Degradation of 2,4-dichlorophenol with a novel TiO_2/Ti-Fe-graphite felt photoelectrocatalytic oxidation process

作     者：ZHAO Bao-xiu LI Xiang-zhong WANG Peng 

作者机构：School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China. Department of Civil and Structural Engineering The Hong Kong Polytechnic of University Hunghom Kowloon Hong Kong China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2007年第19卷第8期

页      面：1020-1024页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：Project supported by the Hong Kong Government Research Grant Committee(RGC No.PolyU5148/03E) 

主　　题：2,4-dicholrophenol TiO2 photoelectrocatalytic hydrogen peroxide E-Fenton 

摘      要：Degradation of 2,4-dichlorophenol （2,4-DCP） was studied in a novel three-electrode photoelectrocatalytic （PEC） integrative oxidation process, and the factors influencing the degradation rate, such as applied current, flow speed of O2, pH, adscititious voltage and initial 2,4-DCP concentration were investigated and optimized. H2O2 was produced nearby cathode and Fe^2＋ continuously generated from Fe anode in solution when current and O2 were applied, so, main reactions, H2O2-assisted TiO2 PEC oxidation and E-Fenton reaction, occurred during degradation of 2,4-DCP in this integrative system. The degradation ratio of 2,4-DCP was 93% in this integrative oxidation process, while it was only 31% in E-Fenton process and 46% in H2O2-assisted TiO2 PEC process. So, it revealed that the degradation of 2,4-DCP was improved greatly by photoelectrical cooperation effect. By the investigation of pH, it showed that this integrative process could work well in a wide pH range from pH 3 to pH 9.