Table 6.
The geo-accumulation index of dust heavy metals during winter in Beijing.
| Heavy Metal | Reference | Urban Dust | Surburban Dust | ||||
|---|---|---|---|---|---|---|---|
| Igeo | Rank | Pollution Level | Igeo | Rank | Pollution Level | ||
| Bi | 0.4 | 2.3 | 3 | Moderate pollution | 1.7 | 2 | Light pollution |
| Cd | 0.1 | 4.2 | 5 | Heavy pollution | 3.6 | 4 | High pollution |
| Co | 12.7 | −0.4 | 0 | No pollution | −0.3 | 0 | No pollution |
| Cr | 61 | 0.6 | 1 | Mild pollution | 0.6 | 1 | Mild pollution |
| Cu | 22.6 | 2.7 | 3 | Moderate pollution | 2 | 3 | Moderate pollution |
| Mo | 2 | 1.6 | 2 | Light pollution | 0.8 | 1 | Mild pollution |
| Ni | 26.9 | 0.5 | 1 | Mild pollution | 0.3 | 1 | Mild pollution |
| Pb | 26 | 1.7 | 2 | Light pollution | 1.2 | 2 | Light pollution |
| V | 75.5 | −0.5 | 0 | No pollution | −0.9 | 0 | No pollution |
| Zn | 74.2 | 2.6 | 3 | Moderate pollution | 2.2 | 3 | Moderate pollution |