| First cycle | ||||
| Experience condition | Culture with Fe/SiO2 10−4 M | Positive control | ||
|
| pellet | supernatant | pellet | supernatant |
| Biphenyl biodegradation yield (%) | 90 | 64 | 55 | 56 |
| Optical density | 1.60 ±0.07 | 0.85 ±0.04 | 0.75 ±0.06 | 0.73 ±0.07 |
| Total iron (M) | 9.2 10−5 ± 0.01 | 2.010−5 ± 0.01 | 6 10−6 ± 0.01 | 2 10−6 ± 0.01 |
| Second cycle | ||||
| Experience condition | Culture with Fe/SiO2 10−4 M | Positive control | ||
|
| pellet | supernatant | pellet | supernatant |
| Biphenyl biodegradation yield (%) | 84 | 65 | 58 | 57 |
| Optical density | 1.54 ± 0.09 | 1 ± 0.08 | 0.76 ± 0.06 | 0.74 ± 0.09 |
| Total iron (M) | 8.6 10−5 ± 0.01 | 3.0 10−5 ± 0.03 | 4 10−6 ± 0.02 | 3 10−6 ± 0.01 |
| Third cycle | ||||
| Experience condition | Culture with Fe/SiO2 10−4 M | Positive control | ||
|
| pellet | supernatant | pellet | supernatant |
| Biphenyl biodegradation yield (%) | 82 | 69 | 57 | 56 |
| Optical density | 1.52 ± 0.06 | 1.00 ± 0.09 | 0.76 ± 0.06 | 0.75 ± 0.07 |
| Total iron (M) | 8.1 × 10−5 ± 0.01 | 6.0 × 10−5 ± 0.01 | 5 × 10−6 ± 0.00 | 3 × 10−6 ± 0.02 |