Table 2 Statistical summary of heavy metal distribution in acid extract and Ca(NO ₃ ) ₂ extract of the sediments

Acid extract

Cd

0.196

4.500

1.883

0.234

0.584

0.149

5.183

2.457

0.235

−0.084

<0.05

Cr

11.35

63.45

34.66

2.293

−0.262

23.82

68.97

37.65

1.543

1.790

Non-significant

Cu

25.15

49.39

36.84

1.285

−0.072

18.22

51.53

28.05

1.314

1.166

<0.05

Fe

3,835

5,186

4,630

57.83

−0.350

3,523

4,182

3,791

30.95

0.426

<0.05

Mn

236.2

836.7

447.5

32.97

0.713

167.7

886.0

321.4

26.00

2.234

<0.05

Pb

9.739

78.48

33.71

3.419

0.771

0.412

39.03

18.24

1.966

−0.003

<0.01

Zn

70.71

114.4

86.09

2.032

0.650

42.24

115.2

61.90

2.459

2.190

<0.05

Ca(NO₃)₂ extract

Cd

0.004

0.122

0.058

0.006

−0.081

0.016

0.146

0.071

0.006

0.175

Non-significant

Cr

0.042

0.546

0.217

0.027

0.794

0.008

0.478

0.230

0.023

0.061

Non-significant

Cu

0.008

0.220

0.098

0.008

0.212

0.012

0.134

0.073

0.006

−0.201

<0.05

Fe

0.020

28.50

2.069

0.985

4.415

0.248

1.218

0.658

0.053

0.314

<0.01

Mn

0.004

0.274

0.078

0.012

1.149

0.010

0.072

0.042

0.003

0.178

<0.01

Pb

0.206

2.032

1.192

0.085

−0.343

0.140

2.082

1.205

0.087

−0.254

Non-significant

Zn

0.010

0.656

0.179

0.023

1.972

0.056

0.186

0.118

0.007

0.175

<0.05