Abstract
The adsorption of radioactive cations to clay minerals, which governs the movement of radioactive cations through saturated zone, was investigated.In this study we dealt with calcium ion as the only ion in ground water which influenced the adsorption of radioactive cations to clay minerals.The experiments were carried out with seven radioactive cations (22Na, 137Cs, 54Mn, 60Co, 65Zn, 85Sr and 133Ba) and three ion exchangers (Amberlite IR-120B, Green Sand and KUR Sand) in stead of clay minerals.The distribution coefficient KdA of a radioactive cation to a saturated ion exchanger with calcium ion, was investigated experimentally under several concentrations of calcium ion (CCa).On the basis of experimental results, the following empirical equation obtained.KdA=m·(CCa)-nIn this equation, the values of m and n are determined mainly by the type of radioactive cations and ion exchangers.
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