CHARACTERISTICS OF AIR
POLLUTANTS
Sulphur dioxide (SO2): It is one of the
most important air pollutant and exists
where ever fossil fuels are burnt. Thermal
plants produce the largest quantity of
SO2
Carbon Monoxide (CO): The automobile
exhausts are the main contributors CO. The
(CO) causes asphyxia i.e., loss of
consciousness as a result of too little
oxygen and too much carbon dioxide in the
human blood.
Hydrocarbons and Photochemical
oxidations: Hydrocarbons are mainly
released into the atmosphere by
automobile exhausts.
Lead: It is mainly injected into the
atmosphere from the automobile exhausts,
particularly by the automobiles running on
petrol. They cause irritation of mucous
membranes of nose, throat and lungs.
Oxides of Nitrogen: These are the second
most abundant pollutants of air in many
cities ranking next to SO2
. The oxides of nitrogen are produced from air oxidation, electrical discharge and solar radiations, incineration plants, welding operation
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