Study on Mechanism of Chemical Pollutant Migration in Soil during Water Permeation

铜离子吸附实验结果表明，不同风化程度的试样对铜离子的吸附性能有显著差异。燃烧损失与吸附铜离子的量有关，是表征风化程度的一个指标。对微风化试样的吸附特征进行了详细的考察，发现微风化试样为Langmuir型，重度风化试样为BET型，并通过X射线微分析仪证实了重度风化试样的吸附现象为风化程度增加引起的孔隙系统内的吸附。特别是，未受扰动的风化样对铜离子的吸附和浓度的变化表现为依赖于孔隙大小分布的土壤结构。

It is found from the results of copper ion adsorption experiment that the copper ion adsorption properties vary remarkably with the degree of weathering of samples. The ignition loss which has been adopted as a criterion of the degree of weathering is related to the amount of adsorbed copper ion. The slightly weathered sample shows Langmuir type and the severely weathered one is given by BET type from the sdsorption characteristics examining in detail, and the adsoption phynomenon for the severely weathered sample is confirmed as the adsorption within the pore systems caused by increasing degree of weathering by means of X ray micro analyer. Especially, the copper ion adsorption and the change of concentration for undisturbed sample of the weathered sample are charaterized by the soil fabric which is dependent on the pore size distribution.