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Recent advances in the biodegradation of polychlorinated biphenyls

Authors
  • Xiang, Yun1
  • Xing, Ziyu1
  • Liu, Juan2
  • Qin, Wei2
  • Huang, Xing1
  • 1 Nanjing Agricultural University, Nanjing, 210095, People’s Republic of China , Nanjing (China)
  • 2 Forestry and Horticulture College, Xinjiang Agricultural University, Urumqi, 830052, People’s Republic of China , Urumqi (China)
Type
Published Article
Journal
World Journal of Microbiology and Biotechnology
Publisher
Springer Netherlands
Publication Date
Aug 30, 2020
Volume
36
Issue
10
Identifiers
DOI: 10.1007/s11274-020-02922-2
Source
Springer Nature
Keywords
License
Yellow

Abstract

Polychlorinated biphenyls (PCBs) are typical lasting organic pollutants. Persistence and recalcitrance to biodegradation of PCBs have hampered the transformation of PCB congeners from the environment. Biological transformation of polychlorinated biphenyls could take place through anaerobic dechlorination, aerobic microbial degradation, and a combination of transformation of anaerobic dechlorination and aerobic degradation. Under anaerobic conditions, microbial dechlorination is an important degradation mode for PCBs, especially high-chlorinated congeners. The low-chlorinated compounds formed after reductive dechlorination could be further aerobically degraded and completely mineralized. This paper reviews the recent advances in biological degradation of PCBs, introduces the functional bacteria and enzymes involved in the anaerobic and aerobic degradation of PCBs, and discusses the synergistic action of anaerobic reduction and aerobic degradation. In addition, the different ways to the microbial remediation of PCBs-contaminated environments are discussed. This review provides a theoretical foundation and practical basis to use PCBs-degrading microorganisms for bioremediation.

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