沸石负载TiO_2光催化降解造纸废水研究  

Study on Photocatalytic Degradation of Papermaking Wastewater by TiO_2-coated Natural Zeolite

作　　者：石中亮[1] 姚淑华[1] 华丽[1] 

机构地区：[1]沈阳化工学院应用化学系,辽宁沈阳110142

出　　处：《非金属矿》2007年第4期46-49,共4页Non-Metallic Mines

基　　金：辽宁省教育厅科学技术基金资助项目(20040284);沈阳化工学院博士启动基金资助项目(20063202)

摘　　要：以钛酸四丁酯和乙醇为原料,采用溶胶-凝胶(sol-gel)法制备以天然沸石为载体的负载型TiO2光催化剂,利用XRD、SEM对其进行结构表征。研究结果表明:在造纸废水pH为4.0、光照时间8.0h、光催化剂用量50g/L的条件下,光催化降解效果最佳,COD去除率可达82%。光催化剂重复利用四次,其光催化活性变化不大。通过对造纸废水光降解过程的动力学拟合,得出其光降解反应为准一级反应。Using tetrabutyl titanate and ethanol as reaction raw materials, the photocatalyst of TiO2-coated natural zeolite was prepared by solgel method. The experimental techniques of XRD and SEM were used to characterize the prepared TiO2-coated photocatalyst. The experimental results showed that the removal rate of COD from papermaking wastewater can reach 82% at the conditions of pH value 4.0, radiation time 8.0h, amount of catalyst 50g/L. The photocatalyst had a high activity after reused four times, Kinetics analysis showed that the photocatalytic degradation reaction of papermaking wastewater can be described by a pseudo-first order rate equation.

关 键 词：二氧化钛 天然沸石 光催化剂 造纸废水 降解 

分 类 号：X703[环境科学与工程—环境工程]