Table 2 Heavy metal content.
Element | Hg | Cr | Ni | Cu | Zn | Cd | Pb | As |
|---|---|---|---|---|---|---|---|---|
Rhizosphere soil | ||||||||
 Min (mg/kg) | 0.01 | 25.6 | 12.6 | 6.14 | 31.4 | 0.04 | 25.4 | 2.26 |
 Max (mg/kg) | 0.06 | 90.5 | 49.8 | 32.6 | 141 | 0.14 | 99.0 | 10.9 |
 Mean value (mg/kg) | 0.03 | 51.2 | 23.2 | 18.9 | 56.5 | 0.08 | 35.8 | 5.57 |
 Standard deviation | 0.01 | 14.6 | 8.6 | 6.16 | 22.7 | 0.03 | 11.6 | 2.45 |
Grains | ||||||||
 Min (mg/kg) | 0.002 | 0.047 | 0.005 | 3.33 | 17.2 | 0.009 | 0.024 | 0.023 |
 Max (mg/kg) | 0.007 | 1.045 | 2.80 | 7.89 | 54.9 | 0.103 | 0.099 | 0.193 |
 Mean value (mg/kg) | 0.004 | 0.185 | 1.08 | 5.33 | 33.1 | 0.042 | 0.06 | 0.089 |
 Standard deviation | 0.001 | 0.166 | 0.729 | 1.13 | 9.04 | 0.021 | 0.017 | 0.047 |
Roots, stems, and leaves | ||||||||
 Min (mg/kg) | 0.002 | 4.78 | 0.581 | 1.78 | 4.37 | 0.018 | 0.127 | 0.087 |
 Max (mg/kg) | 4.89 | 26.8 | 9.49 | 6.37 | 53.5 | 0.364 | 1.01 | 0.398 |
 Mean value (mg/kg) | 0.202 | 12.0 | 2.21 | 2.89 | 13.7 | 0.109 | 0.371 | 0.176 |
 Standard deviation | 0.867 | 5.09 | 1.69 | 1.13 | 10.3 | 0.068 | 0.194 | 0.077 |
Atmospheric dry deposition | ||||||||
 Min (mg/kg) | 0.06 | 54.2 | 42.4 | 28.6 | 146 | 0.85 | 59.5 | 2.20 |
 Max (mg/kg) | 0.15 | 140 | 74.3 | 79.7 | 374 | 20.0 | 136 | 4.78 |
 Mean value (mg/kg) | 0.10 | 77.2 | 61.6 | 48.8 | 223 | 2.32 | 95.5 | 3.32 |
 Standard deviation | 24.6 | 25.2 | 14.5 | 31.4 | 29.6 | 204 | 20.3 | 20.1 |
Atmospheric wet deposition | ||||||||
 Min (μg/L) | 0.01 | ND | ND | 2.00 | 7.00 | ND | 1.00 | 0.03 |
 Max (μg/L) | 0.01 | 1.00 | 3.00 | 22.0 | 45.0 | 1.00 | 4.00 | 0.43 |
 Mean value (μg/L) | 0.01 | 0.40 | 1.26 | 10.2 | 22.5 | 0.06 | 2.26 | 0.19 |
 Standard deviation | 0 | 122 | 67.4 | 54.7 | 44.7 | 374 | 37.7 | 59.4 |
