Sample sites | Soil layers | Heavy metals (mg∙kg−1) | HPI | ||||
Cr | Cd | Pb | As | Hg | |||
Xiwang | T | 27.92 ± 0.56 | 1.08 ± 0.29 | 29.38 ± 2.61 | 9.78 ± 0.18 | 1.44 ± 0.05 | 6.60 |
S | 21.08 ± 0.95 | 0.83 ± 0.36 | 26.67 ± 0.19 | 8.90 ± 0.51 | 1.26 ± 0.03 | 5.55 | |
Wenchang | T | 34.21 ± 0.52 | 1.17 ± 0.14 | 17.08 ± 1.72 | 10.24 ± 0.91 | 0.48 ± 0.02 | 5.07 |
S | 31.38 ± 2.10 | 0.91 ± 0.40 | 13.58 ± 3.22 | 9.37 ± 0.50 | 0.45 ± 0.01 | 4.39 | |
Fanyao | T | 32.13 ± 1.63 | 1.13 ± 0.33 | 23.63 ± 1.44 | 16.52 ± 0.72 | 0.44 ± 0.02 | 5.74 |
S | 28.17 ± 1.86 | 0.63 ± 0.45 | 20.29 ± 4.84 | 15.07 ± 0.43 | 0.40 ± 0.02 | 4.65 | |
Sanyuan | T | 42.17 ± 0.52 | 2.13 ± 0.63 | 20.42 ± 3.21 | 13.48 ± 0.41 | 1.41 ± 0.79 | 8.10 |
S | 31.50 ± 1.02 | 1.42 ± 0.44 | 18.33 ± 1.87 | 12.34 ± 0.36 | 1.10 ± 0.06 | 6.45 | |
Dongzhang | T | 26.38 ± 0.78 | 0.83 ± 0.40 | 21.58 ± 2.80 | 11.98 ± 0.62 | 0.53 ± 0.01 | 4.96 |
S | 20.21 ± 1.92 | 0.71 ± 0.36 | 18.71 ± 2.42 | 9.91 ± 1.07 | 0.51 ± 0.01 | 4.23 | |
Nanzhuang | T | 30.42 ± 1.99 | 2.08 ± 0.51 | 22.04 ± 6.47 | 15.92 ± 0.90 | 0.34 ± 0.02 | 5.96 |
S | 22.21 ± 1.23 | 0.83 ± 0.07 | 20.37 ± 2.28 | 13.88 ± 1.21 | 0.28 ± 0.02 | 4.29 | |
Dongbai | T | 36.29 ± 2.37 | 3.17 ± 0.26 | 19.38 ± 2.55 | 12.79 ± 0.84 | 0.67 ± 0.04 | 7.18 |
S | 29.13 ± 0.45 | 2.88 ± 0.13 | 19.04 ± 2.60 | 11.12 ± 0.43 | 0.61 ± 0.02 | 6.41 | |
Limit (pH > 7.5) | 250 | 0.40 | 50 | 20 | 0.35 |
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