Table 3 Summary of selected heavy metal(loid) concentrations in the agricultural soils around fifteen industrial complexes in Gyeongsangbuk-do, Korea
As (mg kg−1) | Cd (mg kg−1) | Cu (mg kg−1) | Ni (mg kg−1) | Pb (mg kg−1) | Zn (mg kg−1) | Hg (mg kg−1) | |
|---|---|---|---|---|---|---|---|
Topsoil | |||||||
Maximum | 57.08 | 2.95 | 48.49 | 25.19 | 197.89 | 128.32 | 0.17 |
Median | 3.57 | 0.06 | 12.68 | 7.96 | 3.99 | 37.73 | 0.03 |
Minimum | 0.17 | 0.00 | 0.00 | 1.23 | 0.00 | 19.53 | 0.01 |
Average | 4.80 | 0.14 | 14.82 | 8.24 | 7.70 | 41.10 | 0.03 |
Subsoil | |||||||
Maximum | 42.73 | 2.09 | 39.69 | 33.73 | 176.14 | 118.64 | 0.11 |
Median | 3.89 | 0.05 | 11.85 | 7.62 | 3.75 | 35.15 | 0.02 |
Minimum | 0.34 | 0.00 | 0.00 | 0.94 | 0.00 | 18.24 | 0.01 |
Average | 4.73 | 0.14 | 13.24 | 8.09 | 6.75 | 38.20 | 0.03 |
Korean guideline | 25 | 4 | 150 | 100 | 200 | 300 | 4 |
No. of samples > Korean guideline | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
Korean natural background | 6.83 | 0.29 | 15.26 | 17.68 | 18.43 | 54.27 | 0.06 |