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.

All Other Basic Organic Chemical Manufacturing, Trichloroethane, Ethylene Dichloride, Acetylene for Chemical Use, Analysis, Acetylene, Vitamin B12

---

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.

Waste Management and Remediation Services, National Security, Water Pollution, Military Bases, Environmental aspects, Air bases

---

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.

Alkylbenzenes, Biogeochemistry

Similar abstracts:

• Abstracts: Transformation of carbon tetrachloride in the presence of sulfide, biotite, and vermiculite. Metallocoenzyme-mediated reductive transformation of carbon tetrachloride in titanium(III) citrate aqueous solution
• Abstracts: Reductive dehalogenation of aliphatic halocarbons by lignin peroxidase of Phanerochaete chrysosporium. Genotoxicity profiles and reaction characteristics of potassium polyethylene glycol dehalogenation of wood preserving waste
• Abstracts: Sorption and desorption rates of carbon tetrachloride and 1,2 dichlorobenzene to three organobentonites and a natural peat soil
• Abstracts: Proton generation by dissolution of intrinsic or augmented aluminosilicate minerals for in situ contaminant remediation by zero-valence-state iron
• Abstracts: Methanotrophic biodegradation of trichloroethylene in a hollow fiber membrane bioreactor. Methanotrophic TCE biodegradation in a multi-stage bioreactor

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.