Abstract
Experimental studies on the partitioning of minor elements between carbonate and aqueous solution were summarized in order to elucidate the partitioning of radioactive elements migrating from high level nuclear waste to geologic environment between carbonate and aqueous solution. The relationships among the partition coefficient, solubility product and solubilitytheoretically derived. The factors causing derivation of the experimental partition coefficients from theoretical ones (diffusion, (were) reaction rate, physical properties of solid solution) were considered. The relationship between the partition coefficients and ionic radii suggests that physical factors of solid solution are important for determining the partition coefficient values.
