5种偶氮染料溶液的光催化降解实验  

Research on Photocatalytic Degradation of Five Azo Dyes Solution

作　　者：苗慧[1] 范少华[1] 崔玉民[1] 

机构地区：[1]阜阳师范学院化学系

出　　处：《河南科技大学学报（自然科学版）》2006年第3期93-96,共4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项目(2005KJ136);阜阳师院青年基金项目(2004YQL08)

摘　　要：以TiO2为催化剂,采用中压汞灯为光源对5种偶氮染料溶液进行了光催化降解的实验研究。结果表明,在上述条件下能够使直接R-F,直接黄y-5 GL,直接耐晒翠蓝B-GL,阳离子B-2RL,直接耐晒蓝B-BRL等偶氮染料水溶液降解脱色,染料脱色为动力学一级反应。5种偶氮染料在初始浓度50mg/L,温度201℃下,经20min光照,其脱色率分别为97.01%、97.90%、88.13%、96.95%、95.74%;CODCr去除率分别为58.64%、40.61%、44.60%、44.71%、55.56%。并讨论了pH值、催化剂用量、脱色时间和染料结构等因素对脱色与降解的影响。The photocatalytic degradation of five azo dyes solution is studied.The result shows that the experiment can make azo dyes solution decolor.The reaction is kinetic first-scale reaction.Under the experiment conditions,the decolorization efficiency and removal efficiencies of COD_cr can reach 97% and 40%～60% respectively after reaction for 20 minutes at 201℃.Factors affecting decolorization and degradation,such as pH value,catalyst dosage,decolorizing time and dyestuff structure were discussed.

关 键 词：光催化 TiO2 偶氮染料 降解脱色 印染废水 

分 类 号：X788[环境科学与工程—环境工程]