PHREEQC version 3

Most important new features (relative to version 2.18):

  • Precise calculation of gas-solubilities with the Peng-Robinson Equation of State.
  • Pressure effects on mineral solubilities.
  • Multiple USER_GRAPH's with flexible -plot_xy function.
  • INCLUDE$ that allows to read in other files into the input file, and to execute them.
  • .._MODIFY keywords that permit to change any model property.

Goto the download site, with the install file for phreeqc version 3.

Notepad++ is recommended for writing, editing and running PHREEQC3 input files. It provides:

   • syntax highlighting
   • autocompletion
   • calltips for BASIC functions and KEYWORDS
   • colored numbers (1 and l are differently colored!)
   • bracket matching: print (1 + 9.0) / (9 + 1.0)|
   • (un)commenting multiple lines at once
   • column editor for easy BASIC line renumbering
   • shortcuts: e.g., Ctrl+F6 calls PHREEQC on the current file
   • file recognition on extension: .ppi .pqi .phrq .phr .dat .out
   • comments and sections in between '#[' and '#]' can be folded up.

An adapted version of Notepad++ will be installed along with phreeqc version 3 by the installer, see the download site.

• PHREEQC help lets you make a quick start.
NOTE... first right-click on the saved file, select Properties, Unblock, Apply, OK. Then, open it, left-clicking on the file.
(Or, download PHREEQC help as zip and unzip.)

This file is also extracted in c:\phreeqc\manual by phreeqc3.Installer.exe.

In Notepad++, press Alt+F6 to start the help.

PHREEQC help

• David Parkhurst's site has other PHREEQC versions and the phreeqci GUI, IPhreeqc and phreeqcRM modules for coupling Phreeqc with Python, Excel, and other codes.
https://github.com/usgs-coupled/ has the newest versions.

• Vincent Post's PHREEQC-2 for WINDOWS uses the obsolete version 2.18, but the interface is inviting and the keyword templates may be helpful when starting.

• David Kinniburgh's PhreePlot allows to make accurate pe-pH diagrams and has a wealth of options for plotting other chemical data, for example:

pe-pH-As pe-pH-As+sorbed species As sorbed species as function of P_CO2 and PO4
And, the list species app (lsp) is very useful for analysing and comparing PHREEQC database files. It helps to count and view the species defined within a file at several levels of detail. It also can trim and tidy up existing database files.

«—