Reduction transformation of trichloroethene by cobalamin: reactivities of the intermediates acetylene, chloroacetylene, and the DCE isomers
Article Abstract:
Acetylene, chloroacetylene, 1, 1,-dichloroethene (DCE) and cis-and trans-DE transformations were studied at ph 8 and 22 degrees celsius, moderated by cobalamin in the presence of titanium (III) citrate. With vinylcobalamin as the proposed intermediate, acetylene quantitatively reacted to ethene. With ethynylcobalamin and vinylcobalamin as the proposed intermediates, chloroacetylene reacted to acetylene and binyl chloride. Ethynylcobalamin resulted from the initial reaction with chloroacetylene, which later decomposed to acetylene. Fitting reaction models to kinetic data was used as basis for the proposed formation of ethynyl and vinylcobalamin.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Combined laboratory/field study on the use of nitrate for in situ bioremediation of a fuel-contaminated aquifer
Article Abstract:
The use of nitrate in the bioremediation of fuel-contaminated groundwater was shown to offer only moderate improvement in contaminant reduction. Core material removed from the nitrate treated and control areas showed varying degrees of alkylbenzene removal governed by the denitrifying and iron-reducing characteristics of the soil column above the aquifer. The reductions in the aquifer's contaminants were shown to be a function of anaerobic bioremediation rather than a direct effect of nitrification.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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Byproducts of anaerobic alkylbenzene metabolism useful as indicators of in situ bioremediation
Article Abstract:
A study was conducted to examine the behavior and properties of benzylsuccinic acid and related compounds as biogeochemical indicators of in situ anaerobic alkyl-benzene metabolism. Observations showed that biological metabolism of these compounds determines the fate of alkylbenzenes and associated metabolic byproducts in groundwater.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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