Pb | Cd | Hg | Cu | Zn | ||
Testing ground (n = 10) | Mean ± SD | 320 ± 76 | 0.68 ± 0.14 | 1.57 ± 0.70 | 102 ± 25 | 316 ± 47 |
(min-max) | (229 - 436) | (0.55 - 0.99) | (0.97 - 3.3) | (81 - 156) | (231 - 367) | |
IDF Regional Thresholds [27] | 53.7 | 0.51 | 0.32 | 28 | 88 | |
Soil threshold values receiving sludge (decree n˚ 97-1133) | 100 | 2 | 1 | 100 | 300 | |
Chinese regulatory values [28] | 80 | 0.3 - 0.6 | 0.3 - 1 | 50 - 200 | 200 - 300 | |
Dutch regulatory values [28] | 530 | 13 | 36 | 190 | 720 | |
German regulatory values [28] | 1000 | 5 | 5 | 200 | 600 |