Phreebooks

PhreeqC: Geochemical Aqueous Solutions Modeling and Calculations

PhreeqC is free open source software designed for geochemical aqueous solutions modeling and calculations. It can perform a wide variety of calculations including reaction path, speciation and saturation index, reaction and mixing, advective transport, inverse modeling, and more.

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Phreeqc (or PhreeqC) is a geochemical modeling program designed to perform a wide variety of low temperature aqueous geochemical calculations. It is based on an ion-association aqueous model and can calculate various geochemical processes including speciation and saturation index, reaction path modeling, mixing of solutions, advective and diffusive transport, inverse geochemical modeling, and more.

Some key features and capabilities of Phreeqc include:

• Simulating equilibrium between waters, minerals, gases, solid solutions, exchangers, and surface complexes
• Speciating aqueous solutions and calculating saturation indices
• Modeling kinetic reactions with rate equations
• Modeling advection and dispersion in 1D reactive transport
• Performing inverse modeling to determine sets of mineral and gas mole transfers that account for differences in composition between waters
• Modeling microbial reactions with Monod kinetics based on cell biomass
• Interfacing with other programs for multiprocess modeling

Phreeqc is implemented in C++ and can be run through a graphical user interface, command line, or be called from other programs. It is designed primarily for low temperature geochemical processes relevant to contaminated sites, natural waters, wastewater, and mining. With its variety of capabilities, customization options, and free open source code, Phreeqc is used widely in academic research and industry applications.

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