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Journal of Analytical Methods in Chemistry - Volume 2014 2014, Article ID 371510, 6 pages -

Research Article

Environmental Science Research Institute, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, China

Received 18 February 2014; Revised 4 May 2014; Accepted 16 May 2014; Published 4 June 2014

Academic Editor: Bengi Uslu

Copyright © 2014 Yingru Wang and Xiaohua Lu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Hexachlorobenzene HCB is a persistent organic pollutant and poses great threat on ecosystem and human health. In order to investigate the degradation law of HCB, a RuO2-Ti material was used as the anode, meanwhile, zinc, stainless steel, graphite, and RuO2-Ti were used as the cathode, respectively. The gas chromatography GC was used to analyze the electrochemical products of HCB on different cathodes. The results showed that the cathode materials significantly affected the dechlorination efficiency of HCB, and the degradation of HCB was reductive dechlorination which occurred only on the cathode. During the reductive process, chlorine atoms were replaced one by one on various intermediates such as pentachlorobenzene, tetrachlorobenzene, and trichlorobenzene occurred; the trichlorobenzene was obtained when zinc was used as cathode. The rapid dechlorination of HCB suggested that the electrochemical method using zinc or stainless steel as cathode could be used for remediation of polychlorinated aromatic compounds in the environment. The dechlorination approach of HCB by stainless steel cathode could be proposed.





Autor: Yingru Wang and Xiaohua Lu

Fuente: https://www.hindawi.com/



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