PEG改性Bi-PbO_2电极对茜素绿的电催化降解作用  

Electrocatalytic Degradation of Alizarin Green by PEG Modified Bi-PbO_2 Electrode

作　　者：蔡成杰[1] 杨卫华[1] 杨武涛[1] 林小燕[1] 

机构地区：[1]华侨大学材料科学与工程学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2014年第2期165-168,共4页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(21103055);华侨大学基本科研业务专项基金资助项目(JB-ZR1139)

摘　　要：利用聚乙二醇(PEG)改性Bi-PbO2电极电催化氧化茜素绿(AG)模拟染料废水,研究初始质量浓度、电流密度和pH值对降解率的影响.结果表明:高电流密度有利于提高降解率,但可能导致较大的能源浪费;高初始质量浓度有利于提高电流利用率;而pH值不是降解率的主要影响因素.利用红外光谱对AG的氧化过程进行研究,表明AG的氧化主要依靠电解产生的·OH,氧化过程经历了苯环开环、断链,并进一步被氧化为CO2和H2O等小分子化合物.化学动力学研究表明,电催化氧化AG过程符合一级反应动力学规律.The polyethylene glycol （PEG） modified Bi-PbO2 electrode was used to investigate the electrode oxidation of dye wastewater simulated by alizarin green （AG）. The influence of initial mass concentration, current density and pH val- ue on the degradation rate was investigated. Results show that high current density will help improve the degradation rate but may lead to a large energy waste; high initial mass concentration is favorable to increase the current utilizatiom while pH value is not the main factors of degradation rate. Infrared spectroscopy was used to a preliminary study of AG oxida- tion process. Results indicate that oxidation of AG relies mainly on electrolysis produced · OH. The oxidation process in- volves benzene open-loop, chain scission, and further oxidized to small molecule compounds such as CO2 and H20. Chemical kinetics study indicates that the electrocatalvtic oxidation ofAG follows first order reaction kinetics law.

关 键 词：茜素绿 PEG-Bi-PbO2电极 电催化氧化 蒽醌染料 一级反应动力学 

分 类 号：X505[环境科学与工程—环境工程]