Table 2. Surface Activities of Isolated Biosurfactant Aqueous Solution (0.1%) at Different pH (2 - 12), Temperature (2 - 120 ºC) and NaCl Concentrations (2 - 12%).
| Parameters | Surface Tension, mN/m | CMD-1, mN/m | CMD-2, mN/m |
|---|---|---|---|
| pH | |||
| 4 | 34.5 | 38.2 | 46.3 |
| 6 | 32.4 | 36.7 | 43.8 |
| 8 | 34.6 | 38.8 | 46.5 |
| 10 | 36.2 | 39.4 | 48.8 |
| 12 | 36.4 | 39.4 | 49.2 |
| Temperature, ºC | |||
| 20 | 34.7 | 36.5 | 41.8 |
| 40 | 30.5 | 32.5 | 40.5 |
| 60 | 36.2 | 36.2 | 42.0 |
| 80 | 38.0 | 43.1 | 51.5 |
| 100 | 42.8 | 45.0 | 54.0 |
| 120 | 42.8 | 43.4 | 54.0 |
| NaCl, % | |||
| 2 | 36.0 | 42.1 | 49.8 |
| 4 | 36.2 | 42.0 | 53.0 |
| 6 | 38.8 | 48.0 | 56.0 |
| 8 | 45.6 | 53.4 | 59.8 |
| 10 | 48.1 | 55.4 | 60.2 |
| 12 | 48.4 | 56.6 | 60.8 |