Solvent Extraction and Ion Exchange · 1996 · 21 citations · 16 references
Natural SciencesChemical EngineeringChemistryElectrochemistryInorganic ChemistryPhysical ChemistryElectrolyte SolutionsIon ExchangeIon Transport In ElectrolytesPhase EquilibriaSolution ChemistryThermodynamics Of Phase EquilibriaBinary InteractionBinary Interaction ParametersCation ExchangeCation Exchange EquilibriaCation Exchange EquilibriumEquilibrium ConstantsInteraction ParametersIon Exchange Equilibria
ABSTRACT Using a semi-empirical model developed previously by the authors the cation exchange equilibria within the ternary H+ - Na+; - K+ system, and the quaternary H+ -Na+ - K+ - Ca++ system were investigated. Non-idealities in the solution phase are considered by applying Pitzer's model for electrolyte behaviour while the resin phase activity coefficients are calculated by applying Wilson's model. Using the equilibrium constants and two binary interaction parameters determined experimentally for each of the constitutive binary systems, the equilibrium behaviour for the ternary and quaternary are predicted. The average deviations are all of smaller magnitude than the experimental error for the ternary and quaternary ion exchange systems studied.
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