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Re: PHREEQC help




I think this is closer to what you want. I don't know what HEPES is, so I
haven't filled it in. The pHs of the solutions are guessed from the
composition, if they are adjusted to a certain pH, then that information
should be used.

David


TITLE  Equilibrate water with growth media
SOLUTION_MASTER_SPECIES
Glucose     Glucose     0.0   C6H12O6     180
SOLUTION_SPECIES
      Glucose = Glucose
      logk 0
SOLUTION 1 PURE WATER
pH       7.0
temp    25.0
SOLUTION 2 1 M (NH4)2SO4
      -units mol/kgw
      pH    7     charge
      N(-3) 2
      S(6)  1
SOLUTION 3 .1 M MgSO4
      -units mol/kgw
      pH    7     charge
      Mg    0.1
      S(6)  0.1
SOLUTION 4 .2 M CaCl2
      -units mol/kgw
      pH    7     charge
      Ca    0.2
      Cl    0.4
SOLUTION 5 .1 M KH2PO4
      -units mol/kgw
      pH    7     charge
      K     0.1
      P     0.1
SOLUTION 6 .1 M Na2HPO4
      -units mol/kgw
      pH    7     charge
      Na    0.2
      P     0.1
SOLUTION 7 .01 M FeSO4
      -units mol/kgw
      pH    7     charge
      Fe    0.01
      S(6)  0.01

SOLUTION 8 1 M HEPES

SOLUTION 9 .1 M Glucose
      -units mol/kgw
      Glucose  0.1
END

MIX 10    Mixing solutions 1-9
 1  0.9675                                #Add 967.5 mL DI Water
 2  0.002                                 #Add 2 mL (NH4)2SO4
 3  0.0025                                #Add 2.5 mL MgSO4
 4  0.002                                 #Add 2.0 mL CaCL2
 5  0.0015                                #Add 1.5 mL KH2PO4
 6  0.0025                                #Add 2.5 mL Na2HPO4
 7  0.001                                 #Add 1.0 mL FeSO4
 8  0.001                                 #Add 1.0 mL HEPES
 9  0.010                                 #Add 10.0 mL Glucose

SAVE solution 11
EQUILIBRIUM_PHASES
CO2(g)  -3.5

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




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