Electrochemical degradation of pentachlorophenol using a palladium modified gas-diffusion electrode

被引：0

作者：

Wang, Hui ^{[1
]}

Wang, Jian Long ^{[1
]}

机构：

[1] Beijing Forestry Univ, Sch Environm Sci & Engn, Beijing 100083, Peoples R China

来源：

ADVANCES IN CHEMICAL TECHNOLOGIES FOR WATER AND WASTEWATER TREATMENT | 2008年

关键词：

chlorophenol; electrochemical oxidation; gas-diffusion cathode; Pd/C catalyst; priority pollutant;

D O I：

暂无

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Pd/C catalyst was prepared by hydrogen reduction method and used for the Pd/C gas-diffusion electrode. It was characterized by cyclic voltammetry (CV) technique. The electrochemical degradation of pentachlorophenol (PCP) was investigated in a diaphragm electrolysis' device, feeding firstly with hydrogen gas then with air, using the Pd/C gas-diffusion electrode and the carbon/polytetrafluoroethylene (C/PTFE) gas-diffusion electrode as the cathode, respectively. The results indicated that the Pd/C gas-diffusion cathode can not only reductively dechlorinate PCP by feeding hydrogen gas, but also accelerate the two-electron reduction of O-2 to hydrogen peroxide (H2O2) by feeding air. Therefore, both the removal efficiency and the dechlorination degree of PCP exceeded 80% after 120 min, and the average removal efficiency of PCP in terms of total organic carbon (TOC) exceeds 75% after 200 min by using Pd/C gas-diffusion cathode, which was better than that of the C/PTFE gas-diffusion cathode. High-performance liquid chromatography (HPLC) allows identifying phenol as the dechlorination product.

引用

页码：823 / 831

页数：9

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