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用扩散池法研究了在室温条件下pH值和溶液浓度对Cs在压实膨润土和黏土中的扩散系数和吸附分配系数的影响。实验测得的扩散曲线符合Fick’s第二定律。实验结果表明,Cs在压实膨润土和黏土中的扩散系数均随pH值升高而减小,吸附分配系数随pH值升高无明显变化。Cs在膨润土和黏土中的扩散系数随溶液浓度升高而增大,吸附分配系数随溶液浓度升高而减小。
The effects of pH value and solution concentration on the diffusion coefficient and adsorption partition coefficient of Cs in compacted bentonite and clay were investigated by diffusion cell method at room temperature. The experimentally measured diffusion curves conform to Fick’s second law. The experimental results show that the diffusion coefficient of Cs in compacted bentonite and clay decreases with the increase of pH, and the adsorption partition coefficient does not change significantly with the increase of pH. The diffusion coefficient of Cs in bentonite and clay increased with the increase of solution concentration, and the adsorption partition coefficient decreased with the increase of solution concentration.