Sampling sites

Cu

Zn

Pb

Cd

Ni

Fe

1

34.79 ± 0.19

60.83 ± 1.74

27.78 ± 1.41

1.25 ± 0.04

13.11 ± 0.16

1.98 ± 0.00

2

65.39 ± 0.70

442.19 ± 4.13

29.97 ± 0.36

1.24 ± 0.08

29.25 ± 0.08

2.78 ± 0.04

3

35.48 ± 0.64

256.50 ± 2.40

34.22 ± 0.23

1.37 ± 0.06

26.42 ± 0.24

2.14 ± 0.01

4

12.79 ± 0.57

75.38 ± 1.63

8.46 ± 0.83

0.60 ± 0.05

10.09 ± 0.54

1.89 ± 0.00

5

37.64 ± 0.95

241.87 ± 0.78

53.73 ± 0.18

1.65 ± 0.11

21.18 ± 0.48

3.31 ± 0.09

6

13.90 ± 0.03

117.38 ± 0.99

28.28 ± 0.11

1.40 ± 0.14

11.89 ± 0.29

3.67 ± 0.02