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Determination of Pitzer Parameters for 1‐1 Nitrate and 1‐2 Sulfate Solutions from Freezing Point Data
Author(s) -
Hasan Mehdi,
LouhiKultanen Marjatta
Publication year - 2014
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201400202
Subject(s) - pitzer equations , chemistry , electrolyte , salt (chemistry) , thermodynamics , freezing point , freezing point depression , aqueous solution , sulfate , sodium sulfate , activity coefficient , sodium nitrate , inorganic chemistry , sodium , physics , organic chemistry , electrode
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 NaNO 3 , KNO 3 , NH 4 NO 3 , Na 2 SO 4 , K 2 SO 4 , and (NH 4 ) 2 SO 4 were studied. New Pitzer parameter values of β 0 , β 1 , and C ϕ 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.