Aerobic debromination of deca-BDE: Isolation and characterization of an indigenous isolate from a PBDE contaminated sediment

Daiyong Deng, Jun Guo, Guoping Sun, Xingjuan Chen, Mengde Qiu, Meiying Xu

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

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 μg 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.

Original languageEnglish (US)
Pages (from-to)465-469
Number of pages5
JournalInternational Biodeterioration and Biodegradation
Volume65
Issue number3
DOIs
StatePublished - Jun 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Biomaterials
  • Waste Management and Disposal

Keywords

  • Aerobic biodebromination
  • Decabromodiphenyl ether
  • Lysinibacillus fusiformis DB-1
  • Polybrominated diphenyl ethers

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