本文利用吸附等温方程,吸附动力学模型,对流-弥散-吸附,解吸有限元模型来刻划饱气带内渗水条件下,Pb(Ⅱ)在土层中不同时间,不同深度上的迁移及分布特征。并通过实验前后土化学分析资料以及野外实际土化学监测资料的对比,论证了模型运算的可靠性,确定 Pb(Ⅱ)在饱气带土层系统中的迁移和分布规律。

With the isothermal adsorption equation,dynamical model of adsorption,one dimension convection-dispersion-adsorption-disadsorption finite element model,the paper studies the contribution and migration of Pb(Ⅱ)in soil of vadose zone under the condition of infiltration of solution at the different time arid depth of soil.Reliability of calculating models is demonstrated through contrasting soil-chemical data analyzed before experiment with that after experiment,and contrasting calculation results with the field soft-chemical data,which determine the mode of migration and distribution of Pb(Ⅱ)in soil of vadose zone.