Table 3. Pearson’s correlation coefficient between heavy metal elements and matrix of PCA loadings.

Correlation analysis						Principal component analysis
	As	Pb	Cd	Cr	Cu	PC 1	PC 2
As	1					0.432	-0.637
Pb	0.912*	1				0.465	-0.106
Cd	0.640	0.828	1			0.421	0.718
Cr	0.904*	0.917*	0.820	1		0.455	-0.160
Cu	0.840	0.967*	0.911*	0.890	1	0.463	0.205
Eigenvalues						4.459	0.387
% of Variance						89.18	7.75
Cumulative %						89.18	96.93

* Significant at p ≤ 0.05