PHREEQC PHREEQC is a computer program written in the C programming language that is designed to perform a wide variety of low-temperature aqueous geochemical calculations. PHREEQC is based on an ion- association aqueous model and has capabilities for (1) speciation and saturation-index calculations; (2) batch-reaction and one- dimensional (1D) transport calculations involving reversible reactions, which include aqueous, mineral, gas, solid-solution, surface-complexation, and ion-exchange equilibria, and irreversible reactions, which include specified mole transfers of reactants, kinetically controlled reactions, mixing of solutions, and temperature changes; and (3) inverse modeling, which finds sets of mineral and gas mole transfers that account for differences in composition between waters, within specified compositional uncertainty limits.

Current Version:   2.2 License Type:   ??

Home Site: http://water.usgs.gov/software/phreeqc.html Source Code Availability:   Yes Available Binary Packages: Debian Package:   No RedHat RPM Package:   No Other Packages:   Yes Targeted Platforms: UNIX, Linux and DOS Software/Hardware Requirements: ANSI C compiler to compile from source

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