Research Article
Using Spatial Regression to Model Potentially Toxic Metal (PTM) Mobility Based on Physicochemical Soil Properties
Table 2
Descriptive statistics for soil physical and chemical properties and metal concentrations.
| | Variables | Min | Max | Mean | Standard deviation | Skewness | Kurtosis |
| | Soil properties | | Moisture content (%) | 8.29 | 75.21 | 24.59 | 13.2 | 1.4 | 3.1 | | BD (g/cm3) | 0.79 | 1.79 | 1.25 | 0.2 | 0.2 | −0.07 | | pH | 3.60 | 7.60 | 4.89 | 0.8 | 1.3 | 2.2 | | CEC (meq/100 g) | 1.52 | 16.58 | 4.83 | 3.5 | 1.8 | 2.9 | | TOC (%) | 3.20 | 31.46 | 8.61 | 4.7 | 2.6 | 10.6 | | Sand (%) | 87.65 | 98.83 | 94.50 | 0.03 | −0.5 | −0.8 | | Silt (%) | 0.82 | 10.73 | 4.34 | 0.03 | 0.6 | −0.8 | | Clay (%) | 0.00 | 2.60 | 1.14 | 0.01 | 0.3 | −0.2 |
| | Metal concentration | | Zn (mg/kg) | 11.80 | 1354.16 | 302.52 | 402.7 | 1.7 | 1.6 | | Cu (mg/kg) | 1.14 | 64.67 | 13.96 | 13.2 | 2.3 | 5.9 | | Mn (mg/kg) | 6.29 | 2574.93 | 344.49 | 652.2 | 2.4 | 4.9 | | Pb (mg/kg) | 33.43 | 2271.43 | 326.69 | 529.6 | 2.7 | 6.4 | | Cd (mg/kg) | 7.14 | 40.00 | 11.86 | 5.1 | 3.6 | 17.8 |
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BD, bulk density; CEC, cation exchange capacity; TOC, total organic carbon.
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