Feasibility Study of Azo Dye Treatment by Decolorized Metabolites-Assisted Salt-Bearing Microbial Fuel Cells
Volume 4, Issue 2, April 2016, Pages: 99-108
Received: May 17, 2016;
Published: May 18, 2016
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Pei-Lin Yueh, Department of Chemical and Materials Engineering, National I-Lan University, I-Lan, Taiwan, R.O.C.
Bor Yann Chen, Department of Chemical and Materials Engineering, National I-Lan University, I-Lan, Taiwan, R.O.C.
Chung Chuan Hsueh, Department of Chemical and Materials Engineering, National I-Lan University, I-Lan, Taiwan, R.O.C.
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Prior findings mentioned that -OH and -NH2 substitute-containing auxochrome compounds (e.g., 2-aminophenol and 1,2-dihydroxybenzene) could act as electron shuttles (ESs) for simultaneous dye decolorization and bioelectricity generation (DD&BG) in microbial fuel cells (MFCs). This feasibility study used decolorized intermediates (DIs) of reactive blue 171, reactive blue 5, reactive red 198 to show such significant electron-shuttling capabilities. Cyclic voltammetric inspections clearly revealed that some of DIs could act as ESs to enhance dye-decolorizing and bioelectricity-generating capabilities without dispute. However, electron transfer (ET) efficiency significantly reduced ca. 40% at higher salt conditions. With supplementation of DIs, ET efficiency was apparently augmented for highly efficient DD and BG. Meanwhile, significant stimulation of ET characteristics also overcame osmotic pressure-gradients between intracellular and extracellular compartments for promising DD and BG. Accumulation of DIs was kinetically favorable for expression of dye-decolorizing capabilities. Of course, such accumulation of DIs autocatalytically enhanced DD and MFC-assisted treatment was technically appropriate for ET-based bioremediation.
Electron Shuttles, Textile Dyes, Bioelectricity Generation, Microbial Fuel Cells, Decolorized Intermediates
To cite this article
Bor Yann Chen,
Chung Chuan Hsueh,
Feasibility Study of Azo Dye Treatment by Decolorized Metabolites-Assisted Salt-Bearing Microbial Fuel Cells, Science Discovery.
Vol. 4, No. 2,
2016, pp. 99-108.