土壤对垃圾渗滤液常规离子吸附作用实验研究——以淮南大通垃圾填埋场为例

选定淮南大通垃圾填埋场土壤与垃圾渗滤液,自行设计填埋场土壤与渗滤液间的常规离子吸附作用实验。实验研究结果表明：土壤对Ca2＋、Mg2＋、SO42-的吸附率表现为负吸附,吸附率绝对值较大,并随渗滤液的稀释倍数（n）的增大而减小,呈对数关系;土壤对Cl-的吸附率表现为正吸附,吸附率较小,并随渗滤液的稀释倍数（n）的增大而增大不明显,呈直线关系;深部土壤对不同稀释倍数的渗滤液中的Ca2＋、Mg2＋、SO24-的吸附能力大于浅部土壤,但深部土壤对不同稀释倍数渗滤液中的Cl-的吸附能力与浅部土壤对不同稀释倍数渗滤液中的Cl-的吸附能力几乎一致,都表现为正吸附。

Study on Soil's Aability to Adsorb Conventional Ion in Landfill Leachate--Taking Datong Landfill in Huainan for Example

We selected the soil and leachate of Datong landfill in Huainan, and designed adsorption experiments on landfill＇s soil and leaehate for conventional ions by ourselves. The resuhs showed that the adsorption rates of Ca2＋ , Mg2＋ and SO4^2- on soil manifested as negative adsorption and its absolute values was larger, deereased with the increase.of leaehate＇s dilution multiple（ n）, having a logarithmic relation ; and that the adsorption rate of CI - on soil manifested as positive adsorption and its absolute value was smaller, increased not obviously with the increase of leaehate＇s dilution muhiple（n） , having a linear relation. Deep soil＇s ability to adsorb Ca2＋ , Mg2＋ and SO4^2- in different dilution multiple leaehate was larger than shallow soil＇s,while deep soil＇s ability to adsorb Cl^- in different dilution multiple leachate was almost eonsistent with shallow soil＇s, manifested as positive adsorption.