期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 65, 期 3, 页码 465-469出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2011.01.008
关键词
Polybrominated diphenyl ethers; Decabromodiphenyl ether; Aerobic biodebromination; Lysinibacillus fusiformis DB-1
资金
- Natural Science Foundation of Guangdong, China [9351007002000001]
- Foundation of Guangdong Academy of Sciences [qnjj200805]
- Guangdong-Hongkong Technology Cooperation [2009A030902003]
The environmental safety of decabromodiphenyl ether (deca-BDE) has been the topic of controversial discussions during the recent years. Reductive debromination of deca-BDE in the environment was proved to be a significant source of lower-brominated Polybrominated diphenyl ethers (PBDEs) to the ecosystem. Currently, very little is known about the susceptibility of deca-BDE to aerobic biotransformation. Lysinibacillus fusiformis strain DB-1, an aerobic bacterium capable of debromination of deca-BDE, was isolated from sediments of LianjiangRiver, Guiyu in Guangdong of China. DB-1 can efficiently transform deca-BDE to lower brominated BDEs using carbon sources such as lactate, pyruvate and acetate, respectively. In liquid cultures, free bromide concentration accumulated to 1220 mu g L-1 with 6 mg L-1 of the nominal initial concentration of deca-BDE after 72 h aerobic incubation. The resting cell activity tests showed that debromination of deca-BDE by DB-1 was an aerobic process. This is the first report for biotransformation of deca-BDE by an indigenous bacterium isolated from PBDEs contaminated environment. (C) 2011 Elsevier Ltd. All rights reserved.
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