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Enhanced dechlorination of carbon tetrachloride and chloroform in the presence of elemental iron and Methanosarcina barkeri, Methanosarcina thermophila, or Methanosarcina concillii

Article Abstract:

Enhanced dechlorination of carbon tetrachloride (CT) and chloroform (CF) in the presence of elemental iron and three pure cultures of methanogens: Methanosarcina barkeri, Methanosarcina thermophila, or Methanosaeta concillii. The results showed degradation of CT for all organisms and CF for M. thermophila was more rapid when hydrogen (H2) was added as an electron donor. Experiments with M. thermophila and M. concillii showed that H2 could serve as an electron donor for dechlorination of CT and CF with these organisms as well.

Comment:

Enhanced dechlorination of carbon tetrachloride (CT) & chloroform (CF) in presence of elemental iron & 3 methanogens is studied

Publisher: American Chemical Society
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
United States, Product information, Carbon Tetrachloride, Article

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Kinetics of the decomposition of chloroform including absorbed radiation effects

Article Abstract:

A fully irradiated photoreactor, where the rate of energy absorption is accurately quantified, is used to quantitatively assess the rate of decomposition of a model water pollutant by means of a photocatalytic process. With powdered titanium dioxide as the active photocatalyst, it was found that the photocatalytic decomposition rate of chloroform in water is of first order with respect to HCCl3, zero order with respect to O2 and about one-half order with respect to the volumetric rate of energy absorption.

Author: Baltanas, Miguel A., Martin, Carlos A., Cassano, Alberto E.
Publisher: American Chemical Society
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
Industrial organic chemicals, not elsewhere classified, Catalysis, Decomposition (Chemistry)

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Utilization of cathodic hydrogen as electron donor for chloroform cometabolism by a mixed, methanogenic culture

Article Abstract:

An examination of the transformation of chloroform by anaerobic bacteria in the presence of zero-valent iron revealed that chloroform degradation rates followed first-order kinetics. The use of microbial inhibitors affirm the hypothesis that methanogenic bacteria were responsible for cathodic hydrogen consumption and chloroform dechlorination using cathodic hydrogen as electron donor.

Author: Parkin, Gene F., Weathers, Lenly J., Alvarez, Pedro J.
Publisher: American Chemical Society
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
Biodegradation, Hydrogen, Electron donor-acceptor complexes

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Subjects list: Chloroform, Research, Analysis
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