Re: A question about One-Dimensional Transport!

["David L Parkhurst" <dlpark@xxxxxxxx>]

> I have a problem that I'll like to model with Phreeqc. The transport
pathway should consist of ten cells having (two) different compositions.
Futhermore in some of the cells a kinnetic reaction will occur.

For example:

> Cell 1-2: dissolution of UO3
> cell 3-4: dissoltion of UO3 and UO2
> Cell 5-10: reduction of organic carbon (CH2O - kinetic reation)

> In this case an initial solution (rain water) going trough the ten cells
will be modified during the transport (precipitation of UO2 ist expected, I
modeled it in batch but I'll be satisfied to observed it in a dynamic
system).

> The example I've found on your site are dealing with cases where cells
1-10
als quite identical.

You can define each cell to contain different sets of equilibrium_phases
and kinetic reactions. The last definition in the series will be used in
the column. The following is a rough outline of the input file you need.

SOLUTION 0-10 Rainwater
END
USE solution 0
EQUILIBRIUM_PHASES 1-2
      UO3   0     .1
SAVE solution 1-2
END
USE solution 0
EQUILIBRIUM_PHASES 3-4
      UO3   0     .1
      UO2   0     .1
SAVE solution 3-4
END
KINETICS 5-10
      Organic_decay
      ...
END
TRANSPORT
      ...
END




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

Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled