air pollution control l 5
DESCRIPTION
AIR POLLUTION CONTROL course material by Prof S S JAHAGIRDAR,NKOCET,SOLAPUR for BE (CIVIL ) students of Solapur university. Content will be also useful for SHIVAJI and PUNE university studentsTRANSCRIPT
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L-5Problems on ppm to micrograms
conversion
Air Pollution and Control
(Elective-I)
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If SO2, CO and NO2 are found out to be
1000 ppm, 600 ppm and 200 ppm
respectively in a air quality survey. What are
concentrations in µg/m3?
If concentrations of SO2, CO and NO2 are
given as 1200 ppm, 4000 ppm and 500 ppm
respectively. What are their concentrations
in µg/m3?
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The concentration of CO reaches in room to a level
of 400 ppm. Express this value in µg/m3.
The average daily concentration off SO2 is
observed to be 415 µg/m3 at 250 C and 1
atmospheric pressure. Find out concentration of
SO2 in ppm.
The ozone concentration at 00 C and 1 atmospheric
pressure found out to be 118 µg/m3.Find
concentration of ozone in ppb.
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Calculate concentrations of following air
pollutants in µg/m3.Assume STP conditions
i) SO2 – 1100 ppm
ii)CO – 1500 ppm
iii)NO2 – 800 ppm
The exhaust gas from an automobile contains
1.5% by volume of CO. What is concentration of
CO in mg/m3 at 250 C and 1 atmospheric pressure?
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The exhaust gas from an automobile contains 1.0% by
volume of CO. What is concentration of CO in mg/m3
at 250 C and 1 atmospheric pressure?
The ozone concentration is observed to be 80 µg/m3 at
an urban monitoring station. Does the value exceed
the standard clean air?
The NO and CO content of sample of air at 220 C and
1 atmospheric pressure is 20 and 100 ppm
respectively. Calculate their concentration in µg/m3?
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Convert the following into ppm at 300 C
i) Ozone – 25 µg/m3
ii)H2S – 15 µg/m3
Convert ozone concentration of 0.2 ppm to
µg/m3if temperature is 300 C.
250 µg/m3 of ozone is present in the
atmosphere at 25 0 C. What is the
concentration of ozone in ppm and ppb.
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H2S concentration in the atmosphere is
25 ppm at 25 0 C. What is equivalent
concentration in mg/m3?
Do as directed
i)CO – 100 µg/m3 (convert to ppb)
ii)NO – 10 ppm (convert to mg/m3)
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The CPCB standards for NO2, SO2 and CO (micrograms/cu. m) for sensitive , industrial and residential area are given in table. Express their concentration in ppm at 1 atmpressure and 25oC
Parameter Sensitive area
Industrial area
Residential area
SO2 30 120 80
NO2 30 120 80
CO 0.75 1.5 1.0