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Hi Jim,

Hope all is well in Seattle. Here's an input file that titrates the
electron acceptors with CH2O. It's split in two pieces, on adds a mmol of
CH2O to use up oxygen and nitrogen and the second part titrates the iron,
manganese, and sulfate. At the end, a few mmol of CH4 have been produced. A
spreadsheet file "redox.sel" is created which lists some of the pertinent

You may need to download the latest version of PhreeqcI from
http://www.brr.cr.usgs.gov/projects/GWC_coupled to get teh file suffixes to
automatically recognize PhreeqcI files.

Take care,


(See attached file: redox.pqi)

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

Attachment: redox.pqi
Description: Binary data

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