PHREEQC was not really designed to generate entire Eh-pH diagrams. It is a reaction model and it can be used to make Eh-pH diagrams, but it is not easy. Example 8 in the manual shows a way to generate fixed pH points on a diagram, a similar definition of fix_e- could be used to adjust pe, and they could be used simultaneously to scan across a diagram. So you can probably get what you want, but it could be a lot of work. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Michele Y Crouse To: David L Parkhurst/WRD/USGS/DOI@xxxx 09/07/01 10:13 cc: gs-w_h2osoft@xxxxxxxx In-Reply-To: <OFFFE31DAD.D8E5825E-ON85256AC0.005E88AB@xxxxxxxx> AM Subject: ----- Forwarded by Michele Y Crouse/WRD/USGS/DOI on 09/07/01 01:12 p.m. ----- "Marina Anissimova" To: <h2osoft@xxxxxxxx> <anissimo@xxxxxxx cc: In-Reply-To: <OFFFE31DAD.D8E5825E-ON85256AC0.005E88AB@xxxxxxxx> ni-bonn.de> Subject: One question about PHREEQC, Bonn 09/07/01 08:49 a.m. Dear Sirs, We work at the Institute of Soil Science, University of Bonn, and we try to use the Phreeqc Interactive 2.4.2 Alpha to make Eh-pH diagrams, but, unfortunatelly, it is not successful, because we have never used it before und have not some example to verify our steps. Possibly, we can not understand some options or steps correctly. Could you please inform us, is this program suitable for Eh-pH diagrams and how we can find (if possible) some explanation or example to make this procedure? Thank you very much, Sincerely Yours, Marina Anissimova ==================== Dr. Marina A. Anissimova Department of Soil Science University of Bonn Nussallee 13 D-53115 Bonn, Germany Tel: +49 (228) -732779 Fax: +49 (228) -732782 E-mail: anissimo@xxxxxxxxxxxxxxxxx
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