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Aerobic Degradation Characteristics and Mechanism of Decabromodiphenyl Ether (BDE-209) Using Complex Bacteria Communities

Author

Listed:
  • Dingfan Hu

    (School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China)

  • Juan Wu

    (School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China)

  • Luosheng Fan

    (School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China)

  • Shunyao Li

    (School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China)

  • Rong Jia

    (School of Life Sciences, Anhui University, Hefei 230601, China)

Abstract

Complex bacteria communities that comprised Brevibacillus sp. (M1) and Achromobacter sp. (M2) with effective abilities of degrading decabromodiphenyl ether (BDE-209) were investigated for their degradation characteristics and mechanisms under aerobic conditions. The experimental results indicated that 88.4% of 10 mg L −1 BDE-209 could be degraded after incubation for 120 h under the optimum conditions of pH 7.0, 30 °C and 15% of the inoculation volume, and the addition ratio of two bacterial suspensions was 1:1. Based on the identification of BDE-209 degradation products via liquid chromatography–mass spectrometry (LC–MS) analysis, the biodegradation pathway of BDE-209 was proposed. The debromination, hydroxylation, deprotonation, breakage of ether bonds and ring-opening processes were included in the degradation process. Furthermore, intracellular enzymes had the greatest contribution to BDE-209 biodegradation, and the inhibition of piperyl butoxide (PB) for BDE-209 degradation revealed that the cytochrome P450 (CYP) enzyme was likely the key enzyme during BDE-209 degradation by bacteria M (1+2). Our study provided alternative ideas for the microbial degradation of BDE-209 by aerobic complex bacteria communities in a water system.

Suggested Citation

  • Dingfan Hu & Juan Wu & Luosheng Fan & Shunyao Li & Rong Jia, 2022. "Aerobic Degradation Characteristics and Mechanism of Decabromodiphenyl Ether (BDE-209) Using Complex Bacteria Communities," IJERPH, MDPI, vol. 19(24), pages 1-17, December.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:24:p:17012-:d:1007139
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    References listed on IDEAS

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    1. Douha Bannan & Nadeem Ali & Nabil A. Alhakamy & Mohamed A. Alfaleh & Waleed S. Alharbi & Muhammad Imtiaz Rashid & Nisreen Rajeh & Govindan Malarvannan, 2021. "Brominated Flame Retardants in Children’s Room: Concentration, Composition, and Health Risk Assessment," IJERPH, MDPI, vol. 18(12), pages 1-15, June.
    2. Yu Liu & Ai-Jun Gong & Li-Na Qiu & Jing-Rui Li & Fu-Kai Li, 2015. "Biodegradation of Decabromodiphenyl Ether (BDE-209) by Crude Enzyme Extract from Pseudomonas aeruginosa," IJERPH, MDPI, vol. 12(9), pages 1-19, September.
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