Table 3 Degradation rate of petroleum pollutants under different treatment of exogenous substances
No. | Treatment | Petroleum hydrocarbon content before strengthening (g/kg) | Petroleum hydrocarbon content after strengthening (g/kg) | Degradationrate (%) |
|---|---|---|---|---|
CK | Natural attenuation | 15 | 8.63 | 42.46 |
YM | Addition of corncob | 15 | 6.21 | 58.63 |
DD | Addition of soybean straw | 15 | 3.89 | 74.06 |
NT | Addition of litter leaves of Caragana korshinskii | 15 | 5.68 | 62.13 |