Retention behaviour of some heavy metal ions on cation exchange papers based on cerium (IV)

The retention behaviour of some heavy metal ions have been studied on papers impregnated with Cerium (IV) based cation exchanger in aqueous HCl and mixed solvent systems containing dimethyl sulphoxide (DMSO). A variety of separations have been achieved and the Alberti equation, in the modified form –n log ak+ = RM+ constants (aK+ = activity of K+) have been verified. The effect of the concentration of impregnating reagents on these papers have been determined and compared with other papers. The effect of composition of impregnated papers on Rf values of metal ions has also been examined in different solvent systems. The separation of Zn2+ from Hg2+, Pb2+ from UO22+, Pb2+ from Cd2+ and ternary separation of Pb2+, Bi3+ and Hg2+; and Pb2+, Bi3+ from UO22+ are of special interest.

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