Adsorption of nuclides on mixtures of minerals

Distribution coefficients for adsorption of Sr(II) and Cs(I) on binary mixtures of various clay minerals and oxides have been determined in order to see whether distribution coefficients of mixtures can be predicted from those of the pure minerals. It is shown that in some cases, the distribution coefficients of mixtures are equal to the sum, Σfsub(i)Dsub(i), where fsub(i) is the weight fraction of component i and Dsub(i) is the distribution coefficient of that mineral. However, in some cases significant deviations from this relation were observed which probably indicate the presence of the interactions between the minerals. (author)