Category Geochemistry
Platform DOS
Status Public domain
Description MINTEQA2 is a geochemical equilibrium speciation model for dilute aqueous systems. The model can be used to calculate the mass distribution between the dissolved, adsorbed, and multiple solid phases under a variety of conditions including a gas phase with constant partial pressure. Seven adsorption models are available. Input data consist of total dissolved concentrations for the components of interest, and optionally, parameters such as pH, pe, or the partial pressure of one or more gases. A measured value of pH and/or pe may be specified as equilibrium values, or the program can calculate equilibrium values. A mineral may be specified as at equilibrium with the solution and either subject to dissolution if conditions warrant, or not subject to complete dissolution. Extensive thermodynamic database that is adequate for solving a broad range of problems without need for additional user-supplied equilibrium constants. The standard database can also be modified by the user if necessary. Interactive pre-processor PRODEFA2, prepares input data files. The program produces tabular and graphical output.
Cost US Dollars 75
Data formats supported None stated
Supplier in United States of America  International Ground Water Modeling Center 
Supplier in United States of America  Scientific Software Group 

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