Table 3.
Heavy metal concentrations in the soils from the 7 sampling sites
| Sample numbers | Total metal concentration | Concentration of soluble forms of metals | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 mol dm−3 HC1 | 1 mol dm−3 NH4NO3 | ||||||||
| Cd | Pb | Zn | Cd | Pb | Zn | Cd | Pb | Zn | |
| mg kg−1 d.m. | |||||||||
| 1 | 7.15 | 173.7 | 697.5 | 7.65 | 166.2 | 402.9 | 0.41 | 4.52 | 34.52 |
| 2 | 51.91 | 3614 | 6844 | 51.60 | 3575.7 | 6264 | 6.16 | 11.16 | 179.98 |
| 3 | 3.52 | 111.4 | 341.9 | 3.46 | 104.9 | 179.3 | 0.17 | 4.68 | 2.68 |
| 4 | 45.SI | 1283 | 4215 | 45.01 | 1008.5 | 3696 | 4.57 | 2.04 | 335.80 |
| 5 | 5.24 | 187.1 | 496.7 | 3.86 | 148.8 | 225.3 | 1.21 | 6.65 | 102.43 |
| 6 | 6.69 | 266.5 | 358.3 | 5.73 | 263.6 | 180.6 | 3.02 | 26.59 | 174.54 |
| 7 | 0.29 | 7.90 | 28.4 | 0.08 | 0.8 | 3.7 | 0.03 | 0.35 | 1.98 |
| Mean | 17.2 | 806.2 | 1854 | 18.29 | 752.64 | 1564 | 2.22 | 8.00 | 118.8 |
| SD | 21.8 | 1310 | 2630 | 23.41 | 1288 | 2450 | 2.41 | 8.89 | 121.4 |