Table 4 Enrichment factor and geo-accumulation index of Little Akaki River sediment

1.17

0.03

18.84

3.93

− 0.8

− 5.94

3.21

0.93

1.42

0.31

12.36

1.88

0.07

− 2.14

3.2

0.46

2.05

5.70

11.84

1.82

0.23

1.71

2.75

0.04

1.68

0.63

9.76

30.14

0.16

− 1.26

2.69

4.31

1.83

0.80

7.13

3.15

0.26

− 1.37

2.21

1.03

1.40

0.78

12.49

27.05

− 0.62

− 1.47

2.53

3.63

1.16

0.57

11.39

2.20

− 0.86

− 1.88

2.44

0.06

3.03

2.45

17.08

2.96

0.68

0.37

3.17

0.62

7.09

0.19

28.77

6.27

0.72

− 4.51

2.74

0.53

3.12

6.84

24.74

4.58

− 0.35

0.87

2.72

0.28

2.40

1.83

15.44

8.40

− 0.05

− 1.56

2.77

1.19