L-5Problems on ppm to micrograms

conversion

Air Pollution and Control

(Elective-I)

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?

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.

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?

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?

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.

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)

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