Adsorption of UO22+ by polyethylene hollow fiber membrane with amidoxime group

The polyethylene (PE) membrane was prepared by the radiation-induced grafti ng of acrylonitrile (AN) onto PE hollow fiber and by the subsequent amidoxi mation of cyano groups in poly-AN graft chains. The adsorption characterist ics of the chelating hollow fiber membrane was examined as the solution of UO22+ permeated across the chelating hollow fiber membrane. The inner and o uter diameter increased with an increasing grafting yield, whereas, the pur e water flux and pore diameter decreased with an increasing grafting yield. The adsorption of UO22+ by the chelating hollow fiber membranes increased with an increasing amidoxime group. The adsorbed amount of UO22+ in the ura nyl acetate solution was higher than that in the uranyl nitrate solution Th e adsorbed amount of UO22+ is higher than that of Cu2+ when the solution of UO22+ and Cu2+ permeated across the chelating membrane, respectively. The adsorption characteristics of UO22+ by the amidoxime group-chelating fiber membrane in the presence of Na1+ and Ca2+ showed a high selectivity for UO2 2+ even though there was a high concentration of Na1+ and Ca2+ in the inlet solution.