Scholars' Showcase 2025

Photochemical smog is a type of air pollution characterized by the presence of ozone and nitrogen dioxide. Photochemical smog can cause several respiratory issues in humans, animals and plants due to the presence of ozone causing irritation of airways. Ozone and nitrogen oxide present in the atmosphere are a result of a series of chemical reactions between volatile organic compounds (VOCs). The photochemical smog formation is triggered by an initial reaction between hydroxyl radical and a volatile organic compound. A common VOC that produces photochemical smog is isoprene. Isoprene has a significant role in the formation of ground-level ozone through its reaction with hydroxyl radicals. Isoprene is released into the atmosphere from artificial sources (rubber refining waste) and natural sources (Big trees). This study seeks to understand the chemical mechanisms of photochemical smog formation in order to develop strategies to regulate adverse effects of photochemical smog in urban environments.