采用TiO_2光催化剂对河水中污染物进行光催化降解  

Photocatalytic Degradat of Pollutant from River by TiO_2 as Photocatalyst

作　　者：崔玉民[1] 

机构地区：[1]阜阳师范学院化学系,安徽阜阳236032

出　　处：《河南科技大学学报（自然科学版）》2003年第1期94-97,104,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：安徽省教育厅自然科学基金资助项目 (2 0 0 2kj2 3 5 )

摘　　要：用光催化剂TiO2 对西清河废水进行了废水处理研究。实验结果表明 ,随着催化剂用量的增加 ,COD、色度的去除率逐渐增大 ,但当其用量超过 0 .5g时 ,COD、色度的去除率增加缓慢 ,超过 0 .6g时开始下降 ;当pH <6 .5时 ,随着pH值降低 ,当pH >6 .5时 ,随着pH值升高 ,COD、色度去除率均降低 ;随着光照时间延长 ,COD、色度去除率逐渐升高 ,但当光照时间超过 10h后 ,COD、色度去除率升高幅度非常缓慢。当催化剂用量为 0 .6g、pH =6 .5、光照 12h时 ,西清河废水的COD、色度去除率分别达到 75 .0 %、78.5 %。In this article,waste water from Xiqing river was treated by TiO 2 as photocatalyst. The experimental results indicate :(1)the removal rate of COD and colority of waste water rose gradually along with quantity of catalyst,but increased slowly with the quantity over 0.5g ,and started to cut down with the quantity over 0.6g ;(2)the removal rate of COD and colority of waste water lowered as pH<6.5 in pace with pH cuting down,and pH>6.5,along with pH rising;(3) the removal rate of COD and colority of waste water rose gradually along with prolonging of illumination time,but increased much slowly with illumination time over 10h. The removal rate of COD and colority of waste water can reach 75.0% and 78.5% respectivesly with 0.6g photocatalyst, pH=6.5,illumination time 12h.

关 键 词：光催化剂 废水处理 二氧化钛 降解 反应机理 COD 色度去除率 

分 类 号：X703[环境科学与工程—环境工程]