Table 8 Ecological risk factor and Potential Ecological Risk Index of heavy metals in the study area
Sample code | Zn | Ni | Cd | Cu | Pb | \(\sum E_{r}^{i}\) | Risk grade |
|---|---|---|---|---|---|---|---|
ODS-1 | 0.03 | – | 168 | – | 9.4 | 177.43 | Moderate |
ODS-2 | 0.02 | – | 180 | – | – | 180.02 | Moderate |
ODS-3 | 0.05 | – | 234 | – | – | 234.05 | Moderate |
ODS-4 | 0.03 | – | 186 | – | – | 186.03 | Moderate |
ODS-5 | 0.03 | – | 192 | – | 22.95 | 214.98 | Moderate |
ODS-6 | 0.04 | – | 147 | – | – | 147.04 | Light |
ODS-7 | 0.03 | – | 138.9 | – | – | 138.93 | Light |
ODS-8 | 0.02 | – | 147 | – | – | 147.02 | Light |
ODS-9 | 0.02 | – | 132 | – | – | 132.02 | Light |
ODS-10 | 0.02 | – | 86.1 | – | – | 86.12 | Light |
LFS-1 | 0.03 | – | 63.9 | – | – | 63.93 | Light |
LFS-2 | 0.03 | – | 99.9 | – | – | 99.93 | Light |
LFS-3 | 0.24 | – | 51 | 0.15 | – | 51.39 | Light |
LFS-4 | 0.26 | – | 110.1 | – | – | 110.36 | Light |
LFS-5 | 0.24 | – | 14.1 | – | – | 14.34 | Light |
Average value | 0.073 | – | 130 | 0.15 | 16.8 | 132.24 |  |
Potential ecological risk | Light | – | Very strong | Light | Light | Very strong |  |