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 Sr ion from aqueous solution, which has relevance to the treatment of Low level Liquid Waste (LLW) streams. In order to achieve this goal in proper perceptive, the alkaline earth 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 log Kc vs NM (equivalent fraction in the resin phase) plots indicated the heterogeneity in the resin phase and formation of clusters. All the resins showed unusually high selectivity for Ca2+ rather than Ba2+. This could be due to the fact that all the resins are tailor made for the demineralisation process, which requires the removal of chiefly Ca ions.
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