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

Yin Xiaoxi(School of Resources and Environmental Eng.,Hefei Univ.of Technology,Hefei 230009,China)  
We selected the soil and leachate of Datong landfill in Huainan,and designed adsorption experiments on landfill's soil and leachate for conventional ions by ourselves.The results showed that the adsorption rates of Ca2+,Mg2+ and SO2-4 on soil manifested as negative adsorption and its absolute values was larger,decreased with the increase of leachate's dilution multiple(n),having a logarithmic relation;and that the adsorption rate of Cl-on soil manifested as positive adsorption and its absolute value was smaller,increased not obviously with the increase of leachate's dilution multiple(n),having a linear relation.Deep soil's ability to adsorb Ca2+,Mg2+ and SO2-4 in different dilution multiple leachate was larger than shallow soil's,while deep soil's ability to adsorb Cl-in different dilution multiple leachate was almost consistent with shallow soil's,manifested as positive adsorption.
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