The electrochemical hydrodechlorination of 2, dichlorophenol in water and its improvement by combination with chemical catalytic reduction
The performance of electrochemical hydrodechlorination of 2, 4-dichlorophenol (2, 4-DCP) in water using Pd-modified Cu electrode (Pd/Cu) was evaluated in a batch experiment. The results showed that, at an applied current density of 1.5 mA/cm2, 2, 4-DCP concentration decayed rapidly from 49.99 mg/L to 0.40 mg/L after 120 min with consecutive change of intermediate 2-CP. Phenol was formed as the main final product. Base on the above results, a combined electrochemical with chemical catalytic reduction process for 2, 4-DCP was put forward and improved. In this combined process, 2, 4-DCP was reduced on the surface of both cathode (Pd/Cu) and catalyst (hydrotalcite-supported Pd-Cu catalyst) without addition of a reducing agent, which may further enhance removal efficiency for 2, 4-DCP and intermediate 2-CP. Dissolved oxygen in water decreased 2, 4-DCP reduction efficiency, which was attributed to the competitive reduction of O2 with 2, 4-DCP. The combined process exhibited excellent stability for hydrodechlorination of 2, 4-DCP.
2 4-dichlorophenol electrochemical chemical catalytic combined process influence factors
Ying Wang Yuansheng Pei Yang Li Jinxian Huo
State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University School of Chemistry and Chemical Engineering Shanxi Datong University Datong,P.R.China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）