Preparation of amidoximated polymer composite based on CMK-3 for selective separation of uranium from aqueous solutions

The ability of amidoximated mesoporous carbon (AO/CMK-3) by in situ polymerizing acrylonitrile onto the surface of mesoporous carbon (CMK-3) and reducing with hydroxylamine hydrochloride had been explored for the removal and recovery of uranium from aqueous solutions. The monolayer maximum capacity of AO/CMK-3 was improved from 69.20 of CMK-3 to 238.7 mg/g at 298 K. Calculated thermodynamic parameters showed endothermic property of the adsorption process, while kinetic parameters indicated that the interaction followed pseudo-second kinetic model. Selective separation of U(VI) from effluent by AO/CMK-3 was achieved.