ADSORPTION OF PALLADIUM BY GLYCOLMETHACRYLATE CHELATING RESINS

The adsorption of Pd(II) and Cu(II) on macroporous hydrophilic glycolm ethacrylate gels with side chains containing 8-hydroxyquinoline (Spher on Oxine 1000), thiol (Spheron Thiol 1000) and salicyl groups (Spheron Salicyl 1000) has been investigated. Palladium is strongly adsorbed b y Spheron Oxine and Spheron Thiol resins from a hydrochloric medium. T he influence of pH and ionic strength has been determined. The elution of Pd(II) was carried out by using acidified thiourea or potassium th iocyanate solutions. Desorption was most effective for Spheron Oxine r esin. The kinetics of metal adsorption by Spheron Oxine 1000 was also studied. The experimental data were analyzed numerically by considerin g both the forward and the reverse reaction, and corresponding constan ts are calculated for different initial metal and resin concentrations . Separation of aqueous mixtures of Pd(II) and Cu(II) by using Spheron Oxine is discussed.