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Title: Microbial dechlorination of tetrachloroethene under anaerobic environment

Abstract

Contamination of subsurface environments with chloroethenes [tetrachloroethene (PCE) trichloroethene (TCE), dichloroethenes (cis-DCE and trans-DCE) and vinyl chloride (VC)] is drawing more concerns to date than ever. The conventional remedial technique is pump-and-treat. However, due to the physical/chemical properties of this class of compounds, and the heterogenous nature of the subsurface, extraction approaches have limited success. Bioremediation represents an alternative for the dechlorination treatment. Aerobic oxidation of chloroethenes into CO{sub 2} has limited application due to the low oxygen concentration in the subsurface environment. Moreover, PCE is not subject to oxidative reaction. However, PCE has shown to undergo reductive transformation under anaerobic conditions. Therefore, the anaerobic process appears to hold the most promise for the development of a usable in-situ treatment technology. It has been shown that some of the carboxylic acids were linked to the microbial dechlorination of chloroethenes. In this work, study was focused on the anaerobic dechlorination of PCE stimulated by lactate.

Authors:
;  [1]
  1. National Risk Management Research Lab., Ada, OK (United States)
Publication Date:
OSTI Identifier:
437320
Report Number(s):
CONF-960807-
Journal ID: NMACDY; ISSN 0270-3009; TRN: 97:000878-0007
Resource Type:
Journal Article
Journal Name:
National Meeting - American Chemical Society, Division of Environmental Chemistry
Additional Journal Information:
Journal Volume: 36; Journal Issue: 2; Conference: 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996; Other Information: PBD: 1996
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 55 BIOLOGY AND MEDICINE, BASIC STUDIES; SOILS; REMEDIAL ACTION; CHLORINATED ALIPHATIC HYDROCARBONS; DECHLORINATION; GROUND WATER; BACTERIA; ANAEROBIC CONDITIONS; CARBOXYLIC ACIDS; OXIDATION; BIOCONVERSION

Citation Formats

Xu, Ning, and Sewell, G W. Microbial dechlorination of tetrachloroethene under anaerobic environment. United States: N. p., 1996. Web.
Xu, Ning, & Sewell, G W. Microbial dechlorination of tetrachloroethene under anaerobic environment. United States.
Xu, Ning, and Sewell, G W. Tue . "Microbial dechlorination of tetrachloroethene under anaerobic environment". United States.
@article{osti_437320,
title = {Microbial dechlorination of tetrachloroethene under anaerobic environment},
author = {Xu, Ning and Sewell, G W},
abstractNote = {Contamination of subsurface environments with chloroethenes [tetrachloroethene (PCE) trichloroethene (TCE), dichloroethenes (cis-DCE and trans-DCE) and vinyl chloride (VC)] is drawing more concerns to date than ever. The conventional remedial technique is pump-and-treat. However, due to the physical/chemical properties of this class of compounds, and the heterogenous nature of the subsurface, extraction approaches have limited success. Bioremediation represents an alternative for the dechlorination treatment. Aerobic oxidation of chloroethenes into CO{sub 2} has limited application due to the low oxygen concentration in the subsurface environment. Moreover, PCE is not subject to oxidative reaction. However, PCE has shown to undergo reductive transformation under anaerobic conditions. Therefore, the anaerobic process appears to hold the most promise for the development of a usable in-situ treatment technology. It has been shown that some of the carboxylic acids were linked to the microbial dechlorination of chloroethenes. In this work, study was focused on the anaerobic dechlorination of PCE stimulated by lactate.},
doi = {},
journal = {National Meeting - American Chemical Society, Division of Environmental Chemistry},
number = 2,
volume = 36,
place = {United States},
year = {1996},
month = {12}
}