作　　者： ; ;

机构地区： 南京农业大学资源与环境科学学院环境工程系

出　　处： 《东华理工学院学报》 2006年第2期171-175,共5页

摘　　要： 采用土柱淋滤试验研究了不同填埋年限的垃圾渗滤液DOM在土壤中垂直迁移及其对土壤重金属Pb淋滤溶出的影响.结果表明,不同填埋年限（0.4～5.12 a）的垃圾渗滤液DOM在土壤中垂直向下的迁移速率存在差异,填埋时间短的垃圾渗滤液DOM在土壤中迁移性较强.与对照相比（不加渗滤液DOM）,垃圾渗滤液处理对红壤中土壤重金属Pb的累积解吸率高74.25%;在潮土上高-38.79%,且垃圾填埋年限中期的渗滤液DOM对土壤重金属的溶出影响更显著,说明垃圾渗滤液DOM进入土壤环境对重金属的迁移有促进作用. Soil column trial reveales that vertical downwards migration of landfill leachate DOM in soil is dependent on their ages. The younger landfill leachate DOM, the higher mobilization they had. As a result, a higher mobilization of landfill leachate DOM would facilitate the translocation of heavy metal in soils. It is shown that the average dissolution rates of Pb in the contaminated acidic soil in the presence of landfill leachate DOM are 74.25% times higher than the control, respectively, and -38.79% times higher than the control in the contaminated calcareous soil. It implies that landfill leachate DOM would facilitate toxic metal transportation in the leachate contaminated soils.

关 键 词： 垃圾渗滤液 污染土壤 迁移性

领　　域： [环境科学与工程]