Table 1 Plackett–Burman design (PBD) of factors (in coded levels) with biodegradation of chlorpyrifos (%) as response.
Run order | Concentration | Temperature | pH | Carbon | Inoculum | Response | Predicted |
|---|---|---|---|---|---|---|---|
1 | − 1 | − 1 | + 1 | + 1 | + 1 | 82.3 | 81.3 |
2 | − 1 | + 1 | + 1 | + 1 | − 1 | 50.3 | 53.7 |
3 | + 1 | + 1 | − 1 | + 1 | + 1 | 72.4 | 62.5 |
4 | + 1 | + 1 | + 1 | − 1 | + 1 | 31.8 | 31.2 |
5 | − 1 | − 1 | − 1 | + 1 | + 1 | 79.3 | 76.5 |
6 | + 1 | + 1 | − 1 | + 1 | − 1 | 30.3 | 29.3 |
7 | − 1 | − 1 | − 1 | − 1 | − 1 | 14.2 | 7.2 |
8 | + 1 | − 1 | − 1 | − 1 | + 1 | 7.2 | 20.8 |
9 | − 1 | + 1 | + 1 | − 1 | + 1 | 50.7 | 50.7 |
10 | + 1 | − 1 | + 1 | − 1 | − 1 | 6.3 | 2.3 |
11 | − 1 | + 1 | − 1 | − 1 | − 1 | 6.7 | 12.7 |
12 | + 1 | − 1 | + 1 | + 1 | − 1 | 18.4 | 28.7 |
