Promoted reductive removal of chlorinated organic pollutants co-occurring with facilitated methanogenesis in anaerobic environment: A systematic review and meta-analysis

Reductive dechlorination is the most efficient way for depletion of chlorinated organic pollutants (COPs) in anaerobic environment, where the methanogenesis is usually mass-produced. Both processes are essentially microbial-mediated electron accepting processes and received much attention in last decades, due to their great importance for the remediation of environment polluted by COPs, and the effect of global warming as well as biogas property, respectively. In this study, these two reductive processes were comprehensively summarized based on 337 measurements out of 68 articles published from 1990 to 2019, with the special interest in digging their potential co-occurrence. A striking relevance between these two processes (p还原脱氯（Reductive dechlorination）是厌氧环境（anaerobic environment）中氯代有机污染物（chlorinated organic pollutants, COPs）消减的最高效途径，而该环境中通常会大量发生产甲烷作用（methanogenesis）。这两类过程本质上均为微生物介导的电子接受过程（microbial-mediated electron accepting processes），近数十年来受到广泛关注：前者对于氯代有机污染物污染环境的修复具有重要价值，后者则分别与全球变暖效应及沼气特性密切相关。本研究基于1990年至2019年发表的68篇文献中的337组检测数据，对这两种还原过程进行了全面综述，重点挖掘二者潜在的共现性。二者之间存在显著相关性（p