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漂白废水中氯酚光催化降解及其动力学研究
引用本文:万金泉,马邕文,张勇.漂白废水中氯酚光催化降解及其动力学研究[J].中国造纸学报,2004,19(1):62-65.
作者姓名:万金泉  马邕文  张勇
作者单位:华南理工大学造纸与环境工程学院,广州,510640
摘    要:氯酚是纸浆漂白废水中常含有的有毒、难降解污染物,本文研究了4-氯酚和2,4-二氯酚在负载纳米TiO2膜的反应器中的降解.结果显示,在TiO2和UV同时存在的情况下才能有效地光催化降解废水中的氯酚,光照强度越大,PH值越高,氯酚的去除率也越高;TiO2光催化氧化氯酚水溶液的动力学可以用L-H动力学方程描述,加入少量H2O2,仍遵守一级动力学反应,而且能增大表观一级反应速率常数.

关 键 词:纳米TiO2  光催化  氯酚  动力学
文章编号:1000-6842(2004)01-0062-04
修稿时间:2004年1月13日

Study of Nanometer TiO2 Photocatalytic Degradation of Chlorophenol and Its Kinetics
WAN Jin-quan,MA Yong-wen,ZHANG Yong Papermaking and Environmental Engineering College,South China University of Technology,Guangzhou,Guangdong Province.Study of Nanometer TiO2 Photocatalytic Degradation of Chlorophenol and Its Kinetics[J].Transactions of China Pulp and Paper,2004,19(1):62-65.
Authors:WAN Jin-quan  MA Yong-wen  ZHANG Yong Papermaking and Environmental Engineering College  South China University of Technology  Guangzhou  Guangdong Province
Affiliation:WAN Jin-quan~*,MA Yong-wen,ZHANG Yong Papermaking and Environmental Engineering College,South China University of Technology,Guangzhou,Guangdong Province,510640
Abstract:Chlorophenol is the main toxic organic compound of effluent from pulp mill. The photocatalytic degradation of chlorophenol in wastewater was studied in a self-designed reaction apparatus containing nanometer TiO_2, catalyst. The results showed that the degradation ef- fectively occurs under the co-existence of UV and TiO_2. The photodegradation rate of chlorophenol increases as the light intensity and pH value increase. When the reaction time is 2 hour, the removal rate of 4-CP and 2,4-DCP respectively achieves 73.0% and 54.9%. Photo- catalytic degradation of 4-CP and 2,4-DCP in aqueous solution can be described in langmuir-Hinshelwood kinetics model. With the addi- tion of H_2O_2, it still follows the first order reaction of kinetics and makes their first order rate constants larger.
Keywords:nanometer TiO_2  photocatalysis  chlorophenol  kinetics
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