Table 2 Concentration of heavy metals (mg kg−1) in the sediment of the Xiangjiang River and of other rivers in South China
| Â | Cr | Co | Ni | Cu | Zn | As | Cd | Pb | Refs. |
|---|---|---|---|---|---|---|---|---|---|
Xiangjiang River | |||||||||
Zhuzhou Reach (n = 30) Minimum | 23.11 | 5.26 | 16.58 | 20.54 | 58.24 | 34.74 | 2.1 | 38.19 | This study |
Zhuzhou Reach Maximum | 94.84 | 25.24 | 53.58 | 159.3 | 629.60 | 186.80 | 62.59 | 246.20 | |
Zhuzhou Reach Average | 59.71 | 16.97 | 36.29 | 71.29 | 257.17 | 98.38 | 23.31 | 102.52 | |
Yongzhou Reach (n = 8) | 129.25 | 30.88 | 107.38 | 51.58 | 71.85 | 51.90 | 6.825 | 93.80 | [28] |
Hengyang Reach (n = 8) | 54.59 | – | – | 112.1 | 659.7 | 135.2 | 21.66 | 359.4 | [40] |
Changsha Reach (n = 12) | 95.10 | 19.45 | 48.70 | 73.13 | 465.7 | – | 13.63 | 140.10 | [28] |
Jinjiang River (n = 8) | 7.63 | 1.88 | 2.80 | 7.24 | 48.09 | 40.96 | 0.07 | 32.79 | [41] |
Hanjiang River (n = 6) | 16.24 | 3.39 | 12.94 | 9.28 | 62.47 | 59.48 | 0.10 | 26.97 | [41] |
Yangtze River (n = 34) | 82.87 | – | 32.85 | 25.14 | 82.92 | 9.31 | 0.17 | 25.13 | [42] |
Dongting Lake (background) | 44 | 10.3 | 21.2 | 20 | 83.3 | 15 | 0.33 | 23.3 | [36] |