垃圾渗滤液中DEHP与DBP的迁移演化规律研究

采用一维土柱下渗实验和垂向入渗模型相结合的方式，研究垃圾渗滤液中邻苯二甲酸二乙基己基酯（DEHP）和邻苯二甲酸二正丁酯（DBP）在土壤中的垂向迁移演化规律。结果表明：原状土和混有石英砂土的土柱对DBP的吸附能力均强于DEHP，而混有石英砂的土柱中DEHP、DBP均出现不同程度的穿透现象，且DEHP的穿透速度比DBP要快2倍；做或不做防渗处理，DEHP和DBP渗出量均呈前期快速增长而后期归于稳定的趋势，防渗对DBP效果较DEHP好；垂向入渗模型与一维土柱实验结果一致，该模型可用于其他区域有机污染物在土壤中垂向迁移的研究。

Study on Migration and Evolution of DEHP and DBP in Landfill Leachate

The vertical migration and evolution of di-(2-ethylhexyl) phthalate (DEHP) and di-n-butyl phthalate (DBP) in landfill leachate were studied by one-dimensional soil column infiltration experiment combined with vertical infiltration model. The results showed that the adsorption capacity of undisturbed soil and soil column mixed with quartz sand for DBP were stronger than that for DEHP. Both DWHP and DBP in the soil column mixed with quartz sand had different degrees of penetration, and the penetration time of DEHP was two times faster than that of DBP. With or without anti-seepage treatment, the seepage of DEHP and DBP increased rapidly in the early stage and tended to be stable in the late stage. The anti-seepage effect on DBP was better than that on DEHP. The results by vertical infiltration model was consistent with those by one-dimensional soil column experiments. This model could be used to study the vertical migration of organic pollutants in soil in other areas.