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AIR & AIR POLLUTIONSUDARSAN
INTRODUCTION•Air is essential for maintenance of life.
The immediate environment of man comprises of air on which depends all forms of life
Definition•Air is mixture of gases that forms
environment
Composition of air•Mechanical mixture of gases - Nitrogen = 78.1% - Oxygen = 20.93% -CO2 = 0.03%
FUNCTIONS OF AIR Interchange of gases Thermo regulation Medium for communication Medium for spread of pollens & bacteria Helps functioning of auditory & olfactory
organs
AIR OF OCCUPIED ROOM Chemical changes Physical changes
DISCOMFORT ZONE•It is subjective sensation which the people
experience in ill ventilated and crowded rooms
COMFORT ZONE•The range of effective temperature over
which majority of individuals feel comfortable
CORRECTED EFFECTIVE TEMPERATURE (DEG C)PLESANT & COOL 20
COMFORTABLE AND COOL 20-25
COMFORTABLE 25-27
HOT & UNCOMFORTABLE 27-28
EXTREMELY HOT 28+
INTOLERABLY HOT 30+
PREDICTED FOUR HOUR SWEAT RATE (p4 sr)
Comfort zone 1-3 litres
Just tolerable 3-4.5 litres
intolerable 4.5+
AIR POLLUTIONDEFINITION: It is the condition when there
is excessive concentration of foreign matter in the outdoor atmosphere which is harmful to man or his environment
CAUSES OF AIR POLLUTION
Industrial sources Domestic sources Scientific research Transportation Other sources…
AIR POLLUTANTS More than 100 are identified CO Sulphurdioxide Lead Carbondioxide Hydrocarbons Cadmium Ozone Hydrogen sulphide
INDICATORS OF AIR POLLUTION
Smoke index % of sulphurdioxide in air Air pollution index Grit & dust measurement
MONITORING OF AIR POLLUTIONIN INDIA :- - National air quality control programme
EFFECT OF AIR POLLUTION- HEALTH ASPECT : -Temporary effect -permanent effect
-Social & economical effect
METHODS OF CONTROL & PREVENTION Containment Dilution Replacement Primary control Legal control International action
DISINFECTION OF AIR-PHYSICAL METHHOD Control on dust Mechanical methods Use of UV rays
-CHEMICAL METHODS Chemical vapours Deodrants Burning of chemicals
THANK U
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