PMID: 15224745Jul 1, 2004Paper

Stable carbon isotope fractionation during aerobic biodegradation of chlorinated ethenes

Environmental Science & Technology
Kung-Hui ChuLisa Alvarez-Cohen

Abstract

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. Of the three solvents, the largest fractionation effects were observed for biodegradation of VC. Both metabolic and cometabolic VC degradation were studied using Mycobacterium aurum L1 (grown on VC), Methylosinus trichosporium OB3b (grown on methane), Mycobacterium vaccae JOB5 (grown on propane), and two VC enrichment cultures seeded from contaminated soils of Alameda Point and Travis Air Force Base, CA. M. aurum L1 caused the greatest fractionation (epsilon = -5.7) while for the cometabolic cultures, epsilon values ranged from -3.2 to -4.8. VC fractionation patterns for the enrichment cultures were within the range of those observed for the metabolic and cometabolic cultures (epsilon = -4.5 to -5.5). The fractionation for cometabolic degradation of TCE by Me. trichosporium OB3b was low (epsilon = -1.1), while no quantifiable carbon isotopic fractionation was observed during the cometabol...Continue Reading

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Citations

Sep 29, 2007·Analytical and Bioanalytical Chemistry·Michaela BlessingTorsten C Schmidt
Jul 17, 2009·Environmental Science & Technology·Concepción Carreón-DiazcontiMark L Brusseau
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Jun 8, 2018·Environmental Pollution·Michelle A MyersShaily Mahendra

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