Good day David, I'm trying to use PHREEQCi to model the effect of adding lye to a sedimentation pond. My approach is to specify the pond as "Solution 1" and the lye as "Solution 2" and then use the "Mix" command to mix these solutions in various ratios to see the resulting pH change and precipitates. The lye consists of a 50 wt% NaOH solution (19.125 molar, pH = 15.6). Since lye / NaOH is not listed in the "Individual element input" window of the "Solution" menu I attempted to add it using the "Solution Species" and "Solution Master Species" menus. However, I end up with convergence errors for lye and the activity of water, not to mention a terrible charge imbalance for Solution 2. I've attached my input file. If you have time, could you please take a look and let me know what I'm doing wrong and suggest some ways to overcome my problems? Thanks! Shane Matolyak Maxim Technologies, Inc. Bozeman, MT(406) 582-8780
Description: MS-Word document
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 3540 since Jan 22, 1998.