Table 2.
Descriptive statistics of soil indices and 11 PAH concentrations in the study area.
| Indicator/Compound | Min | Max | Mean | SD | CV (%) |
|---|---|---|---|---|---|
| Salinity (‰) | 0.16 | 35 | 2.9 | 5.5 | 190 |
| TK (g/kg) | 14.3 | 18.8 | 16.9 | 1.2 | 5.6 |
| Mg (g/kg) | 2 | 11.7 | 5.7 | 2.3 | 42 |
| TP (g/kg) | 3.8 | 5.1 | 4.2 | 0.4 | 7.4 |
| Clay (%) | 4.4 | 13 | 7.9 | 1.9 | 25 |
| Silt (%) | 15.4 | 48 | 31 | 3.2 | 23 |
| Sand (%) | 40 | 80 | 61 | 0.05 | 15 |
| TN (g/kg) | 0.05 | 1.05 | 0.17 | 40 | 130 |
| MBC (mg/kg) | 13.7 | 3961 | 438 | 65 | 165 |
| MBN (mg/kg) | 2.8 | 210 | 57 | 12.5 | 91 |
| MQ (%) | 0.04 | 3.5 | 0.8 | 8.2 | 95 |
| SOC (g/kg) | 5.0 | 11.6 | 7.6 | 3.4 | 19 |
| pH | 7.5 | 8.48 | 7.97 | 0.6 | 3.1 |
| Nap (µg/kg) | 0.01 | 229 | 30.1 | 47 | 47 |
| Flu (µg/kg) | 0.01 | 103 | 17.4 | 20.7 | 20.7 |
| Phe (µg/kg) | 2.43 | 147 | 22.9 | 27 | 27 |
| Ant (µg/kg) | 0.31 | 103 | 12.8 | 21.1 | 21.1 |
| Fla (µg/kg) | 2.9 | 216 | 26.7 | 39.6 | 39.6 |
| Pyr (µg/kg) | 2.6 | 289 | 28.5 | 50.3 | 50.3 |
| BaA (µg/kg) | 0.01 | 227 | 20.8 | 45.5 | 45.5 |
| Chr (µg/kg) | 0.01 | 346 | 31.6 | 60.6 | 60.6 |
| BbF (µg/kg) | 0.01 | 253 | 15.9 | 38.8 | 38.8 |
| BkF (µg/kg) | 0.04 | 134 | 12.6 | 27.3 | 27.3 |
| BaP (µg/kg) | 0.04 | 220 | 21 | 38.8 | 38.8 |
| ∑11 PAH (µg/kg) | 58.67 | 1729 | 240 | 392 | 392 |
| 2 ~ 3 ring PAHs (µg/kg) | 23.44 | 308 | 83 | 68.1 | 68.1 |
| 4 ~ 5 ring PAHs (µg/kg) | 11.53 | 1421 | 157 | 256 | 256 |
TK: Total potassium, Mg: Magnesium, TP: Total phosphorus, TN: Total nitrogen, MBC: Microbial biomass carbon, MBN: Microbial biomass nitrogen, MQ: Microbial quotient, SOC: Soil organic carbon, Nap: Naphthalene, Flu: Fluorene, Phe: Phenanthrene, Ant: Anthracene, Fla: Fluoranthene, Pyr: Pyrene, BaA: Benzo[a]anthracene, Chr: Chrysene, BbF: Benzo[b]fluoranthene, BkF: Benzo[k]fluoranthene, BaP: Benzo[a]pyrene, ∑11 PAH: Sum of 11 polycyclic aromatic hydrocarbons.