偏电压对Ti／TiO_2光电催化氧化富里酸的影响  

POTENTIAL BIAS ON THE PHOTOELECTROCATALYTIC DEGRADATION OF FULVIC ACID

作　　者：季民[1] 金洛楠 傅剑锋[1] 李湘中[3] 

机构地区：[1]天津大学环境科学与工程学院,天津300072 [2]绍兴市水务集团,绍兴312000 [3]香港理工大学土木与结构系

出　　处：《环境化学》2006年第2期145-148,共4页Environmental Chemistry

摘　　要：采用光电催化反应器对水中天然有机物富里酸(FA)进行降解试验,考察了外加阳极偏电压对光电催化反应器降解富里酸的影响．结果表明,当外加电压为1．2V时,具有最佳的UV254和有机碳TOC去除率,当反应时间为2h时,富里酸的UV254和总有机碳TOC的去除率分别为77．4％和45．4％．另外,在反应初期(前1h内)富里酸光电催化反应动力学常数主要受外加偏电压的影响．A new photoelectrocatalytic reactor was adopted to investigate the external anodic potential affecting the degradation of natural organic matter-fulvic acid. The results showed that the remove of UV254 and TOC reached maximum while the electrical bias applied is 1.2V. The remove of UVE54and TOC is 77.4% and 45.4% respectively after reacting two hours. Experimental results indicated that the kinetic of degradation of natural organic matter-fulvic acid by photoelectrocatalytic reactor was highly effeeted by electrical bias applied at early reaction （before an hour）.

关 键 词：光电催化 Ti/TiO2电极 富里酸 外加偏电压 

分 类 号：X132[环境科学与工程—环境科学]