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Adsorption behavior of uranium on polyvinyl alcohol-g-amidoxime: Physicochemical properties, kinetic and thermodynamic aspects

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  • Special Topic Extraction of Uranium from Seawater
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Abstract

Amidoxime-based adsorbents are widely studied as the main adsorbent in the recovery of uranium from seawater. However, the adsorption rate and loading capacity of such adsorbents should be further improved due to the economic viability consideration. In this paper, polyvinyl alcohol functionalized with amidoxime (PVA-g-AO) has been prepared as a new adsorbent for uranium (VI) adsorption from aqueous solution. The physicochemical properties of PVA-g-AO were investigated using infrared spectroscopy (IR), scanning electron microscope (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Results showed that the ligand monomers were successfully grafted onto the matrixes. The XRD and XPS analysis showed that uranium was adsorbed in metal ionic form rather than in crystal form. Uranyl (U (VI)) adsorption properties onto PVA-g-AO were evaluated. The adsorption of U (VI) by PVA-g-AO was fast, with an equilibrium time of less than 50 min. Additionally the maximum adsorption capacity reached 42.84 mg/g at pH 4.0.

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Authors and Affiliations

  1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China

    FangTing Chi, Sheng Hu, Jie Xiong & XiaoLin Wang

  2. School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China

    FangTing Chi

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  1. FangTing Chi
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  2. Sheng Hu
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  3. Jie Xiong
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Correspondence to XiaoLin Wang.

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Chi, F., Hu, S., Xiong, J. et al. Adsorption behavior of uranium on polyvinyl alcohol-g-amidoxime: Physicochemical properties, kinetic and thermodynamic aspects. Sci. China Chem. 56, 1495–1503 (2013). https://doi.org/10.1007/s11426-013-5003-9

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  • DOI: https://doi.org/10.1007/s11426-013-5003-9

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