Elements

(ppm)

Sample sites S1 to S5

Enrichment Factor (EF)

average ± SD

Contamination Factor (CF)

average ± SD

Geo-accumulation Index (I_geo)

average ± SD

Si

1.281 ± 0.101

1.101 ± 0.001

−0.134 ± 0.001

Al

0.971 ± 0.082

0.835 ± 0.014

−0.255 ± 0.007

Mg

1.186 ± 0.108

1.019 ± 0.032

−0.168 ± 0.013

Mn

1.256 ± 0.077

1.083 ± 0.079

−0.142 ± 0.032

Cu

1.342 ± 0.173

1.163 ± 0.194

−0.116 ± 0.075

Ni

1.128 ± 0.241

0.984 ± 0.273

−0.197 ± 0.111

Pb

0.698 ± 0.152

0.601 ± 0.127

−0.406 ± 0.096

Ti

1.015 ± 0.175

0.868 ± 0.110

−0.240 ± 0.057

Zn

0.465 ± 0.043

0.402 ± 0.050

−0.575 ± 0.055

K

0.550 ± 0.070

0.475 ± 0.069

−0.503 ± 0.067

Ca

0.483 ± 0.051

0.415 ± 0.019

−0.559 ± 0.020

Co

0.843 ± 0.079

0.726 ± 0.059

−0.316 ± 0.035

Cr

1.084 ± 0.106

0.931 ± 0.036

−0.207 ± 0.016