What is Smog - Civil Engineering

Sunday, 11 February 2018

What is Smog

What is Smog

Smog is a synchronously of two words smoke and fog, Smog can be of two types—Photo-chemical or coal-induced.
• Photo-chemical Smog is caused by the interaction of some hydrocarbons and oxidants mainly (nitrogen oxides) under the influence of sunlight rise to dangerous peroxyacetyl
 nitrate (PAN).
• Its main constituents are nitrogen oxides, PAN, hydrocarbons, carbon monoxide and ozone.
 • It reduces visibility, causes eye irritation, damage to vegetation and cracking of rubber.
• Modern smog (also called traffic smog) is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes that react in the atmosphere with sunlight to form secondary pollutants that also combine with the primary emissions to form photochemical smog.
• Coal induced smog consist of smoke, sulfur compound and fly ash.