Table 1 Statistics of the heavy metal concentrations and Pb isotope ratios in the urban soils of Wuxi city (unit of heavy metal: mg kg−1; CV: coefficient of variation).
From: Study on the risk of soil heavy metal pollution in typical developed cities in eastern China
Element | Min | Max | Mean | Standard deviation | Variance | CV |
|---|---|---|---|---|---|---|
Be | 1.5 | 2.6 | 1.95 | 0.26 | 0.07 | 0.13 |
Cr | 64.5 | 99 | 72.9 | 6.8 | 45.8 | 0.09 |
Mn | 629 | 1210 | 851.8 | 139.4 | 19,431.5 | 0.16 |
Co | 12.2 | 17.9 | 14.2 | 1.2 | 1.4 | 0.08 |
Ni | 31.4 | 67.5 | 38.2 | 7.2 | 51.3 | 0.19 |
Cu | 19.8 | 37.2 | 25.5 | 3.3 | 11.0 | 0.13 |
Zn | 72.4 | 146 | 90.2 | 13.5 | 183.5 | 0.15 |
Cd | 0.34 | 1.06 | 0.51 | 0.17 | 0.03 | 0.33 |
Pb | 25.6 | 66.4 | 37.6 | 9.0 | 80.9 | 0.24 |
208Pb/206Pb | 2.09 | 2.12 | 2.10 | 0.0068 | 0.00005 | 0.003 |
206Pb/207Pb | 1.17 | 1.18 | 1.177 | 0.0046 | 0.00002 | 0.004 |
