Table 4. Interfacial Tension of Oil and Water with Stable Nanoparticles Containing Different Concentrations of MgSO4 and CaCl2 and 500 ppm of Nano-γ-Al2O3, -MgO, and -TiO2 at Ambient Pressure and 75 °C.
| |
IFT (mN/m) ± 0.2 |
|||
|---|---|---|---|---|
| nanoparticles | TiO2 | MgO | γ-Al2O3 | |
| MgSO4 conc. (ppm) | 500 | 10.347 | 6.545 | 11.273 |
| 1000 | 8.051 | 5.131 | 10.317 | |
| 2000 | 7.362 | 4.684 | 9.650 | |
| 10 000 | 11.431 | 9.923 | 10.212 | |
| CaCl2 conc. (ppm) | 500 | 14.731 | 12.950 | 15.922 |
| 1000 | 12.407 | 12.125 | 14.157 | |
| 2000 | 8.173 | 7.645 | 9.131 | |
| 10 000 | 9.256 | 13.912 | 10.755 | |