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| Degradation of 2,4-dichlorophenol with a novel TiO2/Ti-Fe-graphite felt photoelectrocatalytic oxidation process | |
| 作者姓名： | ZHAO Bao-xiu LI Xiang-zhong WANG Peng |
| 作者单位： | ZHAO Bao-xiu~(1，2) LI Xiang-zhong~1 WANG Peng~(1，*) 1.School of Municipal and Environmental Engineering，Harbin Institute of Technology，Harbin 150090，China. 2.Department of Civil and Structural Engineering，The Hong Kong Polytechnic of University，Hunghom，Kowloon，Hong Kong，China |
| 基金项目： | Project supported by the Hong Kong Government Research Grant Committee(RGC No.PolyU5148/03E). |
| 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 O_2,pH,adscititious voltage and initial 2,4-DCP concentration were investigated and optimized.H_2O_2 was produced nearby cathode and Fe~(2 )continuously generated from Fe anode in solution when current and O_2 were applied,so,main reactions,H_2O_2-assisted TiO_2 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 H_2O_2-assisted TiO_2 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. |
| 关 键 词： | 电极 过氧化氢 氧化过程 二氧化钛 |
| 收稿时间： | 27 September 2006 |
| 修稿时间： | 2006-09-27 |
Degradation of 2,4-dichlorophenol with a novel TiO2/Ti-Fe-graphite felt photoelectrocatalytic oxidation process |
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| ZHAO Bao-xiu,LI Xiang-zhong,WANG Peng.Degradation of 2,4-dichlorophenol with a novel TiO2/Ti-Fe-graphite felt photoelectrocatalytic oxidation process[J].Journal of Environmental Sciences,2007,19(8):1020-1024. | |
| Authors: | ZHAO Bao-xiu LI Xiang-zhong and WANG Peng |
| Institution: | 1. 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 2. Department of Civil and Structural Engineering, The Hong Kong Polytechnic of University, Hunghom, Kowloon, Hong Kong, China 3. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China |
| Abstract: | 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 Fe2 continuously generated from Fe anode in solution when current and O2 was 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. |
| Keywords: | 2 4-dicholrophenol TiO2 photoelectrocatalytic hydrogen peroxide E-Fenton Degradation novel process work wide range investigation improved cooperation effect system during reaction continuously anode solution cathode concentration voltage initial |
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