Table 2.
Cadmium, lead and zinc content in soil samples from family allotment gardens in the selected study areas.
| Zone | Sampling points | Number of soil samples | Element [mg kg−1 dry weight] | Mean ± SD | Min | Max | Median | Excessive Rate (%) |
|---|---|---|---|---|---|---|---|---|
| I | 1 | 50 | Cd | 6.1 ± 3.0 | <LOQ | 12.9 | 6.2 | 84.0 |
| Pb | 423.5 ± 224.4 | 115.2 | 1009.1 | 409.4 | 68.0 | |||
| Zn | 1283.3 ± 733.3 | 318.4 | 3218.8 | 1202.6 | 90.0 | |||
| 2 | 40 | Cd | 13.6 ± 14.1 | 2.8 | 69.9 | 8.8 | 97.5 | |
| Pb | 649.4 ± 458.7 | 179.9 | 2777.6 | 508.9 | 97.5 | |||
| Zn | 1147.7 ± 1157.1 | 280.7 | 7443.0 | 870.7 | 92.5 | |||
| II | 1 | 7 | Cd | 11.2 ± 4.8 | 5.8 | 18.2 | 10.9 | 100.0 |
| Pb | 463.8 ± 352.5 | 152.3 | 1224.4 | 403.2 | 85.7 | |||
| Zn | 2254.7 ± 2046.0 | 705.4 | 6736.8 | 1888.0 | 100.0 | |||
| III | 1 | 27 | Cd | 9.1 ± 4.4 | 2.5 | 18.3 | 9.2 | 96.3 |
| Pb | 284.9 ± 152.4 | <LOQ | 659.0 | 258.8 | 51.9 | |||
| Zn | 1258.8 ± 816.4 | 375.8 | 4008.0 | 1039.1 | 92.6 | |||
| 2 | 49 | Cd | 14.8 ± 3.4 | 8.8 | 33.1 | 14.8 | 100.0 | |
| Pb | 1903.9 ± 314.2 | 1302.2 | 2823.9 | 1903.3 | 100.0 | |||
| Zn | 468.5 ± 91.6 | 325.4 | 772.2 | 470.2 | 36.7 | |||
| IV | 1 | 48 | Cd | 2.2 ± 1.2 | <LOQ | 5.3 | 1.8 | 20.8 |
| Pb | 100.2 ± 35.1 | 42.5 | 212.0 | 93.5 | 0.0 | |||
| Zn | — | — | — | — | — | |||
| MPC | Cd | 3 | ||||||
| Pb | 250 | |||||||
| Zn | 500 | |||||||