River

Pb

Zn

Cu

As

Cd

Ni

Reference

Iyiudene

(range)

1.3 - 9.4

11.1 - 38.5

0.1 - 13.3

0.1 - 0.6

0.1 - 9.7

0.1 - 7.8

This Study

Mean

4.26

20.08

4.49

0.15

2.55

1.445

SD

2.25

7.35

3.62

0.17

3.07

2.24

Orle

2.0 - 162.3

5.0 - 57.0

2.3 - 24.3

0.5 - 4.8

<0.10 - 0.10

1.20 - 28.50

Adepoju and Adekoya (2014)

Imo

9.0 - 29.0

31.0 - 306.0

-

30.02 - 22.0

1.0 - 1.80

6.0 - 28.0

Ekwere et al. (2013)

Gulf of California

17

88

-

7

1

38

Brumsack (1986)

UCC

17

70

28

4.8

0.09

47

Rudnick and Gao (2003)

Average shale

20

95

50

10

1

68

Wedepohl (1971)

Surface horizons worldwide (K-P)

27

70

38.9

0.67

0.41

29

Kabata-Pendias (2010)

Uke stream

0.095

4.79

1.34

-

0.035

-

Opaluwa et al. (2012)

River Oyan

5 - 31

45 - 360

15 - 31

-

1 - 1.8

25 - 42

Oyebamiji et al. (2018)

Woji creek

11.58

52.15

12.4

6.9

0.06

10.17

Ibanga et al. (2019)

River Benin

1.10

6.38

1.75

-

-

0.75

Ogbeibu et al. (2014)

Ikorodu stream

9.73

95.21

9.99

0.99

0.18

3.30

Odukoya and Akande (2015)

Lagos Lagoon

0.12 - 0.18

14.23 - 21.21

14.88 - 20.8

1.27 - 2.62

2.95 - 6.69

12.68 - 19.76

Kafilat-Adebola et al. (2018)

Dakoto Sheha stream

0.4 - 7.8

7.0 - 110

0.8 - 38.3

0.3 - 39.5

0.5 - 3.8

1.2 - 41.4

Arhin et al. (2016)

Municipal Lake

317 - 496

34.6 - 872.1

0 - 385

-

1.14 - 18.3

12.04 - 63.49

Léopold et al. (2012)

Dakar coast

2.83 - 1308

7.14 - 88.5

12.9 - 121

-

0.18 - 1.63

1.16 - 27.6

Diop et al. (2015)

Koshi River

12.9 - 36.1

33.3 - 93.3

11.2 - 43.6

-

0.07 - 0.59

10.4 - 52.6

Li et al. (2020)

Liaohe River

10.57

50.24

17.82

9.88

1.20

17.73

Ke et al. (2017)

Unit-mg/kg