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

Re: question: PHREEQC - pressure




There's not really a good way to account for pressure in PHREEQC. The
effect is relatively small, on the order of .1 log units in K. You can find
the partial molal volumes and correct the log K of calcite, but to do it
right, you would have to correct all the K's for all the aqueous species.
Probably all you can do is adjust the calcite K and throw a little
uncertainty into your interpretation.

David


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




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

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: http://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/mail/msg00285.html
Email:dlpark@usgs.gov
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 1330 since Jan 22, 1998.