US EPA

4453466 

Journal Article 

Enhanced vanadium (V) reduction and bioelectricity generation in microbial fuel cells with biocathode 

Qiu, Rui; Zhang, B; Li, J; Lv, Q; Wang, S; Gu, Q 

2017 

Yes 

Journal of Power Sources
ISSN: 0378-7753 

359 

379-383 

10.1016/j.jpowsour.2017.05.099 

WOS:000403548200046 

Microbial fuel cells (MFCs) represent a promising approach for remediation of toxic vanadium (V) contaminated environment. Herein, enhanced V(V) reduction and bioelectricity generation are realized in MFCs with biocathode. Synergistically electrochemical and microbial reductions result in the nearly complete removals of V(V) within 7 d operation with initial concentration of 200 mg L-1. Maximum power density of 529 +/- 12 mW m(-2) is obtained. Electrochemical tests reveal that biocathode promotes electron transfers and reduces charge transfer resistance. XPS analysis confirms that V(IV) is the main reduction product, which precipitates naturally under neutral conditions. High-throughput 16S rRNA gene sequencing analysis indicates that the newly appeared Dysgonomonas is responsible for V(V) reduction and Klebsiella contributes mainly to bioelectricity generation in MFCs with biocathode. This study further improves the performance of remediating V(V) contaminated environment based on MFC technology. (C) 2017 Elsevier B.V. All rights reserved. 

Microbial fuel cells; Vanadium (V); Microbial community diversity; Bioelectricity generation; Biocathode