COMPARISON OF THE CHELATING ION-EXCHANGE PROPERTIES OF DYE-COATED CELLULOSE AND POLYSTYRENE SUBSTRATES FOR THE SEPARATION AND DETERMINATIONOF TRACE-METALS FROM AQUEOUS-MEDIA

The following paper describes the comparison of a number of dye impreg nated polystyrene resins and dye coated cellulose for the chelating io n exchange of metal ions. Dye loadings, capacity factors, metal adsorp tion capacity and selectivities were measured. The cellulose substrate was found to have a strong affinity for copper but had a very low cap acity. Of the polystyrene resins, highly cross-linked macronets gave t he highest metal adsorption capacities. For one of the resins, an exam ple of a separation of a synthetic mixture of alkaline earth metals in high ionic strength media is described.