USE OF WEAK-ACID CATION-EXCHANGE RESINS PUROLITE C105 (H+) AND PUROLITE C106 (H+) FOR THE ADSORPTION OF UO2(2+)

The polyacrylic weak-acid cation-exchangers Purolite C105 (H+) and Pur olite C106(H+) have been used in batchwise adsorption of UO22+ from ni trate solutions containing 0.01 M of UO22+ at pH 3.2. The two resins, which have a saturation capacity up to about 1.24 mmol UO22+ g-1 resin , showed rapid exchange kinetics. In addition, the resin Purolite C105 (H+ ) displayed high UO22+ loading in small-scale column operations a nd retained its capacity after five cycles. Adsorbed UO22+ was rapidly and quantitatively eluted from this resin with 0.1 N H2SO4.