F1

F2

F3

F4

F5

F6

Pb (mg/kg)

0.925

−0.258

−0.267

0.042

−0.047

−0.050

Cd(mg/kg)

0.954

−0.108

−0.168

0.215

0.058

0.032

Cr(mg/kg)

0.318

0.892

−0.318

−0.028

−0.026

0.001

Zn (mg/kg)

0.962

0.059

0.137

−0.146

0.176

−0.007

Cu (mg/kg)

0.945

−0.245

−0.055

−0.168

−0.124

0.030

Ni (mg/kg)

0.754

0.309

0.569

0.086

−0.074

−0.009

Eigenvalue

4.253

1.033

0.546

0.106

0.058

0.004

Variability (%)

70.891

17.211

9.093

1.764

0.966

0.075

Cumulative %

70.891

88.102

97.195

98.959

99.925

100.000