| 负载型TiO_2光催化降解垃圾渗滤液的动力学研究 |
| |
| 引用本文： | 刘春英.负载型TiO_2光催化降解垃圾渗滤液的动力学研究[J].安徽农业科学,2008,36(24). |
| |
| 作者姓名： | 刘春英 |
| |
| 作者单位： | 江西财经大学资源与环境管理学院,江西南昌,330032 |
| |
| 基金项目： | 国家教育部《高等学校骨干教师资助计划》资助项目 |
| |
| 摘 要： | 目的]探讨玻璃负载TiO2光催化降解垃圾渗滤液的影响因素及反应动力学。方法]选取一定浓度的垃圾渗滤液(pH值为8左右,COD值为300~600 mg/L)600 ml,将催化剂-纳米TiO2/玻璃筒膜插入溶液中,通入空气,将400 W的高压汞灯插入筒内进行照射。研究反应时间、进水浓度、pH值、光源强度等因素对垃圾渗滤液CODCr和色度去除率的影响。结果]光强越大、光照时间越长,催化效果越好;溶液的初始浓度越大,降解率越低;反应液在偏酸、偏碱的条件下有利于光催化氧化反应进行。动力学研究表明,垃圾渗滤液光催化降解反应符合一级动力学规律。反应速率方程为:Ct=C0e-0.023 8 tmg/L(初始CODCr为472.7 mg/L)。结论]以负载型TiO2膜作光催化剂降解垃圾渗滤液是可行的。
|
| 关 键 词： | 光催化降解 二氧化钛 垃圾渗滤液 动力学 |
Study on Kinetics of Photodegradation of Supported TiO2 on Landfill Leachate |
| |
| LIU Chun-ying.Study on Kinetics of Photodegradation of Supported TiO2 on Landfill Leachate[J].Journal of Anhui Agricultural Sciences,2008,36(24). |
| |
| Authors: | LIU Chun-ying |
| |
| Abstract: | Objective] The study aimed to discuss the influencing factors and reaction kinetics of photodegradation of TiO2 supported on glass on the landfill leachate were studied.Method] 600 ml landfill leachate(pH of about 8,COD of 300～600 mg/L) with a certain concn.was taken,and the catalyst of nm TiO2 /glass tube membrane was inserted in it.After the air was pumped in,the high pressure mercury lamp with 400W was inserted in the tube to irradiate.The effects of the factors such as reaction time,influent concentration,pH value and intensity of light source on the CODCr and chroma removal rate of the landfill leachate were studied.Result] The higher the light intensity was and the longer the illumination time was,the better the catalytic effect was.The higher the initial concentration of the solution was,the lower the degradation rate was.It was beneficial for carrying through the photocatalysis reaction when the reaction solution was under the deflecting acid and alkali conditions.The study of kinetics showed that the reaction of photodegradation on landfill leachate conformed to first-order kinetics.The reaction rate equation was Ct=C0e-0.023 8t mg/L(the initial CODCr was 472.7 mg/L).Conclusion] It was feasibile of using supported TiO2 membrane as photocatalyst for degrading landfill leachate. |
| |
| Keywords: | Photodegradation TiO2 Landfill leachate Kinetice |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
