Cs在压实膨润土和黏土中扩散行为研究

Diffusion Behavior of Cs in Compacted Bentonite and Clay

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。

At room temperature was studied by diffusion pool method solution pH and concentration of Cs in compacted bentonite and clay in the diffusion coefficient and the influence of adsorption distribution coefficient. The experiment measured accord with the second law of Fick's diffusion curves. The experimental results show that the Cs in the compaction of bentonite and clay diffusion coefficient decreases with increased pH value, adsorption distribution coefficient increases with PH has no obvious change, Cs in diffusion coefficient of bentonite and clay with the increase of solution concentration increasing, the adsorption distribution coefficient decreases with solution concentration increased.