Abstract
A simple and reliable method for solid phase extraction of thorium using tetraphenylimidodiphosphinate is presented. The solid phase extraction process was optimized at equilibrium time 3 h, pH = 4.5, initial concentration 30 mg L−1 and extractant dosage 0.01 g with 98.95 % of removal efficiency and 29.68 mg g−1 of adsorption capacity. The interfering ions experiments indicated that it had almost no effect on thorium adsorption. Kinetics data follow the pseudo-first-order model and equilibrium data agreed with the Langmuir isotherm model very well. FT-IR analysis indicated that imino group and phosphoryl acted as the significant roles in the solid phase extraction process.
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Acknowledgments
We gratefully acknowledge the anonymous reviewers for their constructive comments which have improved the quality of this paper. We also acknowledge Dr. Zhou Shiming (Tian Jing University) for assistance with SEM, 1H NMR, 31P{1H} NMR measurements.
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Liu, N., Wang, Y. & He, C. Tetraphenylimidodiphosphinate as solid phase extractant for preconcentrative separation of thorium from aqueous solution. J Radioanal Nucl Chem 308, 393–401 (2016). https://doi.org/10.1007/s10967-015-4454-1
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DOI: https://doi.org/10.1007/s10967-015-4454-1