SORPTION BEHAVIOR OF W, HF, LU, U, AND TH ON ION-EXCHANGERS FROM HCL H2O2 SOLUTIONS - MODEL EXPERIMENTS FOR CHEMICAL STUDIES OF SEABORGIUM (SG)/

In model experiments with W, Hf, Th, and U radionuclides, a chemical s ystem was developed for the separation of seaborgium from element 104 and heavy actinides, i.e., cation exchange on Dowex 50X8 from solution s containing 0.1-1.0 M HCl and 0.5-2.0 vol% H2O2. The system should be suitable for fast online experiments if seaborgium exhibits a non-ura nium-like behaviour. Adding hydrogen peroxide to mixed HCl/HF solution s suppresses the partial sorption of W and, presumably seaborgium, on the cation exchanger. This way, the elution volume can be minimized. P rospects for anion exchange separations of group 6 from group 4 elemen ts are also briefly discussed.