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不同活性物种对光催化降解水中邻苯二甲酸二甲酯动力学的贡献研究
引用本文:安继斌,冯辉霞,阳海,高艳蓬,李桂英,安太成.不同活性物种对光催化降解水中邻苯二甲酸二甲酯动力学的贡献研究[J].生态环境,2010,26(6):1369-1373.
作者姓名:安继斌  冯辉霞  阳海  高艳蓬  李桂英  安太成
作者单位:1. 兰州理工大学石油化工学院,甘肃,兰州,730050;中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东省环境资源利用与保护重点实验室,广东,广州,510640
2. 兰州理工大学石油化工学院,甘肃,兰州,730050
3. 中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东省环境资源利用与保护重点实验室,广东,广州,510640;中国科学院研究生院,北京,100049
4. 中国科学院广州地球化学研究所有机地球化学国家重点实验室,广东省环境资源利用与保护重点实验室,广东,广州,510640
基金项目:中国科学院知识创新工程重要方向项目,国家自然科学基金项目,有机地球化学国家重点实验室专项资金项目 
摘    要:采用光催化氧化技术对邻苯二甲酸二甲酯(DMP)进行降解研究,并在基础上考察了催化剂量,溶液pH和溶液初始浓度对降解速率的影响。且采用Langmuir-Hinshelwood动力学模型来描述DMP的光催化降解,研究表明DMP的光催化降解符合假一级动力学。系统研究了光催化降解DMP过程中不同活性物种对光催化反应速率的贡献,实验结果表明:在TiO2光催化降解DMP的过程中,?OH为主要的活性物种,其对DMP的降解速率贡献高于94%,而其它活性物种(ecb-,hvb+,O2?-和H2O2)对光催化贡献较小。

关 键 词:光催化  邻苯二甲酸二甲酯  降解  动力学  活性物种

The contribution of different reactive species to the kinetics of photocatalytic degradation of dimethyl phthalate in water
AN Jibin,FENG Huixia,YANG Hai,GAO Yanpeng,LI Guiying,AN Taicheng.The contribution of different reactive species to the kinetics of photocatalytic degradation of dimethyl phthalate in water[J].Ecology and Environmnet,2010,26(6):1369-1373.
Authors:AN Jibin  FENG Huixia  YANG Hai  GAO Yanpeng  LI Guiying  AN Taicheng
Institution:1. School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; 2. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;3. Graduate School of Chinese Academy of Sciences, Beijing 100049, China
Abstract:Photocatalytic degradation of dimethyl phthalate (DMP) has been investigated in TiO2 aqueous suspension, and the effects of the catalyst amount, initial pH value, and initial concentration on the photocatalytic degradation rates were also measured. The results show that the disappearance of DMP follows approximately a pseudo-first-order kinetics by using Langmuir-Hinshelwood kinetic model to describe the photocatalytic degradation of DMP. The further experiments of the reactive oxygen species (ROSs) indicated that ?OH radical were responsible for the major degradation of DMP, and its contribution from 94%, while other ROSs (ecb-, hvb+, O2- and H2O2) play a minor contribution to the degradation rate.
Keywords:photocatalysis  dimethyl phthalate  degradation  kinetics  reactive oxygen species
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