> You have solved my problem, but the question still remains: How does PHREEQC recognize a reductant in the CH2O (this compound had not been defined in database)? Does PHREEQC check a valency of each element? PHREEQC simply increments the total number of moles of C, H, O in the aqueous phase by the amount defined by the formula and reaction amount given in REACTION. In other words, it parses the formula that you give it for the elements and element stoichiometry and then adds these to the solution in the specified amounts. 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 1905 since Jan 22, 1998.