Table 15 Comparison of trace elements concentration with other regions

Coastal Kerala

0.00006–0.171

0.00007–0.00027

0.0052–0.0334

0.03–0.57

0.12–4.2

0.09–3.39

0.0034–0.0357

0.0047–0.096

0.09–2.93

5.05–248.62

Present study

China

8–23

–

41–173

–

–

54–1040

–

27–74

–

2.10–2.95

Mei et al. (2011)

Iraq

–

0.87–2.35

10.35–30.52

36.45–120.11

136.05–312.11

14.96–130.25

39.98–103.98

8.02–32.69

–

928.7–3441.05

Salah et al. (2012)

Madurai

–

1.24–4.32

10.4–18.16

13.6–34.50

–

22.24–45.6

11.52–14.80

20.42–42.37

–

–

Sarala and Vidya (2013)

Malaysia

3.6–65.9

0.09–1.1

1.5–66.2

1.7–126.0

–

12.4–430

1.8–56.0

8.2–39.0

–

5160–43,200

Elias et al. (2018)

Jordan

–

7.51–17.22

7.51–50.21

23.85–124.23

–

113.30–325.22

225.57–1711.84

18.51–79.99

–

–

Odat (2013)

Jharkhand

–

0.2–0.7

21.6–93.2

17–67

353–993

78–188

27.4–98.3

17.1–38.4

–

23,947–50,691

Pandey et al. (2016)

Ghaziabad

–

0.11–1.1

4.05–67.6

3.6–111.7

41.6–677.5

20.6–282

12.8–165

5.6–69.6

–

10,865–24,873

Chabukdhara et al. (2016)

Iran

2.89–5.02

9.67–16.65

–

–

–

40–87.50

47–124.75

17.36–32.13

–

3.74–5.24

Vaezi et al. (2015)