Biodegradation of Decabromodiphenyl Ether (BDE-209) by Crude Enzyme Extract from Pseudomonas aeruginosa

Yu Liu, Ai-Jun Gong, Li-Na Qiu, Jing-Rui Li and Fu-Kai Li
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Yu Liu: School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Ai-Jun Gong: School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Li-Na Qiu: School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Jing-Rui Li: School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
Fu-Kai Li: School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China

IJERPH, 2015, vol. 12, issue 9, 1-19

Abstract: The biodegradation effect and mechanism of decabromodiphenyl ether (BDE-209) by crude enzyme extract from Pseudomonas aeruginosa were investigated. The results demonstrated that crude enzyme extract exhibited obviously higher degradation efficiency and shorter biodegradation time than Pseudomonas aeruginosa itself. Under the optimum conditions of pH 9.0, 35 °C and protein content of 2000 mg/L, 92.77% of the initial BDE-209 (20 mg/L) was degraded after 5 h. A BDE-209 biodegradation pathway was proposed on the basis of the biodegradation products identified by GC-MS analysis. The biodegradation mechanism showed that crude enzyme extract degraded BDE-209 into lower brominated PBDEs and OH-PBDEs through debromination and hydroxylation of the aromatic rings.

Keywords: BDE-209; biodegradation; Pseudomonas aeruginosa; crude enzyme extract; biodegradation mechanism (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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