Table 2. Degradation kinetic data of DDT by the isolate DDT-1 at different substrate concentrations, temperatures, and pH values.
| Concentration (mg/l) | Temperature (°C) | pH | Kinetic function | Degradation rate (mg/l/d) | DT50 * (d) | r2 |
|---|---|---|---|---|---|---|
| 0.1 | 30 | 7.0 | C = 0.0937e−0.1744*t | 0.004 | 4.0 a § | 0.84 |
| 1.0 | 30 | 7.0 | C = 0.7941e−0.0856*t | 0.038 | 8.1 b | 0.92 |
| 10.0 | 30 | 7.0 | C = 9.5835e−0.0084*t | 0.086 | 82.5 c | 0.92 |
| 1.0 | 15 | 7.0 | C = 0.9098e−0.03916*t | 0.022 | 17.7 d | 0.97 |
| 1.0 | 25 | 7.0 | C = 0.8911e−0.04433*t | 0.024 | 15.6 e | 0.98 |
| 1.0 | 35 | 7.0 | C = 0.9322e−0.06017*t | 0.034 | 11.5 f | 0.99 |
| 1.0 | 30 | 5.0 | C = 0.8839e−0.05761*t | 0.032 | 12.0 f | 0.97 |
| 1.0 | 30 | 7.0 | C = 0.8707e−0.0908*t | 0.038 | 7.6 b | 0.91 |
| 1.0 | 30 | 9.0 | C = 0.8761e−0.06264*t | 0.033 | 11.1 f | 0.97 |
*DT50: the degradation half-lives of DDT; §: data followed by a different letter in the same column are significantly different (p ≤ 0.05).