Abstract

Contamination by chloroethenes represents serious risks to both the environment and human life due to their toxic and sometimes carcinogenic effects. Coupling in situ chemical oxidation (ISCO) and in situ bioremediation (ISB) approaches to clean the sites contaminated by chloroethenes is increasingly being considered as a biphasic technology. Successful implementation of ISB after ISCO, however, requires an understanding of ISCO effects on indigenous microbial population responsible for biodegradation. This review focuses on interactions between three main ISCO approaches and microbial populations in chloroethenes contaminated subsurface. Chloroethenes toxicity and fate in the subsurface have also been discussed. The review further summarizes ISCO and microbial strategies for chloroethenes remediation. Indigenous microbial degrading capacity, especially the anaerobic step, may be damaged by aggressive conditions that are required for successful ISCO treatment. Therefore, the impact of oxidation agents on soil geochemistry and bioprocesses have been investigated. The review also provides up-to date summary in coupled ISCO and ISB for chloroethenes remediation. Finally, future research needs are proposed to optimize the application of this biphasic technology for the chloroethenes contaminated sites remediation.

Graphic abstract

中文翻译：

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原位化学氧化与氯乙烯的生物修复耦合：审查。

摘要

氯乙烯的污染由于其有毒的作用，有时甚至是致癌作用，对环境和人类生命均构成严重威胁。原位化学氧化（ISCO）和原位生物修复（ISB）耦合以清洁受氯乙烯污染的场所的方法越来越多地被认为是一种双相技术。但是，ISCO成功实施ISB后，需要了解ISCO对负责生物降解的土著微生物种群的影响。这篇综述着重介绍了三种主要的ISCO方法与受氯乙烯污染的地下微生物种群之间的相互作用。还讨论了氯霉素在地下的毒性和命运。该评论进一步总结了ISCO和微生物对氯乙烯的修复策略。土著微生物降解能力 尤其是厌氧步骤，可能会受到成功进行ISCO治疗所需的侵蚀性条件的损害。因此，已经研究了氧化剂对土壤地球化学和生物过程的影响。该评论还提供了ISCO和ISB结合的最新报告，用于氯乙烯的修复。最后，提出了未来的研究需求，以优化这种双相技术在氯乙烯污染场地修复中的应用。

图形摘要