Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1021/es402197s |
| Title (Primary) | Enantioselective carbon stable isotope fractionation of hexachlorocyclohexane during aerobic biodegradation by Sphingobium spp. |
| Author | Bashir, S.; Fischer, A.; Nijenhuis, I.; Richnow, H.H. |
| Source Titel | Environmental Science & Technology |
| Year | 2013 |
| Department | ISOBIO |
| Volume | 47 |
| Issue | 20 |
| Page From | 11432 |
| Page To | 11439 |
| Language | englisch |
| UFZ wide themes | RU3; |
| Abstract | Carbon isotope fractionation was investigated for the biotransformation of γ- and α- hexachlorocyclohexane (HCH) as well as enantiomers of α-HCH using two aerobic bacterial strains: Sphingobium indicum strain B90A and Sphingobium japonicum strain UT26. Carbon isotope enrichment factors (εc) for γ-HCH (εc = −1.5 ± 0.1‰ and −1.7 ± 0.2‰) and α-HCH (εc = −1.0 ± 0.2‰ and −1.6 ± 0.3‰) were similar for both aerobic strains, but lower in comparison with previously reported values for anaerobic γ- and α-HCH degradation. Isotope fractionation of α-HCH enantiomers was higher for (+) α-HCH (εc = −2.4 ± 0.8 ‰ and −3.3 ± 0.8 ‰) in comparison to (−) α-HCH (εc = −0.7 ± 0.2‰ and −1.0 ± 0.6‰). The microbial fractionation between the α-HCH enantiomers was quantified by the Rayleigh equation and enantiomeric fractionation factors (εe) for S. indicum strain B90A and S. japonicum strain UT26 were −42 ± 16% and −22 ± 6%, respectively. The extent and range of isomer and enantiomeric carbon isotope fractionation of HCHs with Sphingobium spp. suggests that aerobic biodegradation of HCHs can be monitored in situ by compound-specific stable isotope analysis (CSIA) and enantiomer-specific isotope analysis (ESIA). In addition, enantiomeric fractionation has the potential as a complementary approach to CSIA and ESIA for assessing the biodegradation of α-HCH at contaminated field sites. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=14184 |
| Bashir, S., Fischer, A., Nijenhuis, I., Richnow, H.H. (2013): Enantioselective carbon stable isotope fractionation of hexachlorocyclohexane during aerobic biodegradation by Sphingobium spp. Environ. Sci. Technol. 47 (20), 11432 - 11439 10.1021/es402197s |
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