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Effective adsorption of U(VI) onto phosphate- and amine-linker-based organic polymer

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Abstract

The efficient removal of uranium from aqueous solutions is critical for ecological safety. Herein, a novel phytic acid and melamine covalent polymer adsorbent (named PEM) was designed and synthesized through a simple one-pot method, and its adsorption performance and mechanism of U(VI) were systematically investigated. The maximum adsorption capacity on U(VI) achieved 505.05 mg g−1 at pH 4.0, calculated with the Langmuir model, which was much higher than most other adsorbents under the same environment. Importantly, the reaction reached equilibrium quickly in the initial 20 min at 298 K. The sorption process conformed to a pseudo-second-order kinetics model and Langmuir model, indicating that the chemisorption of the monolayer was dominant. Overall, the synthesized PEM could be utilized as an easy, efficient, less time-consuming material for the removal of uranium from acidic nuclear wastewater.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (22076155, 21976148, 11905177); Sichuan Science and Technology Program (2020JDRC0068); the Project of Science and Technology Department of Sichuan Province (No. 2021JDTD0019); the Project of State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology (Nos. 18fksy0215, 20fksy12); Undergraduate Innovation Fund Project of Southwest University of Science and Technology (CX22-016).

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  1. Yaoxuan Wang, Siyihan Duan and Wanrong Song have contributed equally to this work.

Authors and Affiliations

  1. State Key Laboratory of Environment-Friendly Energy Materials, Southwest University of Science and Technology, Mianyang, 621010, China

    Yaoxuan Wang, Siyihan Duan, Wanrong Song, Tao Duan & Lin Zhu

  2. Tianfu Institute of Research and Innovation, Southwest University of Science and Technology, Chengdu, 610299, China

    Yaoxuan Wang, Siyihan Duan, Wanrong Song, Tao Duan & Lin Zhu

  3. National Co-Innovation Center for Nuclear Waste Disposal and Environmental Safety, Southwest University of Science and Technology, Mianyang, 621010, China

    Yaoxuan Wang, Siyihan Duan, Wanrong Song, Tao Duan & Lin Zhu

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Contributions

Conceptualization: YW; Methodology: YW; Investigation: YW, SD, WS; Validation, formal analysis, and data curation: YW, SD, WS; Writing—original draft preparation: YW, SD, WS; Supervision, LZ; Project administration: TD, LZ; Funding acquisition: TD, LZ. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Tao Duan or Lin Zhu.

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Wang, Y., Duan, S., Song, W. et al. Effective adsorption of U(VI) onto phosphate- and amine-linker-based organic polymer. J Radioanal Nucl Chem 332, 4179–4190 (2023). https://doi.org/10.1007/s10967-023-09100-2

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