Results 211 to 220 of about 81,585 (259)

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
openaire   +2 more sources

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
openaire   +1 more source

Enhanced in situ bioremediation of chlorinated ethenes: from in situ microcosms to full-scale application

Bioremediation Journal
Concentrations greater than 20 mg/L of chlorinated volatile organic compounds (cVOCs) including tetrachloroethene (PCE), trichloroethene (TCE), and cis-1,2-dichloroethene (cDCE) have been present in site groundwater for more than four decades. To promote
A. L. Polasko, William Ponticello, Shaily Mahendra, Laurie LaPat-Polasko   +3 more
semanticscholar   +1 more source

Stable Carbon Isotope Fractionation during Aerobic Biodegradation of Chlorinated Ethenes

Environmental Science & Technology, 2004
Stable isotope analysis is recognized as a powerful tool for monitoring, assessing, and validating in-situ bioremediation processes. In this study, kinetic carbon isotope fractionation factors (epsilon) associated with the aerobic biodegradation of vinyl chloride (VC), cis-1,2-dichloroethylene (cDCE), and trichloroethylene (TCE) were examined.
Kung-Hui, Chu, Shaily, Mahendra, Donald L, Song, Mark E, Conrad, Lisa, Alvarez-Cohen   +4 more
openaire   +2 more sources

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 ...
openaire   +2 more sources

Compatibility of chelators with permanganate for chelator-enhanced permanganate-based ISCO remediation of chlorinated ethenes DNAPLs

, 2020
Permanganate-based ISCO (in situ chemical oxidation) has been commonly utilized to remediate chlorinated ethenes DNAPLs (dense non-aqueous phase liquids), but the treatment is seriously hindered by the formation of MnO2 rinds that encapsulate DNAPLs.
Libin Peng, Laisheng Li, Zhi-liang Chen, Dayi Deng   +3 more
semanticscholar   +1 more source

Phytoremediation of chlorinated ethenes in seepline sediments: tree selection.

International journal of phytoremediation, 2009
Phytoremediation of chlorinated ethene (CE)-contaminated water was investigated at the Savannah River Site in Aiken, SC, USA. Perchloroethylene (PCE) and trichloroethylene (TCE) are present where CE-contaminated groundwater currently outcrops in seepline soils.
Andrine, Stanhope, Christopher J, Berry, Robin L, Brigmon   +2 more
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IN SITU Bioremediation Of Chlorinated Ethene Source Zones

2014
In situ bioremediation (ISB) was not initially considered a feasible technology for treating chlorinated solvent source zones, and it still faces some skepticism. However, experience over the last decade demonstrates that it is a viable technology for treating some source zones, although realistic objectives must be set.
Hans F. Stroo, Michael R. West, Bernard H. Kueper, Robert C. Borden, David W. Major, C. Herb Ward   +5 more
openaire   +1 more source

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