Distribution Coefficient of Strontium on Variety of Minerals and Rocks

Abstract

Sorption of strontium on a number of minerals and rocks has been studied by varying aqueous concentrations of strontium. Distribution coefficients (K _d) of strontium determined by a batch method remained constant at a low concentration level and decreased with increasing concentration at a high concentration level. Values of K _d,tr at trace concentrations were considerably different depending on types of geological samples. A linear relationship was observed between the values of K _d,tr and the cation exchange capacity (CEC) for cesium as: log K _d,tr=log CEC+constant. The values of K _d,tr of strontium changed almost linearly to those of cesium for individual samples suggesting a similarity in physicochemical interactions between geological samples and these ions.

KEYWORDS:

• distribution coefficient
• strontium
• concentration dependence
• minerals
• rocks
• cation exchange capacity
• linear relationship