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Title of article :
Cadmium recovery by coupling double microbial fuel cells
Author/Authors :
Choi، نويسنده , , Chansoo and Hu، نويسنده , , Naixu and Lim، نويسنده , , Bongsu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
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Abstract :
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.
Keywords :
charge transfer resistance , Power boosting effects , Redox-flow battery , Le Chatelier’s principle , Double microbial fuel cell arrangement
Journal title :
Bioresource Technology
Journal title :
Bioresource Technology
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