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研究了铯、锶在砂土介质中的分配系数Ｋｄ和滞留因子Ｒｄ。静态试验结果表明：溶液中核素浓度较低时，铯、锶的分配系数Ｋｄ基本保持不变；核素浓度较高时，分配系数Ｋｄ随浓度增加而减小； Ｋｄ值还随ｐＨ升高而变大，随溶液中其它阳离子浓度增加而减小。动态模拟试验表明：铯的迁移速度小于锶的迁移速度。虽然动态试验与静态试验的分配系数有一定差异，但其变化规律是一致的。
The partition coefficient Kd and retention factor Rd of cesium and strontium in sand media were studied. The results of static tests show that the partition coefficient Kd of cesium and strontium remains unchanged when the concentration of the nuclide is low, and the distribution coefficient Kd decreases with the increase of the concentration when the nuclide concentration is high. The Kd value also increases with the increase of pH But becomes larger, decreases as the concentration of other cations in the solution increases. Dynamic simulation tests show that the migration rate of cesium is less than that of strontium. Although there is a certain difference between the distribution coefficient of dynamic test and static test, the change rule is the same.