Research Article
Trace Metal Contamination Characteristics and Health Risks Assessment of Commelina africana L. and Psammitic Sandflats in the Niger Delta, Nigeria
Table 6
PCA factor loadings of the concentrations of trace metals for sandflat soil and C. africana L. samples.
| | | Factor components | | | 1 | 2 | 3 |
| Sandflat | Zn | −0.477 | 0.830 | 0.207 | Pb | 0.880 | −0.223 | 0.212 | Cd | 0.923 | −0.107 | 0.308 | Ni | 0.663 | 0.724 | 0.038 | Cr | −0.837 | −0.251 | 0.475 | Eigenvalue | 2.994 | 1.338 | 0.410 | Variability (%) | 59.879 | 26.755 | 8.207 | Cumulative % | 59.879 | 86.634 | 94.841 |
| C. africana L. | Zn | 0.833 | −0.470 | 0.037 | Pb | 0.849 | 0.516 | −0.021 | Cd | −0.690 | 0.304 | 0.637 | Ni | −0.724 | 0.430 | −0.500 | Cr | 0.791 | 0.600 | 0.083 | Eigenvalue | 3.042 | 1.124 | 0.664 | Variability (%) | 60.838 | 22.483 | 13.285 | Cumulative % | 60.838 | 83.321 | 96.606 |
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High factor loadings for each principle component are highlighted with bold type.
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