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Preparation of Ca-alginate coated nZVI core shell beads for uranium (VI) removal from aqueous solution

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Abstract

In this study, the core–shell nanoscale zero-valent iron (nZVI)@Alg–Ca beads were synthesized by coaxial electronic injection method for removal of U (VI) from aqueous solution, and characterized by SEM, EDX and XPS. The results showed that the pseudo-second-order models and the Langmuir isotherm model fitted well with the data obtained. The removal mechanism may include both physical adsorption of U (VI) on the surface or inside of core–shell nZVI@Alg–Ca beads and subsequent reduction of U (VI) to U (IV). Therefore, the core–shell nZVI@Alg–Ca beads would have an application prospect in effective removal of U (VI) contamination from aqueous solution.

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Acknowledgements

This work was sponsored the National Key Scientific Projects for Decommissioning of Nuclear Facilities and Radioactive Waste Management(14zg6101), Longshan academic talent research support plan of Southwest University of Science and Technology (17LZX302) and supported by Postgraduate Innovation Fund Project by Southwest University of Science and Technology(17ycx004). The authors would like to thank the Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology (14tdsc02).

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Correspondence to Xiaoyan Lin.

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Hu, S., Lin, X., Zhang, Y. et al. Preparation of Ca-alginate coated nZVI core shell beads for uranium (VI) removal from aqueous solution. J Radioanal Nucl Chem 314, 2405–2416 (2017). https://doi.org/10.1007/s10967-017-5529-y

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