Investigation of 85Sr adsorption on selected soils of different horizons

The influence of calcium ions on the extent of adsorption of 85Sr isotope on soil samples from surface horizons of four sites is presented. Depending on the soil type differing degrees of competitive adsorption of Sr and Ca were observed. Desorption of 85Sr by distilled water as well as Ca(NO3)2 solution was also examined. Both methods resulted in the removal of a considerable proportion of the adsorbed isotope from the soil. Additionally the kinetics of the desorption process were studied.