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

Re: redox modelling




PHREEQC does not use the special approach to redox that was used in
PHREEQE(1980). Redox is now handled directly by including mole-balance
equations on H and O and a charge-balance equation.  These equations are
sufficient to correctly handle redox problems.

Sorry, but I just threw out the last of the 1980 report, but it really is
obsolete.

David

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


                                                                                                                  
                      "Bruno Haerens"                                                                             
                      <bruno.haerens@xxxxxxxx         To:      <dlpark@xxxxxxxx>                                  
                      uven.ac.be>                     cc:                                                         
In-Reply-To: <000901c178c3$5a604920$0c78210a@xxxxxxxxxxxxxxxxxx>
                                                      Subject: redox modelling                                    
                      11/29/01 03:48 AM                                                                           
                      Please respond to                                                                           
                      bruno.haerens                                                                               
                                                                                                                  
                                                                                                                  



Dear David,

Doing research in reactive transport modeling, I was reading the PHREEQC
manual looking for the appraoch used for the redox modelling and the
mathematical formulation of it, but I didn't find this in the manual
(1999).
In an article of Liu and Narasimhan, the authors refer to Parkhurst et al,
1980 when describing the internal approach for modeling redox reactions.
Is this approach still used in PHREEQC? and is it still possible to
get/order a copie of the 1980 USGS report?

Best regards,

Bruno

Bruno Haerens
Hydrogeology & Engineering Geology
Dpt. Geography-Geology
Katholieke Universiteit Leuven
Redingenstraat 16
B-3000 Leuven (Belgium)
tel. +32-(0)16-326449
fax. +32-(0)16-326401
http://www.kuleuven.ac.be/geology/hsg/H&EG/H&EG.html








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/msg00360.html
Email:dlpark@usgs.gov
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 1169 since Jan 22, 1998.