Abstract
An organanophosphinic acid extractant Cya- nex272 was impregnated on a macroporus polymeric solid support Amberlite XAD-2 and packed in a column to study sorption and desorption of U(VI) in HNO3 media. Various physio-chemical parameters such as influence of HNO3 concentration, amount of Cyanex272, nature of eluents, sample and eluent flow rates were studied systematically to optimize conditions for sorption and desorption of U(VI). The breakthrough volume for U(VI) was (1000 mL and column reusability was more than 50 cycles. U(VI) was selectively separated from some commonly associated rare earth elements and certain d-block elements in binary and synthetic mixtures. The method developed for U(VI) was applied for its recovery from uranmicrolite (leachate) ore tailings and an industrial effluent sample.
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