Table 6.
Varimax rotated component matrix for heavy metal(loid)s of SPM in the Zhujiang River.
| Variable | PC 1 | PC 2 | PC 3 | Communalities |
|---|---|---|---|---|
| V | 0.68 | 0.05 | −0.31 | 0.56 |
| Cr | 0.94 | −0.17 | −0.16 | 0.94 |
| Mn | 0.80 | −0.16 | 0.29 | 0.75 |
| Ni | 0.83 | −0.45 | 0.03 | 0.89 |
| Cu | 0.74 | −0.14 | −0.13 | 0.58 |
| Zn | −0.06 | 0.04 | 0.94 | 0.89 |
| As | −0.16 | 0.94 | −0.01 | 0.91 |
| Cd | −0.10 | 0.92 | 0.05 | 0.85 |
| Pb | 0.86 | −0.02 | 0.05 | 0.75 |
| Eigenvalues | 4.01 | 2.01 | 1.11 | |
| Variance (%) | 44.51 | 22.36 | 12.33 | |
| Cumulative (%) | 44.51 | 66.86 | 79.19 |
Note: Extraction method, principal component analysis; Rotation method, Varimax with Kaiser normalization; the “bold” values mean the factor loadings (the correlation coefficients between PC and initial variable) are “strong” or “moderate”.