Table 4 Principal component analysis (PCA) of heavy metals in Dongping lake sediments.
Elements | PC1 | PC2 | PC3 |
|---|---|---|---|
As | 0.88 | 0.04 | 0.19 |
Zn | 0.08 | 0.95 | −0.08 |
Cu | 0.85 | 0.42 | −0.13 |
Ni | 0.41 | 0.83 | 0.12 |
Cd | 0.23 | 0.22 | 0.88 |
Hg | 0.87 | 0.28 | 0.22 |
Pb | 0.67 | 0.71 | 0.09 |
Cr | 0.00 | 0.17 | −0.94 |
Eigenvalue | 4.37 | 1.77 | 1.00 |
Variance percentage (%) | 54.62 | 22.14 | 12.46 |
Cumulative contribution rate (%) | 54.62 | 76.76 | 89.22 |
