity to serve as monitors of specific contaminants. Food chain accumulation and food habits of the species are used to establish a relationship with suitability as a biomonitor. Tissue-specific concentration factors were noted in order to establish target tissues. Life histories, habitat, and food habits are reviewed in order to make generalizations concerning the ability of similar taxa to serve as biomonitor. Finally, the usefulness of several small mammal species as monitors of three contaminants -- benzo(a)pyrene, mercury, and strontium-90 -- present on or near the ORNL facilities was investigated. 133 refs., 5 figs., 20 tabs.

Talmage, S.S. (Tennessee Univ., Knoxville, TN (USA) Oak Ridge National Lab., TN (USA)); Walton, B.T. (Oak Ridge National Lab., TN (USA))

1990-08-01T23:59:59.000Z

255

Mobility of Source Zone Heavy Metals and Radionuclides: The Mixed Roles of Fermentative Activity on Fate and Transport of U and Cr. Final Report  

SciTech Connect (OSTI)

Various U. S. Department of Energy (DOE) low and medium-level radioactive waste sites contain mixtures of heavy metals, radionuclides and assorted organic materials. In addition, there are numerous sites around the world that are contaminated with a mixture of organic and inorganic contaminants. In most sites, over time, water infiltrates the wastes, and releases metals, radionuclides and other contaminants causing transport into the surrounding environment. We investigated the role of fermentative microorganisms in such sites that may control metal, radionuclide and organics migration from source zones. The project was initiated based on the following overarching hypothesis: Metals, radionuclides and other contaminants can be mobilized by infiltration of water into waste storage sites. Microbial communities of lignocellulose degrading and fermenting microorganisms present in the subsurface of contaminated DOE sites can significantly impact migration by directly reducing and immobilizing metals and radionuclides while degrading complex organic matter to low molecular weight organic compounds. These low molecular weight organic acids and alcohols can increase metal and radionuclide mobility by chelation (i.e., certain organic acids) or decrease mobility by stimulating respiratory metal reducing microorganisms. We demonstrated that fermentative organisms capable of affecting the fate of Cr6+, U6+ and trinitrotoluene can be isolated from organic-rich low level waste sites as well as from less organic rich subsurface environments. The mechanisms, pathways and extent of contaminant transformation depend on a variety of factors related to the type of organisms present, the aqueous chemistry as well as the geochemistry and mineralogy. This work provides observations and quantitative data across multiple scales that identify and predict the coupled effects of fermentative carbon and electron flow on the transport of radionuclides, heavy metals and organic contaminants in the subsurface; a primary concern of the DOE Environmental Remediation Science Division (ERSD) and Subsurface Geochemical Research (SBR) Program.

Gerlach, Robin [Montana State Univ., Bozeman, MT (United States); Peyton, Brent M. [Montana State Univ., Bozeman, MT (United States); Apel, William A. [Idaho National Lab., Idaho Falls, ID (United States)

2014-01-29T23:59:59.000Z

256

Heavy Element Abundances in Presolar Silicon Carbide Grains from Low-Metallicity AGB Stars  

E-Print Network [OSTI]

Primitive meteorites contain small amounts of presolar minerals that formed in the winds of evolved stars or in the ejecta of stellar explosions. Silicon carbide is the best studied presolar mineral. Based on its isotopic compositions it was divided into distinct populations that have different origins: Most abundant are the mainstream grains which are believed to come from 1.5-3 Msun AGB stars of roughly solar metallicitiy. The rare Y and Z grains are likely to come from 1.5-3 Msun AGB stars as well, but with subsolar metallicities (0.3-0.5x solar). Here we report on C and Si isotope and trace element (Zr, Ba) studies of individual, submicrometer-sized SiC grains. The most striking results are: (1) Zr and Ba concentrations are higher in Y and Z grains than in mainstream grains, with enrichments relative to Si and solar of up to 70x (Zr) and 170x (Ba), respectively. (2) For the Y and Z grains there is a positive correlation between Ba concentrations and amount of s-process Si. This correlation is well explain...

Hoppe, P; Vollmer, C; Groener, E; Heck, P R; Gallino, R; Amari, S; 10.1071/AS08033

2009-01-01T23:59:59.000Z

257

REVIEW PAPER How metal-tolerant ecotypes of ectomycorrhizal fungi  

E-Print Network [OSTI]

with open access at Springerlink.com Abstract & Introduction Heavy metal pollution is a strong driver for heavy metal-contaminated soils. Keywords Heavy metal pollution . Heavy metal tolerance . EctomycorrhizalREVIEW PAPER How metal-tolerant ecotypes of ectomycorrhizal fungi protect plants from heavy metal

Boyer, Edmond

258

Solidification/Stabilization of High Nitrate and Biodenitrified Heavy Metal Sludges with a Portland Cement/Flyash System  

SciTech Connect (OSTI)

Pond 207C at Rocky Flats Environmental Technology Site (RFETS) contains process wastewaters characterized by high levels of nitrates and other salts, heavy metal contamination, and low level alpha activity. The purpose of this research was to investigate the feasibility of treating a high-nitrate waste, contaminated with heavy metals, with a coupled dewateriug and S/S process, as well as to investigate the effects of biodenitrification pretreatment on the S/S process. Pond 207C residuals served as the target waste. A bench-scale treatability study was conducted to demonstrate an S/S process that would minimize final product volume without a significant decrease in contaminant stabilization or loss of desirable physical characteristics. The process formulation recommended as a result a previous S/S treatability study conducted on Pond 207C residuals was used as the baseline formulation for this research. Because the actual waste was unavailable due to difficulties associated with radioactive waste handling and storage, a surrogate waste, of known composition and representative of Pond 207C residuals, was used throughout this research. The contaminants of regulatory concern added to the surrogate were cadmium, chromium, nickel, and silver. Product volume reduction was achieved by dewatering the waste prior to S/S treatment. The surrogate was dewatered by evaporation at 60 to 80 C to total solids contents from 43% to 78% by weight, and treated with Portland cement and fly ash. Two cement to flyash ratios were tested, 2:1 and 1:2, by weight. Contaminant leachability testing was conducted with a 0.5 water to pozzolan (the cement/flyash mixture) ratio and both cement to flyash ratios. Each product was tested for unconfined compressive strength (UCS) and for contaminant leachability by the Toxicity Characteristics Leaching Procedure (TCLP). At the highest solids content achieved by dewatering, 78% solids by weight, the predicted final waste form volume f or Pond 207C residuals after S/S processing was reduced by over 60 A when compared to the baseline process. All tested process formulations produced final waste forms with an average UCS of 100 psi or greater. Percent fixation of Chrome (VI) increased at higher solids contents. Fixation of nickel varied from over 87% to 69%, and cadmium fixation was greater than 99% at every solids content tested. Silver TCLP extract concentrations were below detection limits in all cases except for one anomalous measurement. Final product volume reduction was not achieved with coupled dewatering and S/S processing after biodenitrification pretreatment. The waste slurry became too viscous to mix with reagents after dewatering to approximately 55% solids. Fixation of contaminant constituents and final product UCSs were similar to the results of S/S processing without biodenitrification. Due to the lack of volume reduction, biodenitrification was not successful as a pretreatment for S/S processing under the test conditions of this research.

Canonico, J.S.

1995-07-26T23:59:59.000Z

259

Polymer-supported sulfonated catechol and linear catechol amide ligands and their use in selective metal ion removal recovery from aqueous solutions  

DOE Patents [OSTI]

The present invention concerns the synthesis of several biomimetically important polymer-supported, sulfonated catechol (PS-CATS), sulfonated bis-catechol linear amide (PS-2-6-LICAMS) and sulfonated 3,3-linear tris-catechol amide (PS-3,3-LICAMS) ligands, which chemically bond to modified 6% crosslinked macroporous polystyrene-divinylbenzene beads (PS-DVB). These polymers are useful for the for selective removal and recovery of environmentally and economically important metal ions from aqueous solution, as a function of pH. The Fe{sup 3+} ion selectivity shown for PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads in competition with a similar concentration of Cu{sup 2+}, Zn{sup 2+}, Mn{sup 2+}, Ni{sup 2+}, Mg{sup 2+}, Al{sup 3+}, and Cr{sup 3+} ions at pH 1--3. Further, the metal ion selectivity is changed at higher pH values in the absence of Fe{sup 3+} (for example, Hg{sup 2+} at pH 3). The rates of selective removal and recovery of the trivalent metal ions, e.g. Fe{sup 3+}, Al{sup 3+} ion etc. with the PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads used determined are useful as well as equilibrium selectivity coefficient (K{sub m}) values for all metal competition studies. The chelate effect for the predisposed octahedral PS-3,3-LICAMS polymer pendant ligand is the reason that this ligand has a more pronounced selectivity for Fe{sup 3+} ion in comparison to the PS-CATS polymer beads. The predisposed square planar PS-2,6-LICAMS series of polymer pendant ligands are more selective to divalent metal ions Cu{sup 2+}, Zn{sup 2+}, Mn{sup 2+}, Ni{sup 2+}, and Mg{sup 2+}, than either PS-CATS or PS-3,3-LICAMS. However, Fe{sup 3+} ion still dominates in competition with other divalent and trivalent metal ions. In the absence of Fe{sup 3+}, the polymer ligand is selective for Al{sup 3+}, Cu{sup 2+} or Hg{sup 2+}. The changing of the cavity size from two CH{sub 2} groups to six CH{sub 2} groups in the PS-2-6-LICAMS polymer pendant ligand series does not effect the order of metal ion selectivity. 9 figs.

Fish, R.H.

1998-11-10T23:59:59.000Z

260

Polymer-supported sulfonated catechol and linear catechol amide ligands and their use in selective metal ion removal recovery from aqueous solutions  

DOE Patents [OSTI]

The present invention concerns the synthesis of several biomimetically important polymer-supported, sulfonated catechol (PS-CATS), sulfonated bis-catechol linear amide (PS-2-6-LICAMS) and sulfonated 3,3-linear tris-catechol amide (PS-3,3-LICAMS) ligands, which chemically bond to modified 6% crosslinked macroporous polystyrene-divinylbenzene beads (PS-DVB). These polymers are useful for the for selective removal and recovery of environmentally and economically important metal ions from aqueous solution, as a function of pH. The Fe.sup.3+ ion selectivity shown for PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads in competition with a similar concentration of Cu.sup.2+, Zn.sup.2+, Mn.sup.2+, Ni.sup.2+, Mg.sup.2+, Al.sup.3+, and Cr.sup.3+ ions at pH 1-3. Further, the metal ion selectivity is changed at higher pH values in the absence of Fe.sup.3+ (for example, Hg.sup.2+ at pH 3). The rates of selective removal and recovery of the trivalent metal ions, e.g. Fe.sup.3+ Al.sup.3+ ion etc. with the PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads used determined are useful as well as equilibrium selectivity coefficient (K.sub.m) values for all metal competition studies. The chelate effect for the predisposed octahedral PS-3,3-LICAMS polymer pendant ligand is the reason that this ligand has a more pronounced selectivity for Fe.sup.3+ ion in comparison to the PS-CATS polymer beads. The predisposed square planar PS-2,6-LICAMS series of polymer pendant ligands are more selective to divalent metal ions Cu.sup.2+, Zn.sup.2+, Mn.sup.2+, Ni.sup.2+, and Mg.sup.2+, than either PS-CATS or PS-3,3-LICAMS. However, Fe.sup.3+ ion still dominates in competition with other divalent and trivalent metal ions. In the absence of Fe.sup.3+, the polymer ligand is selective for Al.sup.3+, Cu.sup.2+ or Hg.sup.2+. The changing of the cavity size from two CH.sub.2 groups to six CH.sub.2 groups in the PS-2-6-LICAMS polymer pendant ligand series does not effect the order of metal ion selectivity.

Fish, Richard H. (Berkeley, CA)

1998-01-01T23:59:59.000Z

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261

Investigation of methods for the selective removal and characterization of transition metals associated with solids in the marine environment  

SciTech Connect (OSTI)

The operation of an OTEC plant will result in the mixing of large volumes of seawater from different depths within the ocean. Because suspended particulate material is intimately involved in marine food webs and transition metals, such as copper, can have toxic effects, it is important to develop a sound methodology for characterizing and quantifying transition metal behavior associated with the solid material. The characterization of solid-phase-associated transition metals in the marine environment has largely been directed at marine sediments. These studies have generally indicated that it is not possible to uniquely identify the solid phases or chemical speciation of a given metal. There are many reasons for this difficulty, but the probable major analytical problems arise from the fact that many of the transition metals of interest are present only in trace concentrations as adsorbed species on amorphous oxides or as coprecipitates. In one approach transition metals are classified according to how easily they are solubilized when exposed to different types of chemical attack, as defined in chemical extraction schemes. In this study, several of the most widely accepted extraction techniques were compared for many of the most commonly measured transition metals to a variety of marine sediments. Based on the results of this study, the sequential extraction scheme of Tessler et al. (1979) is the recommended method for the characterization of solid-phase associated transition metals. An increase of the reducing agent concentration in the intermediate step and temperature decrease with an additional HCl digestion in the residual step are recommended as improvements, based on the results of the individual extraction method studies.

Van Valin, R.; Morse, J.W.

1981-02-01T23:59:59.000Z

262

Polymer-supported sulfonated catechol and linear catechol amide ligands and their use in selective metal ion removal and recovery from aqueous solutions  

DOE Patents [OSTI]

The present invention concerns the synthesis of several biomimetically important polymer-supported, sulfonated catechol (PS-CATS), sulfonated bis-catechol linear amide (PS-2-6-LICAMS) and sulfonated 3,3-linear tris-catechol amide (PS-3,3-LICAMS) ligands, which chemically bond to modified 6% crosslinked macroporous polystyrene-divinylbenzene beads (PS-DVB). These polymers are useful for the for selective removal and recovery of environmentally and economically important metal ions from aqueous solution, as a function of pH. The Fe.sup.3+ ion selectivity shown for PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads in competition with a similar concentration of Cu.sup.2+, Zn.sup.2+, Mn.sup.2+, Ni.sup.2+,Mg.sup.2+, Al.sup.3+, and Cr.sup.3+ ions at pH 1-3. Further, the metal ion selectivity is changed at higher pH values in the absence of Fe.sup.3+ (for example, Hg.sup.2+ at pH 3). The rates of selective removal and recovery of the trivalent metal ions, e.g. Fe.sup.3+ Al.sup.3+ ion etc. with the PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads use determined are useful as well as equilibrium selectivity coefficient (K.sub.m) values for all metal competition studies. The chelate effect for the predisposed octahedral PS-3,3-LICAMS polymer pendant ligand is the reason that this ligand has a more pronounced selectivity for Fe.sup.3+ ion in comparison to the PS-CATS polymer beads. The predisposed square planar PS-2-6-Mn.sup.2+, Ni.sup.2+, and Mg.sup.2+, than either PS-CATS or PS-3,3-LICAMS. However, Fe.sup.3+ ion still dominates in competition with other divalent and trivalent metal ions. In the absence of Fe.sup.3+, the polymer ligand is selective for Al.sup.3+, Cu.sup.2+ or Hg.sup.2+. The changing of the cavity size from two CH.sub.2 groups to six CH.sub.2 groups in the PS-2-6-LICAMS polymer pendant ligand series does not effect the order of metal ion selectivity.

Fish, Richard H. (Berkeley, CA)

1997-01-01T23:59:59.000Z

263

Polymer-supported sulfonated catechol and linear catechol amide ligands and their use in selective metal ion removal and recovery from aqueous solutions  

DOE Patents [OSTI]

The present invention concerns the synthesis of several biomimetically important polymer-supported, sulfonated catechol (PS-CATS), sulfonated bis-catechol linear amide (PS-2-6-LICAMS) and sulfonated 3,3-linear tris-catechol amide (PS-3,3-LICAMS) ligands, which chemically bond to modified 6% crosslinked macroporous polystyrene-divinylbenzene beads (PS-DVB). These polymers are useful for the for selective removal and recovery of environmentally and economically important metal ions from aqueous solution, as a function of pH. The Fe{sup 3+} ion selectivity shown for PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads in competition with a similar concentration of Cu{sup 2+}, Zn{sup 2+}, Mn{sup 2+}, Ni{sup 2+}, Mg{sup 2+}, Al{sup 3+}, and Cr{sup 3+} ions at pH 1--3. Further, the metal ion selectivity is changed at higher pH values in the absence of Fe{sup 3+} (for example, Hg{sup 2+} at pH 3). The rates of selective removal and recovery of the trivalent metal ions, e.g. Fe{sup 3+}, Al{sup 3+} ion etc. with the PS-CATS, PS-2-6-LICAMS, and PS-3,3-LICAMS polymer beads use determined are useful as well as equilibrium selectivity coefficient (K{sub m}) values for all metal competition studies. The chelate effect for the predisposed octahedral PS-3,3-LICAMS polymer pendant ligand is the reason that this ligand has a more pronounced selectivity for Fe{sup 3+} ion in comparison to the PS-CATS polymer beads. The predisposed square planar PS-2-6-Mn{sup 2+}, Ni{sup 2+}, and Mg{sup 2+}, than either PS-CATS or PS-3,3-LICAMS. However, Fe{sup 3+} ion still dominates in competition with other divalent and trivalent metal ions. In the absence of Fe{sup 3+}, the polymer ligand is selective for Al{sup 3+}, Cu{sup 2+} or Hg{sup 2+}. The changing of the cavity size from two CH{sub 2} groups to six CH{sub 2} groups in the PS-2-6-LICAMS polymer pendant ligand series does not effect the order of metal ion selectivity. 9 figs.

Fish, R.H.

1997-04-22T23:59:59.000Z

264

Stabilization and reuse of heavy metal contaminated soils by means of quicklime sulfate salt treatment. Final report, September 1992--February 1995  

SciTech Connect (OSTI)

Capillary and hydraulic flows of water in porous media contaminated by heavy metal species often result in severe aquifer contamination. In the present study a chemical admixture stabilization approach is proposed, where heavy metal stabilization/immobilization is achieved by means of quicklime-based treatment. Both in-situ treatment by injection and on-site stabilization by excavation, mixing, and compaction will be investigated. In addition, the potential to reuse the resulting stabilized material as readily available construction material will also be investigated. The heavy metals under study include: arsenic, chromium, lead, and mercury. The proposed technical approach consists of three separate phases. During phase A, both artificial and naturally occurring contaminated soil mixes were treated, and then tested for stress-strain properties, leachability, micromorphology, mineralogical composition, permeability, setting time, and durability. In such a way, the effectiveness of the proposed remediation technology was verified, the treatment approach was optimized, and the underlying mechanisms responsible for stabilization were established. During phase B, the proposed technology will be tested for two DOE-site subscale systems, involving naturally occurring contaminated soil, using the same testing methodology as the one outlined for phase A. Provided that the proposed technology is proven effective for the subscale systems, a field application will be demonstrated. Again process quality monitoring will be performed by testing undisturbed samples collected from the treated sites, in the same fashion as for the previous phases. Following completion of the proposed study, a set of comprehensive guidelines for field applications will be developed. 42 refs., 196 figs., 26 tabs.

Dermatas, D.

1995-08-01T23:59:59.000Z

265

Selected heavy metals in tissues of bottlenose dolphins (Tursiops truncatus) stranded along thr Texas and Florida Gulf coasts  

E-Print Network [OSTI]

of bottlenose dolphins in other geographic regions. Two metal-metal correlations were examined in liver, kidney and muscle tissue. Strong positive correlations were found between mercury and selenium in the three tissues. No correlations existed between cadmium...

Haubold, Elsa Maria

2012-06-07T23:59:59.000Z

266

Continuous sulfur removal process  

DOE Patents [OSTI]

A continuous process for the removal of hydrogen sulfide from a gas stream using a membrane comprising a metal oxide deposited on a porous support is disclosed. 4 figures.

Jalan, V.; Ryu, J.

1994-04-26T23:59:59.000Z

267

Heavy metal contaminants and processing effects on the composition, storage stability and fatty acid profiles of five common commercially available fish species in Oron Local Government, Nigeria  

Science Journals Connector (OSTI)

Five commercially available common fish species: catfish (Chsysichthyes nigrodigitatus), tilapia (Oreochromis nilotichus), ilisha (Ilisha africana), bonga (Ethmalosa fimbriata) and mudskipper (Periophthalmus koelreuteri) in Oron Local Government Area were evaluated for their content of heavy metals and the effects of salting on nutrient contents, oxidative stability and fatty acid profiles of smoke-dried fish cakes. Concentrations of heavy metals in edible muscle, liver and gill tissues were determined while the oxidative rancidities in unsalted and salted smoke-dried fish cakes, packed in low-density polyethylene (LDPE) bags and stored at 301C were assessed using peroxide value (POV), thiobarbituric acid (TBA) value, free fatty acid (FFA) contents and sensory evaluation techniques. Generally the analytical data for Cu, Zn and Pb in the muscle, gills and liver of test samples were significantly low. Similarly, insignificant concentrations (O. nilotichus>E. fimbriata> I. africana>P. keolreuteri. Palmitic acid (C16:0) was the predominant saturated fatty acid in the test samples. The eicosapentaenoic acid (EPA) contents of unsalted smoke-dried C. nigrodigitatus was 4.9%, Oreochromis niloticus 6.5%, Ilisha africana 2.6%, E. fimbriata 5.6% and P. koelreuteri 7.64%. The docosahexaenoic acid (DHA) contents of salted smoked dried fish were 1.8% (C. nigrodigitatus), 4.8% (O. niloticus), 9.5% (I. africana), 5.5% (E. fimbriata) and 12.3% (P. koelreuteri).

Lucy Eboh; Horsfall D. Mepba; Mayo B. Ekpo

2006-01-01T23:59:59.000Z

268

Removal of As, Cd, Cu, Ni, Pb, and Zn from a highly contaminated industrial soil using surfactant enhanced soil washing  

Science Journals Connector (OSTI)

Surfactant enhanced soil washing (SESW) was applied to an industrial contaminated soil. A preliminary characterization of the soil regarding the alkaline-earth metals, Na, K, Ca and Mg took values of 2866, 2036, 2783 and 4149mg/kg. The heavy metals As, Cd, Cu, Pb, Ni and Zn, had values of 4019, 14, 35582, 70, 2603, and 261mg/kg, respectively. When using different surfactants, high removal of Cu, Ni and Zn were found, and medium removals for Pb, As and Cd. In the case of these three metals, tap water removed more than the surfactant solutions, except for the case of As. There were surfactants with average removals (this is, the removal for all the metals studied) of 67.1% (Tween 80), 64.9% (Surfacpol 14104) and 61.2% (Emulgin W600). There were exceptional removals using Texapon N-40 (83.2%, 82.8% and 86.6% for Cu, Ni and Zn), Tween 80 (85.9, 85.4 and 81.5 for Cd, Zn and Cu), Polafix CAPB (79%, 83.2% and 49.7% for Ni, Zn and As). The worst results were obtained with POLAFIX LO with a global removal of 45%, well below of the average removal with tap water (50.2%).All removal efficiencies are reported for a one step washing using 0.5% surfactant solutions, except for the case of mezquite gum, where a 0.1% solution was employed.

Luis G. Torres; Rosario B. Lopez; Margarita Beltran

2012-01-01T23:59:59.000Z

269

An assessment of metal contamination in mangrove sediments and leaves from Punta Mala Bay, Pacific Panama  

E-Print Network [OSTI]

Elsevier Ltd. All rights reserved. Keywords: Coastal pollution; Sediment; Heavy metals; Mangrove; Laguncularia racemosa; Panama 1. Introduction Elevated concentrations of heavy metals have been re- corded allows metal mobilisation and bioavailability (Clark et al., 1998). Concentrations of heavy metals

Bermingham, Eldredge

270

Magnetic properties as proxies for the evaluation of heavy metal contamination in urban street dusts of Nanjing, Southeast China  

Science Journals Connector (OSTI)

......toxicity, degradation-resistant characteristics and their high ecological transference potential (Shi et-al. 2011). Street dust...Maher B.A , Moore C., Matzka J. Spatial variation in vehicle derived metal pollution identified by magnetic and elemental......

Huiming Li; Xin Qian; Haitao Wei; Ruibin Zhang; Yang Yang; Zhe Liu; Wei Hu; Hailong Gao; Yulei Wang

2014-01-01T23:59:59.000Z

271

Artificial Neural Network Processing of Stripping Analysis Responses for Identifying and Quantifying Heavy Metals in the Presence of Intermetallic Compound Formation  

Science Journals Connector (OSTI)

Artificial Neural Network Processing of Stripping Analysis Responses for Identifying and Quantifying Heavy Metals in the Presence of Intermetallic Compound Formation ... Using simulated data, modeled after complex interactions experimentally observed in samples containing Cu and Zn, it has been demonstrated that networks containing two layers of neurons (a nonlinear hidden layer and a linear output layer) can be trained to calculate concentrations under a variety of complicated situations. ... The output of any particular neuron in a feed-forward neural network is determined by passing the sum of the weighted inputs through a transfer function, where the transfer function can have any of a variety of forms (linear and sigmoidal transfer functions are most common). ...

Helen Chan; Alexander Butler; David M. Falck; Michael S. Freund

1997-07-01T23:59:59.000Z

272

Identification and validation of heavy metal and radionuclide hyperaccumulating terrestrial plant species. Quarterly technical progress report, March 20, 1997--June 19, 1997  

SciTech Connect (OSTI)

This laboratory has been involved in a collaborative project focusing on a range of issues related to the phytoremediation of heavy metal-and radionuclide- contaminated soils. While much of the research has been fundamental in nature, involving physiological and molecular characterizations of the mechanisms of hyperaccumulation in plants, the laboratory is also investigating more practical issues related to phytoremediation. A central issue in this latter research has been the identification of amendments capable of increasing the bioavailability and subsequent phytoextraction of radionuclides. The results described here detail these efforts for uranium and Cs-137. A study was also conducted on a Cs-137 contaminated site at Brookhaven National Laboratory (BNL), which allowed application of the laboratory and greenhouse results to a field setting.

Kochian, L.

1997-11-01T23:59:59.000Z

273

A γ-Glutamyl Cyclotransferase Protects Arabidopsis Plants from Heavy Metal Toxicity by Recycling Glutamate to Maintain Glutathione Homeostasis  

Science Journals Connector (OSTI)

...4. Following dialysis, total protein...without any metal treatments. Briefly, plant...linear gradient of water/0.05% phosphoric...LC-MS/MS (Waters Micromass triple...100% acidified water to 100% acidified...through positive electrospray ionization...For comparing treatments and control...

Bibin Paulose; Sudesh Chhikara; Joshua Coomey; Ha-il Jung; Olena Vatamaniuk; Om Parkash Dhankher

2013-11-08T23:59:59.000Z

274

Magnetic properties as indicators of heavy metals pollution in urban topsoils: a case study from the city of Luoyang, China  

Science Journals Connector (OSTI)

......the engine. The corrosion causes metal wear in the automobile engine and release of...dispersant improving agents for motor oil. Tire wear was also found to contribute a significant...between the ARM and PLI for the stream and marine sediments (Chan et al. 2001; Chaparro......

S. G. Lu; S. Q. Bai; Q. F. Xue

2007-11-01T23:59:59.000Z

275

Effects of heavy metals in sediments on the macroinvertebrate community in the Short Creek/Empire Lake aquatic system, Cherokee County, Kansas: A recommendation for site-specific criteria. Technical report (Final)  

SciTech Connect (OSTI)

This study uses statistical analysis techniques to determine the effects of four heavy metals (cadmium, lead, manganese, and zinc) on the macroinvertebrate community using the data collected in the fall 1987. The concentrations of all four metals were found to be greatly elevated throughout Empire Lake and in both the Spring River and Shoal Creek arms of the reservoir. It is concluded that density and species richness were greatly reduced. The report also includes recommendations for the upper bounds for the sediment criteria of the four metals.

Jobe, J.

1988-10-01T23:59:59.000Z

276

The distribution of potentially toxic heavy metals in the sediments of San Antonio Bay and the northwest Gulf of Mexico  

E-Print Network [OSTI]

Gulf of Mexico are those of Tieh and Pyle (1972) and Holmes (1974). Included in the Tieh and Pyle (1972) study were iron, manganese, nickel, and zinc analyses 12 and a conclusion that, excluding manganese and zinc, there is littl. e difference... yielded 61% Fe, 89% Mn, and 65% Cz wi. th 12 N HC1 (Fukai, 1965). Jones (1973) found that approximately 75% of the zinc& 60% of the cadmium, and most all the lead and copper were removed by a rigorous nitric acid and subsequent HNO -HC1 treat- 3 ment...

Trefry, John Harold

1974-01-01T23:59:59.000Z

277

Heavy metals in eggshells of cattle egret (Bubulcus ibis) and little egret (Egretta garzetta) from the Punjab province, Pakistan  

Science Journals Connector (OSTI)

Concentrations of nine trace metals were determined to assess site-specific and species-specific differences using Fast Sequential Atomic Absorption Spectrophotometer (Varian FAAS-240) in eggshells of Bubulcus ibis and Egretta garzetta from seven heronries in the Punjab province, Pakistan. Pattern of metal concentration followed the order: Fe>Zn>Pb>Mn>Cd>Cr>Li>Cu>Ni. Greater mean concentrations of Mn(1.17?g/g), Ni(0.11?g/g), Pb(1.49?g/g), Cd(0.88?g/g), Cr(0.7?g/g), Cu(0.20?g/g) and Li(0.27?g/g) were recorded in little egret. Mean concentrations of Mn, Pb, and Cr, (3.98, 5.4, 0.8?g/g) were significantly higher in eggshells collected from Shorkot; Cu, Zn and Ni (0.19, 13.0, 0.12?g/g) from the Trimu Headwork; Cd (1.23?g/g) from Jhang Faisalabad Road and Fe (67.98?g/g) from Mailsi. Multivariate analyses indicated that Mn, Pb, Cd, Ni, Cu, Cr and Zn were associated with anthropogenic activities and Fe and Li with natural origin. This study provides the baseline data for a monitoring program and revealed that egg-shells can serve as a bio-monitor of local metal contamination.

Muhammad Zaffar Hashmi; Riffat Naseem Malik; Muhammad Shahbaz

2013-01-01T23:59:59.000Z

278

Removal of copper and lead ions from aqueous solutions by adsorbent derived from sewage sludge  

Science Journals Connector (OSTI)

Adsorbent prepared from sewage sludge has been used for the adsorption of Cu2+ and Pb2+ from aqueous solutions. It was noted that an increase in removal efficiency achieved 72% and 56% when agitation time achieved 120 min, and a decrease in the removal efficiency from 81% and 70% to 36% and 40% when the heavy metals initial concentration from 10 mg L?1 to 80 mg L?1 for Cu2+ and Pb2+ concentration, the removal efficiency increased with the adsorbent concentration increased. The Langmuir model fitted the experimental data reasonably well. The adsorption capacities achieved 9.737 mg g?1 and 7.386 mg g?1 for the Cu2+ and Pb2+, respectively. Desorption studies were performed by using dilute hydrochloric acid. Quantitative recovery of the metal ion is possible. The mechanism of adsorption seems to be ion exchange.

YunBo Zhai; GuangMing Zeng; LaFang Wang; XianXun Wei; CaiTing Li; ShanHong Li

2011-01-01T23:59:59.000Z

279

Availability and distribution of heavy metals, nitrogen, and phosphorus from sewage sludge in the plant-soil-water continuum  

SciTech Connect (OSTI)

Research was conducted during 1984 and 1985 to determine Cd, Cu, N, Ni, P, and Zn availabilities to barley (Hordeum vulgare) and corn (Zea mays) grown on four sludge-amended soils. An aerobically digested sewage sludge, which was dewatered for approximately 2 years on sandbeds, was obtained from a sewage-treatment plant with major industrial inputs. A 14-day anaerobic N incubation study indicated that mineralization of sludge organic N varied from 9.2% at the 42 Mg ha(-1) sludge rate to 4.2% at the 210 Mg ha(-1) rate. This relatively low percentage of N mineralized from the sludge may reflect the inhibitory effects of the high sludge-metal levels on N transformations and the changes in sludge composition during long-term dewatering on sandbeds. Sludge application increased crop yields, except where the amounts of N mineralized from the sludge was inadequate to supply the N requirement of the crop. Crop yields were not decreased by either metal phytotoxity or P deficiency on the four sludge-amended soils.

Rappaport, B.D.; Scott, J.D.; Martens, D.C.; Reneau, R.B.; Simpson, T.W.

1987-01-01T23:59:59.000Z

280

Bioavailability of Cadmium and Zin to Two Earthworm Species in High-metal Soils  

E-Print Network [OSTI]

S.P. 1998. Toxicity of heavy metals to microorganism andtoxicity (Kizilkaya, Earthworms influence on heavy metalsof heavy metals in soil, is crucial to predict metals toxic

Liu, Ying

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Measurement of the Spin-Orbit Perturbation in the P-State Continuum of Heavy Alkali-Metal Atoms: K, Rb, and Cs  

Science Journals Connector (OSTI)

The spin-orbit interaction for the P-state continuum of heavy alkali metals was investigated in a photoionization experiment using spin-polarized alkali atoms and circularly polarized light. From the asymmetry in ion-counting rates corresponding to the two photon helicities, Fano's spin-orbit perturbation parameter x was determined over a range of several hundred angstroms for K, Rb, and Cs. The spin-orbit perturbation was found to increase from K to Rb to Cs as expected, and the nonlinear behavior of x as a function of the photon energy E was demonstrated for K. Knowledge of x(E) was used to establish accurate values for the position of the Cooper minimum and to estimate the magnitude of the cross section at the minimum. In addition, the x(E) data for Cs were used to gain information about the spin polarization of photoelectrons in a Fano-type polarized electron source. Finally, extrapolation of x(E) for cesium into the discrete spectrum indicated the existence of a pole in the function ?(E) which corresponds to the doublet line-strength ratio ?(EnP)=S(nP32)S(nP12) at the discrete energies EnP. According to our extrapolation, the pole lies in the region of n=10to15, in agreement with the early spectroscopic work of Sambursky (1928) and Beutell (1939), whose measurements were discounted by later investigators.

G. Baum; M. S. Lubell; W. Raith

1972-03-01T23:59:59.000Z

282

An Estimate of the Order of Magnitude of the Explosion During a Core Meltdown-Compaction Accident for Heavy Liquid Metal Fast Reactors: A disquieting result updating the Bethe-Tait model  

E-Print Network [OSTI]

but lasting over a timescale of milliseconds. The forms of the energy release and of the resulting struc- tural damage differ significantly between a high explosive detonation and a propellant conflagration. Considering the yield of TNT Containment Law... gravitational compaction of the 100 MWth core, the ves- sel could withstand the 60 kg TNT-equivalent explosion from a 100 $/s reactivity insertion if a bare core is as- sumed; however, allowing for the presence of the unboiled heavy liquid metal coolant...

Arias, Francisco J.; Parks, Geoffrey T.

2014-12-09T23:59:59.000Z

283

Metal impacts on microbial biomass in the anoxic sediments of a contaminated lake  

E-Print Network [OSTI]

and J. I. Drever (1997), Toxicity of heavy metals (Ni,Zn) to2001), Acute toxicity of heavy metals to acetate-utilizing

Gough, Heidi L.

2011-01-01T23:59:59.000Z

284

Metal-binding polymesr as chelating agents  

E-Print Network [OSTI]

Abstract Metal chelating polymers are functional polymers that bear specified chemical groups capable of selectively binding metals. Heavy metal contamination is considered a serious problem because these metals, even at ...

Mohammadi, Zahra

2011-04-11T23:59:59.000Z

285

Drum lid removal tool  

DOE Patents [OSTI]

A tool for removing the lid of a metal drum wherein the lid is clamped over the drum rim without protruding edges, the tool having an elongated handle with a blade carried by an angularly positioned holder affixed to the midsection of the handle, the blade being of selected width to slice between lid lip and the drum rim and, when the blade is so positioned, upward motion of the blade handle will cause the blade to pry the lip from the rim and allow the lid to be removed.

Pella, Bernard M. (Martinez, GA); Smith, Philip D. (North Augusta, SC)

2010-08-24T23:59:59.000Z

286

Radionuclides, Heavy Metals, and Polychlorinated Biphenyls in Soils Collected Around the Perimeter of Low-Level Radioactive Waste Disposal Area G during 2006  

SciTech Connect (OSTI)

Twenty-one soil surface samples were collected in March around the perimeter of Area G, the primary disposal facility for low-level radioactive solid waste at Los Alamos National Laboratory (LANL). Three more samples were collected in October around the northwest corner after elevated tritium levels were detected on an AIRNET station located north of pit 38 in May. Also, four soil samples were collected along a transect at various distances (48, 154, 244, and 282 m) from Area G, starting from the northeast corner and extending to the Pueblo de San Ildefonso fence line in a northeasterly direction (this is the main wind direction). Most samples were analyzed for radionuclides ({sup 3}H, {sup 238}Pu, {sup 239,240}Pu, {sup 241}Am, {sup 234}U, {sup 235}U, and {sup 238}U), inorganic elements (Al, Ba, Be, Ca, Cr, Co, Cu, Fe, Mg, Mn, Ni, K, Na, V, Hg, Zn, Sb, As, Cd, Pb, Se, Ag, and Tl) and polychlorinated biphenyl (PCB) concentrations. As in previous years, the highest levels of {sup 3}H in soils (690 pCi/mL) were detected along the south portion of Area G near the {sup 3}H shafts; whereas, the highest concentrations of {sup 241}Am (1.2 pCi/g dry) and the Pu isotopes (1.9 pCi/g dry for {sup 238}Pu and 5 pCi/g dry for {sup 239,240}Pu) were detected along the northeastern portions near the transuranic waste pads. Concentrations of {sup 3}H in three soil samples and {sup 241}Am and Pu isotopes in one soil sample collected around the northwest corner in October increased over concentrations found in soils collected at the same locations earlier in the year. Almost all of the heavy metals, with the exception of Zn and Sb in one sample each, in soils around the perimeter of Area G were below regional statistical reference levels (mean plus three standard deviations) (RSRLs). Similarly, only one soil sample collected on the west side contained PCB concentrations--67 {micro}g/kg dry of aroclor-1254 and 94 {micro}g/kg dry of aroclor-1260. Radionuclide and inorganic element concentrations in soils collected along a transect from Area G to the Pueblo de San Ildefonso fence line show that most contained concentrations of {sup 241}Am, {sup 238}Pu, and {sup 239,240}Pu above the RSRLs. Overall, all concentrations of radionuclides, heavy metals, and PCBs that were detected above background levels in soils collected around the perimeter of Area G and towards the Pueblo de San Ildefonso boundary were still very low and far below LANL screening levels and regulatory standards.

P. R. Fresquez

2007-02-28T23:59:59.000Z

287

Using Magnetically Responsive Tea Waste to Remove Lead in Waters under Environmentally Relevant  

E-Print Network [OSTI]

and aircrafts. Most heavy metals are toxic to humans. Specifically, lead (Pb) is a major cause of neurological-mail: reginaldthio@sutd.edu.sg Introduction As industrialization continues worldwide, heavy metal contam- ination of the environment is becoming an increasing concern for its adverse health effects on human society. Heavy metals

Doyle, Patrick S.

288

Accumulation of Pb and Cu heavy metals in sea water, sediment, and leaf and root tissue of Enhalus sp. in the seagrass bed of Banten Bay  

SciTech Connect (OSTI)

Banten Bay in Indonesia is a coastal area which has been highly affected by human activity. Previous studies have reported the presence of lead (Pb) and copper (Cu) heavy metals in the seawater of this area. This study was conducted to measure the accumulation of Pb and Cu in seawater, sediment, leaf tissue, and root tissue of the seagrass species Enhalus sp. Sampling was conducted at two observation stations in Banten Bay: Station 1 (St.1) was located closer to the coastline and to industrial plants as source of pollution, while Station 2 (St.2) was located farther away offshore. At each station, three sampling points were established by random sampling. Field sampling was conducted at two different dates, i.e., on 29 May 2012 and 30 June 2012. Samples were processed by wet ashing using concentrated HNO{sub 3} acid and measured using Atomic Absorption Spectrometry (AAS). Accumulation of Pb was only detected in sediment samples in St.1, while Cu was detected in all samples. Average concentrations of Cu in May were as follows: sediment St.1 = 0.731 ppm, sediment St.2 = 0.383 ppm, seawater St.1 = 0.163 ppm, seawater St.2 = 0.174 ppm, leaf St.1 = 0.102 ppm, leaf St.2 = 0.132 ppm, root St.1= 0.139 ppm, and root St.2 = 0.075 ppm. Average measurements of Cu in June were: sediment St.1 = 0.260 ppm, leaf St.1 = 0.335 ppm, leaf St.2 = 0.301 ppm, root St.1= 0.047 ppm, and root St.2 = 0.060 ppm. In June, Cu was undetected in St.2 sediment and seawater at both stations. In May, Cu concentration in seawater exceeded the maximum allowable threshold for water as determined by the Ministry of the Environment. Spatial and temporal variation in Pb and Cu accumulation were most probably affected by distance from source and physical conditions of the environment (e.g., water current and mixing)

Fauziah, Faiza, E-mail: faiza.fauziah@gmail.com; Choesin, Devi N., E-mail: faiza.fauziah@gmail.com [School of Life Sciences and Technology, Institut Teknologi Bandung, Jalan Ganeca 10, Bandung 40132 (Indonesia)

2014-03-24T23:59:59.000Z

289

Coupling and Testing the Fate and Transport of Heavy Metals and Other Ionic Species in a Groundwater Setting at Oak Ridge, TN - 13498  

SciTech Connect (OSTI)

Historical data show that heavy metals (including mercury) were released from Y -12 National Security Complex (NSC) at Oak Ridge, Tennessee, to the surrounding environments during its operation in 1950's. Studies have also shown that metals accumulated in the soil, rock, and groundwater, and are, at the present time, sources of contamination to nearby rivers and creeks (e.g., East Fork Poplar Creek, Bear Creek). For instance, mercury (Hg), zinc (Zn), cadmium (Cd) and lead (Pb) have been found and reported on the site groundwater. The groundwater type at the site is Ca-Mg-HCO{sub 3}. This paper presents a modeling application of PHREEQC, a model that simulates geochemical processes and couples them to flow and transport settings. The objective was to assess the capability of PHREEQC to simulate the transport of ionic species in groundwater at Oak Ridge, Tennessee; data were available from core holes and monitoring wells over a 736-m distance, within 60-300 m depths. First, predictions of the transport of major ionic species (i.e., Ca{sup 2+} and Mg{sup 2+}) in the water were made between monitoring wells and for GW-131. Second, the model was used to assess hypotheses under two scenarios of transport for Zn, Cd, Pb and Hg, in Ca-Mg-HCO{sub 3} water, as influenced by the following solid-liquid interactions: a) the role of ion exchange and b) the role of both ion exchange and sorption, the latter via surface complexation with Fe(OH){sub 3}. The transport scenario with ion exchange suggests that significant ion exchange is expected to occur for Zn, Cd and Pb concentrations, with no significant impact on Hg, within the first 100 m. Predictions match the expected values of the exchange coefficients relative to Ca{sup 2+} and Mg{sup 2+} (e.g., K{sub Ca/Zn} = K{sub Ca/Cd} > K{sub Ca/Pb} > K{sub Ca/Hg}). The scenario with both ion exchange and sorption does affect the concentrations of Zn and Cd to a small extent within the first 100 m, but does more meaningfully reduce the concentration of Pb, within the same distance, and also decreases the concentration of Hg in between core holes. Analysis of the above results, in the light of available literature on the ions of this study, does fundamentally support the capability of PHREEQC to predict the transport of major ions in a groundwater setting; it also generally supports the hypothesized role of ion exchange and sorption. The results indicate the potential of the model as a tool in the screening, selection and monitoring of remediation technologies for contaminated groundwater sites. (authors)

Noosai, Nantaporn; Fuentes, Hector R. [CEE Florida International University, Miami, FL 33174 (United States)] [CEE Florida International University, Miami, FL 33174 (United States)

2013-07-01T23:59:59.000Z

290

Economic feasibility of biochemical processes for the upgrading of crudes and the removal of sulfur, nitrogen, and trace metals from crude oil -- Benchmark cost establishment of biochemical processes on the basis of conventional downstream technologies. Final report FY95  

SciTech Connect (OSTI)

During the past several years, a considerable amount of work has been carried out showing that microbially enhanced oil recovery (MEOR) is promising and the resulting biotechnology may be deliverable. At Brookhaven National Laboratory (BNL), systematic studies have been conducted which dealt with the effects of thermophilic and thermoadapted bacteria on the chemical and physical properties of selected types of crude oils at elevated temperatures and pressures. Current studies indicate that during the biotreatment several chemical and physical properties of crude oils are affected. The oils are (1) emulsified; (2) acidified; (3) there is a qualitative and quantitative change in light and heavy fractions of the crudes; (4) there are chemical changes in fractions containing sulfur compounds; (5) there is an apparent reduction in the concentration of trace metals; and (6) the qualitative and quantitative changes appear to be microbial species dependent; and (7) there is a distinction between biodegraded and biotreated oils. The downstream biotechnological crude oil processing research performed thus far is of laboratory scale and has focused on demonstrating the technical feasibility of downstream processing with different types of biocatalysts under a variety of processing conditions. Quantitative economic analysis is the topic of the present project which investigates the economic feasibility of the various biochemical downstream processes which hold promise in upgrading of heavy crudes, such as those found in California, e.g., Monterey-type, Midway Sunset, Honda crudes, and others.

Premuzic, E.T.

1996-08-01T23:59:59.000Z

291

Use of Heavy Oil Fly Ash as a Color Ingredient in Cement Mortar  

Science Journals Connector (OSTI)

Heavy oil fly ash (HOFA) is a byproduct generated by the burning of heavy fuel oil. Chemical analysis showed that HOFA is mainly composed of unburned carbon with a significant amount of heavy metals. Due to to...

Abdullah Mofarrah; Tahir Husain

2013-06-01T23:59:59.000Z

292

Investigation of mixed metal sorbent/catalysts for the simultaneous removal of sulfur and nitrogen oxides. Semiannual report, Apr 1, 1998--Oct 31, 1998  

SciTech Connect (OSTI)

Simultaneous removal of SO{sub 2} and NO{sub x} using a regenerable solid sorbent will constitute an important improvement over the use of separate processes for the removal of these two pollutants from stack gases and possibly eliminate several shortcomings of the individual SO{sub 2} and NO{sub x} removal operations. The work done at PETC and the DOE-funded investigation of the investigators on the sulfation and regeneration of alumina-supported cerium oxide sorbents have shown that they can perform well at relatively high temperatures (823--900 K) as regenerable desulfurization sorbents. Survey of the recent literature shows that addition of copper oxide to ceria lowers the sulfation temperature of ceria down to 773 K, sulfated ceria-based sorbents can function as selective SCR catalysts even at elevated temperatures, SO{sub 2} can be directly reduced to sulfur by CO on CuO-ceria catalysts, and ceria-based catalysts may have a potential for selective catalytic reduction of NO{sub x} by methane. These observations indicate a possibility of developing a ceria-based sorbent/catalyst which can remove both SO{sub 2} and NO{sub x} from flue gases within a relatively wide temperature window, produce significant amounts of elemental sulfur during regeneration, and use methane for the selective catalytic reduction of NO{sub x}. The objective of this research is to conduct kinetic and parametric studies of the selective catalytic reduction of NO{sub x} with NH{sub 3} and CH{sub 4} over alumina-supported cerium oxide and copper oxide-cerium oxide sorbent/catalysts; investigate SO{sub 2} removal at lower temperatures by supported copper oxide-cerium oxide sorbents; and investigate the possibility of elemental sulfur production during regeneration with CO or with CH{sub 4} air mixtures. The sorbents consisting of cerium oxide and copper oxide impregnated on alumina have been prepared and characterized. Their sulfation performance has been investigated in a TGA setup, studying mainly the effects of temperature and sorbent composition. The results of the sulfation experiments have been evaluated and presented in this report. A study to model the sulfation selectivity of the two constituents of the sorbents is also underway.

Dr. Ates Akyurtlu; Dr. Jale F. Akyurtlu

1998-10-31T23:59:59.000Z

293

Multiple pollutant removal using the condensing heat exchanger. Task 2, Pilot scale IFGT testing  

SciTech Connect (OSTI)

The purpose of Task 2 (IFGT Pilot-Scale Tests at the B&W Alliance Research Center) is to evaluate the emission reduction performance of the Integrated flue Gas Treatment (IFGT) process for coal-fired applications. The IFGT system is a two-stage condensing heat exchanger that captures multiple pollutants - while recovering waste heat. The IFGT technology offers the potential of a addressing the emission of SO{sub 2} and particulate from electric utilities currently regulated under the Phase I and Phase II requirements defined in Title IV, and many of the air pollutants that will soon be regulated under Title III of the Clean Air Act. The performance data will be obtained at pilot-scale conditions similar to full-scale operating systems. The task 2 IFGT tests have been designed to investigate several aspects of IFGT process conditions at a broader range of variable than would be feasible at a larger scale facility. The performance parameters that will be investigated are as follows: SO{sub 2} removal; particulate removal; removal of mercury and other heavy metals; NO{sub x} removal; HF and HCl removal; NH{sub 3} removal; ammonia-sulfur compounds generation; and steam injection for particle removal. For all of the pollutant removal tests, removal efficiency will be based on measurements at the inlet and outlet of the IFGT facility. Heat recovery measurements will also be made during these tests to demonstrate the heat recovery provided by the IFGT technology. This report provides the Final Test Plan for the first coal tested in the Task 2 pilot-scale IFGT tests.

Jankura, B.J.

1996-01-01T23:59:59.000Z

294

Laser removal of sludge from steam generators  

DOE Patents [OSTI]

A method of removing unwanted chemical deposits known as sludge from the metal surfaces of steam generators with laser energy is provided. Laser energy of a certain power density, of a critical wavelength and frequency, is intermittently focused on the sludge deposits to vaporize them so that the surfaces are cleaned without affecting the metal surface (sludge substrate). Fiberoptic tubes are utilized for laser beam transmission and beam direction. Fiberoptics are also utilized to monitor laser operation and sludge removal.

Nachbar, Henry D. (Ballston Lake, NY)

1990-01-01T23:59:59.000Z

295

Silica Scaling Removal Process  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Silica Scaling Removal Process Silica Scaling Removal Process Scientists at Los Alamos National Laboratory have developed a novel technology to remove both dissolved and colloidal...

296

SOVENT BASED ENHANCED OIL RECOVERY FOR IN-SITU UPGRADING OF HEAVY OIL SANDS  

SciTech Connect (OSTI)

With the depletion of conventional crude oil reserves in the world, heavy oil and bitumen resources have great potential to meet the future demand for petroleum products. However, oil recovery from heavy oil and bitumen reservoirs is much more difficult than that from conventional oil reservoirs. This is mainly because heavy oil or bitumen is partially or completely immobile under reservoir conditions due to its extremely high viscosity, which creates special production challenges. In order to overcome these challenges significant efforts were devoted by Applied Research Center (ARC) at Florida International University and The Center for Energy Economics (CEE) at the University of Texas. A simplified model was developed to assess the density of the upgraded crude depending on the ratio of solvent mass to crude oil mass, temperature, pressure and the properties of the crude oil. The simplified model incorporated the interaction dynamics into a homogeneous, porous heavy oil reservoir to simulate the dispersion and concentration of injected CO2. The model also incorporated the characteristic of a highly varying CO2 density near the critical point. Since the major challenge in heavy oil recovery is its high viscosity, most researchers have focused their investigations on this parameter in the laboratory as well as in the field resulting in disparaging results. This was attributed to oil being a complex poly-disperse blend of light and heavy paraffins, aromatics, resins and asphaltenes, which have diverse behaviors at reservoir temperature and pressures. The situation is exacerbated by a dearth of experimental data on gas diffusion coefficients in heavy oils due to the tedious nature of diffusivity measurements. Ultimately, the viscosity and thus oil recovery is regulated by pressure and its effect on the diffusion coefficient and oil swelling factors. The generation of a new phase within the crude and the differences in mobility between the new crude matrix and the precipitate readily enables removal of asphaltenes. Thus, an upgraded crude low in heavy metal, sulfur and nitrogen is more conducive for further purification.

Munroe, Norman

2009-01-30T23:59:59.000Z

297

Removal of Cu, Pb and Zn by foam fractionation and a soil washing process from contaminated industrial soils using soapberry-derived saponin: A comparative effectiveness assessment  

Science Journals Connector (OSTI)

Abstract The feasibility of using the eco-friendly biodegradable surfactant saponin (a plant-based surfactant) from soapberry and surfactin from Bacillus subtilis (BBK006) for the removal of heavy metals from contaminated industrial soil (6511mgkg?1 copper, 4955mgkg?1 lead, and 15090mgkg?1 zinc) by foam fractionation and a soil flushing process was evaluated under variation of fundamental factors (surfactant concentration, pH, temperature and time). The results of latter process showed that 12% Pb, 1617% Cu and 2124% Zn was removed by surfactin after 48h, whereas the removal of Pb, Cu and Zn was increased from 40% to 47%, 30% to 36% and 16% to 18% in presence of saponin with an increase from 24 to 72h at room temperature by the soil washing process at pH 4. In the foam fractionation process, the metal removal efficiencies were increased with increases in the saponin concentration (0.0750.15gL?1) and time (2472h), whereas the efficiency was decreased with increasing pH (410) and temperature (>40C). The removal efficiencies of Pb, Cu and Zn were increased significantly from 57% to 98%, 85% to 95% and 55% to 56% with an increase in the flow rate from 0.2 to 1.0Lmin?1 at 0.15gL?1 saponin (pH 4 and 30C). The present investigation indicated that the foam fractionation process is more efficient for the removal of heavy metal from contaminated industrial soil in comparison to the soil washing process. The plant-based eco-friendly biodegradable biosurfactant saponin can be used for environmental cleanup and pollution management.

Jyoti Prakash Maity; Yuh Ming Huang; Chun-Mei Hsu; Ching-I Wu; Chien-Cheng Chen; Chun-Yi Li; Jiin-Shuh Jean; Young-Fo Chang; Chen-Yen Chen

2013-01-01T23:59:59.000Z

298

The Influence of Metal Pollution on the Immune System A Potential Stressor for Marine Mammals in the North Sea  

E-Print Network [OSTI]

Kaliszan, R. (1996). Heavy metal pollution in surficialHeavy metals in Baltic herring and cod. Marine Pollutionheavy metals and infectious disease mortality in harbour porpoises from England and Wales. Environmental Pollution,

Kakuschke, Antje; Prange, Andreas

2007-01-01T23:59:59.000Z

299

Removal of copper from ferrous scrap  

DOE Patents [OSTI]

A process for removing copper from ferrous or other metal scrap in which the scrap is contacted with a polyvalent metal sulfide slag in the presence of an excess of copper-sulfide forming additive to convert the copper to copper sulfide which is extracted into the slag to provide a ratio of copper in the slag to copper in the metal scrap of at least about 10.

Blander, M.; Sinha, S.N.

1987-07-30T23:59:59.000Z

300

Removal of copper from ferrous scrap  

DOE Patents [OSTI]

A process for removing copper from ferrous or other metal scrap in which the scrap is contacted with a polyvalent metal sulfide slag in the presence of an excess of copper-sulfide forming additive to convert the copper to copper sulfide which is extracted into the slag to provide a ratio of copper in the slag to copper in the metal scrap of at least about 10.

Blander, Milton (12833 S. 82nd Ct., Palos Park, IL 60464); Sinha, Shome N. (5748 Drexel, 2A, Chicago, IL 60637)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Modeling Multi-Metal Ion Exchange in Biosorption  

E-Print Network [OSTI]

, may serve as a means for purifying industrial wastewaters that contain toxic heavy metal ions heavy metals often through ion exchange. This biosorption can be used for purification of metalModeling Multi-Metal Ion Exchange in Biosorption S I L K E S C H I E W E R A N D B O H U M I L V O

Volesky, Bohumil

302

Adsorption of Chromium (VI) by metal hydroxide sludge from the metal finishing  

E-Print Network [OSTI]

and Management, United States (2008)" #12;2 1 Introduction Industrial aqueous pollution (heavy metals) accounts sludge (MHS) during the treatment of their liquid effluents charged with heavy metals. Generally, a small for 30 to 40% of industrial pollution. Metal finishing is one of the sectors which contributes mostly

Paris-Sud XI, Université de

303

RADIOACTIVE ELEMENT REMOVAL FROM WATER USING GRAPHENE OXIDE (GO)  

E-Print Network [OSTI]

and may release significant amounts of radioactive material into the environment resulting in the potential for widespread exposure. These industries include mining, phosphate processing, metal ore processing, heavy mineral sand processing, titanium...

Concklin, Joshua Paul

2013-12-19T23:59:59.000Z

304

Multiple pollutant removal using the condensing heat exchanger: Preliminary test plan for Task 2, Pilot scale IFGT testing  

SciTech Connect (OSTI)

The purpose of Task 2 (IFGT Pilot-Scale Tests at the B&W Alliance Research Center) is to evaluate the emission reduction performance of the Integrated Flue Gas Treatment (IFGT) process for coal-fired applications. The IFGT system is a two-stage condensing heat exchanger that captures multiple pollutants -- while recovering waste heat. The IFGT technology offers the potential of addressing the emission of S0{sub 2} and particulate from electric utilities currently regulated under the Phase 1 and Phase 2 requirements defined in Title IV, and many of the air pollutants that will soon be regulated under Title III of the Clean Air Act. The performance data will be obtained at pilot-scale conditions similar to full-scale operating systems. The Task 2 IFGT tests have been designed to investigate several aspects of IFGT process conditions at a broader range of variables than would be feasible at a larger scale facility. The data from these tests greatly expands the IFGT performance database for coals and is needed for the technology to progress from the component engineering phase to system integration and commercialization. The performance parameters that will be investigated are as follows: SO{sub 2} removal; particulate removal; removal of mercury and other heavy metals; NO{sub x} removal; HF and HCl removal; NH{sub 3} removal; ammonia-sulfur compounds generation; and steam injection for particle removal. For all of the pollutant removal tests, removal efficiency will be based on measurements at the inlet and outlet of the IFGT facility. Heat recovery measurements will also be made during these tests to demonstrate the heat recovery provided by the IFGT technology. This report provides a preliminary test plan for all of the Task 2 pilot-scale IFGT tests.

Jankura, B.J.

1995-11-01T23:59:59.000Z

305

E-Print Network 3.0 - aluminum-fly ash metal Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

extent, bottom ash, contain elevated amounts of heavy metals, and fly ash... . The dioxinsfurans on ash then don't seem to create an environmental problem. Heavy metals are...

306

E-Print Network 3.0 - affecting metal concentration Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Surface Precipitation of Hydrolyzable Metal Ions on Oxide Surfaces S. E. Fendorf Heavy metal... retention on solid surfaces is a primary determinant in affecting the environmental...

307

E-Print Network 3.0 - aggregate structures metal Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

J. Camobreco... 161:740-750 1996 ABSTRACT Soils accumulate heavy metals when sewage sludge is applied to land... -borne metals could represent if mobilized, many studies have...

308

Reversible photodeposition and dissolution of metal ions  

DOE Patents [OSTI]

A cyclic photocatalytic process for treating waste water containing metal and organic contaminants. In one embodiment of the method, metal ions are photoreduced onto the photocatalyst and the metal concentrated by resolubilization in a smaller volume. In another embodiment of the method, contaminant organics are first oxidized, then metal ions removed by photoreductive deposition. The present invention allows the photocatalyst to be recycled until nearly complete removal of metal ions and organic contaminants is achieved.

Foster, Nancy S. (Boulder, CO); Koval, Carl A. (Golden, CO); Noble, Richard D. (Boulder, CO)

1994-01-01T23:59:59.000Z

309

Technologies for Boron Removal  

Science Journals Connector (OSTI)

Tests were performed to examine the removal of boron from aqueous solution either with polyvinyl alcohol (PVA) alone or by both PVA and other inorganic additives under room temperature. ... Added calcium hydroxide increased the co-removal of borate with PVA, and this offers a polishing treatment after borate removal by liming. ... As boron removal can be achieved by chemical precipitation and coagulation, it is logical to assume that the EC could remove boron from water and industrial effluent. ...

Yonglan Xu; Jia-Qian Jiang

2007-11-23T23:59:59.000Z

310

Identification of Molecular and Cellular Responses of Desulfovibrio vulgaris Biofilms under Culture Conditions Relevant to Field Conditions for Bioreduction of Heavy Metals  

SciTech Connect (OSTI)

Desulfovibrio vulgaris Hildenborough is a Gramnegative sulfate-reducing bacterium (SRB), and the physiology of SRBs can impact many anaerobic environments including radionuclide waste sites, oil reservoirs and metal pipelines. In an attempt to understand D. vulgaris as a population that can adhere to surfaces, D. vulgaris cultures were grown in a defined medium and analysed for carbohydrate production, motility and biofilm formation. Desulfovibrio vulgaris wild-type cells had increasing amounts of carbohydrate into stationary phase and approximately half of the carbohydrate remained internal. In comparison, a mutant that lacked the 200 kb megaplasmid, strain DMP, produced less carbohydrate and the majority of carbohydrate remained internal of the cell proper. To assess the possibility of carbohydrate re-allocation, biofilm formation was investigated. Wild-type cells produced approximately threefold more biofilm on glass slides compared with DMP; however, wild-type biofilm did not contain significant levels of exopolysaccharide. In addition, stains specific for extracellular carbohydrate did not reveal polysaccharide material within the biofilm. Desulfovibrio vulgaris wild-type biofilms contained long filaments as observed with scanning electron microscopy (SEM), and the biofilm-deficient DMP strain was also deficient in motility. Biofilms grown directly on silica oxide transmission electron microscopy (TEM) grids did not contain significant levels of an exopolysaccharide matrix when viewed with TEM and SEM, and samples stained with ammonium molybdate also showed long filaments that resembled flagella. Biofilms subjected to protease treatments were degraded, and different proteases that were added at the time of inoculation inhibited biofilm formation. The data indicated that D. vulgaris did not produce an extensive exopolysaccharide matrix, used protein filaments to form biofilm between cells and silica oxide surfaces, and the filaments appeared to be flagella. It is likely that D. vulgaris used flagella for more than a means of locomotion to a surface, but also used flagella, or modified flagella, to establish and/or maintain biofilm structure.

Fields, Matthew W [Montana State University

2007-10-01T23:59:59.000Z

311

Changes in species assemblages and diets of Collembola along a gradient of metal pollution  

E-Print Network [OSTI]

pollution. Keywords: Collembolan communities, Heavy metals, Gut contents 1. Introduction * Corresponding.1016/S0929-1393(02)00134-8 #12;2 Pollution by heavy metals, due to smelter, mining or agricultural the hypothesis that soil animal communities sampled along a gradient of heavy metal pollution show a) shifts

Paris-Sud XI, Université de

312

Humus forms and metal pollution in soil S. GILLET & J.F. PONGE  

E-Print Network [OSTI]

pollution by heavy metals. We have studied a poplar plantation downwind of an active zinc smelter. Three debris to assess the impact of heavy metal pollution on the humus forms and on soil faunal activity. We. Introduction Today, in northern France, numerous sites are polluted by heavy metals (Balabane et al., 1999

Paris-Sud XI, Université de

313

ORIGINAL ARTICLE The study of metal contamination in urban topsoils of Mexico City  

E-Print Network [OSTI]

- politan area of Mexico City. Keywords Heavy metals Á GIS Á Mexico City Á Urban topsoils Á Pollution Á to environmental quality. Typical pollutants of urban environments are heavy metals which are emitted distribution of heavy metals (Pb, Cu, Zn, Ba, Co, Cr, Ni and V) in the urban environments of Mexico City using

Short, Daniel

314

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

315

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

316

Fluid catalytic cracking of heavy petroleum fractions  

SciTech Connect (OSTI)

A process is claimed for fluid catalytic cracking of residuum and other heavy oils comprising of gas oil, petroleum residue, reduced and whole crudes and shale oil to produce gasoline and other liquid products which are separated in various streams in a fractionator and associated vapor recovery equipment. The heat from combustion of coke on the coked catalyst is removed by reacting sulfur-containing coke deposits with steam and oxygen in a separate stripper-gasifier to produce a low btu gas stream comprising of sulfur compounds, methane, carbon monoxide, hydrogen, and carbon dioxide at a temperature of from about 1100/sup 0/F. To about 2200/sup 0/F. The partially regenerated catalyst then undergoes complete carbon removal in a regeneration vessel. The regenerated catalyst is recycled for re-use in the cracking of heavy petroleum fractions. The liquid products are gasoline, distillates, heavy fuel oil, and light hydrocarbons.

McHenry, K.W.

1981-06-30T23:59:59.000Z

317

Desulfurization of heavy oil  

Science Journals Connector (OSTI)

Strategies for heavy oil desulfurization were evaluated by reviewing desulfurization literature and critically assessing the viability of the various methods for heavy oil. The desulfurization methods includin...

Rashad Javadli; Arno de Klerk

2012-03-01T23:59:59.000Z

318

Lithium metal reduction of plutonium oxide to produce plutonium metal  

DOE Patents [OSTI]

A method is described for the chemical reduction of plutonium oxides to plutonium metal by the use of pure lithium metal. Lithium metal is used to reduce plutonium oxide to alpha plutonium metal (alpha-Pu). The lithium oxide by-product is reclaimed by sublimation and converted to the chloride salt, and after electrolysis, is removed as lithium metal. Zinc may be used as a solvent metal to improve thermodynamics of the reduction reaction at lower temperatures. Lithium metal reduction enables plutonium oxide reduction without the production of huge quantities of CaO--CaCl.sub.2 residues normally produced in conventional direct oxide reduction processes.

Coops, Melvin S. (Livermore, CA)

1992-01-01T23:59:59.000Z

319

Turbomachinery debris remover  

DOE Patents [OSTI]

An apparatus for removing debris from a turbomachine. The apparatus includes housing and remotely operable viewing and grappling mechanisms for the purpose of locating and removing debris lodged between adjacent blades in a turbomachine.

Krawiec, Donald F. (Pittsburgh, PA); Kraf, Robert J. (North Huntingdon, PA); Houser, Robert J. (Monroeville, PA)

1988-01-01T23:59:59.000Z

320

The effects of metal and nutrient addition on Ribbed Mussels, Geukensia demissa, in the Great Sippewissett Salt Marsh and Eel Pond  

E-Print Network [OSTI]

the potential effects of nutrient loading and heavy metal pollution on salt marshes, researchers established highly contaminated with heavy metals. Nutrient additions did not promote or deter the health of mussels Marsh plots, perhaps a result of metal contamination. Keywords Salt marsh, nutrients, heavy metals

Vallino, Joseph J.

Note: This page contains sample records for the topic "heavy metals removal" 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

Building Removal Ongoing at DOE's Paducah Site | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Building Removal Ongoing at DOE's Paducah Site Building Removal Ongoing at DOE's Paducah Site Building Removal Ongoing at DOE's Paducah Site August 23, 2012 - 12:00pm Addthis Media Contact Buz Smith Robert.Smith@lex.doe.gov 270-441-6821 PADUCAH, KY - Work is ongoing at the Paducah Gaseous Diffusion Plant (PGDP) to raze a 65,000-square-foot facility known as the C-340 Metals Plant, which was used to make uranium metal during the Cold War. Department of Energy (DOE) cleanup contractor LATA Environmental Services of Kentucky began removing more than 1,500 panels of cement-asbestos siding from the Metals Plant complex Wednesday in anticipation of New Jersey-based LVI Services starting demolition Sept. 19. Demolition work is projected to last through the end of calendar 2012. "This is an important milestone because the C-340 Metals Plant is the

322

Trace metal concentration and fish size: Variation among fish species in a Mediterranean river  

E-Print Network [OSTI]

29 April 2014 Accepted 12 May 2014 Keywords: Bioaccumulation Heavy metals Llobregat River species in an Iberian river with moderate metal pollution. Al, Fe and Zn were the most abundant metals trace elements (Bervoets and Blust, 2003; Noël et al., 2013). Heavy metals in fish represent a potential

García-Berthou, Emili

323

Preparation of CoMo supported multi-wall carbon nanotube for hydrocracking of extra heavy oil  

Science Journals Connector (OSTI)

Abstract In this study, multi-wall carbon nanotube (MWCNT) supported CoMo nanocatalysts with changes in synthesis steps, one and two-step, were prepared through impregnation to be used in extra heavy oil hydrocracking process. In both of the synthesized nanocatalysts, the Co/Mo weight ratio was 1/3. The nanocatalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and accelerated surface area and porosimetry (ASAP) methods. The results showed that the nanocatalysts prepared through a two-step impregnation method had higher surface area and pore volume than the other synthesized nanocatalysts. The nanocatalysts were used in hydrocracking process under mild operating conditions, 260300C and at H2 initial pressure of 5MPa. Hydrocracking of extra heavy oil was conducted in an autoclave reactor. The results indicated that both nanocatalysts were capable of hydrocracking heavy oil at mild operating conditions. However, the nanocatalysts synthesized through the two-step impregnation exhibited higher performance, better heavy oil to light oil conversion, and better sulfur removal than the other methods. This superiority is due to the nanocatalyst's structure and better distribution of metal clusters on the support.

Mohsen Rahimi Rad; Alimorad Rashidi; Leila Vafajoo; Maryam Rashtchi

2014-01-01T23:59:59.000Z

324

Toxic heavy metals: materials cycle optimization.  

Science Journals Connector (OSTI)

...United States Total consumption, short % total consumption tons x 10-6 in recycled...units (0.01 quad) of fuel would be saved, along...significantly, requiring lower engine compression ratios and ceteris paribus reduced fuel econ- omy. This has...

R U Ayres

1992-01-01T23:59:59.000Z

325

Recrystallization of heavy metals after cold deformation  

SciTech Connect (OSTI)

Rapid heating experiments, of the order of tens of seconds, were performed on a 90%W-7%Ni-3%Fe alloy, which was cold worked by rotary swaging to 50% reduction in diameter. It was found that even very short periods of heating brings to the separation of the elongated tungsten grains into small round ones, therefore refining the microstructure. The process involves melting of the matrix and its penetration into the tungsten grains. During cooling, very small, new grains are precipitated. It is suggested that grain refining is achieved by penetration of the molten matrix into the solid tungsten grains through subgrain boundaries.

Goren-Muginstein, G.R.; Rosen, A. [Israel Inst. of Tech., Haifa (Israel). Dept. of Materials Engineering

1996-06-01T23:59:59.000Z

326

Sovent Based Enhanced Oil Recovery for In-Situ Upgrading of Heavy Oil Sands  

SciTech Connect (OSTI)

With the depletion of conventional crude oil reserves in the world, heavy oil and bitumen resources have great potential to meet the future demand for petroleum products. However, oil recovery from heavy oil and bitumen reservoirs is much more difficult than that from conventional oil reservoirs. This is mainly because heavy oil or bitumen is partially or completely immobile under reservoir conditions due to its extremely high viscosity, which creates special production challenges. In order to overcome these challenges significant efforts were devoted by Applied Research Center (ARC) at Florida International University and The Center for Energy Economics (CEE) at the University of Texas. A simplified model was developed to assess the density of the upgraded crude depending on the ratio of solvent mass to crude oil mass, temperature, pressure and the properties of the crude oil. The simplified model incorporated the interaction dynamics into a homogeneous, porous heavy oil reservoir to simulate the dispersion and concentration of injected CO{sub 2}. The model also incorporated the characteristic of a highly varying CO{sub 2} density near the critical point. Since the major challenge in heavy oil recovery is its high viscosity, most researchers have focused their investigations on this parameter in the laboratory as well as in the field resulting in disparaging results. This was attributed to oil being a complex poly-disperse blend of light and heavy paraffins, aromatics, resins and asphaltenes, which have diverse behaviors at reservoir temperature and pressures. The situation is exacerbated by a dearth of experimental data on gas diffusion coefficients in heavy oils due to the tedious nature of diffusivity measurements. Ultimately, the viscosity and thus oil recovery is regulated by pressure and its effect on the diffusion coefficient and oil swelling factors. The generation of a new phase within the crude and the differences in mobility between the new crude matrix and the precipitate readily enables removal of asphaltenes. Thus, an upgraded crude low in heavy metal, sulfur and nitrogen is more conducive for further purification.

Norman Munroe

2009-01-30T23:59:59.000Z

327

Thiacrown polymers for removal of mercury from waste streams  

DOE Patents [OSTI]

Thiacrown polymers immobilized to a polystyrene-divinylbenzene matrix react with Hg.sup.2+ under a variety of conditions to efficiently and selectively remove Hg.sup.2+ ions from acidic aqueous solutions, even in the presence of a variety of other metal ions. The mercury can be recovered and the polymer regenerated. This mercury removal method has utility in the treatment of industrial wastewater, where a selective and cost-effective removal process is required.

Baumann, Theodore F. (Tracy, CA); Reynolds, John G. (San Ramon, CA); Fox, Glenn A. (Livermore, CA)

2002-01-01T23:59:59.000Z

328

Waste Biomass-Extracted Surfactants for Heavy Oil Removal  

Science Journals Connector (OSTI)

The potential synergism between biobased surfactants, produced from the alkaline extraction of waste biomass, and a synthetic surfactant was assessed. ... Since the principles of soil washing (critical Ca) were first developed for reservoir engineering, one expects that the ultralow (surfactant-enhanced oil recovery operations. ...

Matthew D. Baxter; Edgar Acosta; Enzo Montoneri; Silvia Tabasso

2014-02-03T23:59:59.000Z

329

Functional Mesoporous Metal-Organic Frameworks for the Capture...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Functional Mesoporous Metal-Organic Frameworks for the Capture of Heavy Metal Ions and Size-Selective Catalysis Previous Next List Qian-Rong Fang, Da-Qian Yuan, Julian Sculley,...

330

Risk Removal | Department of Energy  

Energy Savers [EERE]

Risk Removal Risk Removal Workers safely remove old mercury tanks from the Y-12 National Security Complex. Workers safely remove old mercury tanks from the Y-12 National Security...

331

E-Print Network 3.0 - active site metal Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: collected from a reference site and a site with a long-term history of heavy-metal pollution. Direct... the metal-polluted site were more tolerant of metals but less...

332

Silica Scaling Removal Process  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Silica Scaling Removal Process Silica Scaling Removal Process Silica Scaling Removal Process Scientists at Los Alamos National Laboratory have developed a novel technology to remove both dissolved and colloidal silica using small gel particles. Available for thumbnail of Feynman Center (505) 665-9090 Email Silica Scaling Removal Process Applications: Cooling tower systems Water treatment systems Water evaporation systems Potential mining applications (produced water) Industry applications for which silica scaling must be prevented Benefits: Reduces scaling in cooling towers by up to 50% Increases the number of cycles of concentration substantially Reduces the amount of antiscaling chemical additives needed Decreases the amount of makeup water and subsequent discharged water (blowdown) Enables considerable cost savings derived from reductions in

333

NETL: Gasification Systems - Warm Gas Multi-Contaminant Removal System  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Warm Gas Multi-Contaminant Removal System Warm Gas Multi-Contaminant Removal System Project Number: DE-SC00008243 TDA Research, Inc. is developing a high-capacity, low-cost sorbent that removes anhydrous ammonia (NH3), mercury (Hg), and trace contaminants from coal- and coal/biomass-derived syngas. The clean-up system will be used after the bulk warm gas sulfur removal step, and remove NH3 and Hg in a regenerable manner while irreversibly capturing all other trace metals (e.g., Arsenic, Selenium) reducing their concentrations to sub parts per million (ppm) levels. Current project plans include identifying optimum chemical composition and structure that provide the best sorbent performance for removing trace contaminants, determining the effect of operating parameters, conducting multiple-cycle experiments to test the life of the sorbent for NH3 and Hg removal, and conducting a preliminary design of the sorbent reactor.

334

Preliminary Evaluation of Removing Used Nuclear Fuel From Nine Shutdown Sites  

SciTech Connect (OSTI)

The Blue Ribbon Commission on Americas Nuclear Future identified removal of stranded used nuclear fuel at shutdown sites as a priority so that these sites may be completely decommissioned and put to other beneficial uses. In this report, a preliminary evaluation of removing used nuclear fuel from nine shutdown sites was conducted. The shutdown sites included Maine Yankee, Yankee Rowe, Connecticut Yankee, Humboldt Bay, Big Rock Point, Rancho Seco, Trojan, La Crosse, and Zion. At these sites a total of 7649 used nuclear fuel assemblies and a total of 2813.2 metric tons heavy metal (MTHM) of used nuclear fuel are contained in 248 storage canisters. In addition, 11 canisters containing greater-than-Class C (GTCC) low-level radioactive waste are stored at these sites. The evaluation was divided in four components: characterization of the used nuclear fuel and GTCC low-level radioactive waste inventory at the shutdown sites an evaluation of the onsite transportation conditions at the shutdown sites an evaluation of the near-site transportation infrastructure and experience relevant to the shipping of transportation casks containing used nuclear fuel from the shutdown sites an evaluation of the actions necessary to prepare for and remove used nuclear fuel and GTCC low-level radioactive waste from the shutdown sites. Using these evaluations the authors developed time sequences of activities and time durations for removing the used nuclear fuel and GTCC low-level radioactive waste from a single shutdown site, from three shutdown sites located close to each other, and from all nine shutdown sites.

Maheras, Steven J. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Best, Ralph [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Ross, Steven B. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Buxton, Kenneth A. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); England, Jeffery L. [Savannah River National Laboratory, Aiken, SC (United States); McConnell, Paul [Sandia National Laboratories, Albuquerque, NM (United States)

2013-04-30T23:59:59.000Z

335

Tritium emission reduction at Darlington tritium removal facility using a Bubbler System  

SciTech Connect (OSTI)

Ontario Power Generation Nuclear (OPGN) has a 4 x 880 MWe CANDU nuclear station at its Darlington Nuclear Div. located in Bowmanville. The station operates a Tritium Removal Facility (TRF) to reduce and maintain low tritium levels in the Moderator and Heat Transport heavy water systems of Ontario's CANDU fleet by extracting, concentrating, immobilizing and storing as a metal tritide. Minimizing tritium releases to the environment is of paramount importance to ensure that dose to the public is as low as reasonably achievable (ALARA) and to maintain credibility with the Public. Tritium is removed from the Cryogenic Distillation System to the Tritium Immobilization System (TIS) glove box via a transfer line that is protected by a rupture disc and relief valve. An overpressure event in 2003 had caused the rupture disc to blow, resulting in the release of a significant quantity of elemental tritium into the relief valve discharge line, which ties into the contaminated exhaust system. As a result of a few similar events occurring over a number of years of TRF operation, the released elemental tritium would have been converted to tritium oxide in the presence of a stagnant moist air environment in the stainless steel discharge line. A significant amount of tritium oxide hold-up in the discharge line was anticipated. To minimize any further releases to the environment, a Bubbler System was designed to remove and recover the tritium from the discharge line. This paper summarizes the results of several Bubbler recovery runs that were made over a period of a month. Approximately 3500 Ci of tritium oxide and 230 Ci of elemental tritium were removed and collected. The tritium contained in the water produced from the Bubbler system was later safely recovered in the station's downgraded D{sub 2}O clean-up and recovery system. (authors)

Kalyanam, K.; Leilabadi, A.; El-Behairy, O.; Williams, G. I. D.; Vogt, H. K. [Ontario Power Generation, Darlington Nuclear, PO Box 4000, Bowmanville, ON L1C 3Z8 (Canada)

2008-07-15T23:59:59.000Z

336

Exploiting heavy oil reserves  

E-Print Network [OSTI]

North Sea investment potential Exploiting heavy oil reserves Beneath the waves in 3D Aberdeen the potential of heavy oil 8/9 Taking the legal lessons learned in the north Sea to a global audience 10 potential Exploiting heavy oil reserves Aberdeen: A community of science AT WORK FOR THE ENERGY SECTOR ISSUE

Levi, Ran

337

Savannah River Site Removes Dome, Opening Reactor for Recovery Act  

Broader source: Energy.gov (indexed) [DOE]

Savannah River Site Removes Dome, Opening Reactor for Recovery Act Savannah River Site Removes Dome, Opening Reactor for Recovery Act Decommissioning Savannah River Site Removes Dome, Opening Reactor for Recovery Act Decommissioning American Recovery and Reinvestment Act workers achieved a significant milestone in the decommissioning of a Cold War reactor at the Savannah River Site this month after they safely removed its rusty, orange, 75-foot-tall dome. With the help of a 660-ton crane and lifting lugs, the workers pulled the 174,000-pound dome off the Heavy Water Components Test Reactor, capping more than 16 months of preparations. Savannah River Site Removes Dome, Opening Reactor for Recovery Act Decommissioning More Documents & Publications Recovery Act Changes Hanford Skyline with Explosive Demolitions Recovery Act Workers Add Time Capsule Before Sealing Reactor for Hundreds

338

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

339

Coated Metal Articles and Method of Making  

DOE Patents [OSTI]

The method of protectively coating metallic uranium which comprises dipping the metallic uranium in a molten alloy comprising about 20-75% of copper and about 80-25% of tin, dipping the coated uranium promptly into molten tin, withdrawing it from the molten tin and removing excess molten metal, thereupon dipping it into a molten metal bath comprising aluminum until it is coated with this metal, then promptly withdrawing it from the bath.

Boller, Ernest R.; Eubank, Lowell D.

2004-07-06T23:59:59.000Z

340

A COMPARISON OF FRUIT REMOVAL BY BATS AND BIRDS FROM PIPER HISfIDUM SW.  

E-Print Network [OSTI]

... ; A COMPARISON OF FRUIT REMOVAL BY BATS AND BIRDS FROM PIPER HISfIDUM SW. (PIPERACEAE. Central AlOOrica (Received: January 5, 1989) ABSTRAC,r I measured fruit removal by bats and birds from in recently distubed second growth habitat during a period of heavy P. hispidum fruiting; plants are e

O'Donnell, Sean

Note: This page contains sample records for the topic "heavy metals removal" 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

Excavators are used for the rapid removal of soil and other materials in mines, quarries, and construction sites.  

E-Print Network [OSTI]

Abstract Excavators are used for the rapid removal of soil and other materials in mines, quarries of metals, quarrying of rock, and con- struction of highways require the rapid removal and han- dling

Stentz, Tony

342

E-Print Network 3.0 - actinide removal process Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

no 5-6, Tome 33, Mai-Juin 1972,page C3-57 RELATIVISTIC ELECTRONIC BAND STRUCTURE OF THE HEAVY METALS Summary: -metalliques presentent beaucoup de proprieth interessantes mais ma1...

343

Structural Basis for Metal Binding Specificity: the N-terminal Cadmium Binding Domain of the  

E-Print Network [OSTI]

In bacteria, P1-type ATPases are responsible for resistance to di- and monovalent toxic heavy metals by taking years and no common mechanism for resistance toward toxic heavy metals such as Cd(II), Zn(II), HgStructural Basis for Metal Binding Specificity: the N-terminal Cadmium Binding Domain of the P1

Scott, Robert A.

344

HEAVY-DUTYDIEGRINDERS EXTRAROBUSTERECTIFIEUSESPOURMATRICES  

E-Print Network [OSTI]

HEAVY-DUTYDIEGRINDERS EXTRAROBUSTERECTIFIEUSESPOURMATRICES HEAVYDUTYRECTIFICADORDEMATRICES OPERATOR tool. Keep cord away from heat, oil, sharp edges, or moving parts. Damaged or entangled cords increase

Kleinfeld, David

345

Bioconversion of Heavy oil.  

E-Print Network [OSTI]

??70 % of world?s oil reservoirs consist of heavy oil, and as the supply of conventional oil decreases, researchers are searching for new technologies to (more)

Steinbakk, Sandra

2011-01-01T23:59:59.000Z

346

Stabilization of Electrocatalytic Metal Nanoparticles at Metal...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Electrocatalytic Metal Nanoparticles at Metal-Metal Oxide-Graphene Triple Junction Points. Stabilization of Electrocatalytic Metal Nanoparticles at Metal-Metal Oxide-Graphene...

347

Condensate removal device  

DOE Patents [OSTI]

A condensate removal device is disclosed which incorporates a strainer in unit with an orifice. The strainer is cylindrical with its longitudinal axis transverse to that of the vapor conduit in which it is mounted. The orifice is positioned inside the strainer proximate the end which is remoter from the vapor conduit.

Maddox, James W. (Newport News, VA); Berger, David D. (Alexandria, VA)

1984-01-01T23:59:59.000Z

348

A study of plasma etching for use on active metals  

E-Print Network [OSTI]

Active metals can be used as a getter pump, removing impurities in ultra-pure high vacuum environments. To relieve the difficulties involved with the transportation, storage and handling of these metals, a process is being ...

Nishimoto, Keane T. (Keane Takeshi), 1981-

2005-01-01T23:59:59.000Z

349

E-Print Network 3.0 - albumin metal interaction Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

STABILIZATION PONDS... Sheva, Israel (RecewedMay 1986) Abstract--The distribution of toxic heavy metals ... Source: Ben-Gurion University, Department of Electrical and Computer...

350

E-Print Network 3.0 - aastat metal travel Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

smell By Tina Hesman | St. Louis Post-Dispatch Posted March 2, 2003 ST. LOUIS -- Heavy metal Source: Suslick, Kenneth S. - Department of Chemistry, University of Illinois at...

351

E-Print Network 3.0 - alkaline-earth metal cations Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

K. (2002): A novel group of alkaline earth metal amides: synthesis... ): Not just heavy "Grignards": Recent advances in the organometallic chemistry of the alkaline earth...

352

E-Print Network 3.0 - anthropogenic trace metal Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Geosciences 57 Heavy metal contamination in highway soils. Comparison of Corpus Christi, Texas and Cincinnati, Ohio shows organic matter is key to mobility...

353

SUPRI heavy oil research program  

SciTech Connect (OSTI)

The 14th Annual Report of the SUPRI Heavy Oil Research Program includes discussion of the following topics: (1) A Study of End Effects in Displacement Experiments; (2) Cat Scan Status Report; (3) Modifying In-situ Combustion with Metallic Additives; (4) Kinetics of Combustion; (5) Study of Residual Oil Saturation for Steam Injection and Fuel Concentration for In-Situ Combustion; (6) Analysis of Transient Foam Flow in 1-D Porous Media with Computed Tomography; (7) Steam-Foam Studies in the Presence of Residual Oil; (8) Microvisualization of Foam Flow in a Porous Medium; (9) Three- Dimensional Laboratory Steam Injection Model; (10) Saturation Evaluation Following Water Flooding; (11) Numerical Simulation of Well-to-Well Tracer Flow Test with Nonunity Mobility Ratio.

Aziz, K.; Ramey, H.J. Jr.; Castanier, L.M.

1991-12-01T23:59:59.000Z

354

Removal of arsenic compounds from petroliferous liquids  

DOE Patents [OSTI]

The present invention in one aspect comprises a process for removing arsenic from petroliferous-derived liquids by contacting said liquid with a divinylbenzene-crosslinked polystyrene polymer (i.e. PS-DVB) having catechol ligands anchored to said polymer, said contacting being at an elevated temperature. In another aspect, the invention is a process for regenerating spent catecholated polystyrene polymer by removal of the arsenic bound to it from contacting petroliferous liquid in accordance with the aspect described above which regenerating process comprises: (a) treating said spent catecholated polystyrene polymer with an aqueous solution of at least one member selected from the group consisting of carbonates and bicarbonates of ammonium, alkali metals, and alkaline earth metals, said solution having a pH between about 8 and 10, and said treating being at a temperature in the range of about 20/sup 0/ to 100/sup 0/C; (b) separating the solids and liquids from each other. In a preferred embodiment the regeneration treatment is in two steps wherein step: (a) is carried out with an aqueous alcoholic carbonate solution which includes at least one lower alkyl alcohol, and, steps (c) and (d) are added. Steps (c) and (d) comprise: (c) treating the solids with an aqueous alcoholic solution of at least one ammonium, alkali or alkaline earth metal bicarbonate at a temperature in the range of about 20 to 100/sup 0/C; and (d) separating the solids from the liquids.

Fish, R.H.

1984-04-06T23:59:59.000Z

355

DOE Removes Brookhaven Contractor  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DOE Removes DOE Removes Brookhaven Contractor Peña sends a message to DOE facilities nationwide INSIDE 2 Accelerator Rx 4 FermiKids 6 Spring at Fermilab Photos courtesy of Brookhaven National Laboratory by Judy Jackson, Office of Public Affairs Secretary of Energy Federico Peña announced on Thursday, May 1, that the Department of Energy would immediately terminate the current management contract with Associated Universities, Inc. at Brookhaven National Laboratory in Upton, New York. Peña said that he made the decision after receiving the results of a laboratory safety management review conducted by the independent oversight arm of DOE's Office of Environment, Safety and Health. In addition, the Secretary said he found unacceptable "the continued on page 8 Volume 20 Friday, May 16, 1997

356

Pneumatic soil removal tool  

DOE Patents [OSTI]

A soil removal tool is provided for removing radioactive soil, rock and other debris from the bottom of an excavation, while permitting the operator to be located outside of a containment for that excavation. The tool includes a fixed jaw, secured to one end of an elongate pipe, which cooperates with a movable jaw pivotably mounted on the pipe. Movement of the movable jaw is controlled by a pneumatic cylinder mounted on the pipe. The actuator rod of the pneumatic cylinder is connected to a collar which is slidably mounted on the pipe and forms part of the pivotable mounting assembly for the movable jaw. Air is supplied to the pneumatic cylinder through a handle connected to the pipe, under the control of an actuator valve mounted on the handle, to provide movement of the movable jaw. 3 figs.

Neuhaus, J.E.

1992-10-13T23:59:59.000Z

357

Removal of arsenic compounds from petroliferous liquids  

DOE Patents [OSTI]

Described is a process for removing arsenic from petroliferous derived liquids by contacting said liquid at an elevated temperature with a divinylbenzene-crosslinked polystyrene having catechol ligands anchored thereon. Also, described is a process for regenerating spent catecholated polystyrene by removal of the arsenic bound to it from contacting petroliferous liquid as described above and involves: a. treating said spent catecholated polystyrene, at a temperature in the range of about 20.degree. to 100.degree. C. with an aqueous solution of at least one carbonate and/or bicarbonate of ammonium, alkali and alkaline earth metals, said solution having a pH between about 8 and 10 and, b. separating the solids and liquids from each other. Preferably the regeneration treatment is in two steps wherein step (a) is carried out with an aqueous alcoholic carbonate solution containing lower alkyl alcohol, and, steps (a) and (b) are repeated using a bicarbonate.

Fish, Richard H. (Berkeley, CA)

1985-01-01T23:59:59.000Z

358

Quarkonia and heavy flavors at the LHC  

E-Print Network [OSTI]

Perspectives for quarkonia and heavy flavors measurements in heavy ion collisions at LHC are reviewed

P. Crochet

2005-03-14T23:59:59.000Z

359

Biosorption of anionic metal complexes Hui Niu and Bohumil Volesky*  

E-Print Network [OSTI]

containing toxic heavy metals, often in anionic complex forms such as anionic chromate (CrO4 2- ), vanadate1 Biosorption of anionic metal complexes Hui Niu and Bohumil Volesky* http Street, MONTREAL, Canada H3A 2B2 *corresponding author Anionic metal complexes, are very effectively

Volesky, Bohumil

360

Metal Aminoboranes  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Metal Aminoboranes Metal Aminoboranes Metal Aminoboranes Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. June 25, 2013 Metal Aminoboranes Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. Available for thumbnail of Feynman Center (505) 665-9090 Email Metal Aminoboranes Metal aminoboranes of the formula M(NH.sub.2BH.sub.3).sub.n have been synthesized. Metal aminoboranes are hydrogen storage materials. Metal aminoboranes are also precursors for synthesizing other metal aminoboranes. Metal aminoboranes can be dehydrogenated to form hydrogen and a reaction product. The reaction product can react with hydrogen to form a hydrogen storage material. Metal aminoboranes can be included in a kit. U.S. Patent No.: 7,713,506 (DOE S-112,798)

Note: This page contains sample records for the topic "heavy metals removal" 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

E-Print Network 3.0 - airbone trace metals Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Loss of Heavy Metals from Experimental Salt Marsh Plots Summary: L of 12 M trace metal grade hydrochloric acid (HCl) and reheated the samples to 65-80 C in a water bath......

362

Workers Demolish Metals Plant at Paducah Site | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Demolish Metals Plant at Paducah Site Demolish Metals Plant at Paducah Site Workers Demolish Metals Plant at Paducah Site February 21, 2013 - 12:00pm Addthis The Metals Plant is shown before workers removed panels from the structure ln 2012. The Metals Plant is shown before workers removed panels from the structure ln 2012. Workers remove panels from the Metals Plant in September 2012. Workers remove panels from the Metals Plant in September 2012. About half of the complex was demolished by the end of December 2012, ahead of schedule. About half of the complex was demolished by the end of December 2012, ahead of schedule. An ultra-high-reach demolition machine — similar to equipment used to demolish Yankee Stadium — cuts into upper portions of the building’s last standing section late last month.

363

Evaluation of environmental pollution and possible management options of heavy oil fly ash  

Science Journals Connector (OSTI)

Due to the presence of toxic metals, dumping of heavy oil fly ash (HOFA) is causing ever-growing environmental problem including the pollution of air, water and soil. The present study investigates the possibl...

Abdullah Mofarrah; Tahir Husain

2013-01-01T23:59:59.000Z

364

Heavy Hybrid mesons Masses  

E-Print Network [OSTI]

We estimate the ground state masses of the heavy hybrid mesons using a phenomenological QCD-type potential. 0^{- -},1^{- -},0^{- +},1^{- +} and 0^{+ -} J^{PC} states are considered.

F. Iddir; L. Semlala

2006-11-13T23:59:59.000Z

365

HEAVY ION INERTIAL FUSION  

E-Print Network [OSTI]

Accelerators as Drivers for Inertially Confined Fusion, W.B.LBL-9332/SLAC-22l (1979) Fusion Driven by Heavy Ion Beams,OF CALIFORNIA f Accelerator & Fusion Research Division

Keefe, D.

2008-01-01T23:59:59.000Z

366

Ordered Vertex Removal Subgraph Problems  

E-Print Network [OSTI]

of the vertex removal and subgraph problems are shown to be P­complete. In addition, a natural lex­ icographicOrdered Vertex Removal and Subgraph Problems Ray Greenlaw Department of Computer Science University­8703196. #12; Vertex Removal and Graph Problems Ray Greenlaw Department of Computer Science FR­35

Greenlaw, Ray

367

The washability of lignites for clay removal  

SciTech Connect (OSTI)

In the washability research of the Seyitomer Lignites (Kutahya-Turkey), with lower calorific value (1,863 kcal/kg) and high ash content (51.91%), by heavy medium separation, it was found out that middling clay in the coal had an effect to change the medium density. To prevent this problem, a trommel sieve with 18 and 5 mm aperture diameter was designed, and the clay in the coal was tried to be removed using it before the coal was released to heavy medium. Following that, the obtained coal in -100 + 18 mm and -18 + 5 mm fractions was subjected to sink and float test having 1.4 gcm{sup -3} and 1.7 gcm{sup -3} medium densities (-5 mm fraction will be evaluated in a separate work). Depending on the raw coal, with the floating of -100 + 18 mm and -18 + 5 mm size fraction in 1.4 gcm{sup -3} medium density, clean coal with 60.10% combustible matter recovery, 19.12% ash, and 3,150 kcal/kg was obtained. Also floating of the samples sinking in 1.4 gcm{sup -3} in the medium density (1.7 gcm{sup -3}), middling with 18.70% combustible matter recovery, 41.93% ash, 2,150 kcal/kg, and tailing having 78.31% ash were obtained.

Oteyaka, B.; Yamik, A.; Ucar, A.; Sahbaz, O.; Demir, U. [Dumlupinar University, Kutahya (Turkey). Dept. of Mining Engineering

2008-07-01T23:59:59.000Z

368

Towards Heavy Fermions in Europium Intermetallic Compounds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Towards Heavy Fermions in Towards Heavy Fermions in Europium Intermetallic Compounds Towards Heavy Fermions in Europium Intermetallic Compounds Print Wednesday, 29 July 2009 00:00 For decades, intermetallic compounds of rare-earth metals have been favorite systems of the research community studying strong electron correlations in solids. Nowadays rare-earth intermetallics are often treated as model systems for studies of zero-temperature quantum critical phase transitions, since heavy-fermion rare-earth compounds (in which the electron effective mass is orders of magnitude larger than the bare electron mass) have provided the clearest evidence for these continuous phase transitions, which are controlled by such parameters as chemical composition, magnetic field, and pressure, rather than temperature. A new study of a europium-based compound by an international team led by researchers from the Technische Universität Dresden in Germany hints that this compound could join well-known compounds of cerium, ytterbium, and uranium as a new material suitable for research on quantum critical transitions. This finding is exciting, since physicists hope that the use of a new material will give an additional degree of freedom for researching quantum critical behavior.

369

Gel bead composition for metal adsorption  

DOE Patents [OSTI]

The invention is a gel bead comprising propylene glycol alginate and bone gelatin and is capable of removing metals such as Sr and Cs from solution without adding other adsorbents. The invention could have application to the nuclear industry's waste removal activities.

Scott, Charles D. (Oak Ridge, TN); Woodward, Charlene A. (Oak Ridge, TN); Byers, Charles H. (Oak Ridge, TN)

1991-01-01T23:59:59.000Z

370

Chapter 1 - Refining Heavy Oil and Extra-heavy Oil  

Science Journals Connector (OSTI)

The definitions of heavy oil, extra-heavy oil, and tar sand bitumen are inadequate insofar as the definitions rely upon a single physical property to define a complex feedstock. This chapter presents viable options to the antiquated definitions of the heavy feedstocks (heavy oil, extra-heavy oil, and tar sand bitumen) as well as an introduction to the various aspects of heavy feedstock refining in order for the reader to place each feedstock in the correct context of properties, behavior, and refining needs.

James G. Speight

2013-01-01T23:59:59.000Z

371

Development of an on-site ex-situ unsaturated-flow remediation process for trace metal contaminated soils.  

E-Print Network [OSTI]

??Innovative means and methods were tested to develop an economical, pragmatic and environmentally sustainable soil remediation process for heavy metal contaminated soils. An unsaturated-flow soil (more)

Andrade, Marc-David

2005-01-01T23:59:59.000Z

372

Photobiont diversity in lichens from metal-rich substrata based on ITS rDNA sequences  

E-Print Network [OSTI]

sensitive partner of lichen symbiosis in metal pollution. For this reason the presence of a metal tolerant photobiont in lichens may be a key factor of ecological success of lichens growing on metal polluted heavy metal content (in localities as well as lichen thalli) and photobiont diversity. Presence

373

Layered inorganic/organic mercaptopropyl pendant chain hybrid for chelating heavy cations  

SciTech Connect (OSTI)

Graphical abstract: Crystalline lamellar silicate RUB-18 was immobilized with mercaptopropyl groups at the surface and then used as support for cadmium and lead removal from aqueous solutions. Highlights: Black-Right-Pointing-Pointer Synthetic methodology requires intercalation. Black-Right-Pointing-Pointer Organofunctionalized ilerite compound as sorbent. Black-Right-Pointing-Pointer Active mercaptopropyl groups remove cations. Black-Right-Pointing-Pointer High maximum sorption capacity for cadmium. -- Abstract: Heavy metal sorbents with uptake capacities for divalent cadmium and lead cation removal from aqueous solutions have been synthesized by grafting mercaptopropyltrimethoxysilane onto the surface of two different precursors obtained from lamellar ilerite, its acidic and the cetyltrimethylammonium exchanged forms. The organofunctionalization was carried out by two different procedures: reflux and solvent evaporation methodologies. Elemental analysis data based on carbon content gave 1.37 and 3.53 mmol of organic pendant groups per gram of hybrid by the reflux method, when starting from acidic ilerite and the surfactant form. X-ray diffraction corroborated the maintenance of the original crystallinity. Infrared spectroscopy and nuclear magnetic resonance for {sup 29}Si and {sup 13}C nuclei are in agreement with the success of the proposed method. The sulfur basic centers attached to the lamellar structure are used to coordinate both cations at the solid/liquid interface. The isotherms were obtained through the batchwise process and the experimental data were adjusted to the Freundlich model. The maximum sorption capacities of 5.55 and 5.12 mmol g{sup -1} for lead and 6.10 and 7.10 mmol g{sup -1} for cadmium were obtained for organofunctionalized ilerite and its surfactant form, synthesized by reflux methodology. This behavior suggested that these hybrids could be employed as promising sorbents with a polluted system.

Macedo, Thais R. [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil)] [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil); Petrucelli, Giovanni C. [Institute of Chemistry, Federal University of Goias, Jatai, P.O. Box 03, 75805-190 Jatai, GO (Brazil)] [Institute of Chemistry, Federal University of Goias, Jatai, P.O. Box 03, 75805-190 Jatai, GO (Brazil); Pinto, Alane A. [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil) [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil); Institute of Chemistry, Federal University of Goias, Jatai, P.O. Box 03, 75805-190 Jatai, GO (Brazil); Airoldi, Claudio, E-mail: airoldi@iqm.unicamp.br [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil)] [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil)

2011-12-15T23:59:59.000Z

374

Copper Removal from Fuel by Solid-Supported Polyamine Chelating Agents  

Science Journals Connector (OSTI)

Copper Removal from Fuel by Solid-Supported Polyamine Chelating Agents ... The presence of copper in hydrocarbon fuels impairs fuel stability and jet-engine performance. ... The advantages of this approach are that the chelators have high specificity for transition metal ions, that copper ions are directly removed from the fuel, that no metal ions need to be exchanged for binding copper, that no chemicals need be added to the fuel, and that the copper may be recovered after treatment of the fuel. ...

Dhanajay B. Puranik; Yan Guo; Alok Singh; Robert E. Morris; A. Huang; L. Salvucci; R. Kamin; V. David; E. L. Chang

1998-05-27T23:59:59.000Z

375

Ozone removal by HVAC filters  

Science Journals Connector (OSTI)

Residential and commercial HVAC filters that have been loaded with particles during operation in the field can remove ozone from intake or recirculated air. However, knowledge of the relative importance of HVAC filters as a removal mechanism for ozone in residential and commercial buildings is incomplete. We measured the ozone removal efficiencies of clean (unused) fiberglass, clean synthetic filters, and field-loaded residential and commercial filters in a controlled laboratory setting. For most filters, the ozone removal efficiency declined rapidly but converged to a non-zero (steady-state) value. This steady-state ozone removal efficiency varied from 0% to 9% for clean filters. The mean steady-state ozone removal efficiencies for loaded residential and commercial filters were 10% and 41%, respectively. Repeated exposure of filters to ozone following a 24-h period of no exposure led to a regeneration of ozone removal efficiency. Based on a theoretical scaling analysis of mechanisms that are involved in the ozone removal process, we speculate that the steady-state ozone removal efficiency is limited by reactant diffusion out of particles, and that regeneration is due to internal diffusion of reactive species to sites available to ozone for reaction. Finally, by applying our results to a screening model for typical residential and commercial buildings, HVAC filters were estimated to contribute 22% and 95%, respectively, of total ozone removal in HVAC systems.

P. Zhao; J.A. Siegel; R.L. Corsi

2007-01-01T23:59:59.000Z

376

Direct electrochemical reduction of metal-oxides  

DOE Patents [OSTI]

A method of controlling the direct electrolytic reduction of a metal oxide or mixtures of metal oxides to the corresponding metal or metals. A non-consumable anode and a cathode and a salt electrolyte with a first reference electrode near the non-consumable anode and a second reference electrode near the cathode are used. Oxygen gas is produced and removed from the cell. The anode potential is compared to the first reference electrode to prevent anode dissolution and gas evolution other than oxygen, and the cathode potential is compared to the second reference electrode to prevent production of reductant metal from ions in the electrolyte.

Redey, Laszlo I. (Downers Grove, IL); Gourishankar, Karthick (Downers Grove, IL)

2003-01-01T23:59:59.000Z

377

DOE Science Showcase - Rare Earth Metal Research from DOE Databases |  

Office of Scientific and Technical Information (OSTI)

Rare Earth Metal Research from DOE Databases Rare Earth Metal Research from DOE Databases Information Bridge Energy Citations Database Highlighted documents of Rare Earth Metal research in DOE databases Information Bridge - Corrosion-resistant metal surfaces DOE R&D Project Summaries - Structural and magnetic studies on heavy rare earth metals at high pressures using designer diamonds Energy Citations Database - Intermultiplet transitions in rare-earth metals DOE Green Energy - LaNi.sub.5 is-based metal hydride electrode in Ni-MH rechargeable cells Science.gov - H.R.4866 - Rare Earths Supply-Chain Technology and Resources Transformation Act of 2010 WorldWideScience.org - China produces most of the world's rare earth metals DOepatents - Recycling of rare earth metals from rare earth-transition metal alloy scrap by liquid metal extraction

378

Metal-doped organic foam  

DOE Patents [OSTI]

Organic foams having a low density and very small cell size and method for producing same in either a metal-loaded or unloaded (nonmetal loaded) form are described. Metal-doped foams are produced by soaking a polymer gel in an aqueous solution of desired metal salt, soaking the gel successively in a solvent series of decreasing polarity to remove water from the gel and replace it with a solvent of lower polarity with each successive solvent in the series being miscible with the solvents on each side and being saturated with the desired metal salt, and removing the last of the solvents from the gel to produce the desired metal-doped foam having desired density cell size, and metal loading. The unloaded or metal-doped foams can be utilized in a variety of applications requiring low density, small cell size foam. For example, rubidium-doped foam made in accordance with the invention has utility in special applications, such as in x-ray lasers.

Rinde, James A. (Livermore, CA)

1982-01-01T23:59:59.000Z

379

Removing Arsenic from Drinking Water  

ScienceCinema (OSTI)

See how INL scientists are using nanotechnology to remove arsenic from drinking water. For more INL research, visit http://www.facebook.com/idahonationallaboratory

None

2013-05-28T23:59:59.000Z

380

Removing Arsenic from Drinking Water  

SciTech Connect (OSTI)

See how INL scientists are using nanotechnology to remove arsenic from drinking water. For more INL research, visit http://www.facebook.com/idahonationallaboratory

None

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Liquid metal cooled nuclear reactor plant system  

DOE Patents [OSTI]

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting for fuel decay during reactor shutdown, or heat produced during a mishap. The reactor system is enhanced with sealing means for excluding external air from contact with the liquid metal coolant leaking from the reactor vessel during an accident. The invention also includes a silo structure which resists attack by leaking liquid metal coolant, and an added unique cooling means.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1993-01-01T23:59:59.000Z

382

Metal inks  

DOE Patents [OSTI]

Self-reducing metal inks and systems and methods for producing and using the same are disclosed. In an exemplary embodiment, a method may comprise selecting metal-organic (MO) precursor, selecting a reducing agent, and dissolving the MO precursor and the reducing agent in an organic solvent to produce a metal ink that remains in a liquid phase at room temperature. Metal inks, including self-reducing and fire-through metal inks, are also disclosed, as are various applications of the metal inks.

Ginley, David S; Curtis, Calvin J; Miedaner, Alex; van Hest, Marinus Franciscus Antonius Maria; Kaydanova, Tatiana

2014-02-04T23:59:59.000Z

383

3M heavy duty roto peen: Baseline report; Summary  

SciTech Connect (OSTI)

The roto peen scaler allows for the selective removal of concrete substrates. The peen is a tungsten carbide shot brazed to a hardened steel rivet that is supported by a heavy duty flexible flap. The peens are coupled with a commercially available piece of equipment that is used to scabble or remove the concrete. The scabbled debris is then collected into 55 gallon drums by means of a vacuum system. The safety and health evaluation during the human factors assessment focused on two main areas: noise and dust.

NONE

1997-07-31T23:59:59.000Z

384

High Metal Removal Rate Process for Machining Difficult Materials  

Broader source: Energy.gov (indexed) [DOE]

or otherwise restricted information. Project Objective Develop ultrafast laser and precise motion control technologies for micromachining difficult-to-machine...

385

Organoclay Sorbent for Removal of Carbon Dioxide from Gas Streams at Low Temperatures  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Organoclay Sorbent for Removal of Carbon Dioxide from Gas Organoclay Sorbent for Removal of Carbon Dioxide from Gas Streams at Low Temperatures Contact NETL Technology Transfer Group techtransfer@netl.doe.gov October 2012 Significance * Energy mixing is maximized * Mobilizing of the particulates is complete * No "dead zones" exist * Packing of material is minimized * Eroding effects are significantly reduced Applications * Mixing nuclear waste at Hanford * Any similar industrial process involving heavy solids in a carrier fluid Opportunity Research is currently active on the patent-pending technology "Organoclay Sorbent for Removal of Carbon Dioxide from

386

Metal Oxides  

Science Journals Connector (OSTI)

Metal oxides are the class of materials having the widest application in gas sensors. This chapter presents information related to the application of various metal oxides in gas sensors designed on different p...

Ghenadii Korotcenkov

2013-01-01T23:59:59.000Z

387

Cooling and solidification of heavy hydrocarbon liquid streams  

DOE Patents [OSTI]

A process and apparatus for cooling and solidifying a stream of heavy hydrocarbon material normally boiling above about 850.degree. F., such as vacuum bottoms material from a coal liquefaction process. The hydrocarbon stream is dropped into a liquid bath, preferably water, which contains a screw conveyor device and the stream is rapidly cooled, solidified and broken therein to form discrete elongated particles. The solid extrudates or prills are then dried separately to remove substantially all surface moisture, and passed to further usage.

Antieri, Salvatore J. (Trenton, NJ); Comolli, Alfred G. (Yardley, PA)

1983-01-01T23:59:59.000Z

388

Towards Heavy Fermions in Europium Intermetallic Compounds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Towards Heavy Fermions in Europium Intermetallic Compounds Print Towards Heavy Fermions in Europium Intermetallic Compounds Print For decades, intermetallic compounds of rare-earth metals have been favorite systems of the research community studying strong electron correlations in solids. Nowadays rare-earth intermetallics are often treated as model systems for studies of zero-temperature quantum critical phase transitions, since heavy-fermion rare-earth compounds (in which the electron effective mass is orders of magnitude larger than the bare electron mass) have provided the clearest evidence for these continuous phase transitions, which are controlled by such parameters as chemical composition, magnetic field, and pressure, rather than temperature. A new study of a europium-based compound by an international team led by researchers from the Technische Universität Dresden in Germany hints that this compound could join well-known compounds of cerium, ytterbium, and uranium as a new material suitable for research on quantum critical transitions. This finding is exciting, since physicists hope that the use of a new material will give an additional degree of freedom for researching quantum critical behavior.

389

Towards Heavy Fermions in Europium Intermetallic Compounds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Towards Heavy Fermions in Europium Intermetallic Compounds Print Towards Heavy Fermions in Europium Intermetallic Compounds Print For decades, intermetallic compounds of rare-earth metals have been favorite systems of the research community studying strong electron correlations in solids. Nowadays rare-earth intermetallics are often treated as model systems for studies of zero-temperature quantum critical phase transitions, since heavy-fermion rare-earth compounds (in which the electron effective mass is orders of magnitude larger than the bare electron mass) have provided the clearest evidence for these continuous phase transitions, which are controlled by such parameters as chemical composition, magnetic field, and pressure, rather than temperature. A new study of a europium-based compound by an international team led by researchers from the Technische Universität Dresden in Germany hints that this compound could join well-known compounds of cerium, ytterbium, and uranium as a new material suitable for research on quantum critical transitions. This finding is exciting, since physicists hope that the use of a new material will give an additional degree of freedom for researching quantum critical behavior.

390

Towards Heavy Fermions in Europium Intermetallic Compounds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Towards Heavy Fermions in Europium Intermetallic Compounds Print Towards Heavy Fermions in Europium Intermetallic Compounds Print For decades, intermetallic compounds of rare-earth metals have been favorite systems of the research community studying strong electron correlations in solids. Nowadays rare-earth intermetallics are often treated as model systems for studies of zero-temperature quantum critical phase transitions, since heavy-fermion rare-earth compounds (in which the electron effective mass is orders of magnitude larger than the bare electron mass) have provided the clearest evidence for these continuous phase transitions, which are controlled by such parameters as chemical composition, magnetic field, and pressure, rather than temperature. A new study of a europium-based compound by an international team led by researchers from the Technische Universität Dresden in Germany hints that this compound could join well-known compounds of cerium, ytterbium, and uranium as a new material suitable for research on quantum critical transitions. This finding is exciting, since physicists hope that the use of a new material will give an additional degree of freedom for researching quantum critical behavior.

391

Towards Heavy Fermions in Europium Intermetallic Compounds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Towards Heavy Fermions in Europium Intermetallic Compounds Print Towards Heavy Fermions in Europium Intermetallic Compounds Print For decades, intermetallic compounds of rare-earth metals have been favorite systems of the research community studying strong electron correlations in solids. Nowadays rare-earth intermetallics are often treated as model systems for studies of zero-temperature quantum critical phase transitions, since heavy-fermion rare-earth compounds (in which the electron effective mass is orders of magnitude larger than the bare electron mass) have provided the clearest evidence for these continuous phase transitions, which are controlled by such parameters as chemical composition, magnetic field, and pressure, rather than temperature. A new study of a europium-based compound by an international team led by researchers from the Technische Universität Dresden in Germany hints that this compound could join well-known compounds of cerium, ytterbium, and uranium as a new material suitable for research on quantum critical transitions. This finding is exciting, since physicists hope that the use of a new material will give an additional degree of freedom for researching quantum critical behavior.

392

Towards Heavy Fermions in Europium Intermetallic Compounds  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Towards Heavy Fermions in Europium Intermetallic Compounds Print Towards Heavy Fermions in Europium Intermetallic Compounds Print For decades, intermetallic compounds of rare-earth metals have been favorite systems of the research community studying strong electron correlations in solids. Nowadays rare-earth intermetallics are often treated as model systems for studies of zero-temperature quantum critical phase transitions, since heavy-fermion rare-earth compounds (in which the electron effective mass is orders of magnitude larger than the bare electron mass) have provided the clearest evidence for these continuous phase transitions, which are controlled by such parameters as chemical composition, magnetic field, and pressure, rather than temperature. A new study of a europium-based compound by an international team led by researchers from the Technische Universität Dresden in Germany hints that this compound could join well-known compounds of cerium, ytterbium, and uranium as a new material suitable for research on quantum critical transitions. This finding is exciting, since physicists hope that the use of a new material will give an additional degree of freedom for researching quantum critical behavior.

393

Silicone metalization  

DOE Patents [OSTI]

A system for providing metal features on silicone comprising providing a silicone layer on a matrix and providing a metal layer on the silicone layer. An electronic apparatus can be produced by the system. The electronic apparatus comprises a silicone body and metal features on the silicone body that provide an electronic device.

Maghribi, Mariam N. (Livermore, CA); Krulevitch, Peter (Pleasanton, CA); Hamilton, Julie (Tracy, CA)

2006-12-05T23:59:59.000Z

394

Coordination chemistry of two heavy metals: I, Ligand preferences in lead(II) complexation, toward the development of therapeutic agents for lead poisoning: II, Plutonium solubility and speciation relevant to the environment  

SciTech Connect (OSTI)

The coordination chemistry and solution behavior of the toxic ions lead(II) and plutonium(IV, V, VI) have been investigated. The ligand pK{sub a}s and ligand-lead(II) stability constants of one hydroxamic acid and four thiohydroaxamic acids were determined. Solution thermodynamic results indicate that thiohydroxamic acids are more acidic and slightly better lead chelators than hydroxamates, e.g., N-methylthioaceto-hydroxamic acid, pK{sub a} = 5.94, log{beta}{sub 120} = 10.92; acetohydroxamic acid, pK{sub a} = 9.34, log{beta}{sub l20} = 9.52. The syntheses of lead complexes of two bulky hydroxamate ligands are presented. The X-ray crystal structures show the lead hydroxamates are di-bridged dimers with irregular five-coordinate geometry about the metal atom and a stereochemically active lone pair of electrons. Molecular orbital calculations of a lead hydroxamate and a highly symmetric pseudo octahedral lead complex were performed. The thermodynamic stability of plutonium(IV) complexes of the siderophore, desferrioxamine B (DFO), and two octadentate derivatives of DFO were investigated using competition spectrophotometric titrations. The stability constant measured for the plutonium(IV) complex of DFO-methylterephthalamide is log{beta}{sub 110} = 41.7. The solubility limited speciation of {sup 242}Pu as a function of time in near neutral carbonate solution was measured. Individual solutions of plutonium in a single oxidation state were added to individual solutions at pH = 6.0, T = 30.0, 1.93 mM dissolved carbonate, and sampled over intervals up to 150 days. Plutonium solubility was measured, and speciation was investigated using laser photoacoustic spectroscopy and chemical methods.

Neu, M.P. [Lawrence Berkeley Lab., CA (United States)

1993-11-01T23:59:59.000Z

395

PHENIX recent heavy flavor results  

E-Print Network [OSTI]

Cold nuclear matter (CNM) effects provide an important baseline for the interpretation of data in heavy ion collisions. Such effects include nuclear shadowing, Cronin effect, and initial patron energy loss, and it is interesting to study the dependence on impact parameter and kinematic region. Heavy quark production is a good measurement to probe the CNM effects particularly on gluons, since heavy quarks are mainly produced via gluon fusions at RHIC energy. The PHENIX experiment has experiment has ability to study the CNM effects by measuring heavy quark production in $d$$+$Au collisions at variety of kinematic ranges. Comparisons of heavy quark production at different rapidities allow us to study modification of gluon density function in the Au nucleus depending on momentum fraction. Furthermore, comparisons to the results from heavy ion collisions (Au$+$Au and Cu$+$Cu) measured by PHENIX provide insight into the role of CNM effects in such collisions. Recent PHENIX results on heavy quark production are discussed.

Sanghoon Lim for the PHENIX collaboration

2014-02-28T23:59:59.000Z

396

Relativistic Heavy Ion Collider  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Relativistic Heavy Ion Collider Relativistic Heavy Ion Collider managed for the U.S. Department of Energy by Brookhaven Science Associates, founded by Stony Brook University and Battelle. managed for the U.S. Department of Energy by Brookhaven Science Associates, a company founded by Stony Brook University and Battelle 07/07 Brookhaven National Laboratory Funded by the U.S. Department of Energy, Brookhaven National Laboratory is a multipurpose research institution located on a 5,300-acre site on Long Island, New York. Six Nobel Prize-winning discoveries have been made at Brookhaven Lab. The Laboratory operates large-scale scientific facilities and performs research in physics, chemistry, biology, medicine, applied science, and

397

Characterizing Heavy Ion  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Heavy Ion Heavy Ion Reactions in the 1980's Is there Treasure at the end of the Rainbow? & What happens and how do different modes compete? John Schiffer One of the three research areas for ATLAS, as stated in a 1984 document to Congress: Are there some new marvelous symmetries, hidden in resonances in heavier nuclei, beyond 12 C+ 12 C and its immediate vicinity? (s.c. linac work, pre-ATLAS) Other attempts to chase the rainbow 180 o elastic scattering of 12 C on 40 Ca shows structure Fusion of 16 O on 40 Ca does not. In the end, it seemed that these structures were sometimes present in alpha-particle nuclei, but almost never in others. Some optimists, continued the pursuit. We also looked at the total fusion cross section in systems that showed resonances in scattering.

398

Detecting heavy quarks  

SciTech Connect (OSTI)

In this exercise we examine the performance of a detector specifically configured to tag heavy quark (HQ) jets through direct observations of D-meson decays with a high resolution vertex detector. To optimize the performance of such a detector, we assume the small diamond beam crossing configuration as described in the 1978 ISABELLE proposal, giving a luminosity of 10/sup 32/ cm/sup -2/ sec/sup -1/. Because of the very large backgrounds from light quark (LQ) jets, most triggering schemes at this luminosity require high P/sub perpendicular to/ leptons and inevitably give missing neutrinos. If alternative triggering schemes could be found, then one can hope to find and calculate the mass of objects decaying to heavy quarks. A scheme using the high resolution detector will also be discussed in detail. The study was carried out with events generated by the ISAJET Monte Carlo and a computer simulation of the described detector system. (WHK)

Benenson, G.; Chau, L.L.; Ludlam, T.; Paige, F.E.; Platner, E.D.; Protopopescu, S.D.; Rehak, P.

1983-01-01T23:59:59.000Z

399

Process for treating waste water having low concentrations of metallic contaminants  

DOE Patents [OSTI]

A process for treating waste water having a low level of metallic contaminants by reducing the toxicity level of metallic contaminants to an acceptable level and subsequently discharging the treated waste water into the environment without removing the treated contaminants.

Looney, Brian B; Millings, Margaret R; Nichols, Ralph L; Payne, William L

2014-12-16T23:59:59.000Z

400

Heavy Ions - Cyclotron  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Heavy Ions Heavy Ions Heavy ions used at the BASE Facility are accelerated in the form of "cocktails," named because of the fact that several heavy ions with the same mass-to-charge ratio are sent into the Cyclotron, which accelerates the ions while acting as a precision mass separator. The Control Room Operator then uses Cyclotron frequency to select only the desired ion, a process that takes about 2 minutes. We provide four standard cocktails: 4.5, 10, 16, and 30 MeV/nucleon. Depending on the cocktail, LETs from 1 to 100 MeV/(mg/cm^2) and flux levels of up to 1E7 ions/cm2-sec are available. Parts are tested in our vacuum chamber, and can be remotely positioned horizontally, vertically, or rotationally (y and z axes) with the motion table. An alignment laser is available to ensure the part is in the center of the beam. Mounting hardware is readily available. 12xBNC (F-F), 2x25-pin D (F-M or M-F), 4x40-pin flat ribbon (M-M), 4x50-pin flat ribbon (M-M), 12xSMA (F-F), and 2xEthernet vacuum feedthroughs are mounted upon request. (The 4x40-pin and 4x50-pin flat ribbon connectors are wired straight across, so you will need a F-F adapter to correct the pin numbers to normal.) Holes are provided through the cave shielding blocks for connecting additional test equipment, with a distance of approximately 10 feet from vacuum feedthrough to the top of the shielding block.

Note: This page contains sample records for the topic "heavy metals removal" 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

Utah Heavy Oil Program  

SciTech Connect (OSTI)

The Utah Heavy Oil Program (UHOP) was established in June 2006 to provide multidisciplinary research support to federal and state constituents for addressing the wide-ranging issues surrounding the creation of an industry for unconventional oil production in the United States. Additionally, UHOP was to serve as an on-going source of unbiased information to the nation surrounding technical, economic, legal and environmental aspects of developing heavy oil, oil sands, and oil shale resources. UHOP fulGilled its role by completing three tasks. First, in response to the Energy Policy Act of 2005 Section 369(p), UHOP published an update report to the 1987 technical and economic assessment of domestic heavy oil resources that was prepared by the Interstate Oil and Gas Compact Commission. The UHOP report, entitled 'A Technical, Economic, and Legal Assessment of North American Heavy Oil, Oil Sands, and Oil Shale Resources' was published in electronic and hard copy form in October 2007. Second, UHOP developed of a comprehensive, publicly accessible online repository of unconventional oil resources in North America based on the DSpace software platform. An interactive map was also developed as a source of geospatial information and as a means to interact with the repository from a geospatial setting. All documents uploaded to the repository are fully searchable by author, title, and keywords. Third, UHOP sponsored Give research projects related to unconventional fuels development. Two projects looked at issues associated with oil shale production, including oil shale pyrolysis kinetics, resource heterogeneity, and reservoir simulation. One project evaluated in situ production from Utah oil sands. Another project focused on water availability and produced water treatments. The last project considered commercial oil shale leasing from a policy, environmental, and economic perspective.

J. Bauman; S. Burian; M. Deo; E. Eddings; R. Gani; R. Goel; C.K. Huang; M. Hogue; R. Keiter; L. Li; J. Ruple; T. Ring; P. Rose; M. Skliar; P.J. Smith; J.P. Spinti; P. Tiwari; J. Wilkey; K. Uchitel

2009-10-20T23:59:59.000Z

402

A MATHEMATICAL EVOLUTION MODEL FOR PHYTOREMEDIATION OF METALS  

E-Print Network [OSTI]

polluted by heavy metals such as chromium. One of the new innovative methods of eradi- cating metals from prompted the need for new less expensive technologies. Remediation techniques have been based on either, the contaminant in the soil can be remediated to below a prescribed EPA target. Section 4 numerically simulates

Thomas, Diana

403

Constitutive Expression of a High-Affinity Sulfate Transporter in Indian Mustard Affects Metal Tolerance and Accumulation  

E-Print Network [OSTI]

of a gene that confers enhanced metal translocation or tolerance. TOXIC METALS and metalloids of heavy metals there is an increased demand for reduced S compounds like GSH and PCs, and genes involvedConstitutive Expression of a High-Affinity Sulfate Transporter in Indian Mustard Affects Metal

404

Sequestering agents for the removal of actinides from waste streams  

SciTech Connect (OSTI)

The ultimate goal of this project is to develop new separation technologies to remove radioactive metal ions from contaminated DOE sites. To this end we are studying both the fundamental chemistry and the extractant properties of some chelators that are either found in nature or are closely related to natural materials. The work is a collaboration betwen Lawrence Berkeley National Laboratory-University of California, Berkeley, and the Glenn T. Seaborg Institute for Transactinium Science at Lawrence Livermore National Laboratory.

Raymond, K.; White, D. [Univ. of California, Berkeley, CA (United States); Whisenhunt, D. [Lawrence Livermore National Lab., CA (United States)

1996-10-01T23:59:59.000Z

405

WCH Removes Massive Test Reactor  

Broader source: Energy.gov [DOE]

RICHLAND, WA -- Hanford's River Corridor contractor, Washington Closure Hanford, has met a significant cleanup challenge on the U.S. Department of Energy's (DOE) Hanford Site by removing a 1,082...

406

Evaluation of Technologies to Remove Suspended Solids from Waste Water  

SciTech Connect (OSTI)

The Effluent Treatment Facility (ETF) at the Savannah River Site utilizes pH adjustment, submicron filtration, Hg removal resin, activated carbon, reverse osmosis, cationic exchange, and evaporation to remove contaminants from radioactive waste water. After startup, the ETF had difficulty achieving design capacity. The primary problem was fouling of the ceramic microfilters. Typical filter flow rates were only 20 percent of design capacity.A research program was conducted to identify and evaluate technologies for improving suspended solids removal from radioactive wastewater at the Savannah River Site. Technolgies investigated were a ceramic microfilter, a tubular polymeric ultrafilter, two porous metal filters, a polymeric centrifugal ultrafilter, a deep bed filter, a backwashable cartridge filter, a fabric filter, and a centriguge.

Poirier, M.R.

1999-03-15T23:59:59.000Z

407

Removal of deposited copper from nuclear steam generators  

SciTech Connect (OSTI)

A review of the copper-removal process implemented during the cleaning of the NPD nuclear steam generator in Ontario revealed that major shortcomings in the process were depletion of the strong ammonia solution and relatively poor copper removal. Tests have shown that the concentration of the ammonia solution can be preserved close to its initial value, and high concentrations of complexed copper obtained, by sparging the ammonia solution with oxygen recirculating through a gas recirculation loop. Using recirculating oxygen for sparging at ambient air temperature, approximately 11 g/l of copper were dissolved by 100 g/l ammonia solution while the gaseous ammonia content of the recirculating gas remained well below the lower flammability limit. The corrosion rates of mild steel and commonly used nuclear steam generator tube materials in oxygenated ammonia solution were less than 30 mil/yr and no intergranular attack of samples was observed during tests. A second technique studied for the removal of copper is to ammoniate the spent iron-removal solvent to approximately pH 9.5 and sparge with recirculating oxygen. Complexed ferric iron in the spent iron-removal solvent was found to be the major oxidizing agent for metallic copper. The ferric iron can be derived from oxidation of dissolved ferrous iron to the ferric state or from dissolved oxides of iron directly. To extract copper from the secondary sides of nuclear steam generators, strong ammonia solution sparged with recirculating oxygen is recommended as the first stage, while ammoniated spent iron-removal solvent sparged with recirculating oxygen may be used to remove the copper freshly exposed during the removal of iron.

McSweeney, P.

1982-05-01T23:59:59.000Z

408

Heavy Vehicle Propulsion Materials: Recent Progress and Future Plans  

SciTech Connect (OSTI)

The Heavy Vehicle Propulsion Materials Program provides enabling materials technology for the U.S. DOE Office of Heavy Vehicle Technologies (OHVT). The technical agenda for the program is based on an industry assessment and the technology roadmap for the OHVT. A five-year program plan was published in 2000. Major efforts in the program are materials for diesel engine fuel systems, exhaust aftertreatment, and air handling. Additional efforts include diesel engine valve-train materials, structural components, and thermal management. Advanced materials, including high-temperature metal alloys, intermetallics, cermets, ceramics, amorphous materials, metal- and ceramic-matrix composites, and coatings, are investigated for critical engine applications. Selected technical issues and planned and ongoing projects as well as brief summaries of several technical highlights are given.

D. Ray Johnson; Sidney Diamond

2001-05-14T23:59:59.000Z

409

Defining the Proton Topology of the Zr6Based Metal-Organic Framework NU-1000  

E-Print Network [OSTI]

,16-19 heavy metal capture,20,21 sensing,12 ionic conductivity,22 toxic industrial chemical capture,23Defining the Proton Topology of the Zr6Based Metal-Organic Framework NU-1000 Nora Planas,, Joseph E of Science, King Abdulaziz University, Jeddah, Saudi Arabia *S Supporting Information ABSTRACT: Metal

410

Copper-induced oxidative stress in three-spined stickleback : relationship with hepatic metal levels  

E-Print Network [OSTI]

contamination of aquatic ecosystems by heavy metals. Among them, copper is a widespread pollutant found, 1999). Although this metal is a required element, high concentrations appear to be toxic to freshwater1 Copper-induced oxidative stress in three-spined stickleback : relationship with hepatic metal

Paris-Sud XI, Université de

411

Title of the article MODELLING OF METAL POLLUTANT LEACHING THROUGH A SMECTITE  

E-Print Network [OSTI]

, such as heavy metals, in soil constitutes a potential source of groundwater pollution. In the literature, some1 Title of the article MODELLING OF METAL POLLUTANT LEACHING THROUGH A SMECTITE Authors Chantal as the clay CEC. Keywords Leaching; metals; clay; copper; kinetic; modelling; CEC insu-00665250,version1-9May

Paris-Sud XI, Université de

412

Study of two sampling procedures for the valorization of metal hydroxide sludge as pollutant trapper  

E-Print Network [OSTI]

treatment, CrVI 1 Introduction Industrial aqueous pollution (heavy metals) accounts for 30 to 40% of all1 Study of two sampling procedures for the valorization of metal hydroxide sludge as pollutant@emse.fr Abstract: For the valorisation of metal hydroxide sludge as adsorbent of pollutant, it is necessary to make

Boyer, Edmond

413

Historical trends of metal pollution recorded in the sediments of the Culiacan River Estuary, Northwestern Mexico  

E-Print Network [OSTI]

Historical trends of metal pollution recorded in the sediments of the Culiacan River Estuary indicated a slight pollution by all the trace metals examined, although levels of enrichment for Ni and Pb) is strongly recommended. # 2002 Elsevier Science Ltd. All rights reserved. 1. Introduction Heavy metals

Long, Bernard

414

Electrochimica Acta 50 (2004) 205210 A direct analysis of nanomolar metal ions in environmental water  

E-Print Network [OSTI]

pollution is one of the most serious subjects since water is essential for the life. Especially heavy metalElectrochimica Acta 50 (2004) 205­210 A direct analysis of nanomolar metal ions in environmental Stripping Voltammetry (SWASV) was combined with microfabricated microelectrodes to analyze metal ions

Kwak, Juhyoun

415

INL '@work' heavy equipment mechanic  

ScienceCinema (OSTI)

INL's Cad Christensen is a heavy equipment mechanic. For more information about INL careers, visit http://www.facebook.com/idahonationallaboratory.

Christensen, Cad

2013-05-28T23:59:59.000Z

416

RHIC | Relativistic Heavy Ion Collider  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

breakthrough accelerator could collide electrons with heavy ions or protons at nearly the speed of light to create "snapshots" of the force binding all visible matter. Accelerator...

417

Creation and Testing of the ACES Heavy Heavy-Duty Diesel Engine...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Creation and Testing of the ACES Heavy Heavy-Duty Diesel Engine Test Schedule for Representative Measurement of Heavy-Duty Engine Emissions Creation and Testing of the ACES Heavy...

418

Recommendation 199: Recommendation to Remove Uncontaminated Areas...  

Office of Environmental Management (EM)

9: Recommendation to Remove Uncontaminated Areas of the Oak Ridge Reservation from the National Priorities List Recommendation 199: Recommendation to Remove Uncontaminated Areas of...

419

Rheological properties of heavy oils and heavy oil emulsions  

SciTech Connect (OSTI)

In this study, the author investigated the effects of a number of process variables such as shear rate, measurement temperature, pressure, the influence of pretreatment, and the role of various amounts of added water on the rheology of the resulting heavy oil or the emulsion. Rheological properties of heavy oils and the corresponding emulsions are important from transportation and processing standpoints.

Khan, M.R. [Texaco, Inc., Beacon, NY (United States). Fuels and Lubricants Technology Dept.

1996-06-01T23:59:59.000Z

420

Removing Stains from Washable Fabrics.  

E-Print Network [OSTI]

of May 8, 1914, as amended, and June 30, 1914, in cooperation with the United States Department of Agriculture. Zerle L. Carpenter, Director, Texas Agricultural Extension Service, The Texas A&M University System. lOM-1l-88, New CLO ...I UUL. Z TA24S.7 8873 NO.1616 B.1616 / Texas Agricultural Extension Service LIBRARY FEB 0 1 1989 Texas A&M University Removing Stains from Washable Fabrics Ann Vanderpoorten 8eard* Most spots and stains can be removed by prompt...

Beard, Ann Vanderpoorten

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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

Metal oxide films on metal  

DOE Patents [OSTI]

A structure including a thin film of a conductive alkaline earth metal oxide selected from the group consisting of strontium ruthenium trioxide, calcium ruthenium trioxide, barium ruthenium trioxide, lanthanum-strontium cobalt oxide or mixed alkaline earth ruthenium trioxides thereof upon a thin film of a noble metal such as platinum is provided.

Wu, Xin D. (Los Alamos, NM); Tiwari, Prabhat (Los Alamos, NM)

1995-01-01T23:59:59.000Z

422

Heavy oil transportation by pipeline  

SciTech Connect (OSTI)

Worldwide there are a number of pipelines used to transport heavy crude oils. The operations are facilitated in a variety of ways. For example, the Alyeska pipeline is an insulated pipeline transporting warm oil over 800 miles. This 48-inch line experiences limited heat loss due to the insulation, volume of oil contained, and heat gain due to friction and pumping. Some European trunk lines periodically handle heavy and waxy crudes. This is achieved by proper sizing of batches, following waxy crudes with non-waxy crudes, and increased use of scrapers. In a former Soviet republic, the transportation of heavy crude oil by pipeline has been facilitated by blending with a lighter Siberian crude. The paper describes the pipeline transport of heavy crudes by Interprovincial Pipe Line Inc. The paper describes enhancing heavy oil transportation by emulsion formation, droplet suspension, dilution, drag reducing agents, and heating.

Gerez, J.M.; Pick, A.R. [Interprovincial Pipe Line Inc., Edmonton, Alberta (Canada)

1996-12-31T23:59:59.000Z

423

Recovery Act Funds Test Reactor Dome Removal in Historic D&D Project |  

Broader source: Energy.gov (indexed) [DOE]

Recovery Act Funds Test Reactor Dome Removal in Historic D&D Recovery Act Funds Test Reactor Dome Removal in Historic D&D Project Recovery Act Funds Test Reactor Dome Removal in Historic D&D Project February 1, 2011 - 12:00pm Addthis Media Contacts Jim Giusti, DOE (803) 952-7697 james-r.giusti@srs.gov Paivi Nettamo, SRNS (803) 646-6075 paivi.nettamo@srs.gov AIKEN, S.C. - The landscape of the Savannah River Site (SRS) is a little flatter and a little less colorful with the removal today of the 75-foot-tall rusty-orange dome from the Cold War-era test reactor. This $25-million reactor decommissioning and deactivation project is funded By the American Recovery and Reinvestment Act. Affectionately known by SRS employees as "Hector," the iconic Heavy Water Components Test Reactor (HWCTR) has stood in the Site's B Area since 1959

424

Managing Inventories of Heavy Actinides  

SciTech Connect (OSTI)

The Department of Energy (DOE) has stored a limited inventory of heavy actinides contained in irradiated targets, some partially processed, at the Savannah River Site (SRS) and Oak Ridge National Laboratory (ORNL). The 'heavy actinides' of interest include plutonium, americium, and curium isotopes; specifically 242Pu and 244Pu, 243Am, and 244/246/248Cm. No alternate supplies of these heavy actinides and no other capabilities for producing them are currently available. Some of these heavy actinide materials are important for use as feedstock for producing heavy isotopes and elements needed for research and commercial application. The rare isotope 244Pu is valuable for research, environmental safeguards, and nuclear forensics. Because the production of these heavy actinides was made possible only by the enormous investment of time and money associated with defense production efforts, the remaining inventories of these rare nuclear materials are an important part of the legacy of the Nuclear Weapons Program. Significant unique heavy actinide inventories reside in irradiated Mark-18A and Mark-42 targets at SRS and ORNL, with no plans to separate and store the isotopes for future use. Although the costs of preserving these heavy actinide materials would be considerable, for all practical purposes they are irreplaceable. The effort required to reproduce these heavy actinides today would likely cost billions of dollars and encompass a series of irradiation and chemical separation cycles for at least 50 years; thus, reproduction is virtually impossible. DOE has a limited window of opportunity to recover and preserve these heavy actinides before they are disposed of as waste. A path forward is presented to recover and manage these irreplaceable National Asset materials for future use in research, nuclear forensics, and other potential applications.

Wham, Robert M [ORNL; Patton, Bradley D [ORNL

2011-01-01T23:59:59.000Z

425

Massive Hanford Test Reactor Removed - Plutonium Recycle Test...  

Office of Environmental Management (EM)

Massive Hanford Test Reactor Removed - Plutonium Recycle Test Reactor removed from Hanford's 300 Area Massive Hanford Test Reactor Removed - Plutonium Recycle Test Reactor removed...

426

heavy_oil | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Heavy Oil Publications KMD Contacts Project Summaries EPAct 2005 Arctic Energy Office Announcements Software Stripper Wells Heavy oil is a vast U.S. oil resource that is...

427

Theoretical Studies on Heavy Metal Sulfides in Solution  

SciTech Connect (OSTI)

'Calculating the stabilities, Raman and UV spectra and acidities of As sulfides in aqueous solution', J. A. Tossell, M. D. Zimmermann and G. R. Helz. Some of the Raman spectra obtained by reacting aqueous As(OH)3 with aqueous bisulfide are shown, taken from Wood, et al. (2002). To interpret these spectra we have carried out an extensive series of calculations, detailed for the case of AsS(SH){sub 2}{sup -} in Table 1 below. By employing state of the art quantum chemical techniques to determine gas-phase harmonic and anharmonic frequencies and solution phase corrections we can accurately match features in the experimental spectrum shown in the top figure. The AsS(SH){sub 2}{sup -}...22 H{sub 2}O nanocluster employed is shown in the lower figure. For this species we have calculated the equilibrium structure and the harmonic vibrational spectrum at the CBSB7 B3LYP level. For the free solute species AsS(SH){sub 2}{sup -} we have carried out a whole series of calculations, evaluating harmonic and anharmonic vibrational frequencies at a number of different quantum mechanical levels. In the spectra below, Fig. 3 and Fig. 5 from Wood, et al. (2002), the features around 700-800 cm{sup -1} are attributed to As-O stretches and those around 350-450 cm{sup -1} to As-S stretches. In the nanocluster an isolated vibrational feature is observed at 425 cm{sup -1}, an As=S stretch, close to the value (415 cm{sup -1}) determined by Wood, et al. (2002). Analysis of the calculated frequencies for AsS(SH){sub 2}{sup -} within a polarizable continuum model yields a similar result. Taking the highest level harmonic results, obtained from a CCSD calculation, and adding anharmonic and PCM corrections at the B3LYP level (designated (3) + (5) - (1) in Table 1) gives a frequency for the intense high frequency As=S stretch within 15 cm{sup -1} of experiment. Although there is still interesting work to be done on the stabilities and the Raman and UV spectra of As sulfides, most of the basic concepts have been worked out and we are therefore proposing to move to a new area, that of humic acids (while continuing our studies complexes formed by As oxides and sulfides, now applied to functional groups present in humic acids).

Tossell, John A.

2007-10-31T23:59:59.000Z

428

Pesticide and heavy metal residues in Louisiana river otter  

E-Print Network [OSTI]

chromatography. Hercury levels averaged 1. 29 porn in liver (N=100) and 3. 88 ppm in hair (N=24), Liver and hair mercury residues were highly correlated (r=0. 98). Fetal whole body mercury levels averaged 0. 07 ppm (N=4). Fetal and maternal mercury levels... correlations between ani- mal weights and residue levels were observed for mercury, dieldrin, and mirex. There were no apparent relationships between residue levels of mercury and liver weight or liver:carcass weight ratio. There was no significant...

Beck, Debra Lynn

2012-06-07T23:59:59.000Z

429

Coal burning leaves toxic heavy metal legacy in the Arctic  

Science Journals Connector (OSTI)

...Cap in northeastern Canada have been reported (8). Pb is the most extensively studied, with results reported from Camp Century in northwestern Greenland (12) and Summit in central Greenland (11, 1316). A total of 36 discrete ice core...

Joseph R. McConnell; Ross Edwards

2008-01-01T23:59:59.000Z

430

United abominations: Density functional studies of heavy metal chemistry  

SciTech Connect (OSTI)

Carbonyl and nitrile addition to uranyl (UO{sup 2}{sup 2+}) are studied. The competition between nitrile and water ligands in the formation of uranyl complexes is investigated. The possibility of hypercoordinated uranyl with acetone ligands is examined. Uranyl is studied with diactone alcohol ligands as a means to explain the apparent hypercoordinated uranyl. A discussion of the formation of mesityl oxide ligands is also included. A joint theory/experimental study of reactions of zwitterionic boratoiridium(I) complexes with oxazoline-based scorpionate ligands is reported. A computational study was done of the catalytic hydroamination/cyclization of aminoalkenes with zirconium-based catalysts. Techniques are surveyed for programming for graphical processing units (GPUs) using Fortran.

Schoendorff, George

2012-04-02T23:59:59.000Z

431

High-Level Treatment of Stormwater Heavy Metals  

E-Print Network [OSTI]

Capacities for Different Media CEC (meq/100 g) Peat Moss 22 Compost 19 Activated Carbon 5.4 Zeolite 6-Section The MCTT is comprised of three main sections: - an inlet having a conventional catchbasin with litter traps

Clark, Shirley E.

432

Heavy Metals in Glass Beads Used in Pavement Markings  

E-Print Network [OSTI]

Pavement markings are vital for safely navigating roadways. The nighttime visibility of pavement markings is enhanced by addition of retroreflective glass beads, most of which are made from recycled glass. Concern has been raised over the presence...

Mangalgiri, Kiranmayi

2012-07-16T23:59:59.000Z

433

Heavy-Electron Metals: New Highly Correlated States of Matter  

Science Journals Connector (OSTI)

...temperature T and (bottom) the inverse of the ultra-sonic attenuation coefficient a ver-sus...specific heat at low temperatures (T-~ 50 mK); the experimental results are in excellent...palladium for platinum reduces Tc to below 20 mK, and in general magnetic and nonmagnetic...

Z. FISK; D. W. HESS; C. J. PETHICK; D. PINES; J. L. SMITH; J. D. THOMPSON; J. O. WILLIS

1988-01-01T23:59:59.000Z

434

Metal Toxicity  

Science Journals Connector (OSTI)

Problems posed to plants by metal toxicity in the soils of the world are basically of two kinds. The first kind are of natural origin. These arise either as a consequence of the nature of the parent material f...

T. McNeilly

1994-01-01T23:59:59.000Z

435

Dendritic metal nanostructures  

DOE Patents [OSTI]

Dendritic metal nanostructures made using a surfactant structure template, a metal salt, and electron donor species.

Shelnutt, John A. (Tijeras, NM); Song, Yujiang (Albuquerque, NM); Pereira, Eulalia F. (Vila Nova de Gaia, PT); Medforth, Craig J. (Winters, CA)

2010-08-31T23:59:59.000Z

436

INTRODUCTION Metals comprise about 75% of the known elements and can  

E-Print Network [OSTI]

quality. Metals have traditionally been classified into categories such as light, heavy, semimetal (i of less than 0.1%. In biochemical and bio- medical research, trace element concentrations in plant

Sparks, Donald L.

437

Heavy ion fusion--Using heavy ions to make electricity  

E-Print Network [OSTI]

for a practical fusion power reactor. HIF is the only fusionenter the reactor chamber, and focus Heavy Ion Fusion ontoengineering test reactor. The promise of fusion as a power

Celata, C.M.

2004-01-01T23:59:59.000Z

438

Heavy Ion Collisions at RHIC  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

at Heavy Ion Colliders at Heavy Ion Colliders Theory Drivers & View from LHC Urs Achim Wiedemann CERN PH-TH NSAC Implementation Subcommittee Hearings 7 September 2012 Heavy Ion Physics - Main Tools of Theorists Understanding properties of hot and dense matter from the elementary interactions in QCD High Energy Physics String Theory Computational Physics Fluid Dynamics Dissipative fluid dynamic description * Based on: E-p conservation: 2 nd law of thermodynamics: * Sensitive to properties of matter that are calculated from first principles in quantum field theory - EOS: and sound velocity - transport coefficients: shear , bulk viscosity, conductivities ...

439

Experimental Study of In Situ Combustion with Tetralin and Metallic Catalysts  

E-Print Network [OSTI]

or metallic catalysts; the second run used heavy oil premixed with 3 wt% tetralin and 500ppm nickel catalyst; and the third run was with heavy oil premixed with 3 wt% tetralin and 500ppm iron catalyst. For the three runs, the cell production pressure was kept...

Palmer-Ikuku, Emuobonuvie

2010-01-16T23:59:59.000Z

440

Method for extracting copper, silver and related metals  

DOE Patents [OSTI]

A process for selectively extracting precious metals such as silver and gold concurrent with copper extraction from aqueous solutions containing the same. The process utilizes tetrathiamacrocycles and high molecular weight organic acids that exhibit a synergistic relationship when complexing with certain metal ions thereby removing them from ore leach solutions.

Moyer, B.A.; McDowell, W.J.

1987-10-23T23:59:59.000Z

Note: This page contains sample records for the topic "heavy metals removal" 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.


441

Removing Barriers to Interdisciplinary Research  

E-Print Network [OSTI]

A significant amount of high-impact contemporary scientific research occurs where biology, computer science, engineering and chemistry converge. Although programmes have been put in place to support such work, the complex dynamics of interdisciplinarity are still poorly understood. In this paper we interrogate the nature of interdisciplinary research and how we might measure its "success", identify potential barriers to its implementation, and suggest possible mechanisms for removing these impediments.

Naomi Jacobs; Martyn Amos

2010-12-19T23:59:59.000Z

442

Heavy vehicle propulsion system materials program semiannual progress report for April 1999 through September 1999  

SciTech Connect (OSTI)

The purpose of the Heavy Vehicle Propulsion System Materials Program is the development of materials: ceramics, intermetallics, metal alloys, and metal and ceramic coatings, to support the dieselization of class 1-3 trucks to realize a 35% fuel-economy improvement over current gasoline-fueled trucks and to support commercialization of fuel-flexible LE-55 low-emissions, high-efficiency diesel engines for class 7-8 trucks.

Johnson, D.R.

2000-01-01T23:59:59.000Z

443

Removal of arsenic compounds from spent catecholated polymer  

DOE Patents [OSTI]

Described is a process for removing arsenic from petroliferous derived liquids by contacting said liquid at an elevated temperature with a divinylbenzene-crosslinked polystyrene having catechol ligands anchored thereon. Also, described is a process for regenerating spent catecholated polystyrene by removal of the arsenic bound to it from contacting petroliferous liquid as described above and involves: a. treating said spent catecholated polystyrene, at a temperature in the range of about 20.degree. to 100.degree. C. with an aqueous solution of at least one carbonate and/or bicarbonate of ammonium, alkali and alkaline earth metals, said solution having a pH between about 8 and 10 and, b. separating the solids and liquids from each other. Preferably the regeneration treatment is in two steps wherein step (a) is carried out with an aqueous alcoholic carbonate solution containing lower alkyl alcohol, and, steps (a) and (b) are repeated using a bicarbonate.

Fish, Richard H. (Berkeley, CA)

1985-01-01T23:59:59.000Z

444

RHIC | Relativistic Heavy Ion Collider  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Relativistic Heavy Ion Collider Relativistic Heavy Ion Collider Photo of LINAC The Relativistic Heavy Ion Collider (RHIC) is a world-class particle accelerator at Brookhaven National Laboratory where physicists are exploring the most fundamental forces and properties of matter and the early universe. RHIC accelerates beams of particles (e.g., the nuclei of heavy atoms such as gold) to nearly the speed of light, and smashes them together to recreate a state of matter thought to have existed immediately after the Big Bang some 13.8 billion years ago. STAR and PHENIX, two large detectors located around the 2.4-mile-circumference accelerator, take "snapshots" of these collisions to reveal a glimpse of the basic constituents of visible matter, quarks and gluons. Understanding matter at

445

Heavy residue properties in intermediate energy nuclear collisions with gold  

SciTech Connect (OSTI)

We have measured the target fragment production cross sections and angular distributions for the interaction of 32, 44 and 93 MeV/nucleon argon, 35 and 43 MeV/nucleon krypton with gold. The fragment isobaric yield distributions, moving frame angular distributions and velocities have been deduced from these data. This fission cross section decreases with increasing projectile energy and the heavy residue cross section increases. The ratio v{sub {parallel}}/v{sub cn} increases approximately linearly with mass removed from the target. 21 refs., 8 figs.

Aleklett, K.; Sihver, L. (Uppsala Univ., Nykoeping (Sweden). Studsvik Neutron Research Lab.); Loveland, W. (Oregon State Univ., Corvallis, OR (USA)); Liljenzin, J.O. (Chalmers Univ. of Tech., Goeteborg (Sweden)); Seaborg, G.T. (Lawrence Berkeley Lab., CA (USA). Nuclear Science Div.)

1990-10-01T23:59:59.000Z

446

LCLS Heavy Met Outgassing Tests  

SciTech Connect (OSTI)

A Heavy Met that is 95% tungsten, 3% nickel and 2% iron and sintered to 100% density and is Ultra High Vacuum (UHV) compatible is proposed for use as the X-ray slit in the Front End Enclosure and the Fixed Mask for the Linac Coherent Light Source (LCLS). The Heavy Met was tested in the LLNL Vacuum Sciences and Engineering Lab (VSEL) to determine its outgassing rate and its overall compatibility with the vacuum requirements for LCLS.

Kishiyama, K. I.

2010-12-01T23:59:59.000Z

447

Single-step multiplex detection of toxic metal ions by Au nanowires-on-chip sensor using reporter elimination  

E-Print Network [OSTI]

Single-step multiplex detection of toxic metal ions by Au nanowires-on-chip sensor using reporter sensitively detect multiple toxic metal ions. Most importantly, the reporter elimination method simplified by using this sensor. 1. Introduction Heavy metal ions such as mercury (Hg2+ ), silver (Ag+ ), and lead (Pb

Kim, Bongsoo

448

Suppression of Metallic Impurities by Electron Injection in a Tokamak  

Science Journals Connector (OSTI)

We found that the sheath potential plays a dominant role in the plasma-wall interaction in the Macrotor tokamak. An increase in the sheath potential, produced by removing electrons from the plasma, results in the enhancement of the metal influx. When the sheath potential is reduced by electron injection, the metal influx is suppressed. This mechanism may be used as a tool in controlling metallic impurities in tokamaks.

R. J. Taylor and Lena Oren

1979-02-12T23:59:59.000Z

449

Heavy oil reservoirs recoverable by thermal technology. Annual report  

SciTech Connect (OSTI)

This volume contains reservoir, production, and project data for target reservoirs which contain heavy oil in the 8 to 25/sup 0/ API gravity range and are susceptible to recovery by in situ combustion and steam drive. The reservoirs for steam recovery are less than 2500 feet deep to comply with state-of-the-art technology. In cases where one reservoir would be a target for in situ combustion or steam drive, that reservoir is reported in both sections. Data were collectd from three source types: hands-on (A), once-removed (B), and twice-removed (C). In all cases, data were sought depicting and characterizing individual reservoirs as opposed to data covering an entire field with more than one producing interval or reservoir. The data sources are listed at the end of each case. This volume also contains a complete listing of operators and projects, as well as a bibliography of source material.

Kujawa, P.

1981-02-01T23:59:59.000Z

450

Heavy oil reservoirs recoverable by thermal technology. Annual report  

SciTech Connect (OSTI)

This volume contains reservoir, production, and project data for target reservoirs thermally recoverable by steam drive which are equal to or greater than 2500 feet deep and contain heavy oil in the 8 to 25/sup 0/ API gravity range. Data were collected from three source types: hands-on (A), once-removed (B), and twice-removed (C). In all cases, data were sought depicting and characterizing individual reservoirs as opposed to data covering an entire field with more than one producing interval or reservoir. The data sources are listed at the end of each case. This volume also contains a complete listing of operators and projects, as well as a bibliography of source material.

Kujawa, P.

1981-02-01T23:59:59.000Z

451

Method for removing cesium from a nuclear reactor coolant  

DOE Patents [OSTI]

A method of and system for removing cesium from a liquid metal reactor coolant including a carbon packing trap in the primary coolant system for absorbing a major portion of the radioactive cesium from the coolant flowing therethrough at a reduced temperature. A regeneration subloop system having a secondary carbon packing trap is selectively connected to the primary system for isolating the main trap therefrom and connecting it to the regeneration system. Increasing the temperature of the sodium flowing through the primary trap diffuses a portion of the cesium

Colburn, Richard P. (Pasco, WA)

1986-01-01T23:59:59.000Z

452

Libya HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Libya HEU Removal Libya HEU Removal Location Libya United States 27 34' 9.5448" N, 17 24' 8.4384" E See map: Google Maps Javascript is required to view this map....

453

Canada HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Canada HEU Removal Canada HEU Removal Location Canada United States 53 47' 24.972" N, 104 35' 23.4384" W See map: Google Maps Javascript is required to view this map....

454

Israel HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Israel HEU Removal Israel HEU Removal Location Israel United States 30 53' 18.2328" N, 34 52' 14.178" E See map: Google Maps Javascript is required to view this map....

455

Uzbekistan HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Uzbekistan HEU Removal Uzbekistan HEU Removal Location Uzbekistan United States 42 6' 56.196" N, 63 22' 8.9076" E See map: Google Maps Javascript is required to view this map...

456

France HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Four-Year Plan France HEU Removal France HEU Removal Location United States 45 44' 20.0544" N, 2 17' 6.5616" E See map: Google Maps Javascript is required to view this map...

457

Chile HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Four-Year Plan Chile HEU Removal Chile HEU Removal Location United States 25 28' 1.4916" S, 69 33' 55.548" W See map: Google Maps Javascript is required to view this map...

458

Taiwan HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Taiwan HEU Removal Taiwan HEU Removal Location Taiwan United States 24 35' 37.4964" N, 120 53' 36.798" E See map: Google Maps Javascript is required to view this map....

459

Romania HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Romania HEU Removal Romania HEU Removal Location Romania United States 45 47' 1.932" N, 24 41' 50.1576" E See map: Google Maps Javascript is required to view this map....

460

Serbia HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Serbia HEU Removal Serbia HEU Removal Location Serbia United States 44 22' 45.7068" N, 20 26' 4.452" E See map: Google Maps Javascript is required to view this map....

Note: This page contains sample records for the topic "heavy metals removal" 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.


461

Poland HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Poland HEU Removal Poland HEU Removal Location Poland United States 53 23' 50.2872" N, 17 50' 30.4692" E See map: Google Maps Javascript is required to view this map....

462

Vietnam HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Plan Vietnam HEU Removal Vietnam HEU Removal Location Vietnam United States 13 12' 30.8628" N, 108 19' 30.702" E See map: Google Maps Javascript is required to view this map....

463

Ukraine HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Apply for Our Jobs Our Jobs Working at NNSA Blog Home content Four-Year Plan Ukraine HEU Removal Ukraine HEU Removal Location Ukraine United States 50 12' 24.8688" N,...

464

Japan HEU Removal | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Jobs Apply for Our Jobs Our Jobs Working at NNSA Blog Home content Four-Year Plan Japan HEU Removal Japan HEU Removal Location Japan United States 37 36' 59.5872" N, 140...

465

Remove Condensate with Minimal Air Loss  

Broader source: Energy.gov [DOE]

This tip sheet outlines several condensate removal methods as part of maintaining compressed air system air quality.

466

Laser-based coatings removal  

SciTech Connect (OSTI)

Over the years as building and equipment surfaces became contaminated with low levels of uranium or plutonium dust, coats of paint were applied to stabilize the contaminants in place. Most of the earlier paint used was lead-based paint. More recently, various non-lead-based paints, such as two-part epoxy, are used. For D & D (decontamination and decommissioning), it is desirable to remove the paints or other coatings rather than having to tear down and dispose of the entire building.

Freiwald, J.G.; Freiwald, D.

1995-12-01T23:59:59.000Z

467

Composite metal membrane  

DOE Patents [OSTI]

A composite metal membrane including a first metal layer of Group IVB met or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof is provided together with a process for the recovery of hydrogen from a gaseous mixture including contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite metal membrane including a first metal of Group IVB metals or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof, and, separating hydrogen from a second side of the nonporous composite metal membrane.

Peachey, Nathaniel M. (Espanola, NM); Dye, Robert C. (Los Alamos, NM); Snow, Ronny C. (Los Alamos, NM); Birdsell, Stephan A. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

468

Composite metal membrane  

DOE Patents [OSTI]

A composite metal membrane including a first metal layer of Group IVB met or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof is provided together with a process for the recovery of hydrogen from a gaseous mixture including contacting a hydrogen-containing gaseous mixture with a first side of a nonporous composite metal membrane including a first metal of Group IVB metals or Group VB metals, the first metal layer sandwiched between two layers of an oriented metal of palladium, platinum or alloys thereof, and, separating hydrogen from a second side of the nonporous composite metal membrane.

Peachey, N.M.; Dye, R.C.; Snow, R.C.; Birdsell, S.A.

1998-04-14T23:59:59.000Z

469

Process for converting heavy oil deposited on coal to distillable oil in a low severity process  

DOE Patents [OSTI]

A process for removing oil from coal fines that have been agglomerated or blended with heavy oil comprises the steps of heating the coal fines to temperatures over 350.degree. C. up to 450.degree. C. in an inert atmosphere, such as steam or nitrogen, to convert some of the heavy oil to lighter, and distilling and collecting the lighter oils. The pressure at which the process is carried out can be from atmospheric to 100 atmospheres. A hydrogen donor can be added to the oil prior to deposition on the coal surface to increase the yield of distillable oil.

Ignasiak, Teresa (417 Heffernan Drive, Edmonton, Alberta, CA); Strausz, Otto (13119 Grand View Drive, Edmonton, Alberta, CA); Ignasiak, Boleslaw (417 heffernan Drive, Edmonton, Alberta, CA); Janiak, Jerzy (17820 - 76 Ave., Edmonton, Alberta, CA); Pawlak, Wanda (3046 - 11465 - 41 Avenue, Edmonton, Alberta, CA); Szymocha, Kazimierz (3125 - 109 Street, Edmonton, Alberta, CA); Turak, Ali A. (Edmonton, CA)

1994-01-01T23:59:59.000Z

470

Method of making thermally removable epoxies  

DOE Patents [OSTI]

A method of making a thermally-removable epoxy by mixing a bis(maleimide) compound to a monomeric furan compound containing an oxirane group to form a di-epoxy mixture and then adding a curing agent at temperatures from approximately room temperature to less than approximately 90.degree. C. to form a thermally-removable epoxy. The thermally-removable epoxy can be easily removed within approximately an hour by heating to temperatures greater than approximately 90.degree. C. in a polar solvent. The epoxy material can be used in protecting electronic components that may require subsequent removal of the solid material for component repair, modification or quality control.

Loy, Douglas A. (Albuquerque, NM); Wheeler, David R. (Albuquerque, NM); Russick, Edward M. (Rio Rancho, NM); McElhanon, James R. (Albuquerque, NM); Saunders, Randall S. (late of Albuquerque, NM)

2002-01-01T23:59:59.000Z

471

Method for extracting metals from aqueous waste streams for long term storage  

DOE Patents [OSTI]

A liquid--liquid extraction method for removing metals and hydrous metal colloids from waste streams is provided wherein said waste streams are contacted with a solvent system containing a water-in-oil microemulsion wherein the inverted micelles contain the extracted metal. A silicon alkoxide, either alone or in combination with other metal alkoxide compounds is added to the water-in-oil microemulsion, thereby allowing encapsulation of the extracted metal within a silicon oxide network. Lastly, the now-encapsulated metal is precipitated from the water-in-oil microemulsion phase to yield aggregates of metal-silicate particles having average individual particle sizes of approximately 40 nanometers.

Chaiko, David J. (Woodridge, IL)

1995-01-01T23:59:59.000Z

472

Method for extracting metals from aqueous waste streams for long term storage  

DOE Patents [OSTI]

A liquid-liquid extraction method for removing metals and hydrous metal colloids from waste streams is provided wherein said waste streams are contacted with a solvent system containing a water-in-oil microemulsion wherein the inverted micelles contain the extracted metal. A silicon alkoxide, either alone or in combination with other metal alkoxide compounds is added to the water-in-oil microemulsion, thereby allowing encapsulation of the extracted metal within a silicon oxide network. Lastly, the now-encapsulated metal is precipitated from the water-in-oil microemulsion phase to yield aggregates of metal-silicate particles having average. individual particle sizes of approximately 40 manometers.

Chaiko, D.J.

1993-01-01T23:59:59.000Z

473

RHIC | Relativistic Heavy Ion Collider  

Broader source: All U.S. Department of Energy (DOE) Office Webpages

Brookhaven National Laboratory Brookhaven National Laboratory search U.S. Department of Energy logo Home RHIC Science News Images Videos For Scientists Björn Schenke 490th Brookhaven Lecture, 12/18 Join Björn Schenke of Brookhaven Lab's Physics Department for the 490th Brookhaven Lecture, titled 'The Shape and Flow of Heavy Ion Collisions,' on Wednesday, Dec. 18, at 4 p.m. in Berkner Hall. droplets Tiny Drops of Hot Quark Soup-How Small Can They Be? New analyses indicate that collisions of small particles with large gold nuclei at the Relativistic Heavy Ion Collider may be serving up miniscule servings of hot quark-gluon plasma. RHIC Physics RHIC is the first machine in the world capable of colliding ions as heavy as gold. The Spin Puzzle RHIC is the world's only machine capable of colliding beams of polarized

474

CMVRTC: Heavy Truck Duty Cycle  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

heavy truck duty cycle (HTDC) project heavy truck duty cycle (HTDC) project OVERVIEW The Heavy Truck Duty Cycle (HTDC) Project was initiated in 2004 and is sponsored by the US Department of Energy's (DOE's) Office of FreedomCar and Vehicle Technologies Program. ORNL designed the research program to generate real-world-based duty cycle data from trucks operating in long-haul operations and was designed to be conducted in three phases: identification of parameters to be collected, instrumentation and pilot testing, identification of a real-world fleet, design of the data collection suite and fleet instrumentation, and data collection, analysis, and development of a duty cycle generation tool (DCGT). ANL logo dana logo michelin logo Schrader logo This type of data will be useful for supporting energy efficiency

475

Elliptic flow of heavy flavors  

E-Print Network [OSTI]

The propagation of charm and bottom quarks through a ellipsoidal domain of quark gluon plasma has been studied within the ambit of non-equilibrium statistical mechanics. Energy dissipation of heavy quarks by both radiative and collisional processes are taken in to account. The experimental data on the elliptic flow of the non-photonic electrons resulting from the semi-leptonic decays of hadrons containing heavy flavours has been reproduced with the same formalism that has been used earlier to reproduce the nuclear suppression factors. The elliptic flow of the non-photonic electron from heavy meson decays produced in nuclear collisions at LHC and low energy RHIC run have also been predicted.

Das, Santosh K

2010-01-01T23:59:59.000Z

476

Elliptic flow of heavy flavors  

E-Print Network [OSTI]

The propagation of charm and bottom quarks through an ellipsoidal domain of quark gluon plasma has been studied within the ambit of non-equilibrium statistical mechanics. Energy dissipation of heavy quarks by both radiative and collisional processes are taken in to account. The experimental data on the elliptic flow of the non-photonic electrons resulting from the semi-leptonic decays of hadrons containing heavy flavours has been reproduced with the same formalism that has been used earlier to reproduce the nuclear suppression factors. The elliptic flow of the non-photonic electron from heavy meson decays produced in nuclear collisions at LHC and low energy RHIC run have also been predicted.

Santosh K Das; Jan-e Alam

2010-08-16T23:59:59.000Z

477

Heavy-duty fleet test evaluation of recycled engine coolant  

SciTech Connect (OSTI)

A 240,000 mile (386,232 km) fleet test was conducted to evaluate recycled engine coolant against factory fill coolant. The fleet consisted of 12 new Navistar International Model 9600 trucks equipped with Detroit Diesel Series 60 engines. Six of the trucks were drained and filled with the recycled engine coolant that had been recycled by a chemical treatment/filtration/reinhibited process. The other six test trucks contained the factory filled coolant. All the trucks followed the same maintenance practices which included the use of supplemental coolant additives. The trucks were equipped with metal specimen bundles. Metal specimen bundles and coolant samples were periodically removed to monitor the cooling system chemistry. A comparison of the solution chemistry and metal coupon corrosion patterns for the recycled and factory filled coolants is presented and discussed.

Woyciesjes, P.M.; Frost, R.A. [Prestone Products Corp., Danbury, CT (United States). Coolant Group

1999-08-01T23:59:59.000Z

478

Nitrogen removal from natural gas  

SciTech Connect (OSTI)

According to a 1991 Energy Information Administration estimate, U.S. reserves of natural gas are about 165 trillion cubic feet (TCF). To meet the long-term demand for natural gas, new gas fields from these reserves will have to be developed. Gas Research Institute studies reveal that 14% (or about 19 TCF) of known reserves in the United States are subquality due to high nitrogen content. Nitrogen-contaminated natural gas has a low Btu value and must be upgraded by removing the nitrogen. In response to the problem, the Department of Energy is seeking innovative, efficient nitrogen-removal methods. Membrane processes have been considered for natural gas denitrogenation. The challenge, not yet overcome, is to develop membranes with the required nitrogen/methane separation characteristics. Our calculations show that a methane-permeable membrane with a methane/nitrogen selectivity of 4 to 6 would make denitrogenation by a membrane process viable. The objective of Phase I of this project was to show that membranes with this target selectivity can be developed, and that the economics of the process based on these membranes would be competitive. Gas permeation measurements with membranes prepared from two rubbery polymers and a superglassy polymer showed that two of these materials had the target selectivity of 4 to 6 when operated at temperatures below - 20{degrees}C. An economic analysis showed that a process based on these membranes is competitive with other technologies for small streams containing less than 10% nitrogen. Hybrid designs combining membranes with other technologies are suitable for high-flow, higher-nitrogen-content streams.

NONE

1997-04-01T23:59:59.000Z

479

Heavy oil fraction removal from sand using hydrotropes containing oil-in-water microemulsions  

Science Journals Connector (OSTI)

Oil-in-water microemulsions were prepared with a nonionic surfactant and different cosurfactants using as the oil phase a hydrocarbon mixture of linear, cyclic and aromatic hydrocarbons. This organic mixture e...

M. C. K. Oliveira; E. F. Lucas; G. Gonzlez; J. F. Oliveira

2004-01-01T23:59:59.000Z

480

Pionic Fusion of Heavy Ions  

Science Journals Connector (OSTI)

We report the first experimental observation of the pionic fusion of two heavy ions. The 12C(12C,24Mg)?0 and 12C(12C,24Na)?+ cross sections have been measured to be 20838 and 18284 pb, respectively, at Ecm=137MeV. This cross section for heavy-ion pion production, at an energy just 6 MeV above the absolute energy-conservation limit, constrains possible production mechanisms to incorporate the kinetic energy of the entire projectile-target system as well as the binding energy gained in fusion.

D. Horn; G. C. Ball; D. R. Bowman; W. G. Davies; D. Fox; A. Galindo-Uribarri; A. C. Hayes; G. Savard; L. Beaulieu; Y. Larochelle; C. St-Pierre

1996-09-16T23:59:59.000Z

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