Sorption of palladium(II) complexes onto the styrene-divinylbenzene anion exchange resins

The sorption behaviour of palladium(II) complexes onto the strongly basic styrene-divinylbenzene anion exchange resins of type 1 (Dowex MSA-1) and type 2 (Dowex MSA-2) from the chloride and chloride-nitrate solutions was investigated. The breakthrough curves of Pd(II) were determined and the mass and bed distribution coefficients, the working anion exchange capacities as well as the amount of palladium(II) complexes sorbed onto the anion exchangers under discussion were calculated. The effect of the phases contact time, hydrochloric and nitric acids and sodium chloride concentrations onto the sorption process was studied. The FT-IR spectra of pure anion exchangers and those loaded with palladium(II) complexes were recorded, too. The FT-IR spectra confirmed the difference in the composition of resin's functional groups and in Pd(II) binding additionally by means of 0 atoms involved in functional groups of Dowex MSA-2. The highest working anion exchange capacity is observed in the 0.1 M HCl solution; 0.0616 and 0.0583g/cm(3) for Dowex MSA-1 and Dowex MSA-2, respectively. Both anion exchange resins can be efficiently applied in sorption of Pd(II) complexes. (C) 2009 Elsevier B.V. All rights reserved.