State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China; College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China.
Bioresour Technol. 2020 Jun;305:123166. doi: 10.1016/j.biortech.2020.123166. Epub 2020 Mar 9.
With graphene oxide (GO), platinum carbon (Pt/C), and reduced graphene oxide (rGO) as cathode catalysts, three types of single-chamber microbial fuel cells (MFCs) were constructed for simultaneous Cu removal and electricity production. Results indicated rGO-MFC and Pt/C-MFC had much better Cu-removing and electricity-generating performance than that of GO-MFC, and rGO-MFC presented preferable electrochemical characteristics compared with Pt/C-MFC. Microbial community analysis indicated Geobacter dominated anodic biofilms and was mainly responsible for organics degradation and electricity generation. The dual bio-selective effects by cathode catalyst and toxic Cu resulted in different cathodic microbial communities. At high Cu contents, Nitratireductor, Ochrobactrum, and Serratia as efficient Cu-removing genera played key roles in Pt/C-MFC, and Azoarcus predominant in cathodic biofilms of rGO-MFC might be important contributor for the favorable performance in this case.
以氧化石墨烯（GO）、铂碳（Pt/C）和还原氧化石墨烯（rGO）作为阴极催化剂，构建了三种单室微生物燃料电池（MFC），用于同时去除 Cu 和发电。结果表明，rGO-MFC 和 Pt/C-MFC 的 Cu 去除和发电性能均优于 GO-MFC，且 rGO-MFC 的电化学特性优于 Pt/C-MFC。微生物群落分析表明，产电菌 Geobacter 是阳极生物膜的优势菌，主要负责有机物降解和发电。阴极催化剂和有毒 Cu 的双重生物选择性作用导致了不同的阴极微生物群落。在高 Cu 浓度下，Nitratireductor、Ochrobactrum 和 Serratia 等高效 Cu 去除菌在 Pt/C-MFC 中起关键作用，而 rGO-MFC 中占优势的阴极生物膜中的 Azoarcus 可能是其性能良好的重要贡献者。
