In-situ biotransformation of carbon tetrachloride under anoxic conditions



Publisher: Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, [1991] in Ada, Okla

Written in English
Published: Pages: 95 Downloads: 472
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Subjects:

  • Pollutants -- Structure-activity relationships.,
  • Organic water pollutants -- Biodegradation.,
  • Leachate -- Mathematical models.

Edition Notes

Other titlesIn situ biotransformations of carbon tetrachloride under anoxic conditions.
Statementby Lewis Semprini ... [et al.].
ContributionsSemprini, Lewis., Robert S. Kerr Environmental Research Laboratory., United States. Environmental Protection Agency., Stanford University.
The Physical Object
Paginationx, 95 p. :
Number of Pages95
ID Numbers
Open LibraryOL18064384M

Interactions between sorption and biodegradation: Exploring bioavailability and pulsed nutrient injection efficiency We consider case studies involving the biodegradation of carbon tetrachloride (CT) as well as a chemically induced degradation system to evaluate the tions and the conditions under which the predicted mass. Bouskill, NJ, TE Wood, R Baran, Z Ye, BP Bowen, H-C Lim, J Zhou, JD Van Nostrand, P Nico, TR Northen, WL Silver, and EL Brodie. Belowground response to drought in a tropical forest soil. I. Changes in microbial functional potential and metabolism (pdf). Perry McCarty is part of Stanford Profiles, official site for faculty, postdocs, students and staff information (Expertise, Bio, Research, Publications, and more). The site facilitates research and collaboration in academic endeavors. new methods of sodium persulfate reagent activation have been developed and these systems have shown promise for improved treatment performance. The new methods of persulfate activation use chelated metals, such as iron (II) ethylenediamine tetraacetic acid [Fe+2(EDTA)], hydrogen peroxide addition or alkaline conditions by addition of base.

Many studies have examined the differences in bacterial numbers, composition, and activity between groundwater and sediment samples. The majority of the literature has suggested higher percentages of attached bacteria than of unattached bacteria in aquifer systems, including in pristine aquifers and in aquifers contaminated with petroleum, creosote, sewage, and landfill Cited by: Quantifying in situ transformation rates of chlorinated Column studies of biodegradation of mixtures of tetrachloroethene and carbon tetrachloride. Water Back diffusion of chlorinated solvent contaminants from a natural aquitard to a remediated aquifer under well‐ controlled field conditions: Predictions and measurements. Life and element cycling on Earth is directly related to electron transfer (or redox) reactions. An understanding of biogeochemical redox processes is crucial for predicting and protecting environmental health and can provide new opportunities for engineered remediation strategies. Energy can be released and stored by means of redox reactions via the oxidation of labile Cited by: *Vogel TM, McCarty PL. Biotransformation of tetrachloroethylene to trichloroethylene, dichloroethylene, vinyl chloride, and carbon dioxide under methanogenic conditions. Appl Environ Microbial 49(5) *Wallace LA. Comparison of risks from outdoor and indoor exposure to toxic chemicals. Environ Health Perspect

  Len1, in his book "Small-Scale Synthesis of Laboratory Reagents," shows how he converted chloroform to carbon tetrachloride in near quantitative yield using free radical chlorination. This post will document my efforts to do the same using a scaled down version of Len's method. Len used a charge of g of chloroform and a 1kW mercury vapor lamp. The carbon tetrachloride levels in blood declined with a half-life of 4 to 5 h during the first 24 h after oral administration of ml carbon tetrachloride/kg body weight (Larson & Plaa, ) or 2 ml ( mCi) [14 C]carbon tetrachloride/kg body weight (Marchand et al., ). Carbon tetrachloride levels in the liver declined with a half. Field and Laboratory Evidence of In Situ Biotransformation of Tetrachloroethene to Ethene and Ethane at a Chemical Transfer Facility in North Toronto, (). Major, D.W., E.H. Hodgins, and B.J. Butler, R. Hinchee and R. Olfenbuttel. In Situ and On-Site Bioreclamation; Buttersworth-Heineman, Stoneham, Massachusetts. Development of a two ‐ color fluorescence in situ hybridization technique for species ‐ level Biotransformation of arsenic species by activated sludge and removal of bio The mechanism of stabilization of actinomycete foams and the prevention of foaming under laboratory conditions. J. Ind. Microbiol. 4: –

In-situ biotransformation of carbon tetrachloride under anoxic conditions Download PDF EPUB FB2

EPA// January IN-SITU BIOTRANSFORMATION OF CARBON TETRACHLORIDE UNDER ANOXIC CONDITIONS by Lewis Semprini, Gary D. Hopkins, Dick B. Janssen, Margaret Lang, Paul V. Roberts, and Perry L. McCarty Department of Civil Engineering Stanford University Stanford, California Cooperative Agreement EPA CR.

The complete report, entitled "In-Situ Biotransformation of Carbon Tetrachloride Under Anoxic Conditions," (Order No. PB /AS; Cost: $, subject to change) will be available only from: National Technical Information Service Port Royal Road Springfield, VA Telephone: The EPA Project Officer can be contacted at.

In-situ biotransformation of carbon tetrachloride under anoxic conditions. Ada, Okla.: Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, []. Get this from a library. In-situ biotransformation of carbon tetrachloride under anoxic conditions.

[Lewis Semprini; Robert S. Kerr Environmental Research Laboratory.;]. Reference Type Citation Progress Report Year Document Sources ; Book Chapter: Semprini L, Hopkins GD, Roberts PV, McCarty PL.

In situ biotransformation of carbon tetrachloride, FreonFr and 1,1,1-TCA under Anoxic Conditions. RC System Design for Enhanced In-Situ Biotransformation of Carbon Tetrachloride: Application to DOE's Arid Site Integrated Demonstration RC Modeling Strategies for Optimizing In-Situ Bioremediation RC Anaerobic Treatment of Chlorinated Solvent Contaminated Groundwater RC In Situ Treatment of Chlorinated Solvents.

Column Studies of Anaerobic Carbon Tetrachloride Biotransformation with Hanford Aquifer Material Article in Ground Water Monitoring and Remediation 25(3) - 92. Anaerobic biotransformation of carbon tetrachloride under various electron acceptor conditions Article in Bioresource Technology 84(1) September with Author: Raj Boopathy.

The biotransformation of carbon tetrachloride (CT) under various electron acceptor conditions was investigated using enrichment cultures developed from the anaerobic digester sludge of Thibodaux sewage treatment plant.

The results indicated that CT was biotransformed under sulfate-reducing, methanogenic, nitrate-reducing, iron-reducing Cited by: The biotransformabilities of 1,1,1-trichloroethane (TCA) and carbon tetrachloride (CT) were investigated at 35°C under low concentration of acetic acid as the auxiliary substrate to evaluate the concentration effect of the auxiliary substrate on Cited by: In-situ biotransformation of carbon tetrachloride under anoxic conditions.

Ada, OK: U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory. In Situ Bioremediation for the Hanford Carbon Tetrachloride Plume (ISB), which is the term used in this report for an in situ treatment process using indigenous micro-organisms with a computer based Accelerated Bioremediation Design Tool (ABDT), File Size: KB.

Biodegradation of Carbon Tetrachloride under Anoxic Conditions. Comparative Efficiency of Microbial Systems for Destroying Carbon Tetrachloride Contamination in Hanford Groundwater.

Anaerobic Biotransformation and Transport of Chlorinated Hydrocarbons in Groundwater. In-Situ Biotransformation of Carbon Tetrachloride Under Anoxic Conditions, EPA// Semprini, Lewis, Paul V.

Roberts, Gary D. Hopkins, and Perry L. McCarty, September/October " A Field Evaluation of In-Situ Biodegradation of Chlorinated Ethenes: Part 2, Results of Biostimulation and Biotransformation Experiments," Ground Water, Vol.

In situ bioremediation of carbon tetrachloride. presents the two most viable anaerobic pathways for biodegradation. One pathway is reductive dechlorination and the other is cometabolic.

The cometabolic pathway may occur either through reductive dechlorination or Size: KB. The dechlorination of carbon tetrachloride (CCl4) by free-living and attached bacteria under anaerobic conditions was studied to examine the relationship between porous media and electron donor.

Two batch-type experiments, the free-living and attached bacterial systems, were conducted with and without addition of mm glass beads. Glucose and Cited by: Book Description. This timely reference presents the state of the art of the emerging and rapidly changing field of bioremediation of chlorinated solvents, PCBs, and other chlorinated compounds, as well as PAHs, both in situ and on site.

Biodegradation of Carbon Tetrachloride under Anoxic Conditions. Comparative Efficiency of Microbial. Biological and Chemical Transformations of Halogenated Aliphatic Compounds in Aquatic and Terrestrial Environments Semprini, L., G.D. Hopkins, P.V.

Roberts, and P.L. McCarty. In-situ biotransformation of carbon tetrachloride, 1,1,1-trichloroethane, freon, and freon under anoxic conditions. In-situ Transformation of Carbon Cited by: Enhanced in-situ bioremediation of chlorinated aliphatic compounds Physical, chemical, and biological treatment of hazardous substances “In-situ Biotransformation of Carbon Tetrachloride and Other Halogenated Compounds Resulting from Biostimulation under Anoxic Conditions,” Environ.

Sci. and Technol., Vol. 26, No. 12, File Size: KB. Biotransformation of tetrachloroethylene to trichloroethylene, dichloroethylene, vinyl chloride, and carbon dioxide under methanogenic conditions. Applied and Environmental Microbiology 49(5) The prokaryotic community of a groundwater aquifer exposed to high concentrations of tetrachloromethane (CCl4) for more than three decades was followed by terminal restriction fragment length polymorphism (T-RFLP) during pump-and-treat remediation at the contamination source.

Bacterial enrichments and isolates were obtained under selective anoxic conditions, Cited by: 5. No other reference source gives you access to the most current techniques and methods for the bioremediation of chlorinated and polycyclic aromatic hydrocarbon compounds.

This book represents the work of leading experts in the fields of in situ and on-site bioremediation from North America, Europe, and Asia. Assessment of the mutagenic potential of carbon disulfide, carbon tetrachloride, dichloromethane, ethylene dichloride and methyl bromide: A comparative analysis in relation to ethylene In-situ.

biotransformation of carbon tetrachloride under anoxic conditions. Ada, OK: U.S. @article{osti_, title = {Degradation of trimethylbenzene isomers by an enrichment culture under N{sub 2}O-reducing conditions}, author = {Haener, A and Hoehener, P and Zeyer, J}, abstractNote = {In mineral oil-contaminated soils and aquifers, monoaromatic hydrocarbons are often a major concern because of high water solubility and toxicity.

Pathways are being characterized from bacterial isolates that grow on and completely degrade aromatic hydrocarbons under anaerobic conditions (18, 42, 75, 91, 98).

In addition, carbon tetrachloride can be metabolized by Pseudomonas stutzeri KC by a novel process (). Four examples of bioremediation were by: Semprini, L.

"In-situ Transformation of Halogenated Aliphatic Compounds under Anaerobic Conditions," Subsurface Restoration, and P.V. Roberts, "In-situ Biotransforma­tion of Carbon Tetrachloride and Other Halogenated Compounds Resulting from Biostimulation under Anoxic Conditions," Environ.

Acute carbon tetrachloride feeding induces damage of large but not small cholangiocytes from BDL rat liver. LeSage GD(1), Glaser SS, Marucci L, Benedetti A, Phinizy JL, Rodgers R, Caligiuri A, Papa E, Tretjak Z, Jezequel AM, Holcomb LA, Alpini by: Conventional pump-and-treat systems extract relatively large volumes of water with relatively low contaminant concentrations.

Because of geologic complexity and slow rates of contaminant desorption and dissolution, these systems must displace many pore volumes of aquifer water to flush out contaminants, as explained in Chapter tional pump-and-treat systems thus.

Graziosi et al.: Emissions of carbon tetrachloride from Europe degradation in the ocean (Yvon-Lewis and Butler, ) and degradation in the soil (Happell et al., ). The main concerns about this long-lived chemical are linked to its ability in destroying the stratospheric ozone layer and, as a radiatively active gas, CCl4 has an ozoneFile Size: 3MB.

Halogenated methanes, including carbon tetrachloride (CT) and chloroform (CF), are significant groundwater contaminants. Options for bioremediation of high concentrations are limited.

Previous studies have shown that an enrichment culture (designated DHM-1) that grows on corn syrup has the potential for use in bioaugmentation. DHM-1 cometabolically biotransforms high Cited by: 2. “Full-scale remediation of carbon tetrachloride using bioaugmentation”, Platform presentation, The Fifth Battelle Internation Symposium on In Situ and On-Site Bioreclamation, AprilSan Diego, Calfornia.

“Full-scale remediation of carbon tetrachloride by bioaugmentation with. .The commonly used analytic method for assessing total petroleum hydrocarbons (TPH) in soil, EPA methodis usually based on extraction with 1,1,2-trichlorotrifluoroethane (Freon ) and FTIR spectroscopy of the extracted solvent.

This method is widely used for initial site investigation, due to the relative low price per sample. It is known that the extraction efficiency Cited by: We have studied the surface-mediated reduction of pertechnetate (TcO4-) in solution by Fe(II)-bearing fracture filling material from a natural fracture in granite, hornblende, and magnetite.

The disappearance of technetium from solution was found to follow pseudo first order kinetics, the rate constant being dependent on the specific surface area and Fe(II) content of the by: