Table 1.
Molar mass balance of PCBs in unplanted soil (UP), switchgrass treated soil (SG), unplanted with bioaugmentaion soil (UP B), switchgrass treated with bioaugmentation soil (SG B), and switchgrass treated with bioaugmentation with dead LB400 soil (SG BD) after 24 weeks of incubation. Results were the reported as mean ± standard deviation (n=3).
| PCB fraction in soils | PCB fraction in roots | PCB fraction in shoots | Total recovery | ||
|---|---|---|---|---|---|
| Overall | UP | 70.6 ± 4.1% | - | - | 70.6 ± 4.1% |
| SG | 60.1 ± 2.0% | 7.3 ± 0.3% | 0.11 ± 0.01% | 67.5 ± 2.3% | |
| UP B | 60.6 ± 2.5% | - | - | 60.6 ± 2.5% | |
| SG B | 52.7 ± 2.1% | 4.3 ± 0.2% | 0.24 ± 0.03% | 57.3 ± 2.3% | |
| SG BD | 57.1 ± 10.6% | - | - | 57.1 ± 10.6% | |
|
| |||||
| PCB 52 | UP | 98.6 ± 4.8% | - | - | 98.6 ± 4.8% |
| SG | 81.9 ± 2.4% | 9.4 ± 0.3% | 0.17 ± 0.01% | 91.4 ± 2.7% | |
| UP B | 54.8 ± 1.8% | - | - | 54.8 ± 1.8% | |
| SG B | 57.0 ± 2.4% | 4.7 ± 0.2% | 0.40 ± 0.05% | 62.2 ± 2.5% | |
| SG BD | 76.7 ± 14.9% | - | - | 76.7 ± 14.9% | |
|
| |||||
| PCB 77 | UP | 61.0 ± 4.9% | - | - | 61.0 ± 4.9% |
| SG | 53.2 ± 2.8% | 6.0 ± 0.3% | 0.06 ± 0.01% | 59.2 ± 3.0% | |
| UP B | 62.1 ± 3.4% | - | - | 62.1 ± 3.4% | |
| SG B | 53.1 ± 2.9% | 3.8 ± 0.3% | 0.16 ± 0.02% | 57.1 ± 3.1% | |
| SG BD | 51.1 ± 9.7% | - | - | 51.1 ± 9.7% | |
|
| |||||
| PCB 153 | UP | 66.1 ± 4.2% | - | - | 66.1 ± 4.2% |
| SG | 56.5 ± 2.9% | 8.2 ± 0.5% | 0.11 ± 0.02% | 64.8 ± 3.4% | |
| UP B | 69.7 ± 3.9% | - | - | 69.7 ± 3.9% | |
| SG B | 53.2 ± 2.8% | 5.0 ± 0.3% | 0.17 ± 0.02% | 58.4 ± 3.1% | |
| SG BD | 53.7 ± 9.4 % | - | - | 53.7 ± 9.4 % | |