期刊
BIORESOURCE TECHNOLOGY
卷 305, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123166
关键词
Microbial fuel cell; Cathode catalyst; Copper removal; Microbial community
资金
- National Key RD Plan of China [2017YFC1404603]
- Natural Science Foundation of Heilongjiang [E2017020]
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 Cu2+ removal and electricity production. Results indicated rGO-MFC and Pt/C-MFC had much better Cu2+-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 Cu2+ resulted in different cathodic microbial communities. At high Cu2+ contents, Nitratireductor, Ochrobactrum, and Serratia as efficient Cu2+-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.
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