Abstract
Chelating membranes containing amidoxime groups for the recovery of uranium were synthesized by the radiation-induced graft polymerization of acrylonitrile onto high- and low-density polyethylene films, followed by amidoximation of the cyano groups. The amidoxime group contents of both chelating membranes were about 2.0 tool per kilogram of HCl-conditioned membrane. Both amidoxime-group-containing membranes showed maximum uranium adsorption capacity for uranyl solutions between pH 5 and 7. Uranium permeability of the low-density-polyethylene-based chelating membrane was found to be much better than that of the high-densitypolyethylene-based chelating membrane.
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