3. Introduction
Constant & menacing problem throughout
the world.
Threatens the very existence of man on
planet.
Deserves a sustained attention at national
& international level.
4. Sources of air pollution
1) Industrial sources- factories of iron, steel,
cement, paper, thermal power plant,
petroleum refineries etc
HCl, CO, CO2, O3, H2S, SO2
2) Automobile sources- lead, polycyclic
hydrocarbons, carbon monoxide. Diesel
engines.
5. Sources of air pollution
3) ) Domestic sources - burning of fire wood,
dung, crop residues, kerosene oil, smoking.
Smoke, dust, SO2
4) Agricultural sources- organo-phosphorous &
organo-chlorous compounds.
5) Natural sources- forest fires, volcanic
eruptions, dust storms.
15. Acid rain
Sulphur dioxide- sulphuric acid
Carbon dioxide- carbonic acid
Nitrogen dioxide-nitric acid
Leads to acidification of soil, water
Damage to plants, fish
Decreased food production
19. Sources of indoor air pollution
Respirable particles- tobacco smoke
Carbon monoxide- gas heaters, stove
Nitrogen dioxide- gas cooker
Sulphur dioxide- coal combustion
Carbon dioxide- combustion, respiration
20. Effects of indoor Air Pollution
ARI in children
Chronic lung diseases, cancer in adults
Adverse pregnancy outcomes
21. Monitoring of Air Pollution
Sulphur dioxide
Smoke
Suspended particles
22. Monitoring of Air Pollution
SO2 monitoring- Daily basis – by lead
peroxide device
Smoke/ soiling index- white filter paper
Dust measurement – by using midget
impinger - Monthly analyzed
Coefficient of haze- for smoke assessment
Air pollution index – one or more
pollutants as a measure of severity of
pollution
23. Prevention and Control
Location of industries
Containment
Replacement
Dilution- green belts
Legislation
International action
24. Disinfection of air
1. Mechanical ventilation – reduces
vitiated air, bacterial density
2. U-V radiation – OT & infectitious
disease wards
3. Chemical mists – triethylene glucol
4. Dust control – oil