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

铜离子吸附实验结果表明，不同风化程度的样品对铜离子的吸附性能有显著差异。烧损作为风化程度的判据，与吸附铜离子的量有关。从吸附特征分析可知，轻度风化样品为朗缪尔型，重度风化样品为BET型，X射线显微分析证实，重度风化样品的吸附现象是由于风化程度的增加而引起的孔隙系统内的吸附现象。特别是，风化样品的原状样品对铜离子的吸附和浓度的变化表现为土壤组构的特征，这种变化依赖于土壤的孔径分布。

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.