微波/Fenton联用处理垃圾渗滤液的研究  

On Treatment of Landfill Leachate by Microwave/Fenton Process

作　　者：潘云霞[1] 张大明[1] 刘澜 

机构地区：[1]西南大学工程技术学院,重庆400716 [2]重庆市合川区规划局,重庆401520

出　　处：《西南大学学报（自然科学版）》2013年第4期157-161,共5页Journal of Southwest University(Natural Science Edition)

基　　金："十二五"国家科技支撑计划项目(2011BAD15B00);西南大学博士基金项目(SWUB2008065);中央高校基本科研业务费专项资金项目(XDJK2009C003)

摘　　要：采用微波/Fenton联用处理垃圾渗滤液,考察Fenton试剂用量、微波功率和pH值对垃圾渗滤液UV254/UV254o的影响.结果表明,H2O2浓度为855mmol/L,Fe2+浓度为15mmol/L,微波功率为480W,pH值为2.5,微波作用时间为120s时,微波/Fenton联用对垃圾渗滤液中难降解有机物有较好的去除效果.同时,论文还对微波/Fenton联用处理垃圾渗滤液的作用机理进行了探讨.结果表明,温度对微波/Fenton联用处理垃圾渗滤液有明显影响,升高温度能增加Fenton试剂对有机物的去除效果;不同的热效应产生方式对垃圾渗滤液中有机物的去除效果不同,单独微波作用对垃圾渗滤液有机物去除率最低,微波/Fenton联用对垃圾渗滤液中有机物的去除率和去除速率高于Fenton反应,在微波/Fenton反应中,不仅微波的热效应对Fenton试剂有强化作用,而且,微波的电磁效应也发挥了作用.The treatment of landfill leachate has been carried out by microwave/Fenton process. The effect of operating conditions such as Fenton＇s reagent dosage, microwave powers and pH value on UV254/UV254 was investigated. The experiment results indicate that microwave/Fenton process can effectively remove refractory contaminants under the optimal conditions with H2O2 concentration of 855 mmol/L, Fe2＋ concentration of 15 mmol/L, microwave powers of 480 W, pH value of 2.5 and 120 s of microwave reaction time. Meanwhile, the degradation mechanism of landfill leachate by microwave/Fenton process has also been studied. The results show that increasing temperature has a significant improvement for the removal of refractory contaminants. Thermal effects produced by different methods have various effects on degra- dation of refractory contaminants. The removal rate and efficiency caused by Microwave/Fenton process are higher than that of Microwave process or Fenton reagent. Not only the thermal effect can enhance Fenton reaction, but also electromagnetic effect of microwave has a positive role in degradation of refractory contaminants.

关 键 词：垃圾渗滤液 微波/Fenton联用 UV254/UV254o 难降解有机物 反应机理 

分 类 号：X703.1[环境科学与工程—环境工程]