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Sorption of U(VI) on magnetic sepiolite investigated by batch and XANES techniques

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Abstract

Magnetic sepiolite was synthesized by chemical precipitation of Fe3+ and Fe2+ at sepiolite suspension. Removal kinetics of U(VI) on sepiolite and magnetic sepiolite can be well fitted by pseudo-second-order and pseudo-first-order kinetic models, respectively. At pH < 5.0, U(VI) removal on sepiolite significantly decreased with increasing ionic strength, whereas U(VI) removal on magnetic sepiolite was independent of ionic strength. The maximum removal capacity of sepiolite and magnetic sepiolite at pH 5.0 and 298 K calculated from Langmuir model were 28.17 and 74.63 mg/g, respectively. XANES spectra suggested that U(VI) was partly reduced to U(IV) at long-term conditions.

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Acknowledgements

This work was supported by the Zhejiang Science and Technology Plan Project (2017C33231).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, Zhejiang, 312000, People’s Republic of China

    Wensheng Linghu, Yanxia Sun, Hai Yang & Kaikai Chang

  2. Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, People’s Republic of China

    **gyuan Ma & Yuying Huang

  3. Shaoxing Entry-Exit Inspection and Quarantine Bureau, Shaoxing, Zhejiang, 312000, People’s Republic of China

    Wenhong Dong

  4. Nonlinear Analysis and Applied Mathematics (NAAM) Research Group, Department of Mathematics, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia

    Ahmed Alsaedi & Tasawar Hayat

  5. Department of Mathematics, Quaid-I-Azam University, Islamabad, 44000, Pakistan

    Tasawar Hayat

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  1. Wensheng Linghu
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  2. Yanxia Sun
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  3. Hai Yang
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  5. **gyuan Ma
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  8. Ahmed Alsaedi
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  9. Tasawar Hayat
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Correspondence to Wensheng Linghu.

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Linghu, W., Sun, Y., Yang, H. et al. Sorption of U(VI) on magnetic sepiolite investigated by batch and XANES techniques. J Radioanal Nucl Chem 314, 1825–1832 (2017). https://doi.org/10.1007/s10967-017-5531-4

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  • DOI: https://doi.org/10.1007/s10967-017-5531-4

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