Table 5.
The potential ecological risk indices of Cu, Zn, Cd and Pb in each region.
| Region | Elements | Ci s | Ci n | Ci f | Ti r | Ei r | Total |
|---|---|---|---|---|---|---|---|
| ZE | Cu | 21.39 | 22.20 | 0.96 | 5 | 4.82 | 56.49 |
| Zn | 86.13 | 80.30 | 1.07 | 1 | 1.07 | ||
| Cd | 0.21 | 0.14 | 1.55 | 30 | 46.37 | ||
| Pb | 17.67 | 20.90 | 0.85 | 5 | 4.23 | ||
| MQ | Cu | 22.56 | 22.20 | 1.02 | 5 | 5.08 | 58.87 |
| Zn | 96.87 | 80.30 | 1.21 | 1 | 1.21 | ||
| Cd | 0.22 | 0.14 | 1.59 | 30 | 47.62 | ||
| Pb | 20.77 | 20.90 | 0.99 | 5 | 4.97 | ||
| NMS | Cu | 28.70 | 21.90 | 1.31 | 5 | 6.55 | 104.45 |
| Zn | 105.13 | 74.00 | 1.42 | 1 | 1.42 | ||
| Cd | 0.25 | 0.08 | 3.07 | 30 | 92.02 | ||
| Pb | 25.95 | 29.10 | 0.89 | 5 | 4.46 | ||
| NL | Cu | 23.35 | 21.90 | 1.07 | 5 | 5.33 | 134.92 |
| Zn | 116.50 | 74.00 | 1.57 | 1 | 1.57 | ||
| Cd | 0.33 | 0.08 | 4.01 | 30 | 120.43 | ||
| Pb | 44.12 | 29.10 | 1.52 | 5 | 7.58 |