Polyacrylate Ion Exchangers in Sorption of Noble and Base Metal Ions from Single and Tertiary Component Solutions

Abstract

Two polyacrylic resins of different types such as Purolite S-984 (macroporous, chelating with a polyacrylic matrix supporting functional groups of the polyamine type) and Amberlite IRA-478RF (gel, intermediate polyacrylic anion exchanger with the tertiary amine and quaternary ammonium functional groups) were applied in removal of palladium(II) metal ions from HCl and HCl – HNO3 solutions. Its sorption behaviors for base (Co(II), Ni(II), Cu(II), Ni(II)) and other noble metal (Pt(IV), Au(III)) ions, kinetics, and equilibrium studies were carried out in detail. The obtained results indicate that the resin is characterized by high sorption capacity and good kinetics of the sorption process. For the elution, the solutions of various reagents, that is, HCl, HNO3, H2SO4, NaOH, NH4OH, (NH2)2CS were studied as regards the complete release of the metal ions retained by the resin. Gold(III) could be eluted quantitatively from the loaded resin whereas Pd(II) and Pt(IV) could not by means of the applied eluting agent.