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
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 913 since Jan 22, 1998.