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Preparation and application of supported ionic liquid phases for sorption of Pt(IV) from chloride solution

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Abstract

Four ionic liquids (ILs) 1-methyl-3-tetradecylimidazolium chloride ([C14MIM]Cl), 1-n-butyl-3-n-butylimidazolium chloride ([C4BIM]Cl), 1-n-butyl-3-n-tetradecylimidazolium chloride ([C14BIM]Cl), and 1-tetradecylpyridinium chloride ([C14Py]Cl) were synthesized. Sorbents in nature of supported ionic liquid phases (SILPs) were prepared by impregnating ILs on solid carriers such as silica gel, XAD-7 and XAD-4 Amberlite ion exchange resins. Pt(IV) was recovered using these sorbents with the yields over 90%, however, the amounts of used ILs are much less than those of ILs used in extraction method and the process can easily be transferred to heterogeneous phase. The Pt(IV) sorption is affected by the structure of ILs and solid carriers, the IL loading, and IL/Pt molar ratio. The highest sorption yields were observed when using [C14MIM]Cl-based SILPs. Moreover, the sorption isotherms of [C14MIM]Cl/SiO2 SILPs with different IL loadings and IL/Pt molar ratios were investigated and sorption mechanism was also proposed.

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Acknowledgements

This work was supported by the National Foundation for Science and Technology Development, Ministry of Science and Technology, Vietnam (grant number 104.01-2016.57, 2017).

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Correspondence to Thuy T. L. Bui.

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Bui, T.T.L., Uong, H.T.N., Pham, N.C. et al. Preparation and application of supported ionic liquid phases for sorption of Pt(IV) from chloride solution. Chem. Pap. 75, 1567–1579 (2021). https://doi.org/10.1007/s11696-020-01328-6

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  • DOI: https://doi.org/10.1007/s11696-020-01328-6

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