Abstract
Ion exchange characteristics of gel-type, macroporous and nuclear grade strongly acidic cation exchange resins from three Indian manufacturers were evaluated for their efficacy to remove Cs and Sr ions from aqueous solution, which has relevance to the treatment of Low level Liquid Waste (LLW) streams. The alkali metal ion- hydrogen ion exchange equilibria were studied by batch technique at a total ionic strength of 0.1 mol dm 3. The rational equilibrium constants were determined after incorporating activity coefficient corrections. The selectivity showed the sequence: Cs+>K+>Na+>Li+ with respect to H+, indicating that unhydrated ions were preferred. The log Kc vs NM (equivalent fraction in the resin phase) plots indicated the heterogeneity in the resin phase and formation of clusters. The gel type resins showed better selectivity for Cs ion.
