Table I |
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|
Pitzer interaction parameters used with EQ3/6 to calculate relative humidity and solution composition in saturated brines containing Na, K, Cl, and NO3. Temperature dependence of each of these ion interaction parameters is derived from Eq. (11): χ(T) = a1 + a2/(T - Tr) + a3 In(T/Tr) + a4(T - Tr). |
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| Ion interactions |
Pitzer interaction parameters |
Reference |
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|
|
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| Coefficients |
a1 |
a2 |
a3 |
a4 |
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|
|
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| K–Cl |
 |
4.78 × 10-02 |
-3.43 × 10+02 |
-1.38 |
1.34 × 10-03 |
10 |
 |
2.16 × 10-01 |
-5.76 × 10+02 |
-2.88 |
4.64 × 10-03 |
||
 |
0.00 |
|||||
 |
-7.49 × 10-04 |
3.65 × 10+01 |
1.48 × 10-01 |
-1.47 × 10-04 |
||
| K–NO3 |
|
-8.16 × 10-02 |
9 |
|||
|
4.94 × 10-02 |
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|
0.00 |
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|
6.60 × 10-03 |
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| Na–Cl |
|
7.46 × 10-02 |
-4.71 × 10+02 |
-1.85 |
1.66 × 10-03 |
10 |
|
2.75 × 10-01 |
-5.21 × 10+02 |
-2.88 |
4.71 × 10-03 |
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|
0.00 |
|||||
|
1.54 × 10-03 |
4.81 × 10+01 |
1.75 × 10-01 |
-1.56 × 10-04 |
||
| Na–NO3 |
|
3.57 × 10-03 |
-7.03 × 10+02 |
-3.35 |
3.98 × 10-03 |
11 |
|
2.32 × 10-01 |
-2.73 × 10+03 |
-1.30 × 10+01 |
2.07 × 10-02 |
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|
0.00 |
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|
-4.15 × 10-05 |
6.48 × 10 +01 |
3.18 × 10-01 |
-3.84 × 10-04 |
||
| K–Na |
 |
-3.20 × 10-03 |
1.40 × 10+01 |
9.09 × 10-13 |
-2.66 × 10-15 |
10 |
| Cl–NO3 |
 |
1.60 × 10-02 |
9 |
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| K–Na–Cl |
 |
-3.69 × 10-03 |
-5.10 |
-3.41 × 10-13 |
6.66 × 10-16 |
10 |
|
|
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|
Carroll et al. Geochemical Transactions 2005 6:19 doi:10.1186/1467-4866-6-19 |
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