Table 6 Principal component analysis of heavy metal concentration in groundwater in the research area.
Heavy metal elements | PC1 | PC2 | PC3 |
|---|---|---|---|
Cd | −0.947 | 0.077 | 0.348 |
Zn | 0.947 | 0.137 | −0.038 |
Ni | 0.928 | 0.310 | 0.016 |
Pb | 0.908 | 0.171 | −0.036 |
Co | 0.274 | 0.888 | 0.088 |
Cu | 0.324 | 0.816 | −0.047 |
Mn | 0.232 | 0.763 | 0.281 |
Al | −0.096 | 0.762 | −0.035 |
As | 0.136 | −0.342 | 0.329 |
Hg | 0.058 | 0.019 | 0.961 |
