Dear Prof. Dr. David Parkhurst U.S. Geological Survey, Denver, Colorado. Once more I ask your kind help to understand the comprehensive PHREEQC-2.7 program. Let me tell you first that I am not well familiar with your modern higher kinetics, but I promise to follow your instructions. I noticed the following points: 1) When I entered the seawater chemical analysis of NORDSTROM into the PHREEQC-2.7, the obtained results – ex. Saturation indices - were different from those described in the pdf-Example-1 (without U). 2) When I checked the molal concentration of the mineral species, it was found that the minor Fe, Mn & Si minerals are given in higher amounts. I don’t know, may my simple calculations are wrong. 3) I tried to correlate the obtained PHREEQC-2.7 data with the classical simplified “Probable Salt Combination Model” but the difference still very big. Attached herewith my calculation sheet. I am sure that you are so busy, and not expect an early reply. Best regards, Samir El-Manharawy |
Attachment:
SW_NORDSTROM-PHRQ1.XLS
Description: application/msexcel
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/msg00578.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.