Environmental Engineering Reference
In-Depth Information
TABLE 2.11
Atmospheric Gases
To Convert from
to
Multiply by
Milligram per cubic meter
(mg/m
3
)
Micrograms per cubic meter (µm/m
3
)
1000.0
Micrograms per liter (µg/L)
1.0
ppm by volume (20°C)
24.04/molecular weight of gas
ppm by weight
0.8347
Pounds per cubic foot (lb/ft
3
)
62.43 × 10
-9
Micrograms per cubic foot
(µm/ft
3
)
Milligrams per cubic foot (mg/ft
3
)
0.001
Micrograms per liter (µg/L)
0.001
ppm by volume (20° C)
0.02404/molecular weight of gas
ppm by weight
834.7 × 10
-6
Pounds per cubic foot (lb/ft
3
)
62.43 × 10
-12
Micrograms/liter (µm/L)
Milligrams per cubic meter (mg/m
3
)
1.0
Micrograms per cubic meter (µg/m
3
)
1000.0
ppm by volume (20°C)
24.04/molecular weight of gas
ppm by weight
0.8347
Pounds per cubic ft (lb/ft
3
)
62.43 × 10
-9
ppm by volume (20°C)
Milligrams per cubic meter (mg/m
3
)
Molecular weight of gas/24.04
Micrograms per cubic meter (µg/m
3
)
Molecular weight of gas/0.02404
Micrograms per liter (µg/L)
Molecular weight of gas/24.04
ppm by weight
Molecular weight of gas/28.8
Pounds per cubic ft (lb/ft
3
)
Molecular weight of gas/385.1 × 10
6
ppm by weight
Milligrams per cubic meter (mg/m
3
)
1.198
Micrograms per cubic meter (µg/m
3
)
1.198 × 10
3
Micrograms per liter (µg/L)
1.198
ppm by volume (20°C)
28.8/molecular weight of gas
Pounds per cubic ft (lb/ft
3
)
7.48 × 10
-6
Pounds per cubic foot (lb/ft
3
)
Milligrams per cubic meter (mg/m
3
)
16.018 × 10
6
Micrograms per cubic meter (µg/m
3
)
16.018 × 10
9
Micrograms per liter (µg/L)
16.018 × 10
6
ppm by volume (20°)
385.1 × 10
6
/molecular weight of gas
ppm by weight
133.7 × 10
3
•
ppm C
3
H
8
× 1.8 = mg/m
3
C
3
H
8
(propane)
•
ppm F
-
× 790 = µg/m
3
F
-
(luor ide)
•
ppm H
2
S × 1400 = µg/m
3
H
2
S (hydrogen sulfide)
•
ppm HCHO × 1230 = µg/m
3
HCHO (formaldehyde)
s
oil
t
est
r
esults
C
onversion
f
aCtors
Note:
Because biosolids are often land-applied to agricultural fields or are land-
filled, wastewater biosolids managers must be familiar with the USEPA's 503 rules
for land application of biosolids.
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