Table I 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 - T r ) + a3 In(T/T r ) + a4(T - T r ).
From: Deliquescence of NaCl–NaNO3, KNO3–NaNO3, and NaCl–KNO3salt mixtures from 90 to 120°C
Ion interactions | Pitzer interaction parameters | Reference | ||||
|---|---|---|---|---|---|---|
Coefficients | a 1 | a 2 | a 3 | a 4 | ||
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 | |||||
| 0.00 | |||||
| 6.60 × 10-03 | |||||
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 | ||
| 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 | ||
| 0.00 | |||||
| -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 | |||
K–Na–Cl |
| -3.69 × 10-03 | -5.10 | -3.41 × 10-13 | 6.66 × 10-16 | 10 |
