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Issue 19, 2014
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Synthesis of magnetic ion-imprinted composites and selective separation and preconcentration of U(VI)

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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).

Graphical abstract: Synthesis of magnetic ion-imprinted composites and selective separation and preconcentration of U(vi)

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Publication details

The article was received on 16 Dec 2013, accepted on 21 Feb 2014 and first published on 24 Feb 2014


Article type: Paper
DOI: 10.1039/C3DT53527D
Citation: Dalton Trans., 2014,43, 7050-7056
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    Synthesis of magnetic ion-imprinted composites and selective separation and preconcentration of U(VI)

    M. Liu, C. Chen, T. Wen and X. Wang, Dalton Trans., 2014, 43, 7050
    DOI: 10.1039/C3DT53527D

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