Research Article
Soil Heavy Metal Distribution with Depth around a Closed Landfill and Their Uptake by Datura stramonium
Table 2
Correlation coefficient between soil properties and heavy metals at different depths.
| | Soil depth = 0–30 cm | Sand | Silt | Clay | pH | CEC | EC | OM | Fe | Ni | Zn | Cd | Cr | Cu |
| Fe | −0.46 | 0.34 | 0.58 | −0.02 | 0.75 | 0.05 | −0.55 | 1 | | | | | | Ni | −0.13 | 0.11 | 0.19 | 0.07 | 0.26 | −0.29 | 0.32 | 0.16 | 1 | | | | | Zn | −0.40 | 0.48 | 0.18 | 0.01 | 0.21 | −0.58 | −0.03 | 0.29 | 0.39 | 1 | | | | Cd | −0.23 | 0.17 | 0.29 | −0.03 | 0.17 | 0.12 | −0.68 | 0.36 | −0.44 | 0.28 | 1 | | | Cr | −0.02 | −0.03 | 0.19 | 0.28 | 0.52 | 0.52 | −0.73 | 0.58 | 0.10 | 0.01 | 0.57 | 1 | | Cu | −0.09 | 0.13 | 0.04 | 0.34 | 0.37 | 0.49 | −0.65 | 0.36 | −0.45 | −0.22 | 0.66 | 0.71 | 1 |
| | Soil depth = 30–60 cm | Fe | −0.10 | 0.22 | 0.33 | −0.53 | 0.44 | −0.20 | −0.58 | 1 | | | | | | Ni | −0.15 | 0.53 | 0.53 | −0.14 | 0.50 | −0.29 | −0.18 | 0.43 | 1 | | | | | Zn | 0.47 | −0.04 | −0.36 | 0.35 | −0.10 | 0.67 | 0.26 | −0.73 | −0.24 | 1 | | | | Cd | −0.24 | 0.62 | 0.04 | −0.63 | 0.64 | 0.20 | −0.56 | 0.36 | 0.55 | −0.04 | 1 | | | Cr | 0.54 | −0.67 | −0.38 | 0.53 | −0.55 | 0.18 | 0.18 | −0.30 | −0.69 | 0.15 | −0.74 | 1 | | Cu | 0.28 | 0.27 | −0.20 | 0.02 | 0.34 | 0.63 | −0.17 | −0.29 | −0.02 | 0.74 | 0.21 | −0.18 | 1 |
| | Soil depth = 60–90 cm | Fe | 0.12 | 0.13 | 0.02 | 0.15 | 0.28 | 0.18 | −0.37 | 1 | | | | | | Ni | −0.16 | 0.42 | 0.58 | −0.38 | 0.46 | −0.23 | 0.02 | −0.20 | 1 | | | | | Zn | −0.11 | 0.31 | 0.48 | −0.37 | 0.35 | −0.22 | 0.10 | −0.32 | 0.96 | 1 | | | | Cd | −0.12 | 0.09 | 0.35 | −0.35 | 0.33 | −0.35 | −0.42 | 0.58 | −0.07 | −0.08 | 1 | | | Cr | 0.75 | −0.80 | −0.63 | −0.00 | −0.66 | 0.36 | −0.14 | 0.08 | −0.40 | −0.39 | −0.14 | 1 | | Cu | 0.10 | 0.01 | 0.06 | −0.13 | 0.30 | 0.06 | −0.73 | 0.64 | −0.24 | −0.30 | 0.81 | 0.08 | 1 |
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