title: [Research advances in microbial dechlorination of polychlorinated biphenyls].
abstract: Polychlorinated biphenyls (PCBs) are the typical persistent organic pollutants (POPs) in the environment. As a ubiquitous attenuation course of chlorinated organic compounds in anoxic environment, the microorganism-mediated reductive dechlorination process plays an important role in PCBs transformation, especially the transformation of higher chlorinated PCBs. The higher chlorinated PCBs can be dechlorinated in anaerobic condition, and thus, their persistence and toxicity can be decreased. The resultant lower chlorinated PCBs from the dechlorination can be further degraded and completely mineralized in aerobic condition. This paper summarized the research advances of PCBs microbial reductive dechlorination, introduced the mechanisms and characteristics of the dechlorination and the related specific microorganisms, and approached the affecting factors of PCBs bio-dechlorination, as well as the significances of anaerobic dechlorination coupling with aerobic degradation. The future research directions, including the complex metabolic networks of dechlorinating microbial populations, the screening of novel specific dechlorinators and their practical applications in the remediation of PCBs contaminated sites were also prospected.
authors.affiliation: Institute of Environmental Science and Technology, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China. chenchen_myf@163.com
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.forename: Jing-Lan
authors.initials: JL
authors.lastname: Cui
authors.forename: Zhi-Hui
authors.initials: ZH
authors.lastname: Qin
authors.forename: Chun-Na
authors.initials: CN
authors.lastname: Yu
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.forename: Chao-Feng
authors.initials: CF
authors.lastname: Shen
authors.forename: Ying-Xu
authors.initials: YX
authors.lastname: Chen
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D004785:Environmental Pollutants / Q000302:isolation & purification* / Q000378:metabolism; D019015:Geologic Sediments / Q000382:microbiology; D054879:Halogenation; D010084:Oxidation-Reduction; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification* / Q000378:metabolism; D012988:Soil Microbiology
chemical_list: D004785:Environmental Pollutants; D011078:Polychlorinated Biphenyls