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.
Environmental Science Research Institute, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
J Anal Methods Chem. 2014;2014:371510. doi: 10.1155/2014/371510. Epub 2014 Jun 4.
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.
六氯苯（HCB）是一种持久性有机污染物，对生态系统和人类健康构成巨大威胁。为了研究 HCB 的降解规律，采用 RuO2/Ti 材料作为阳极，同时分别采用锌、不锈钢、石墨和 RuO2/Ti 作为阴极，采用气相色谱（GC）分析了 HCB 在不同阴极上的电化学产物。结果表明，阴极材料显著影响 HCB 的脱氯效率，HCB 的降解是在阴极上发生的还原脱氯。在还原过程中，各种中间产物如五氯苯、四氯苯和三氯苯上的氯原子逐个被取代；当锌作为阴极时，得到三氯苯。HCB 的快速脱氯表明，采用锌或不锈钢作为阴极的电化学方法可用于修复环境中的多氯芳烃。提出了不锈钢阴极脱氯 HCB 的方法。
