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pH and heavy metal concentrations in soils at the experimental sites
| Site | pH | As (mg kg-1) |
Cd (mg kg-1) |
Cu (mg kg-1) |
Zn (mg kg-1) |
Pb (mg kg-1) |
|---|---|---|---|---|---|---|
| Youxian (2014) | 4.88 | 22.5 | 0.55 | 28.6 | 137.4 | 42.3 |
| Youxian (2015) | 5.19 | 17.4 | 0.46 | 29.9 | 100.7 | 35.4 |
| Fuyang | 5.64 | 12.2 | 0.39 | 28.3 | 120.6 | 36.4 |
| Xiantan | 4.87 | 19.4 | 1.40 | 27.4 | 125.3 | 39.9 |
| Standards* | 30 | 0.3 | 50 | 200 | 250 |
*National Environmental Protection Bureau Environmental quality standard for soils GB 15618, 1995
