Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
Bioresour Technol. 2019 Jan;271:439-448. doi: 10.1016/j.biortech.2018.09.133. Epub 2018 Sep 28.
The extracellular electron transfer (EET) between microorganisms and electrodes forms the basis for microbial electrochemical technology (MET), which recently have advanced as a flexible platform for applications in energy and environmental science. This review, for the first time, focuses on the electrode-biofilm capable of bidirectional EET, where the electrochemically active bacteria (EAB) can conduct both the outward EET (from EAB to electrodes) and the inward EET (from electrodes to EAB). Only few microorganisms are tested in pure culture with the capability of bidirectional EET, however, the mixed culture based bidirectional EET offers great prospects for biocathode enrichment, pollutant complete mineralization, biotemplated material development, pH stabilization, and bioelectronic device design. Future efforts are necessary to identify more EAB capable of the bidirectional EET, to balance the current density, to evaluate the effectiveness of polarity reversal for biocathode enrichment, and to boost the future research endeavors of such a novel function.
微生物与电极之间的细胞外电子传递（EET）是微生物电化学技术（MET）的基础，该技术最近已作为一种灵活的平台在能源和环境科学领域得到了广泛的应用。本综述首次重点介绍了能够双向电子传递的电极-生物膜，其中电化学活性细菌（EAB）既能进行外向电子传递（从 EAB 到电极），也能进行内向电子传递（从电极到 EAB）。尽管只有少数微生物在纯培养中被测试具有双向 EET 的能力，但基于混合培养的双向 EET 为生物阴极富集、污染物完全矿化、生物模板材料开发、pH 值稳定和生物电子器件设计提供了广阔的前景。未来需要努力鉴定更多具有双向 EET 能力的 EAB，以平衡电流密度，评估极性反转对生物阴极富集的有效性，并推动对这种新型功能的未来研究。
