Table 8.

Total variance explained and component matrices for the heavy metals.

Component loadings	Initial eigenvalues			Extraction sums of squared loadings			Rotation sums of squared loadings
	Total	% of Variance	Cumulative %	Total	% of variance	Cumulative %	Total	% of variance	Cumulative %
1	1.816	30.269	30.269	1.816	30.269	30.269	1.721	28.683	28.683
2	1.444	24.065	54.334	1.444	24.065	54.334	1.450	24.166	52.850
3	1.133	18.875	73.209	1.133	18.875	73.209	1.222	20.359	73.209
4	0.761	12.675	85.884
5	0.573	9.548	95.433
6	0.274	4.567	100.000

Elements	Rotated component matrix
	PC1	PC2	PC3
As	− 0.022	0.288	− 0.73
Cr	0.092	0.779	− 0.265
Cu	0.910	− 0.015	0.119
Ni	− 0.067	0.820	0.229
Pb	0.926	0.039	0.031
Zn	0.146	0.291	0.739