Elements N = 20

mean

max

min

Worldwide data in soil*

Limit values for industrial use (Belgium)**

Fe%

10.6

22.4

4.5

-

-

Mn

750

1300

100

418

-

Cr

92

293

37

42

800

Cu%

14.5

43.6

1.2

14

800

Cd

24

246

4

1.1

30

As

850

4600

100

4.7

300

Se

21

251

ND

0.7

-

Zn

2455

13,300

200

62

3000

Pb

2185

28,000

200

25

2500

Pt

84

110

29

-

-