Cadmium recovery by coupling double microbial fuel cells

被引：56

作者：

Choi, Chansoo ^{[1
]}

Hu, Naixu ^{[1
]}

Lim, Bongsu ^{[2
]}

机构：

[1] Daejeon Univ, Dept Appl Chem, Taejon 300716, South Korea

[2] Daejeon Univ, Dept Environm Engn, Taejon 300716, South Korea

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 170卷

基金：

新加坡国家研究基金会;

关键词：

Double microbial fuel cell arrangement; Power boosting effects; Charge transfer resistance; Redox-flow battery; Le Chatelier's principle; WASTE-WATER; HEAVY-METALS; REMOVAL; GENERATION; REDUCTION;

D O I：

10.1016/j.biortech.2014.07.087

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Cr(VI)-MFC of the double microbial fuel cell (d-MFC) arrangement could successfully complement the insufficient voltage and power needed to recover cadmium metal from Cd(II)-MFC, which operated as a redox-flow battery. It was also possible to drain electrical energy from the d-MFC by an additional passage. The highest maximum utilization power density (22.5 Wm(2)) of Cr(VI)-MFC, with the cathode optimized with sulfate buffer, was 11.3 times higher than the highest power density directly supplied to Cd(II)-MFC (2.0 Wm(2)). Cr(VI)-MFC could generate 3 times higher power with the additional passage than without it; and the current density for the former was 4.2 times higher than the latter at the same maximum power point (38.0 Am-2 vs. 9.0 Am-2). This boosting phenomenon could be explained by the Le Chatelier's principle, which addresses the rate of electron-hole pair formation that can be accelerated by quickly removing electrons generated by microorganisms. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：361 / 369

页数：9

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