Results 151 to 160 of about 603 (197)

Bioaugmentation for chlorinated ethene detoxification: Bioaugmentation and molecular diagnostics in the bioremediation of chlorinated ethene-contaminated sites

Industrial Biotechnology, 2005
During the last several years, the nascent field of environmental biotechnology has advanced through the addition of specialized contaminant- degrading microorganisms that facilitate bioremediation. This process is termed bioaugmentation. Coupled with bioaugmentation has been the emergence of targeted molecular diagnostics to better engineer and manage
Kirsti M. Ritalahti, Frank E. Löffler, Erin E. Rasch, Stephen S. Koenigsberg   +3 more
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Anaerobic Microbial Reductive Dehalogenation of Chlorinated Ethenes

Bioremediation Journal, 1999
The current knowledge on microbial reductive dechlorination of chlorinated ethenes (CEs) and its application are discussed.
Middeldorp, P.J.M., Luijten, M.L.G.C., van de Pas, B.A., van Eekert, M.H.A., Kengen, S.W.M., Schraa, G., Stams, A.J.M.   +6 more
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Dechlorination of chlorinated ethenes and acetylenes by palladized iron

Environmental Technology, 2003
The degradation of chlorinated ethenes and acetylenes by palladium coated iron was studied in batch experiments. The reactivity of palladium coated iron with tetrachloroethene and its less chlorinated ethene and acetylene derivatives showed that dechlorination rates increased as the number of chlorines decreased.
Y H, Kim, E R, Carraway
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Biodegradation of Chlorinated Ethenes

2010
Biodegradation of chlorinated ethenes by naturally occurring or artificially enhanced processes is an important component of current site remediation strategies. At this writing, several microbial mechanisms for chlorinated ethene transformation and degradation have been identified.
Paul M. Bradley, Francis H. Chapelle
openaire   +1 more source

The coadsorption of ethene and chlorine on Ag(100)

Journal of Electron Spectroscopy and Related Phenomena, 1993
Abstract We have characterised the low temperature adsorption of ethene on both clean and chlorine-precovered Ag(100) surfaces. On the clean surface at temperatures ca. 100 K ethene is found to be weakly π-bonded at all coverages with dynamic pressures of the gas being required to saturate the monolayer adsorption state. At high coverages, around the
D.A. Slater, P. Hollins, M.A. Chesters
openaire   +1 more source

Oxidation of chlorinated ethenes by potassium permanganate: a kinetics study

Journal of Hazardous Materials, 2001
The kinetics of oxidation of perchloroethylene (PCE), trichloroethylene (TCE), three isomers of dichloroethylene (DCE) and vinyl chloride (VC) by potassium permanganate (KMnO(4)) were studied in phosphate-buffered solutions of pH 7 and ionic strength approximately 0.05 M and under isothermal, completely mixed and zero headspace conditions. Experimental
K C, Huang, G E, Hoag, P, Chheda, B A, Woody, G M, Dobbs   +4 more
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Science and Policy in Risk Assessments of Chlorinated Ethenes

Annals of the New York Academy of Sciences, 2006
Abstract:  In this article the use of data obtained from standardized experimental methods, for example, as specified in OECD guidelines for the testing of chemicals, epidemiology data, and mechanism data obtained from nonstandardized experimental methods in carcinogen risk assessment is scrutinized using the most recent risk assessments made by ...
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Chlorine Isotope Fractionation during Reductive Dechlorination of Chlorinated Ethenes by Anaerobic Bacteria

Environmental Science & Technology, 2002
Chlorine isotope fractionation during reductive dechlorination of trichloroethene (TCE) and tetrachloroethene (PCE) to cis-1,2-dichloroethene (cDCE) by anaerobic bacteria was investigated. The changes in the 37Cl/35Cl ratio observed during the one-step reaction (TCE to cDCE) can be explained by the regioselective elimination of chlorine accompanied by ...
Masahiko, Numata, Noboru, Nakamura, Hiromoto, Koshikawa, Yutaka, Terashima   +3 more
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Impact of Chlorofluorocarbon 113 on Chlorinated Ethene Biodegradation

Bioremediation Journal, 2004
The inhibition of tetrachloroethene (PCE) degradation in anaerobic, ethanol-fed PCE-enrichment cultures by chlorofluorocarbon 113 (CFC113) was a function of the initial CFC113 concentration. Typically, aqueous CFC113 concentrations up to 1 mg/L slowed, but did not stop PCE-degradation, but cis-1,2-dichloroethene (cDCE) degradation was inhibited by 0.2 ...
David Bagley, Ian Sutherland, Brent Sleep   +2 more
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The anaerobic microbiology and biotreatment of chlorinated ethenes

Current Opinion in Biotechnology, 1995
Abstract Reductive dechlorination is a promising process for the bioremediation of the ubiquitous groundwater contaminants tetrachloroethene and trichloroethene. Newly isolated anaerobic bacteria dechlorinating tetra- and trichloroethene to cis-1,2-dichloroethene in a respiratory process offer exciting insight into the microbiology involved. In order
openaire   +1 more source