Methods for correction of selectivity of N-(2-sulfoethyl)chitosan-based materials towards platinum(IV) and palladium(II) ions |
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| Authors: | Yulia S Petrova Alexandr V Pestov Maria K Usoltseva Elena I Kapitanova Ludmila K Neudachina |
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| Affiliation: | 1. Ural Federal University Named After the First President of Russia B. N. Yeltsin, Institute of Natural Sciences and Mathematics, Yekaterinburg, Russia;2. I. Ya. Postovsky Institute of Organic Synthesis, Ural Division of Russian Academy of Sciences, Yekaterinburg, Russia |
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| Abstract: | In this paper, we report methods for correction of selectivity of sorbents based on N-(2-sulfoethyl)chitosan towards platinum(IV) and palladium(II) in HCl solutions. The common method for correction of selectivity of the sorbents is variation of their modification degree with complexing groups. An increase in the degree of sulfoethylation of the chitosan leads to the significant increase in selectivity of sorption of palladium(II) over platinum(IV). Application of the N-(2-sulfoethyl)chitosan with the highest degree of sulfoethylation allows for selective separation palladium(II) from platinum(IV) (рН = 5.0). Palladium is quantitatively desorbed from the surface of the N-(2-sulfoethyl)chitosans by 3.5 mol/dm3 solution of HCl. |
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| Keywords: | Selective sorption platinum palladium chitosan |
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