MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, No. 38 Tongyan Road, Jinnan District, Tianjin, 300350, China.
School of Environmental Science and Engineering, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin, 300072, China.
Environ Pollut. 2022 Jan 15;293:118519. doi: 10.1016/j.envpol.2021.118519. Epub 2021 Nov 15.
Halogenated organic compounds are persistent pollutants, whose persistent contamination and rapid spread seriously threaten human health and the safety of ecosystems. It is difficult to remove them completely by traditional physicochemical techniques. In-situ remediation utilizing bioelectrochemical technology represents a promising strategy for degradation of halogenated organic compounds, which can be achieved through potential modulation. In this review, we summarize the reactor configuration of microbial electrochemical dehalogenation systems and relevant organohalide-respiring bacteria. We also highlight the mechanisms of electrode potential regulation of microbial dehalogenation and the role of extracellular electron transfer in dehalogenation process, and further discuss the application of bioelectrochemical technology in bioremediation of halogenated organic compounds. Therefore, this review summarizes the status of research on microbial electrochemical dehalogenation systems from macroscopic to microscopic levels, providing theoretical support for the development of rapid and efficient in situ bioremediation technologies for halogenated organic compounds contaminated sites, as well as insights for the removal of refractory fluorides.
卤代有机化合物是持久性污染物，其持久的污染和快速传播严重威胁着人类健康和生态系统的安全。传统的物理化学技术很难将其完全去除。利用生物电化学技术进行原位修复是降解卤代有机化合物的一种很有前途的策略，可以通过潜在的调节来实现。在本综述中，我们总结了微生物电化学脱卤系统的反应器结构和相关的有机卤化物呼吸细菌。我们还强调了微生物脱卤过程中电极电位调节的机制以及细胞外电子传递在脱卤过程中的作用，并进一步讨论了生物电化学技术在卤代有机化合物生物修复中的应用。因此，本综述从宏观到微观层面总结了微生物电化学脱卤系统的研究现状，为快速高效原位修复卤代有机化合物污染场地的生物修复技术的发展提供了理论支持，并为去除难处理的氟化物提供了思路。
