重金属元素

SCBs (μg/L)

SFs (μg/L)

USFs (μg/L)

p-value (between groups)

Cd

3 ± 0.05

0.3 ± 0.001

0.1 ± 0.008

<0.001

Hg

3 ± 0.01

3 ± 0.02

2 ± 0.01

0.002

Pb

2.5 ± 0.009

1 ± 0.04

2 ± 0.01

<0.001

Ni

629 ± 5.15

615 ± 4.32

575 ± 4.55

<0.001

Fe

758 ± 6.10

742 ± 5.11

722 ± 5.14

0.001

Co

734 ± 6.22

729 ± 4.12

725 ± 5.11

0.179

Cu

36 ± 0.45

32 ± 0.6

34 ± 0.31

0.218

Cr

89 ± 0.21

87 ± 0.05

83 ± 0.40

0.325

Mn

126 ± 0.25

52 ± 0.04

53 ± 0.11

<0.001

Zn

79 ± 0.35

59 ± 0.04

53 ± 0.10

<0.001