Deciphering characteristics of bicyclic aromatics--mediators for reductive decolorization and bioelectricity generation.
This first-attempt study quantitatively assessed electron-mediating characteristics of bicyclic aromatics - 1-amino-2-naphthol, 4-amino-1-naphthol (i.e., decolorized intermediates of azo dyes - orange I and II) for color removal and power generation in MFCs. According to cyclic-voltammetric profiles, the presence of reduction and oxidation peak potentials clearly suggested a crucial role of these intermediates as electron-shuttling mediators. Shake-flask cultures also showed that appropriate accumulation of 1A2N, 4A1N apparently enhanced color-removal efficiencies of bacterial decolorization. This study clearly suggested that suitable supplementation of electrochemically active electron shuttle(s) to dye-bearing MFCs is a promising strategy to stimulate reductive decolorization and bioelectricity generation.
School of Environmental and Materials Engineering, Yan-Tai University, Yantai 264005, China.
Bin
B
Xu
Department of Chemical and Materials Engineering, National I-Lan University, I-Lan 26047, Taiwan. Electronic address: bychen@niu.edu.tw.
Bor-Yann
BY
Chen
Department of Chemical and Materials Engineering, National I-Lan University, I-Lan 26047, Taiwan.
Chung-Chuan
CC
Hsueh
School of Environmental and Materials Engineering, Yan-Tai University, Yantai 264005, China.
Lian-Jie
LJ
Qin
Department of Environmental Engineering, National I-Lan University, I-Lan 26047, Taiwan.
Chang-Tang
CT
Chang
D001673:Biodegradation, Environmental; D001643:Bridged Bicyclo Compounds / Q000737:chemistry*; D003116:Color; D004560:Electricity; D010084:Oxidation-Reduction
D001643:Bridged Bicyclo Compounds
Decolorized intermediates; Electron shuttles; Energy recycling; Microbial fuel cell