Table 6 Calculated potential ecological risk index and toxic response coefficient level.
Metals | Ecological risk index (Er) of each HM | Toxic response coefficient | Grades of ecological perils |
|---|---|---|---|
Cu | 38.38 | 5 | Low risk |
Co | 18.46 | 5 | Low risk |
Fe | 166.801 | 1 | Low risk |
Mn | 8.04 | 1 | Low risk |
Pb | 0.96 | 5 | Low risk |
Zn | 0.50 | 1 | Low risk |
