Geothermal-Brine Modeling - Prediction of Mineral Solubilities in Natural Waters: The Na-K-Mg-Ca-H-Cl-SO sub 4 -OH-HCO sub 3 CO sub 3 -CO sub 2 -H sub 2 O System to High Ionic Strengths at 25 exp 0 C

摘要

The mineral solubility model of Harvie and Weare (1980) is extended to the eight component system, Na-K-Ca-Mg-H-Cl-SO sub 4 -OH-HCO sub 3 -CO sub 3 -CO sub 2 -H sub 2 O at 25 exp 0 C to high concentrations. The model is based on the semi-empirical equations of Pitzer (1973) and co-workers for the thermodynamics of aqueous electrolyte solutions. The model is parameterized using many of the available isopiestic, electromotive force, and solubility data available for many of the subsystems. The predictive abilities of the model are demonstrated by comparison to experimental data in systems more complex than those used in parameterization. The essential features of a chemical model for aqueous electrolyte solutions and the relationship between pH and the equilibrium properties of a solution are discussed. (ERA citation 08:033577)