03 - Mixing
This example corresponds to the “Example 3-Mixing” from the Phreeqc manual. It can be retrieved from the Phreeqc Website.
This example demonstrates the capabilities of PHREEQC to perform a series of geochemical simulations, with the final simulations relying on results from previous simulations within the same run. The example investigates diagenetic reactions that may occur in zones where seawater mixes with carbonate groundwater.
Studies
This project contains 1 Studies.
PhreeqcStudy: “study_03 - Mixing”
Db used: “Phreeqc_dat” database
TITLE Example 3, part A.--Calcite equilibrium at log Pco2 = -2.0 and 25C.
SOLUTION 1 Pure water
pH 7.0
temp 25.0
EQUILIBRIUM_PHASES
CO2(g) -2.0
Calcite 0.0
SAVE solution 1
END
TITLE Example 3, part B.--Definition of seawater.
SOLUTION 2 Seawater
units ppm
pH 8.22
pe 8.451
density 1.023
temp 25.0
Ca 412.3
Mg 1291.8
Na 10768.0
K 399.1
Si 4.28
Cl 19353.0
Alkalinity 141.682 as HCO3
S(6) 2712.0
END
TITLE Example 3, part C.--Mix 70% groundwater, 30% seawater.
MIX 1
1 0.7
2 0.3
SAVE solution 3
END
TITLE Example 3, part D.--Equilibrate mixture with calcite and dolomite.
EQUILIBRIUM_PHASES 1
Calcite 0.0
Dolomite 0.0
USE solution 3
END
TITLE Example 3, part E.--Equilibrate mixture with calcite only.
EQUILIBRIUM_PHASES 2
Calcite 0.0
USE solution 3
END
/n
Tables
This project contains 1 Tables.
Table 1: named “table_ex3”
pH |
log p_CO2 |
SI Calcite |
SI Dolomite |
CO2 milimole transfer |
Calcite milimole transfer |
Dolomite milimole transfer |
|---|---|---|---|---|---|---|
7 |
-999.999 |
-999.999 |
-999.999 |
0 |
0 |
0 |
7.296856082024 |
-2.000024043554 |
0 |
-999.999 |
-1.975848285925 |
-1.645418111691 |
0 |
8.22 |
-3.390282133044 |
0.7540724788991 |
2.387844623037 |
0 |
0 |
0 |
7.348880921584 |
-2.230652363083 |
-0.1041294273531 |
0.5109320599339 |
0 |
0 |
0 |
7.057403158518 |
-1.983887587846 |
0 |
0 |
0 |
-15.46272045019 |
7.810909629562 |
7.439887927281 |
-2.312242596252 |
0 |
0.7153041413087 |
0 |
-0.03965914219606 |
0 |