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A systematic understanding of microbial reductive dechlorination towards an improved “one health” soil bioremediation: A review and perspective

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Science China Technological Sciences 2024年第10期67卷 3009-3031页

作者： HE Yan LI ShuYao YUAN Jing CHENG Jie DOU JiBo YANG XueLing XU JianMing Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment Institute of Soil and Water Resources and Environmental ScienceCollege of Environmental and Resource SciencesZhejiang University Key Laboratory of Environment Remediation and Ecological Health Ministry of Education Microbiome Network and Department of Agricultural Biology Colorado State University Departments of Chemistry and Chemical & Biomolecular Engineering Institute for Functional Intelligent Materials (I-FIM)National University of Singapore

Chlorinated organic pollutants(COPs), both emerging and traditional, are typical persistent pollutants that harm soil health worldwide. Dechlorinators mediated reductive dechlorination is the optimal way to completely remove COPs from anaerobic soil through a redox reaction driven by electron transfer during microbial anaerobic respiration. Generally, the dechlorinated depletion of COPs in situ often interacts with multiple element biogeochemical activities, e.g., methanogenesis, sulfate reduction, iron reduction, and denitrification. Elucidating the relevance of biogeochemical cycles between COPs and multiple elements and the coupled mechanisms involved, thus, helps to develop effective pollution control strategies with the balance between pollution degradation and element cycles in heterogeneous soil, ultimately contributing to “one health” goal. In this review, we summarized the microbial-chemical coupling redox processes and the driving factors, elucidated the interspecies metabolites exchange and electron transfer mechanisms within COP-dechlorinating communities, and further proposed a detailed design, construction, and analysis framework of engineering COP-dechlorinating microbiomes via “top-down” selfassembly and “bottom-up” synthesis to pave the way from laboratory to practical field application. Especially, we delve into the major challenges and perspectives surrounding the design of state-of-the-art synthetic microbial communities. Our goal is to improve the understanding of the microbial-mediated coupling between reductive dechlorination and element biogeochemical cycling, with a particular focus on the implications for health-integrated soil bioremediation under the “one health” concept.

关键词： reductive dechlorination biogeochemical redox processes interspecies interaction synthetic microbiomes, anaerobic soils

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