Abstract
The sorption of radionuclide 90-Sr(II) from aqueous solution onto kaolinite was studied by batch experiments under various experimental conditions. Kaolinite was characterized by XRD and FT-IR. The kinetic sorption process was well described by pseudo-second-order model. The sorption isotherms indicate that the sorption of 90-Sr(II) on kaolinite was better fitted by Langmuir than Freundlich and D–R models. The thermodynamic parameters (i.e., ΔH 0, ΔS 0 and ΔG 0) suggest that the sorption was a spontaneous and endothermic process. The sorption of 90-Sr(II) on kaolinite was mainly dominated by ion exchange and outer-sphere surface complexation.
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Financial supports from National Natural Science Foundation of China (21377132 and 21307135) were acknowledged.
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Chen, X., Peng, S. & Wang, J. Retention profile and kinetics characteristics of the radionuclide 90-Sr(II) onto kaolinite. J Radioanal Nucl Chem 303, 509–519 (2015). https://doi.org/10.1007/s10967-014-3458-6
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DOI: https://doi.org/10.1007/s10967-014-3458-6