Table 1 The chemical composition of the soil sample within the tannery-contaminated site (triplicate) compared to a reference site (12 km away from the tannery site)

Li

9.040

0.002

7.470

0.001

Na

1.750 × 10³

0.002

4.687 × 10³

0.001

Mg

6.930 × 10³

0.001

3.882 × 10³

0.002

K

3.760 × 10³

0.002

3.090 × 10³

0.001

Ca

211.000 × 10³

0.001

126.200 × 10³

0.001

Cr

56.000

0.001

310.500

0.001

Mn

190.000

0.001

118.250

0.000

Fe

10.000 × 10³

0.001

5.837 × 10³

0.001

Co

35.700

0.001

4.075

0.009

Ni

18.400

0.001

9.728

0.002

Cu

9.590

0.002

6.950

0.001

Zn

25.700

0.002

38.525

0.001

Rb

13.200

0.001

10.108

0.001

Sr

165.000

0.001

328.250

0.001

Mo

0.433

0.002

0.244

0.008

Cd

0.098

0.013

0.134

0.007

Ba

141.000

0.001

120.075

0.001

Pb

6.960

0.001

5.500

0.001

U

1.050

0.001

1.002

0.001