Table 6 Total content of heavy metals in the soil in rice growing areas in Nanning /(mg/kg).
From: Assessment of environmental impacts of heavy metal pollution in rice in Nanning, China
The median | 25%value | 75%value | Risk screening value* | Risk screening value** | |
|---|---|---|---|---|---|
Total arsenic | 10.75 | 5.53 | 16.80 | 30 | 25 |
Lead | 26.05 | 17.70 | 38.48 | 100 | 140 |
Cadmium | 0.39 | 0.17 | 0.83 | 0.40 | 0.60 |
Total selenium | 0.43 | 0.31 | 0.59 | – | – |
Total barium | 55.0 | 32.50 | 81.25 | 250 | 300 |
Zinc | 96.0 | 50.75 | 145.25 | 200 | 250 |
PH value | 6.50 | 5.90 | 7.00 | – | – |
