Table 3.
The level and terminology of PI and Ei of the analyzed heavy metals in urban and non-urban soils.
| Parameter | Urban soil | Non-urban soil | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Zn | Cu | Cd | Pb | Ni | Zn | Cu | Cd | Pb | Ni | |
| Pollution index (PI) | ||||||||||
| Min | 1.04 | 1.02 | 1.08 | 1.1.05 | 1.02 | 1.03 | 1.01 | 1.03 | 1.02 | 1.01 |
| Max | 3.5 | 5.4 | 3.42 | 3.4 | 4.21 | 1.59 | 1.97 | 2.02 | 1.41 | 1.39 |
| Mean | 1.51 | 1.73 | 1.96 | 1.89 | 1.86 | 1.4 | 1.33 | 1.5 | 1.31 | 1.29 |
| SD | 0.4 | 0.81 | 0.71 | 0.62 | 1.1 | 0.22 | 0.45 | 0.33 | 0.31 | 0.42 |
| %Class of total samples | ||||||||||
| LP | 89.8 | 81.1 | 76.8 | 56.5 | 65.2 | 100 | 100 | 92 | 100 | 100 |
| MP | 7.3 | 14.5 | 7.3 | 39.1 | 11.6 | 8 | ||||
| HP | 2.9 | 4.4 | 15.9 | 4.4 | 23.2 | |||||
| Single risk factor (Ei) | ||||||||||
| Min | 1.04 | 5.11 | 32.5 | 5.23 | 5.12 | 1.03 | 4.93 | 31.2 | 4.1 | 4.3 |
| Max | 3.5 | 27.12 | 102.67 | 16.99 | 21.06 | 1.59 | 9.87 | 61.3 | 5.6 | 9.3 |
| Mean | 1.51 | 8.65 | 58.73 | 9.46 | 10 | 1.4 | 6.65 | 39.2 | 5.4 | 5.8 |
| SD | 0.4 | 4.1 | 21.2 | 3.1 | 4.9 | 0.22 | 3.2 | 12.7 | 2.4 | 2.5 |
| %Class of total samples | ||||||||||
| LR | 100 | 100 | 36.7 | 100 | 100 | 100 | 90 | 100 | 100 | |
| MR | 46.8 | 10 | ||||||||
| CR | 16.5 | |||||||||
PI; LP low pollution (1 < PI ≤ 2), MP moderate pollution (2 < PI ≤ 3), HP high pollution (PI > 3).
Ei; LR low risk (Ei ≤ 40), MR moderate risk (40 < Ei ≤ 80), CR considerable risk (80 < Ei ≤ 160).