Environmental Engineering Reference
In-Depth Information
Table 3.4 Average PM
2.5
values measured in a long-term study conducted in an open-pit mining
facility in a copper ore deposit in Rosemont (Virginia, USA) [
27
]
Pollutant
Period
Year 1
Year 5
Year 10
Year 15
Year 20
PM/TSP
lb/h
1,273.17
1,544.97
1,376.67
1,361.96
1,009.35
tpd
9.66
12.93
10.91
10.73
6.50
tpy
2,923.53
3,370.34
2,859.10
2,787.85
1,658.96
PM
10
lb/h
443.43
513.41
470.14
464.83
371.71
tpd
2.79
3.63
3.11
3.05
1.93
tpy
852.11
961.72
830.18
801.94
495.68
PM
2.5
lb/h
54.88
61.98
57.66
56.84
46.64
tpd
0.45
0.54
0.49
0.48
0.36
tpy
141.60
152.52
139.39
135.64
101.67
CO
lb/h
3,516.38
3,516.38
3,516.38
3,516.38
3,516.38
tpd
2.13
2.13
2.13
2.13
2.13
tpy
644.83
615.22
611.73
447.98
184.94
Table 3.5 PM
10
values measured in an open-pit mining facility for chromite extraction in Bangur
(Uttar Pradesh, India) [
28
]
Mine Office (A1)
g/m
3
Results in
μ
Sample No.
Date
RPM
SO
2
NO
x
1
03.04.11
85
4.0
11.2
<
2
07.04.11
58
4.0
14.3
3
11.04.11
57
<
4.0
19.5
4
15.04.11
65
<
4.0
22.3
5
18.04.11
65
4.0
20.8
6
21.04.11
75
7.6
22.6
7
25.04.11
73
4.3
27.8
8
30.04.11
78
5.1
21.0
Bangur village
(
A2
)
1
03.04.11
59
6.1
16.9
2
07.04.11
57
6.7
13.8
3
11.04.11
45
6.0
10.2
4
15.04.11
51
<
4.0
14.3
5
18.04.11
61
<
4.0
14.1
6
21.04.11
73
5.0
18.4
7
25.04.11
53
4.0
10.4
<
8
30.04.11
76
7.1
12.2
National ambient air quality standards
Annual
60
50
40
24 h
100
80
80
Asbestos is an iron and sodium hydroxy silicate with the following formula:
Na
2
Fe
2+
3
Fe
3+
2
Si
8
O
22
(OH)
2
. Its fibre size is compared with other sub-micrometre
particles in Fig.
3.7
[
32
].
