The Pitzer model was applied to correlate the mean ionic activity coefficients of 39 single aqueous electrolytes of 2-1 type using experimental data from literature. The model parameters for all the electrolytes studied were evaluated by minimizing the objective function using a computer code in FORTRAN language. The standard deviations of the fit for all the systems studied are compared with those obtained from various local composition models such as the electrolyte NRTL model, the electrolyte NRTL-NRF model, the electrolyte Wilson model and the modified Wilson model for electrolytes. The results show that the Pitzer model can correlate the experimental data accurately. Moreover, this model shows its superiority with respect to the other thermodynamic models.
Boukhalfa, N., & Méniai, A. H. (2016). Thermodynamic Modeling of Aqueous Electrolytes Type 2-1. In Procedia Engineering (Vol. 148, pp. 1121–1129). Elsevier Ltd. https://doi.org/10.1016/j.proeng.2016.06.560