Study of kinetics, equilibrium and isotope exchange in ion exchange systems Pt. 5

The kinetics of Na+ - UO22+ and Mg2+ - UO22+ ion exchange on strongly acidic cation exchangers in a batch stirred reactor was studied. The exchangers Ostion KS (containing DVB in the range of 1.5-12%) and Amberlite IR 120 for experimental work were used; the concentration of the aqueous nitrate solution was always 0.2 molx1-1. The Nernst-Planck equation was applied for description of ion diffusion in the particle. The diffusion coefficients of UO22+ ions in the exchangers and their dependence on the content of DVB were obtained by evaluating the experimental data. (author)