摘要
采用溶胶-凝胶法制备了纳米TiO2光催化剂,并用X射线衍射仪和扫描电镜对制备的TiO2进行结构表征。详细考察了照射时间、废水初始浓度、TiO2用量、pH、光源种类、H2O2、H2O2/Fe2+对实际印染废水的降解效果。研究结果表明:当反应时间为3h时,印染废水COD去除率为95.9%,脱色率达100%;印染废水的脱色率和COD去除率与印染废水的初始浓度成反比关系;TiO2光催化剂最佳用量为80mg/L;印染废水最佳降解的pH为6.0。当添加辅助氧化剂H2O2用量为600mg/L时,能进一步提高印染废水的COD去除率,特别是H2O2和Fe2+共同作用下,COD去除率达到99.%。
Nano-TiO2 photocatalyst was prepared by sol-gel method. The structure of prepared TiO2 was characterized by X- ray diffraction and scanning electron microscope. Effect of illumination time, initial wastewater concentration, TiO2 amount, pH, different lamphouse, H2O2 and H2O2/Fe2＋ addition on degradation of dyeing wastewater were investigated. Experimental results showed that COD removal rate reached 95.9% and decoloration rate reached 100% when reaction time was 3h. The degradation rate of wastewater had negative relationship with initial wastewater cohcentration. The best TiO2 addition was 80mg/L and optimum pH value was 6.0.With 600mg/L of H2O2 dosage, COD removal efficiency of wastewater could be further enhanced. COD removal efficiency reached 99.0% by co-action of H2O2 and Fe2＋.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第4期159-162,共4页
Environmental Science & Technology
关键词
TIO2
光催化
降解
印染废水
TiO2
photocatalysis
degradation
dyeing wastewater
作者简介
郑先君（1969-），男，副教授，博士，主要从事废水处理、清洁能源制备等方面的研究工作，（手机）13838319751（电子信箱）xjzheng@zzuli.edu.cn。
