ANION-EXCHANGE SEPARATION OF LEAD FROM OTHER ELEMENTS IN NITRIC ACID-ORGANIC SOLVENTS MEDIA

The anion exchange chromatographic technique has been employed for the separation of Pb(II), from some divalent and trivalent metal ions usi ng Dowex 2-X8 exchange resin (nitrate form). The effect of metal ion c oncentration on the distribution coefficients (K-d) have been investig ated and a suitable media is selected. The batch distribution coeffici ent has been determined for Mg(II), Co(II), Fe(III), Cd(II) and Pb(II) ions using different concentrations of nitric acid and different prop ortions of ethanol and acetone. The results showed that lead is adsorb ed much more strongly in the exchanger used than the most other elemen ts.