期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 473, 期 -, 页码 215-223出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2013.12.022
关键词
Clostridium beijerinckii; Dissimilatory Fe(III) reducing bacteria; Pentachlorophenol; Dechlorination; Sorbed-Fe(II)
资金
- Major Program of National Natural Science Foundation of China [41090284, 41322006]
- National High Technology Research and Development Program of China (863 program) [2012AA06A203]
- Fundamental Research Funds for the Central Universities
A novel Fe(III) reducing bacterium, Clostridium beijerinckii Z, was isolated from glucose amended paddy slurries, and shown to dechlorinate pentachlorophenol (PCP). Fifty percent of added PCP was removed by C beijerinckii Z alone, which increased to 83% in the presence of both C. beijerinckii Z and ferrihydrite after 11 days of incubation. Without C. beijerinckii Z, the surface-bound Fe(II) also abiotically dechlorinated more than 40% of the added PCP. This indicated that the biotic dechlorination by C beijerinckii Z is a dominant process causing PCP transformation through anaerobic dechlorination, and that the dechlorination rates can be accelerated by simultaneous reduction of Fe(III). A biochemical electron transfer coupling process between sorbed Fe(II) produced by C beijerinclrii Z and reductive dehalogenation is a possible mechanism. This finding increases our knowledge of the role of Fe(III) reducing genera of Clostridium in dechlorinating halogenated organic pollutants, such as PCP, in anaerobic paddy soils. (c) 2013 Elsevier B.V. All rights reserved.
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