山西三交区块包气带土壤阻隔能力研究

目的]研究山西省三交地区包气带土壤对地下水的阻隔能力。方法]采用土柱淋滤,对排采水净化过程进行模拟。结果]由降水引起土壤初始含水量对溶解性总固体的吸附过程产生影响,针对研究区排采水的日排放量,包气带吸附量未耗尽;土层厚度与F-的吸附容量及达到平衡所需的时间呈正相关,并由等温吸附曲线得出研究区包气带对F-的最大吸附量为2.85～2.91mg/kg;土壤对NH4的吸附受土层厚度和包气带土壤中本底值影响,还与包气带土壤中本底值有关。结论]该研究为防渗措施不到位的储水池的改善提供一定的数据资料。

Study on Soil Barrier Ability of Unsaturated Zone about San Jiao Sector in Shanxi Province

Objective] The research aimed to study the soil barrier ability to protect groundwater in San Jiao sector. Method] Purification process of drain off water and collecting water was simulated with column leaching. Result] The soil initial water content caused by precipitation changed the adsorption process about TDS. Based on the local situation, the adsorption capacity of unsaturated zone wasn＇ t depleted. The relationship between soil thickness and adsorption capacity was positively correlated. The maximum adsorption of F- was 2.85 -2.91 mg/kg by isothermal adsorption curve. There was little relationship between soil thickness and adsorption on NH4＋. On the other hand, the adsorption was related to the soil background value. Conclusion] The research could provide certain data information for the improvement of tank with bad anti-seepage measure.