ION-INTERACTION APPROACH TO CALCULATIONS OF VOLUMETRIC PROPERTIES OF AQUEOUS MULTIPLE-SOLUTE ELECTROLYTE-SOLUTIONS

The ion interaction approach developed by Fitter wets used for the pre diction of volumetric properties of mixed electrolyte solutions at 25 degrees C based on parameters calculated from experimental data for si ngle-solute electrolyte solutions. Such an approach war shown to be es pecially effective for application to the calculation of volumetric pr operties of natural hypersaline brines and of industrial electrolyte s olutions of large complexity. The use of the latest recommended sets o f volumetric ion interaction parameters for single electrolyte solutio ns and symmetrical mixing parameters for Na-K-Cl ion combinations cons iderably improved the precision of the density calculations of highly concentrated mired electrolyte solutions and of various natural waters .