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CH3041
AIR POLLUTION
• The urban atmosphere has 2
major classes of pollutants
which are formed principally
by combustion processes :
major classes of pollutants
which are formed principally
by combustion processes :
1) Primary pollutants : emitted
directly
from the source into the
atmosphere. eg. smoke
from the source into the
atmosphere. eg. smoke
2)
Secondary pollutants : formed by rxn
of
primary pollutants in the atmosphere.
eg. Hydrocarbons + O2 + UV ® O3
primary pollutants in the atmosphere.
eg. Hydrocarbons + O2 + UV ® O3
The air pollution covered next
concerns local level
air pollution or SMOG.
concerns local level
air pollution or SMOG.
