Table 1 Assessment metrics and classification levels for potential ecological Risk.
From: Innovative isotopic modeling and risk assessment of PTEs and PAHs in urban soils
Er | Status of ecological risk for a single metal | RI | Grade of potential ecological risk to the environment |
|---|---|---|---|
40 < Er | Low | 150 < RI | Low risk |
80 < Er ≤ 40 | Moderate | 300 < RI ≤ 150 | Moderate risk |
160 < Er ≤ 80 | Considerable | 600 < RI ≤ 300 | Considerable risk |
320 < Er ≤ 160 | High | 600 ≥ RI | High risk |
320 ≥ Er | Very high |
