Table 1 Descriptive data of heavy metals in paddy soils from Jin-Qu basin of Zhejiang province (n = 109).
Cd (mg kg−1) | Pb (mg kg−1) | Ni (mg kg−1) | Cr (mg kg−1) | Zn (mg kg−1) | Cu (mg kg−1) | SOM (%) | pH | |
|---|---|---|---|---|---|---|---|---|
Data | ||||||||
Max | 1.68 | 108.5 | 100.4 | 175.3 | 251.5 | 77.3 | 6.15 | 7.38 |
Min | 0.06 | 5.0 | 0.3 | 2.8 | 11.9 | 1.0 | 1.59 | 4.48 |
Median | 0.32 | 29.3 | 11.6 | 19.8 | 93.9 | 14.3 | 3.23 | 5.17 |
Statistics | ||||||||
Mean | 0.37 | 32.1 | 15.2 | 24.2 | 98.7 | 16.7 | 3.36 | 5.22 |
SD | 0.249 | 11.9 | 15.2 | 22.6 | 54.4 | 11.1 | 0.96 | 0.64 |
CV | 68% | 37% | 100% | 93% | 55% | 67% | 29% | 12% |
K-S (p) | 0.009 | 0.010 | 0.000 | 0.001 | 0.353 | 0.045 | 0.623 | 0.001 |
References | ||||||||
Backgrounda | 0.17 | 25.6 | 22.3 | 54.6 | 69.0 | 17.8 | – | – |
Guidelinesb | 0.30 | 80 | 60 | 250 | 200 | 50 | – | – |
Exceeding | 42.2% | 0.9% | 2.8% | 0 | 3.7% | 1.8% | – | – |
Mean values of different counties | ||||||||
Dongyang (n = 38) | 0.18 | 24.9 | 11.0 | 19.1 | 68.8 | 9.5 | 3.66 | 5.25 |
Jiangshan (n = 33) | 0.44 | 31.5 | 28.9 | 43.9 | 127.5 | 29.0 | 4.14 | 5.38 |
Longyou (n = 38) | 0.55 | 42.1 | 17.3 | 24.2 | 113.1 | 21.9 | 2.61 | 5.23 |
