title: Electrochemical decolorization of methyl orange powered by bioelectricity from single-chamber microbial fuel cells.
abstract: Methyl orange (MO), a typical azo dye, is a well-known recalcitrant pollutant in dye wastewater. An aeration electrochemical system with single-chamber microbial fuel cell (MFC) as renewable power sources is proposed for MO decolorization. The enhanced color removal efficiency up to 90.4% within 360 min is observed with voltage across the aeration electrolytic reactor fixed at 700 mV. The results from gas chromatography-mass spectrometry (GC-MS) analysis indicate the destruction of MO, with generation of low molecular weight compounds such as benzene derivatives. Comparison experiments imply the indirect electrochemical oxidation of MO by generated H2O2 is mainly responsible for MO decolorization in present study. This work offers a cost-effective electrochemical method for enhancing electrochemical degradation of dyes with bioelectricity generated from MFCs.
authors: School of Water Resources and Environment, China University of Geosciences Beijing, Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences Beijing), Ministry of Education, Beijing 100083, China. Electronic address: zbgcugb@gmail.com.
authors: Baogang
authors: B
authors: Zhang
authors: School of Water Resources and Environment, China University of Geosciences Beijing, Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences Beijing), Ministry of Education, Beijing 100083, China.
authors: Zhijun
authors: Z
authors: Wang
authors: Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors: Xiang
authors: X
authors: Zhou
authors: Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors: Chunhong
authors: C
authors: Shi
authors: School of Water Resources and Environment, China University of Geosciences Beijing, Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences Beijing), Ministry of Education, Beijing 100083, China.
authors: Huaming
authors: H
authors: Guo
authors: School of Water Resources and Environment, China University of Geosciences Beijing, Key Laboratory of Groundwater Circulation and Evolution (China University of Geosciences Beijing), Ministry of Education, Beijing 100083, China.
authors: Chuanping
authors: C
authors: Feng
mesh_terms: D001391:Azo Compounds / Q000378:metabolism*; D001674:Bioelectric Energy Sources; D019149:Bioreactors; D003116:Color; D004560:Electricity; D055664:Electrochemical Techniques / Q000379:methods*; D004572:Electrolysis
chemical_list: D001391:Azo Compounds; C100258:methyl orange
keywords: Azo dye; Decolorization; Electrochemical; Methyl orange; Microbial fuel cells