|
| Cr | Mn | Co | Cu | Ni | Zn | As | Cd | Pb |
| Region means (this study) | 76.17 | 1698.28 | 19.94 |
| 59.49 | 438.41 | 56.80 | 4.39 | 109.78 |
| Background of sediments of the Pear River Estuarya | 81.1 | na | na |
| na | 100.7 | 22.9 | 0.2 | 44.0 |
| Standard for Marine Sediment Quality I classa | 80 | na | na | 35 | na | 150 | na | 0.50 | 60 |
| Standard for Marine Sediment Quality II classa | 150 | na | na | 100 | na | 350 | na | 1.50 | 130 |
| Standard for Marine Sediment Quality III classa | 280 | na | na | 200 | na | 600 | na | 5.00 | 250 |
| Average shaleC | 90 | na | 19 | na | 68 | 95 | 13 | 0.3 | 20 |