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Reference type: Journal
Authors: Qian J, Zhang S, Zhou Y, Dong P, Hua DB
Article Title: Synthesis of surface ion-imprinted magnetic microspheres by locating polymerization for rapid and selective separation of uranium(VI).
Publication date: 2015
Journal: RSC Advances
Volume: 5
Issue: (6)
Page numbers: 4153-4161.
DOI: 10.1039/C4RA10037A

Abstract: Uranium(VI) may pose a great threat to human health and the environment owing to its high chemical toxicity and radioactivity. A novel method is reported herein to synthesize surface ion-imprinted magnetic microspheres (SII-MM) for efficient removal of uranium(VI). Specifically, uranyl ion-imprinted polymer-functionalized Fe3O4@SiO2 microspheres were prepared by surface-locating copolymerization of N-hydroxyethylacrylamide and 1-vinylimidazole. The effects of chemical composition, pH, adsorbent dose, competing ions and initial concentration on the adsorption of uranyl ions were evaluated. The exothermic spontaneous adsorption kinetically followed a pseudo-second-order model, and the process of SII-MM could reach equilibrium with a capacity of 146.41 mg of U per g within 1.0 min at pH 5.0 and 298.15 K. Compared with non-imprinted composites, SII-MM showed higher selectivity, faster kinetics, and larger capacity for uranyl adsorption. This work indicates that the SII-MM can be used as a promising adsorbent to effectively remove uranium(VI) from aqueous solutions
Template and target information: uranyl ion, U(VI)


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