Fenton试剂降解垃圾渗滤液中溶解性有机物的试验研究

Experimental study on degradation of DOM in landfill leachate by Fenton reagent

采用Fenton试剂处理垃圾渗滤液,通过正交试验得出了各因素在Fenton试剂氧化效果中的影响程度依次为:c(Fe2+)>c(H2O2)>反应时间>pH值;试验结果表明:在pH=4,c(Fe2+)=0.04 mol/L,c(H2O2)=0.10mol/L,反应时间为120 min的条件下,对CODCr、TOC、DOC和UV254的去除率分别为:57.04%、35.01%、36.56%、62.73%;Fenton试剂反应后,渗滤液中有机物组分含量发生了较大变化,腐殖质(HS)含量下降,亲水性有机物(HyI)成为渗滤液溶解性有机质(DOM)的主要成分。

Fenton reagent was used to treat landfill leachate.Through the orthogonal test,it could be found that,the influencing degree of different factors on oxidation performance of Fenton reagent was in the descending order of c（Fe2＋）,c（H2O2）,reaction time,pH value.The result of the test showed that,when the pH value was 4,the c（Fe2＋） was 0.04 mol/L,the c（H2O2） was 0.10 mol/L,the reaction time was 120 min,the removal rates of CODCr,TOC,DOC and UV254 were 57.04%,35.01%,36.56% and 62.73% respectively;after the Fenton reagent reaction,the organic composition of landfill leachate changed greatly,the content of humic substances（HS） decreased,while the hydrophilic organic matter（HyI） became the main composition of dissolved organic matter（DOM）.