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In this study, selective adsorption of U(VI) in aqueous solutions in the presence of various lanthanide ions was conducted by using U(VI)-imprinted cryogel polymer. For this purpose, the pHEMA(MAH)3-U(VI) cryogel polymer was prepared by free radical polymerization method. U(VI) was desorbed with 5.0 mol.L HNO3 and thus U(VI)-imprints were created on p-HEMA-(MAH)3 cryogel polymer. To determine the optimum conditions, in the process of selective adsorption of U(VI) ion to U(VI)-imprinted p-HEMA-(MAH)3 cryogel polymer, some parameters such as pH, flow rate, initial U(VI) concentration were investigated. Under the optimum conditions, the maximum adsorption capacity was obtained as 74.80 mg.g. Selectivity studies were also carried out in the presence of Nd(III), La(III) and Y(III) ions using U(VI)-imprinted p-HEMA-(MAH)3 cryogel polymer. The obtained adsorption order under competitive conditions was U(VI) ˃ La(III) ˃Y(III) ˃Nd(III).

SELECTIVE ADSORPTION OF U(VI) BY USING U(VI)- IMPRINTED POLY-HYDROXYETHYL METHACRYLATEMETHACRYLOYL-L-HISTIDINE (P-[HEMA-(MAH)3]) CRYOGEL POLYMER