Abstract
Alginate-Ca/attapulgite clay core/shell particles were synthesized via electro-coextrusion. Affecting parameters on the removal of uranium, such as pH, initial uranium concentration, temperature and co-existing cations were investigated. The uranium adsorption process was endothermic, feasible and spontaneous. The maximum adsorption capacity of the adsorbent for uranium was 199.345 mg/g at pH 3 and at 328.15 K. The results showed that the pseudo-second-order model and the Langmuir isotherm model fitted well with the data obtained. Based on the adsorption–desorption study, the adsorbent shows excellent reusability. The mechanism of uranium adsorption on the adsorbent was a combination of ion-exchange and an electrostatic interaction.
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Acknowledgements
This work was supported by the National Key Scientific Projects for Decommissioning of Nuclear Facilities and Radioactive Waste Management (14zg6101), National Natural Science Foundation of China (21406180), Professional Scientific Research Innovation Team Building Fund Projects of Key Research Platform of Southwest University of Science and Technology (No.14tdsc02) and Postgraduate Innovation Fund Project by Southwest University of Science and Technology (17ycx004). The authors gratefully thank the technology support of Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology.
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Hu, S., Lin, X., Zhang, Y. et al. Preparation and application of alginate-Ca/attapulgite clay core/shell particle for the removal of uranium from aqueous solution. J Radioanal Nucl Chem 314, 307–319 (2017). https://doi.org/10.1007/s10967-017-5427-3
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DOI: https://doi.org/10.1007/s10967-017-5427-3