Bioremediation of typical chlorinated hydrocarbons by microbial reductive dechlorination and its key players: A review.

Zhixing Xiao, Wei Jiang, Dan Chen, Yan Xu

Journal: Ecotoxicology and environmental safety 2020;202():110925

PMID: 32800212

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Abstract

Chlorinated hydrocarbon contamination in soils and groundwater has a severe negative impact on the human health. Microbial reductive dechlorination is a major degradation pathway of chlorinated hydrocarbon in anaerobic subsurface environments, has been extensively studied. Recent progress on the diversity of the reductive dechlorinators and the key enzymes of chlororespiration has been well reviewed. Here, we present a thorough overview of the studies related to bioremediation of chloroethenes and polychlorinated biphenyls based on enhanced in situ reductive dechlorination. The major part of this review is to provide an up-to-date summary of functional microorganisms which are either detected during in situ biostimulation or applied in bioaugmentation strategies. The applied biostimulants and corresponding reductive dechlorination products are also summarized and the future research needs are finally discussed.

Address: College of Urban Construction, Nanjing Tech University, Nanjing, 211816, PR China.; Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing, 210096, PR China.; Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing, 210096, PR China. Electronic address: [email protected].

DOI: 10.1016/j.ecoenv.2020.110925

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MeSH Terms: Biodegradation, Environmental, Groundwater, Halogenation, Hydrocarbons, Chlorinated, Polychlorinated Biphenyls, Vinyl Chloride