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Reference type: Journal
Authors: Liu MC, Chen CL, Wen T, Wang XK
Article Title: Synthesis of magnetic ion-imprinted composites and selective separation and preconcentration of U(VI).
Publication date: 2014
Journal: Dalton Transactions
Volume: 43
Issue: (19)
Page numbers: 7050-7056.
DOI: 10.1039/C3DT53527D

Abstract: The U(VI) magnetic ion-imprinted composite (MIIC) with a uniform core-shell structure for the selective separation and preconcentration of U(VI) was prepared by copolymerization of a ternary complex of uranyl ions with 4-VInylpyridine (4-VP) and acrylamide in the presence of 2,2'-azobisisobutyronitrile. The sorption of U(VI) on the MIIC from aqueous solution was evaluated. The maximum sorption capacity of MIIC for U(VI) was 354.85 mg g-1, which was much higher than that of the magnetic nonimprinted composite. The MIIC could be recovered by desorbing the U(VI)-loaded MIIC with 0.5 mol L-1 HNO3, and the surface morphology of MIIC after five consecutive sorption/desorption cycles was significantly damaged. The competitive sorption experiments showed that the MIIC had a desirable selectivity for U(VI) over a range of competing metal ions. The MIIC may be a promising sorbent material for the selective separation and preconcentration of U(VI)
Template and target information: uranyl ion, U(VI)


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