STUDIES ON ION-EXCHANGE EQUILIBRIA AND KINETICS .6. PREDICTION OF ION-EXCHANGE EQUILIBRIA OF UO22-NA+-H+ TERNARY-SYSTEM()

Experimental data are reported for the ion exchange equilibria of the binary systems UO22+-H+, UO22+-Na+ and Na+-H+, and of the ternary syst em UO22+-Na+-H+ on a strong acid cation exchange resin 001X7 at 25 deg rees C. It is found that the equilibria for any pairs of ions are esse ntially the same in binary and ternary mixtures and that the predictio n method proposed by our laboratory for SO22--Cl--NO3--201X7 strong ba se anion exchange resin system is also applicable to the ternary syste m studied in this paper. The predictions of the ternary system UO22+-N a+-H+ based solely on the binary data without using resin phase activi ty coefficients are consistent with the experimental data.