Determination of Pitzer Parameters for 1-1 Nitrate and 1-2 Sulfate Solutions from Freezing Point Data

Research output: Contribution to journalArticle


Research units

  • Lappeenranta University of Technology


Freezing point depression (FDP) modeling was performed for selected aqueous nitrate and sulfate salt solutions to evaluate Pitzer ion interaction parameter values at 273.15K. 1-1 and 1-2 electrolyte solutions of NaNO3, KNO3, NH4NO3, Na2SO4, K2SO4, and (NH4)2SO4 were studied. New Pitzer parameter values of β0, β1, and Cφ{symbol} were obtained for the studied electrolyte solutions. FDP modeling was also used to determine temperature derivatives of interaction parameters for the Pitzer model for selected salt solutions. Osmotic and activity coefficients using the new parameter values are also presented.


Original languageEnglish
Pages (from-to)1340-1346
Number of pages7
JournalChemical Engineering and Technology
Issue number8
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

    Research areas

  • Freeze crystallization, Freezing point depression, Ion interaction parameter, Pitzer model, Solid-liquid equilibrium

ID: 10771277