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Table 12 The potential ecological risk index values (RI) of detected trace elements in surface sediments of the selected study sites

From: Eco-toxic risk assessment and source distribution of trace metals in surface sediments of the coastal and in four rivers estuary of Sarawak

Sample site code

    

Ei

   

RI

 

Zn

As

Mn

Ni

Cr

Cu

Co

Cd

 

CZ1(1)

0.60

2.30

0.12

1.35

0.48

1.25

1.35

0.90

8.05

CZ1(2)

1.07

2.90

0.14

0.85

0.76

1.20

1.05

0.90

8.87

CZ2(1)

1.10

2.30

0.12

1.20

0.76

1.10

1.15

2.10

9.83

CZ2(2)

1.13

4.20

0.12

1.45

0.74

1.10

1.25

3.00

12.99

CZ3(1)

1.41

3.20

0.13

1.50

0.78

1.10

1.55

0.90

10.57

CZ3(2)

1.44

3.80

0.14

1.75

0.82

1.10

1.60

–

10.65

CZ4(1)

1.47

4.20

0.17

1.85

0.84

1.20

1.60

2.10

13.43

CZ4(2)

1.52

4.80

0.18

1.60

0.90

1.35

1.85

2.10

14.30

CZ5

1.55

5.10

0.18

1.90

0.94

1.40

1.85

–

12.92

CZ6

1.56

4.60

0.22

1.90

0.92

1.50

2.00

0.90

13.60

CZ7(1)

1.58

5.30

0.22

1.90

1.00

1.65

2.10

3.00

16.75

CZ7(2)

1.62

4.60

0.23

2.00

0.94

1.65

1.65

–

12.69

CZ8

1.59

3.70

0.19

1.50

1.06

1.65

1.80

3.00

14.49

CZ9(1)

1.63

3.90

0.18

1.25

0.86

1.65

1.30

3.90

14.67

CZ9(2)

1.58

3.90

0.19

0.80

0.80

1.20

1.30

–

9.77

CZ10

1.61

4.30

0.19

0.85

0.74

1.20

1.30

–

10.19

Mean

1.40

3.30

0.17

0.85

0.84

1.35

1.55

1.50

10.96

  1. Details of sample site codes are mentioned in the materials and methods section