Table 3 Mineral reactions and reaction parameters.
Mineral reactions | LOG-CHEM-EQUIL-CONST for the aqueous reaction (\(Log K_{eq,\theta }\)) | Reactive surface area (m2/m3) | Rate constant at 25 °C (mol/m2s) | Activation energy (J/mol) |
|---|---|---|---|---|
1. Quartz ⇌ SiO2 (aq) | − 3.3223 | 2650 | − 11.3 | 41,870 |
2. Calcite + H+ ⇌ Ca2+ + HCO3− | 1.0056 | 2989.25 | − 5.81 | 23,500 |
3. Illite + 8H+ ⇌ 5H2O + 0.25Mg2+ + 0.6 K+ + 2.3Al3+ + 3.5SiO2(aq) | 5.4416 | 27,500 | − 12.78 | 35,000 |
4. Kaolinite + 6H+ ⇌ 5H2O + 2Al3+ + 2SiO2(aq) | 3.7698 | 28,262 | − 13.18 | 22,200 |
5. Chamosite-7A + 10H+ ⇌ 7H2O + 2Al3+ + 2Fe2+ + SiO2(aq) | 2.4533 | 2710 | − 11 | 41,870 |
6. Pyrite + H2O ⇌ 0.25H+ + 0.25SO42− + Fe2+ + 1.75HS− | − 2.2225 | 2710 | − 8.8 | 41,870 |
