Investigation into sorption of uranium fron its high-concentrated nitric acid solutions on resin AMP

Sorption of uranium has been studied on strongly basic anion-exchange resin from nitric acid solutions with concentration in metal 10-150 g/l in presence of sodium, calcium, and aluminium nitrates. Sorption of uranium from solutions has been performed by the static method with the aid of contacting the initial solution with airdry resin for 4 hours, resin to solution ratio being 1:12.5. It has been established that sorption of uranium increases with a rise in concentration of salting out agents in the following order: Al(NO3)3 > Ca(NO3)2 > Na(NO3). It has been shown spectrophotometricatly that in solutions of nitrates and HNO3 with a concentration < 6 mol/l, uranyl-ion is present, mainly, as neutral complex ions when its concentration is 100 g/l. The formation of anion complex uranyl-ions is observed when concentration of HNO3 exceeds 6 mol/l