Abstract
A method for the preparation of packed-bed columns made of gelled beads is described. The stable gelled beads composed of dialkyldithiocarbamate- or dialkyldithiophosphate-substituted poly(vinyl chloride) and di(2-ethylhexyl)dithiophosphoric acid were capable of the selective separation of metal ions. The stoichiometries of Ag +/H + and Cd 2+/H + extraction were established to be 3:1 and 2:1, respectively. A simple model of Ag + extraction kinetics was correlated with the experimental data. The selectivity of metal separations in displacement and elution chromatography was demonstrated.
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