赤泥制备光催化剂降解染料废水的研究  

Study on Dispose of Dye Wastewater by Photocatalysts Prepared From Red Mud

作　　者：王小华[1] 刘红[1] 周志辉[1] 王翠[1] 陈仕祥[1] 

机构地区：[1]武汉科技大学资源与环境工程学院,武汉430081

出　　处：《工业安全与环保》2012年第11期30-33,共4页Industrial Safety and Environmental Protection

基　　金：湖北省武汉市科技计划项目(200861113462)

摘　　要：以固体废物赤泥为原料,采用酸溶-水热法制备光催化剂,并进行化学成分、紫外-可见漫反射吸收光谱(UV-Vis)等物性测试分析。通过降解甲基橙模拟废水,探讨了制备过程中渣酸比、溶剂、水热反应pH值、水热反应温度等条件对赤泥制光催化剂活性的影响。将最佳条件下制备的光催化剂用于染料废水的处理,结果表明,染料废水COD去除率达到75.23%,出水COD值仅为123.07 mg/L,达到二级排放标准。这为氧化铝厂废渣-赤泥的综合利用提供了一条新思路。The photocatalysts are prepared from red mud by way of hydrothennal method and they am characterized by chemical composition, UV- Vis diffuse reflectance spectroscopy techniques. The effects of ratio of red mud and HNO3,sol- vent, pH value of hydro- thermal reaction, temperature of hydro- thermal reaction on the photocatalytic activity of the photo- catalysts am researched via the photodegradation of methyl orange in aqueous solution. The photocatalysts prepared in the op- timum conditions are used to dispose of dye wastewater. The results show that COD removal rate of dye wastewater could reach 75.23% and COD of effluent is only 123.07 mg/L, reaching the second emission standard. It provides a new idea for the comprehemive utilization of red mud in aluminium factory.

关 键 词：赤泥 光催化活性 脱色率 染料废水 

分 类 号：X703[环境科学与工程—环境工程]