期刊
FEMS MICROBIOLOGY ECOLOGY
卷 71, 期 1, 页码 106-113出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1574-6941.2009.00796.x
关键词
Comamonas koreensis; iron-reducing bacterium; Fe(III) (hydr)oxide; 2; 4-dichlorophenoxyacetic acid; anaerobic transformation; dechlorination
类别
资金
- National Natural Science Foundation of China [40601043, 20777013, 40801119]
This work studied the ability of Comamonas koreensis CY01 to reduce Fe(III) (hydr)oxides by coupling the oxidation of electron donors and the enhanced biodegradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by the presence of Fe(III) (hydr)oxides. The experimental results suggested that strain CY01 can utilize ferrihydrite, goethite, lepidocrocite or hematite as the terminal electron acceptor and citrate, glycerol, glucose or sucrose as the electron donor. Strain CY01 could transform 2,4-D to 4-chlorophenol through reductive side-chain removal and dechlorination. Under the anaerobic conditions, Fe(III) reduction and 2,4-D biodegradation by strain CY01 occurred simultaneously. The presence of Fe(III) (hydr)oxides would significantly enhance 2,4-D biodegradation, probably due to the fact that the reactive mineral-bound Fe(II) species generated from Fe(III) reduction can abiotically reduce 2,4-D. This is the first report of a strain of C. koreensis capable of reducing Fe(III) (hydr)oxides and 2,4-D, which extends the diversity of iron-reducing bacteria associated with dechlorination.
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