KONG Yong, WANG Zhi-liang, WANG Yu, YUAN Jia, CHEN Zhi-dong. Degradation of methyl orange in artificial wastewater through electrochemical oxidation using exfoliated graphite electrode. New Carbon Mater., 2011, 26(6): 459-464. doi: 10.1016/S1872-5805(11)60092-9
Citation:
KONG Yong, WANG Zhi-liang, WANG Yu, YUAN Jia, CHEN Zhi-dong. Degradation of methyl orange in artificial wastewater through electrochemical oxidation using exfoliated graphite electrode. New Carbon Mater., 2011, 26(6): 459-464. doi: 10.1016/S1872-5805(11)60092-9
KONG Yong, WANG Zhi-liang, WANG Yu, YUAN Jia, CHEN Zhi-dong. Degradation of methyl orange in artificial wastewater through electrochemical oxidation using exfoliated graphite electrode. New Carbon Mater., 2011, 26(6): 459-464. doi: 10.1016/S1872-5805(11)60092-9
Citation:
KONG Yong, WANG Zhi-liang, WANG Yu, YUAN Jia, CHEN Zhi-dong. Degradation of methyl orange in artificial wastewater through electrochemical oxidation using exfoliated graphite electrode. New Carbon Mater., 2011, 26(6): 459-464. doi: 10.1016/S1872-5805(11)60092-9
1. School of Chemistry and Chemical Engineering, Changzhou University, Changzhou 213164, China;
2.
Jiangsu Academy of Environmental Science, Key Laboratory of Environment Engineering of Jiangsu Province, Nanjing 210036, China
Funds:
item: Natural Science Foundation of Jiangsu Province of China (BK2009453), Priority Academic Program Development of Jiangsu Higher Education Institutions of China (PAPD) and Science & Technology Program of Changzhou (CQ20100004).
KONG Yong(1976-), male, Ph.D., Associate Professor, engaged in research of advanced functional materials. Tel/Fax: +86-519-86330239, E-mail: yzkongyong@yahoo.com.cn
Exfoliated graphite (EG), with good electronic conductivity, was used as an anode material for the electrochemical degradation of methyl orange (MO), an artificial textile wastewater. Through the electrochemical degradation, 98.6% color removal and 58.5% chemical oxygen demand reduction was achieved at a pH of 2.0, a current density of 13mA · cm-2, an electrolyte (NaCl) concentration of 0.1mol · dm-3 and an electrolysis time of 20 min. The degradation is based on chemical adsorption and electro-oxidation. MO molecules are first adsorbed on the EG surface by hydrogen bonds between the —OH functional groups on EG and the MO molecules, which are then degraded by electrochemical oxidation. EG can therefore be regarded as an excellent material for the treatment of textile wastewater.
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