Research Article
Using Spatial Regression to Model Potentially Toxic Metal (PTM) Mobility Based on Physicochemical Soil Properties
Table 3
Spearman’s rho correlation coefficients for soil properties and PTM concentrations (
). Significant correlations are marked with
or
.
| Variables | Moisture content (%) | BD (g/cm3) | pH | CEC (meq/100 g) | Sand (%) | Silt (%) | Zn (mg/kg) | Mn (mg/kg) | Cu (mg/kg) | Pb (mg/kg) |
| Soil properties | BD | 0.309 | 1 | | | | | | | | | pH | 0.364 | — | 1 | | | | | | | | CEC | — | — | — | 1 | | | | | | | TOC | 0.278 | −0.571 | — | 0.341 | | | | | | | Sand | 0.457 | 0.375 | 0.488 | 0.409 | 1 | | | | | | Silt | −0.459 | −0.362 | −0.531 | −0.450 | −0.979 | 1 | | | | | Clay | — | — | — | — | −0.640 | 0.515 | | | | |
| Metal concentrations | Zn | — | — | 0.445 | — | — | — | 1 | | | | Mn | — | — | 0.400 | — | 0.343 | −0.388 | 0.430 | 1 | | | Cu | 0.319 | — | 0.543 | — | 0.556 | −0.593 | 0.435 | 0.521 | 1 | | Pb | — | — | 0.546 | — | 0.442 | −0.471 | 0.415 | 0.337 | 0.750 | 1 | Cd | 0.296 | — | 0.523 | — | 0.318 | −0.379 | 0.379 | — | 0.557 | 0.504 |
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