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Preparation of hollow SiO2 microspheres functionalized with amidoxime groups for highly efficient adsorption of U(VI) from aqueous solution

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Abstract

The amidoxime-functionalized hollow SiO2 microspheres (HSA) were prepared for highly efficient U(VI) adsorption. Results showed that amidoxime modification could improve both sorption capacity and sorption selectivity for U(VI), however, excess functionalization might block the mesopores and thus restricting U(VI) sorption. The maximum U(VI) sorption capacity was 109.6 mg/g for HSA15 at 298 K and pH 5.0. The U(VI) sorption isotherms could be described by Langmuir model; whereas the sorption kinetics fitted well with the pseudo-second-order equation, indicating of monolayer chemisorption mechanism. The HSA sorbents could be efficiently regenerated by 0.6 M HNO3 and reused for several sorption–desorption cycles.

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Acknowledgements

This work was financially supported by the National Natural Science Fund Program (21366001; 21667001), the International Scientific and Technological Cooperation Projects (2015DFR61020), the Key Research and Development Program of Jiangxi Province (20161BBF60059), the Scientific Research Project from Education Department of Jiangxi Province (GJJ17380), and the Scientific and Technological Cooperation Project of Jiangxi Province (20161BBH80046).

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Authors and Affiliations

  1. State Key Laboratory for Nuclear Resources and Environment, East China University of Technology, 418 Guanglan Road, Nanchang, 330013, People’s Republic of China

    Ying Dai, Jieyun Jin, Limin Zhou, Tianqi Li, Zhao Li, Zhirong Liu & Guolin Huang

  2. Radioactive Geology and Exploration Technology Laboratory, East China University of Technology, 418 Guanglan Road, Nanchang, 330013, People’s Republic of China

    Jieyun Jin & Zhirong Liu

  3. School of Chemical Sciences and Engineering, University of New South Wales, Sydney, 2035, Australia

    Limin Zhou & Adesoji A. Adesina

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  1. Ying Dai
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  2. Jieyun Jin
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  3. Limin Zhou
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  4. Tianqi Li
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  5. Zhao Li
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  6. Zhirong Liu
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  7. Guolin Huang
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  8. Adesoji A. Adesina
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Correspondence to Jieyun Jin or Limin Zhou.

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Dai, Y., Jin, J., Zhou, L. et al. Preparation of hollow SiO2 microspheres functionalized with amidoxime groups for highly efficient adsorption of U(VI) from aqueous solution. J Radioanal Nucl Chem 311, 2029–2037 (2017). https://doi.org/10.1007/s10967-016-5128-3

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  • DOI: https://doi.org/10.1007/s10967-016-5128-3

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