[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: PhreeqC version 2 bugs?




> When I try to equilibrate Hematite (Fe2O3) in pure water (pH=7, temp=25)
using EQUILIBRIUM_PHASES data block, I get the following messages:

If it does not say "ERROR" anywhere in the file, then it should be ok.
PHREEQC has a hard time with solutions that have no redox buffering (pure
water) and with small concentrations (<1e-13). Your problem has both. You
can get rid of the warnings if you include the following in your input
file:

SOLUTION_SPECIES
      H2O + 0.01e- = H2O-0.01
      log_k -9

Adding this species generates some redox buffering.


> I get input errors when I try to do multiple reactions in NaOH solutions,
but runs fine with HCl.  What's going on?


I don't know. If you send the file with errors, I can probably tell you.


David


David Parkhurst (dlpark@xxxxxxxx)
U.S. Geological Survey
Box 25046, MS 413
Denver Federal Center
Denver, CO 80225

Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled




Project Home Page
Complete Water Resources Division Software
USGS Home Page
Water Resources Division Home Page
NRP Home Page
Help Page
USGS Privacy Statement       

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: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/mail/msg00536.html
Email:dlpark@usgs.gov
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number [an error occurred while processing this directive] since Jan 22, 1998.