Volume 37, Issue 8 pp. 1340-1346
Research Article

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

Mehdi Hasan

Corresponding Author

Mehdi Hasan

Department of Chemical Technology, Lappeenranta University of Technology, Lappeenranta, Finland.

Department of Chemical Technology, Lappeenranta University of Technology, Lappeenranta, Finland.===Search for more papers by this author
Marjatta Louhi-Kultanen

Marjatta Louhi-Kultanen

Department of Chemical Technology, Lappeenranta University of Technology, Lappeenranta, Finland.

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First published: 24 July 2014
Citations: 5

Abstract

Freezing point depression (FDP) modeling was performed for selected aqueous nitrate and sulfate salt solutions to evaluate Pitzer ion interaction parameter values at 273.15 K. 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 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.

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