SORPTION STUDIES OF EUROPIUM ON LEAD DIOXIDE FROM AQUEOUS-SOLUTIONS

Sorption of europium on lead dioxide from aqueous solutions has been s tudied using batch equilibration to determine both equilibrium conditi ons and sorption rates. The concentration, pH and temperature were var ied. The influence of other anions, cations and other solutes on the i sotherm was examined. The presence of EDTA, citrate, oxalate, tartrate , thiocyanate, U(VI), Th(IV), Fe(III), Cr(III), Al(III), Pb(II) and ba rium reduced europium sorption. The sorptions of Hg(II), Ag(I), Ta(V), Fe(III), In(III) and Tc(VII) on lead dioxide were also studied. All t hese have sufficiently low sorption isotherms that their separation fr om europium should be practical.