Your input file ran with version 2.4.2 (Version 2015 of PhreeqcI). https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc. It runs a little easier if you include the following at the top of the file: KNOBS -diagonal I suspect the problem is very small concentrations of iron at the given oxygen concentrations. The -diag helps scale the equations a little better. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225
Please note that some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented prior to final review and approval by the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the sole responsibility of the user.
Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
The URL of this page is:
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 1781 since Jan 22, 1998.