Table 1 The Trace Element Concentrations in Coal Gangue and Its Combustion Products

From: The Environmental Geochemistry of Trace Elements and Naturally Radionuclides in a Coal Gangue Brick-Making Plant

 

Coal gangue (mg/kg)

Background value (mg/kg)

Fly ash (mg/kg)

Brick (mg/kg)

Flue gas (ug/m3)

Particulates in flue gas (ug/m3)

As

27.3 ± 0.9

30.0 ± 3.0

32.4 ± 1.0

18.1 ± 1.0

19.3 ± 0.66

23.6 ± 1.45

Cd

0.42 ± 0.06

5.00 ± 0.60

0.47 ± 0.07

0.29 ± 0.04

0.77 ± 0.11

0.37 ± 0.13

Cr

48.6 ± 3.2

96.0 ± 3.0

62.0 ± 1.4

40.8 ± 3.3

6.01 ± 0.39

8.44 ± 1.56

Co

5.90 ± 0.29

19.0 ± 1.0

2.92 ± 0.14

6.32 ± 0.25

0.77 ± 0.04

3.32 ± 0.68

Cu

25.7 ± 1.0

70.0 ± 3.0

26.5 ± 1.0

20.1 ± 0.76

38.3 ± 1.4

16.7 ± 4.5

Hg

0.15 ± 0.03

0.27 ± 0.03

0.29 ± 0.05

0.03 ± 0.01

0.39 ± 0.07

0.33 ± 0.08

Ni

21.8 ± 3.2

70.0 ± 2.0

7.8 ± 1.14

25.3 ± 2.2

11.7 ± 1.7

9.52 ± 2.73

Pb

5.72 ± 1.27

21.0 ± 1.0

7.04 ± 1.57

5.31 ± 1.19

8.13 ± 1.81

4.23 ± 1.27

Se

3.42 ± 0.22

8.70 ± 1.40

4.31 ± 0.16

2.20 ± 0.14

6.56 ± 0.43

0.84 ± 0.26

Sn

2.62 ± 0.16

3.90 ± 0.30

3.43 ± 0.09

1.31 ± 0.08

5.42 ± 0.33

2.65 ± 0.82

V

52.4 ± 2.7

205 ± 15

12.2 ± 0.6

56.6 ± 2.2

4.08 ± 0.22

1.24 ± 0.47

Zn

40.1 ± 2.3

130 ± 10

48.8 ± 2.2

34.2 ± 1.9

27.9 ± 1.6

32.8 ± 5.6

  1. The background values of trace elements in coal gangue are from ref. 31.
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