中文摘要：

采用序批次吸附试验,研究了不同填埋年限（0、4～5、12a）垃圾渗滤液中的DOM对土壤吸持重金属Cd^2＋、Pb^2＋的影响.结果表明,垃圾渗滤液中的DOM能促进土壤对重金属Cd^2＋、Pb^2＋的吸附.在有垃圾渗滤液DOM存在的条件下,Cd^2＋、Pb^2＋的吸附等温线可用Freundlich方程拟合（R2＞0.94）,土壤对Cd^2＋、Pb^2＋的吸附量比对照处理（无垃圾渗滤液DOM）分别高1.13～1.42倍和1.09～1.84倍,填埋年限长的垃圾渗滤液较之填埋年限短的渗滤液对土壤吸附Cd^2＋、Pb^2＋的影响强烈.在Cd^2＋、Pb^2＋初始浓度相同时,潮土较红壤具有更高的吸持能力,并且随体系pH的增高,其吸持量增加.

英文摘要：

Batch adsorption experiments were carried out to investigate effect landfill sites（0,4 ～ 5,12y） on the sorption of Cd^2＋ , Pb^2＋ in the acidic and of dissolved organic matter（ DOM ） of landfill lcachate derived from different calcareous soil. The results showed that the snrption of Cd^2＋ ,Pb^2＋ in soils was enhanced in the presence of landfill-leaehate DOM . The Sorption isotherm of Cd^2＋ ,Pb^2＋ in soils in the presence of different landfill leaehate DOM could be described well by the Frcnudlich eqation （R2 〉 0.94）, and the Sorption of Cd^2＋ and Pb^2＋ in soils were 1.13 to 1.42 and 1.09 to 1.84 times higher than the control in absence of landfill leachate DOM, respectively. At the same initial concentration of Cd^2＋ and Pb^2＋, acidic soil demonstrated much less ability to retain the Cd^2＋ and Pb^2＋than calcareous soil due to much lower pH in the former, and landfill-leachate of longer landfill age enhanced sorption of Cd^2＋ ,Pb^2＋in soils in comparison with the shorter the landfill age of landfill-leachate. The results showed that in the presence of landfill leachate DOM, increase of Cd^2＋, Pb^2＋ sorption capacity in soils was obvious with an increase in pH.