Table 4.
Comparison of heavy metals in SPM of global rivers (unit in mg kg−1).
| Rivers | V | Cr | Mn | Ni | Cu | Zn | As | Cd | Pb |
|---|---|---|---|---|---|---|---|---|---|
| Zhujiang River (this study) | 143.6 | 129.1 | 982.4 | 39.9 | 44.1 | 186.8 | 116.8 | 3.8 | 38.1 |
| World River average | 129.0 | 130.0 | 1679.0 | 74.5 | 75.9 | 208.0 | 36.3 | 1.6 | 61.1 |
| South American River average | 131.0 | 79.0 | 700.0 | 46.0 | 59.0 | 184.0 | — | — | 76.0 |
| North American River average | 188.0 | 115.0 | 1430.0 | 50.0 | 34.0 | 137.0 | — | — | 22.0 |
| Asia (Russia) River average | 128.0 | 260.0 | 5767.0 | 123.0 | 145.0 | 300.0 | — | — | 35.0 |
| Asia (China) River average | 135.0 | 117.0 | 970.0 | 68.0 | 53.0 | 145.0 | — | — | 64.0 |
| Africa River average | 116.0 | 130.0 | 1478.0 | 78.0 | 53.0 | 130.0 | — | — | 46.0 |
| Europe River average | 85.0 | 164.0 | 1884.0 | 66.0 | 172.0 | 346.0 | — | — | 71.0 |
Note: The data for global rivers are from Viers et al. [11]; —, no data.