光助Fenton法氧化垃圾渗滤液中有机物的研究  

Degradation of Organic Contaminant in Landfill Leachate by Photo-Fenton Process

作　　者：郑怀礼[1] 潘云霞[2] 李丹丹[1] 吴幼权[1] 

机构地区：[1]重庆大学教育部三峡库区生态环境重点实验室,重庆400045 [2]西南大学工程技术学院,重庆400716

出　　处：《光谱学与光谱分析》2009年第6期1661-1664,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20777095);重庆市自然科学基金重点项目(CSTC-2006BA7029);重庆大学研究生科技创新基金(200706A1A0110231)资助

摘　　要：根据日光辐射强度随时间的变化规律,选择光强最大时间区域进行试验,研究了不同Fe2+/H2O2、pH值、Fenton试剂用量对垃圾渗滤液色度去除率和UV254的影响,利用光谱扫描研究了垃圾渗滤液在光助Fenton技术处理前后有机物的变化情况。研究结果表明,光助Fenton技术对垃圾渗滤液的色度有较好的去除效果。光助Fenton技术处理垃圾渗滤液的优化条件是:Fe2+/H2O2为1/95,Fe2+浓度为5.00 mmol.L-1,H2O2浓度为5.70×102mmol.L-1,pH值为2.5。论文还对光助Fenton技术处理垃圾渗滤液的动力学进行了分析。研究结果显示,光助Fenton技术对垃圾渗滤液中有机物的降解符合二级反应动力学,反应方程为dc/dt=-4.34[c]1.92;光谱扫描结果表明,光助Fenton技术对垃圾渗滤液中的有机物有很好的去除效果。In the present work, the treatment of landfill leachate was studied by photo-Fenton process. All photocatalytic experiments were carried out under similar conditions on July or August sunny days between 12 a.m. and 14 p.m. in Chongqing based on the change in solar light intensity with time. The effect of operating conditions such as Fe/H2O2, pH value and Fenton＇s reagent dosage on color removal and UV2s4 was investigated. The UV-- Vis absorption spectra of 1.00 × 10^3 mg · L^-1 landfill leachate were considered before and after photo-Fenton experiment. The experiment result indicated that photo-Fenton process can effectively remove color. The oxidation of organic materials in the leachate was pH dependent and the optimal pH was 2. 5. The favorable Fe^2＋ to H2O2 molar ratio was 1/95. The optimal conditions in this research were Fe^2＋ concentration of 5.00 mmol · L^-1 and H2O2 concentration of 5.70× 10^2 mmol· L^- 1. Meanwhile, the analysis of reaction kinesies was carried out in the research. Second-order kinetic was observed for the degradation of landfill leaehate, and the rate equation of photo-Fenton process was -dc/dt=-4. 34[c]1.92. The result of UV-Vis spectra of landfill leachate showed that photo-Fenton process is an effective method for removal of organic compounds.

关 键 词：光助Fenton技术 垃圾渗滤液 色度去除率 UV254 动力学 

分 类 号：O643[理学—物理化学]