Formation of Photochemical Smog
When NOx and VOCs are released into the environment from a variety of sources, photochemical smog starts to develop. Ozone and peroxyacetyl nitrate (PAN), two secondary pollutants, are created when sunlight interacts with these pollutants and sets off a sequence of chemical reactions.
Formation of Ozone (O3)
Sunlight converts NO2 into oxygen atoms and nitric oxide (NO). The ozone development cycle is a sequence of chemical processes that results from these oxygen atoms reacting with oxygen molecules (O2) to generate ozone (O3).
Production of Peroxyacetyl Nitrate (PAN)
- Peroxyacyl radicals are created when VOCs and NOx combine in the presence of sunlight.
- Peroxyacetyl nitrate (PAN), a strong respiratory irritant and part of photochemical smog, can be created by these radicals interacting with other substances.
In general, photochemical smog’s distinctive haze and health risks are caused by sunlight’s interaction with NOx and VOCs, which also forms ozone and other secondary pollutants.
What is Photochemical Smog?
Photochemical Smog is related to the pollution of air and emerges when sunlight interacts with contaminants, mostly from industrial and vehicular emissions. Photochemical smog contains pollutants such as nitrogen oxides, volatile organic compounds (VOCs), and sunlight. They can cause respiratory issues and eye discomfort. Its appearance in the atmosphere is hazy and brownish-grey. In this article, we will study the composition, formation, causes and effects of the photochemical Smog in detail.
Table of Content
- What is Photochemical Smog?
- Photochemical Smog Components
- Formation of Photochemical Smog
- Causes of Photochemical Smog
- Photochemical Smog Effects
- Conclusion – What is Photochemical Smog?
- FAQs on What is Photochemical Smog?
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