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Title (Primary) Stable isotope fractionation of γ-hexachlorocyclohexane (lindane) during reductive dechlorination by two strains of sulfate-reducing bacteria
Author Badea, S.L.; Vogt, C.; Weber, S.; Danet, A.-F.; Richnow, H.-H.;
Journal Environmental Science & Technology
Year 2009
Department ISOBIO;
Volume 43
Issue 9
Language englisch;
Abstract Carbon isotope fractionation factors were determined with the dichloro elimination of g-hexachlorocyclohexane (g-HCH) by the sulfate-reducing bacteria Desulfococcus multivorans DSM 2059 and Desulfovibrio gigas DSM 1382. Both strains are known for cometabolic HCH dechlorination. Degradation experiments with g-HCH in concentrations of 22-25 µM were carried out using benzoate (for D. multivorans) and lactate (for D. gigas) as electron donors, respectively. g-HCH was dechlorinated by both bacterial strains within four weeks, and the metabolites g-3,4,5,6-tetrachlorocyclohexene (g-TCCH), chlorobenzene (CB), and benzene were formed. The carbon isotope fractionation of g-HCH dechlorination was quantified by the Rayleigh model, using a bulk enrichment factor (eC) of -3.9 ± 0.6 for D. gigas and -3.4 ± 0.5 for D. multivorans, which correspond to apparent kinetic isotope effect (AKIEC) values of 1.023 ± 0.004 or 1.02 ± 0.003 for stepwise Cl-C bond cleavage. The extent and range of isotope fractionation suggest that g-HCH dechlorination can be monitored in anoxic environments by compound-specific isotope analysis (CSIA).
ID 29
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=29
Badea, S.L., Vogt, C., Weber, S., Danet, A.-F., Richnow, H.-H. (2009):
Stable isotope fractionation of γ-hexachlorocyclohexane (lindane) during reductive dechlorination by two strains of sulfate-reducing bacteria
Environ. Sci. Technol. 43 (9), 3155 - 3161