Uranyl ion adsorptivity of N-vinyl 2-pyrrolidone/acrylonitrile copolymerichydrogels containing amidoxime groups

N-vinyl 2-pyrrolidone (VP) / Acrylonitrile (AN) copolymeric hydrogels were synthesized by using gamma-radiation and amidoximated for the purpose of ur anyl ion adsorption. Optimum amidoximation time was determined by following the uranyl ion, UO22+, adsorption capacity. The adsorption of amidoximated copolymers was studied from different uranyl ion solutions (1000-1850 ppm) . The results of all adsorption studies showed that the interaction between UO22+ and amidoxime groups comply with Langmuir type isotherm. The adsorpt ion capacity was found as 0.54 g UO22+ /g dry amidoximated copolymeric hydr ogels. From the stoichiometric calculations, it was found that the bonding between UO22+ and amidoxime groups is I to 4.