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1975•Japanese Journal of Health PhysicsOpen access

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Tenson Tsutsui, Kenzo Nishimaki

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Abstract

The adsorption of radioactive cations to clay minerals, which governs the movement of radioactive cations through the saturated zone, has been investigated.The ion exchange capacities of Amberlite IR-120B, Green Sand and KUR Sand were measured for NH4+, Ca2+, Mg2+, Na+ and Cs-. The results showed that the capacities of these ion exchangers were not changed with the kinds of cations examined. The distribution coefficients (KdA for x) of each radioactive cation (22Na, 137Cs, 54Mn, 60Co, 65Zn, 85Sr and 133Ba) to the ion exchangers saturated with Ca2+, Mg2+ or Na+ were obtained for the several concentrations (Cx) of the corresponding cations. The following empirical equation was derived from the above results.KdA for x=mx (Cx)-nxInfluence of the presence of Ca2+, Mg2+ and Na+ were discussed using the values of mx and nx.It can be concluded that Ca2+ and Mg2+ influence largely on the adsorption of radioactive cationsin the saturated zone.

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The adsorption of radioactive cations to clay minerals, which governs the movement of radioactive cations through the saturated zone, has been investigated.The ion exchange capacities of Amberlite IR-120B, Green Sand and KUR Sand were measured for NH4+, Ca2+, Mg2+, Na+ and Cs-. The results showed that the capacities of these ion exchangers were not changed with the kinds of cations examined. The distribution coefficients (KdA for x) of each radioactive cation (22Na, 137Cs, 54Mn, 60Co, 65Zn, 85Sr and 133Ba) to the ion exchangers saturated with Ca2+, Mg2+ or Na+ were obtained for the several concentrations (Cx) of the corresponding cations. The following empirical equation was derived from the above results.KdA for x=mx (Cx)-nxInfluence of the presence of Ca2+, Mg2+ and Na+ were discussed using the values of mx and nx.It can be concluded that Ca2+ and Mg2+ influence largely on the adsorption of radioactive cationsin the saturated zone.

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The adsorption of radioactive cations to clay minerals, which governs the movement of radioactive cations through the saturated zone, has been investigated.The ion exchange capacities of Amberlite IR-120B, Green Sand and KUR Sand were measured for NH4+, Ca2+, Mg2+, Na+ and Cs-. The results showed that the capacities of these ion exchangers were not changed with the kinds of cations examined. The distribution coefficients (KdA for x) of each radioactive cation (22Na, 137Cs, 54Mn, 60Co, 65Zn, 85Sr and 133Ba) to the ion exchangers saturated with Ca2+, Mg2+ or Na+ were obtained for the several concentrations (Cx) of the corresponding cations. The following empirical equation was derived from the above results.KdA for x=mx (Cx)-nxInfluence of the presence of Ca2+, Mg2+ and Na+ were discussed using the values of mx and nx.It can be concluded that Ca2+ and Mg2+ influence largely on the adsorption of radioactive cationsin the saturated zone.

Key concepts: Amberlite, Chemistry, Adsorption, Ion exchange, Ion, Cation-exchange capacity, Inorganic chemistry, Qualitative inorganic analysis

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