Synthesis and studies on core-shell type anion exchange resins based on a hybrid polymeric support

In pursuit for new materials for recovery of noble metals, novel anion exchangers, based on new type of core-shell polymeric supports have been synthesized. The designed matrices, with reactive chloromethyl groups concentrated on a surface of the polymeric base, the Amberlite XAD-4 adsorbent, have been modified using ethylenediamine and polyethyleneimine. The obtained ion exchangers were employed in processes of sorption of gold, platinum, and palladium chlorocomplexes, then, they were compared to similar resins based on volumetric polymeric supports. The studies covered porosity measurements, determination of sorption behavior in the presence of counter ions as well as kinetic and column studies. Ultimately, an attempt to access a core-shell character of the resins has been made using digital-optical microscopy. The proceeded analyses allowed to determine the localization of the resins' functionalities and their advantages over traditional ion exchange resins. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43841.