Table 6 Geo-accumulation index (Igeo) of the sediment in the study area.

From: Heavy metal concentrations and pollution indicators in the Ennore ecosystem, east coast of Tamilnadu, India using atomic absorption spectrometry study with statistical approach

S. no.

Sample ID

Mg

K

Ca

Ti

Fe

V

Cr

Mn

Co

Ni

Zn

Cu

As

Cd

Ba

La

Pb

1

S1

− 3

− 3.13

− 0.52

0.63

− 1.2

0.44

− 0.25

− 0.78

− 1.14

− 1.57

− 1.07

− 5.32

− 1.53

3.32

− 2.25

− 2.2

− 0.75

2

S2

− 2.21

− 3.01

− 0.68

1.44

− 0.79

0.68

0.11

− 0.55

− 0.8

− 1.62

− 1.03

− 4.23

− 1.21

2.08

− 2.58

− 1.49

− 0.29

3

S3

− 4.74

− 3.74

− 1.72

− 1.55

− 2.47

− 0.98

− 1.07

− 2.36

− 2.25

− 2.95

− 2.26

− 5.71

− 2.22

0

− 1.82

− 3.01

− 1.9

4

S4

− 3.9

− 2.94

− 1.28

− 0.8

− 2.34

− 1.32

− 0.84

− 2.27

− 2.94

− 1.89

− 2.2

0

− 2.39

0

− 1.94

0

0

5

S5

− 4.8

− 2.36

− 1.21

− 3.24

− 3.09

− 2.37

− 1.69

− 3

− 1.65

− 1.93

− 2.6

− 4.78

− 2.36

0

− 1.45

0

− 1.61

6

S6

− 3.61

− 2.02

− 1.65

− 2.9

− 3.36

− 3.08

− 2.2

− 3.2

− 4.34

− 2.37

− 1.87

− 4.85

− 1.71

2.08

− 1.03

0

− 2.71

7

S7

− 3.54

− 2.5

− 1.98

− 2.04

− 2.96

− 2.25

− 1.01

− 2.94

− 2.15

− 2.2

− 2.45

− 5.09

− 1.98

0

− 1.48

− 5.13

− 1.99

8

S8

− 2.75

− 3.3

− 0.95

− 0.87

− 1.99

− 1.01

− 0.4

− 3.27

− 1.93

− 1.86

− 1.84

0

− 2.12

0

− 1.58

− 2.86

− 2.31

9

S9

− 2.32

− 2.75

− 1.73

0.34

− 1.5

− 0.02

0.13

− 3.56

− 1.97

− 1.7

− 1.63

− 4.67

− 1.48

0

− 1.89

− 3.94

− 1.84

10

B1

− 4.65

− 2.39

− 1.78

− 1.69

− 2.89

− 1.34

− 1.71

− 2.74

− 1.95

− 2.43

− 2.37

− 6.01

− 1.98

0

− 1.54

0

− 3.13

11

B2

− 4.74

− 2.66

− 2.06

− 1.53

− 3.07

− 2

− 2.2

− 2.85

− 2.58

− 2.99

− 2.76

− 4.77

− 2.41

0

− 1.46

0

− 3.96

12

B4

− 3.53

− 3.15

− 2.06

2.84

− 0.33

1.83

0.55

− 0.05

− 0.51

− 1.9

− 0.7

− 5.95

− 0.98

2.73

− 2.19

0.64

0.03

13

B5

− 4.51

− 2.54

− 3.13

− 2.18

− 4.28

− 3.12

− 2.25

− 4.14

− 2.48

− 2.41

− 3.69

0

− 1.97

2.8

− 1.05

0

− 3.98

14

B6

− 3.2

− 2.44

− 2.28

− 2.63

− 3.23

− 2.89

− 2.26

− 3.32

− 3.31

− 3.15

− 2.89

0

− 2.37

4.64

− 1.38

0

− 4.45

15

B7

− 3.51

− 2.97

− 0.9

0.96

− 1.67

0.03

− 0.07

− 0.68

− 0.62

− 1.4

− 1.17

− 5.05

− 2.47

3.28

− 2.05

− 1.49

− 0.74

16

B8

− 4.66

− 3.16

− 0.72

0.75

− 1.08

0.14

− 0.25

− 0.71

− 0.75

− 1.45

− 1.21

− 5.15

− 1.53

1.29

− 2.42

− 2.11

− 0.46

17

B9

− 3.69

− 3.2

− 0.75

1.43

− 0.82

0.76

0.1

− 0.5

− 0.72

− 1.71

− 1.03

− 4.23

− 1.05

1.47

− 2.15

− 1.46

− 0.96

18

C1

− 6.24

− 2.49

− 2.85

− 3.68

− 4.3

− 3.12

− 3.56

− 4.21

− 3.75

− 2.84

− 3.57

0

− 1.97

2.44

− 1.11

0

0

19

C2

− 4.27

− 2.36

− 2.16

− 2.52

− 3.68

− 3

− 2.6

− 3.51

− 3.31

− 2.82

− 2.97

− 5

− 2.37

4.36

− 1.66

0

− 3.64

20

C4

− 1.91

− 2.96

− 0.66

1.12

− 0.97

0.2

0.47

− 0.77

− 1.31

− 1.69

− 1.22

− 5.93

− 2.11

3.19

− 1.99

− 1.62

− 0.66

21

C5

− 2.93

− 3.1

− 0.66

0.8

− 1.06

0.12

− 0.28

− 0.78

− 1.38

− 1.57

− 1.14

− 5.09

− 3.47

1.79

− 2.61

− 2.25

− 1.04

22

C9

− 2.18

− 3.07

− 0.62

1.46

− 0.81

0.67

0.2

− 0.55

− 1.09

− 1.71

− 1.2

− 4.23

− 1.6

2.5

− 2.39

− 1.32

− 0.41

23

C10

− 4.68

− 2.69

− 1.47

− 1.13

− 2.47

− 1.65

− 1.33

− 2.4

− 2.02

− 2.07

− 2.26

− 5.07

− 2.22

3.44

− 1.77

− 2.67

− 1.79

24

C11

− 3.82

− 2.81

− 1.52

− 0.91

− 2.45

− 0.99

− 1.4

− 2.28

− 2.34

− 2.18

− 2.35

− 4.42

− 2.39

2.96

− 1.89

− 4.13

− 2.35

25

C12

− 4.81

− 2.32

− 1.6

− 2.91

− 3.09

− 2.66

− 1.66

− 3.11

− 3.77

− 2.04

− 2.73

0

− 1.75

2.3

− 1.49

0

− 2.17

26

C13

− 3.64

− 2.14

− 1.47

− 3.12

− 3.38

− 2.85

− 2.2

− 3.38

− 3.07

− 2.17

− 1.87

− 5.35

− 1.55

1.87

− 1.11

− 5.76

− 2.07

Average

− 3.76

− 2.78

− 1.48

− 0.84

− 2.28

− 1.15

− 1.06

− 2.23

− 2.08

− 2.10

− 2.00

− 3.88

− 1.97

1.87

− 1.78

− 1.57

− 1.74

Minimum

− 6.24

− 3.74

− 3.13

− 3.68

− 4.3

− 3.12

− 3.56

− 4.21

− 4.34

− 3.15

− 3.69

− 6.01

− 3.47

0

− 2.61

− 5.76

− 4.45

Maximum

− 1.91

− 2.02

− 0.52

2.84

− 0.33

1.83

0.55

− 0.05

− 0.51

− 1.4

− 0.7

0

− 0.98

4.64

− 1.03

0.64

0.03