| 纳米TiO_2光催化降解印染废水的研究 |
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| 引用本文： | 郑先君,姜巧娟,魏丽芳,付永,张治红,谢冰.纳米TiO_2光催化降解印染废水的研究[J].环境科学与技术,2009,32(4). |
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| 作者姓名： | 郑先君 姜巧娟 魏丽芳 付永 张治红 谢冰 |
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| 作者单位： | 郑州轻工业学院河南省表界面重点实验室,河南,郑州,450002 |
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| 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.%。
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| 关 键 词： | TiO2 光催化 降解 印染废水 |
Photocatalytic Degradation of Dyeing Wastewater by Nano-TiO_2 Photocatalyst |
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| ZHENG Xian-jun,JIANG Qiao-juan,WEI Li-fang,FU Yong,ZHANG Zhi-hong,XIE Bing.Photocatalytic Degradation of Dyeing Wastewater by Nano-TiO_2 Photocatalyst[J].Environmental Science and Technology,2009,32(4). |
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| Authors: | ZHENG Xian-jun JIANG Qiao-juan WEI Li-fang FU Yong ZHANG Zhi-hong XIE Bing |
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| Institution: | Henan Provincial Key Laboratory of Surface and Interface Science;Zhengzhou University of Light Industry;Zhengzhou 450002;China |
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| Abstract: | 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 re... |
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| Keywords: | TiO2 |
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