Chemical | Time (d) | Mean culturable microbial numbers (CFUs g−1) | ||||
---|---|---|---|---|---|---|
Concentrations (mg kg−1) | ||||||
0 | 10 | 100 | 250 | 500 | ||
Phenanthrene | 0 | 1.60 × 106 | 1.25 × 106 | 0.90 × 106 | 0.97 × 106 | 0.64 × 106 |
30 | 2.25 × 106 | 2.50 × 106 | 1.90 × 106 | 1.77 × 106 | 1.23 × 106 | |
60 | 0.98 × 106 | 0.77 × 106 | 1.23 × 106 | 1.33 × 106 | 1.16 × 106 | |
90 | 1.15 × 106 | 1.5 × 106 | 1.10 × 106 | 1.23 × 106 | 1.20 × 106 | |
1,7-Phenanthroline | 0 | 1.92 × 106 | 1.25 × 106 | 0.90 × 106 | 0.90 × 106 | 0.90 × 106 |
30 | 1.35 × 106 | 1.40 × 106 | 1.60 × 106 | 1.10 × 106 | 0.98 × 106 | |
60 | 1.03 × 106 | 0.45 × 106 | 1.40 × 106 | 0.32 × 106 | 0.37 × 106 | |
90 | 1.32 × 106 | 1.50 × 106 | 1.25 × 106 | 1.23 × 106 | 0.73 × 106 | |
Benzo[h]quinoline | 0 | 0.87 × 106 | 0.65 × 106 | 0.62 × 106 | 0.55 × 106 | 0.62 × 106 |
30 | 0.60 × 106 | 0.60 × 106 | 0.78 × 106 | 0.90 × 106 | 0.73 × 106 | |
60 | 1.02 × 106 | 1.75 × 106 | 0.75 × 106 | 0.53 × 106 | 0.25 × 106 | |
90 | 0.75 × 106 | 1.40 × 106 | 0.69 × 106 | 0.51 × 106 | 0.30 × 106 | |
4,7-Phenanthroline | 0 | 1.55 × 106 | 1.00 × 106 | 0.65 × 106 | 0.35 × 106 | 0.39 × 106 |
30 | 0.5 × 106 | 1.05 × 106 | 1.00 × 106 | 0.80 × 106 | 0.75 × 106 | |
60 | 1.01 × 106 | 1.10 × 106 | 1.09 × 106 | 0.78 × 106 | 0.51 × 106 | |
90 | 0.77 × 106 | 1.00 × 106 | 0.99 × 106 | 2.01 × 106 | 1.49 × 106 |