Gypsum and Anhydrite solubility calculation with Phreeqc and Python – Tutorial

Hydrate

Tutorial for the calculation of the solubility and thermodynamic stability of gypsum and anhydrite. The example simulates the dissolution of two minerals in a beaker at equilibrium, and the beaker is heated step-wise from 25ºC to 75ºC. Concentrations and saturation indices for the initial solution and the batch reaction are shown as Pandas dataframes and plotted as bar diagrams on a Jupyter Notebook. Finally a plot of the saturation index for anhydrite and gypsum with temperature is generated from an iteration over the batch reaction steps.

This tutorial is based on the first part of exercise 2 from the Phreeqc3 documentation:

https://water.usgs.gov/water-resources/software/PHREEQC/documentation/phreeqc3-html/phreeqc3-64.htm

Tutorial

Input data

You can download the input data from this link.

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