Detoxification mechanisms of electroactive microorganisms under toxicity stress: A review

Huajun Feng; Liyang Xu; Ruya Chen; Xiangjuan Ma; Hua Qiao; Nannan Zhao; Yangcheng Ding; Di Wu

doi:10.3389/fmicb.2022.1084530

Detoxification mechanisms of electroactive microorganisms under toxicity stress: A review

Front Microbiol. 2022 Nov 29:13:1084530. doi: 10.3389/fmicb.2022.1084530. eCollection 2022.

Authors

Huajun Feng^{1

2}, Liyang Xu^{1

2}, Ruya Chen^{1

2}, Xiangjuan Ma^{1

2}, Hua Qiao³, Nannan Zhao^{1

2}, Yangcheng Ding^{1

2}, Di Wu⁴

Affiliations

¹ School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang, China.
² International Science and Technology Cooperation Platform for Low-Carbon Recycling of Waste and Green Development, Zhejiang Gongshang University, Hangzhou, Zhejiang, China.
³ Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing, China.
⁴ Faculty of Bioengineering, Ghent University, Ghent, Belgium.

Abstract

Remediation of environmental toxic pollutants has attracted extensive attention in recent years. Microbial bioremediation has been an important technology for removing toxic pollutants. However, microbial activity is also susceptible to toxicity stress in the process of intracellular detoxification, which significantly reduces microbial activity. Electroactive microorganisms (EAMs) can detoxify toxic pollutants extracellularly to a certain extent, which is related to their unique extracellular electron transfer (EET) function. In this review, the extracellular and intracellular aspects of the EAMs' detoxification mechanisms are explored separately. Additionally, various strategies for enhancing the effect of extracellular detoxification are discussed. Finally, future research directions are proposed based on the bottlenecks encountered in the current studies. This review can contribute to the development of toxic pollutants remediation technologies based on EAMs, and provide theoretical and technical support for future practical engineering applications.

Keywords: detoxification mechanism; electroactive microorganism; extracellular electron transfer; toxic pollutants; toxicogenic mechanism.

Publication types

Review

Grants and funding

This work was supported by the National Natural Science Foundation of China (51978615) and the Zhejiang Provincial Ten Thousand Talent Program (2021R52055).