This smog can cause a lot of adverse effects on humans and other living organisms. Photochemical smog is a unique type of air pollution which is caused by reactions between sunlight and pollutants like hydrocarbons and nitrogen dioxide. Photochemical smog refers to a type of smog which is formed when the ultraviolet light from the sun reacts with nitrogen oxides present in the atmosphere. The name of the common components of photochemical smog are • Nitrogen oxide • Volatile organic compounds (VOCs) • Tropospheric ozone • PAN ( peroxy acetyl mitrate) these are common components of photochemical smog which is a mixture of many kind air pollutants which have been mainly chemically altered into further noxious compounds by exposure to sunlight. Smog contains soot particulates like smoke, sulphur dioxide, nitrogen dioxide and other components.
Formation of Photochemical Smog. Although photochemical smog is often invisible, it can be extremely harmful, leading to irritations of the respiratory tract and eyes. Step 1: People begin driving in the morning, nitrogen is burned or oxidized \[N_2 + O_2 \rightarrow 2NO\] Oxidation number of N 2 is 0. The severity of smog is most often judged by the ground level concentration of ozone. The term smog (not to be confused with photochemical smog) is commonly used to represent a near-ground haze made of a combination of smoke and fog rather than ozone, nitric acid, and organic compounds.
Photochemical smog is now a rather common, regional-scale phenomenon in many parts of the world. There are several specific components. Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere.It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities. Originally, the word was coined to describe the hazy mixture of smoke and fog in 1950’s London, according to the EPA.
When it is exposed to ultraviolet radiation, the NO 2 molecule is known to undergo a complex series of hydrocarbon reactions to produce the photochemical smog components. They can be divided into primary and secondary pollutants. The principal man-made sources of photochemical smog are emissions from motor vehicles and photochemical reactions of oxides of nitrogen and reactive hydrocarbons.
Nitric oxide combines with water vapour in the atmosphere to form nitric acid, which is one of the components of acid rain. This type of smog usually manifests as a brown haze and is most commonly seen in highly populated cities that are placed in relatively warm climates. One of the primary components of photochemical smog is ozone. While ozone can be produced naturally in an unpolluted environment, the interaction with VOCs prevents nitrogen oxide -- after being transformed to nitrogen dioxide -- from consuming ozone. The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone, and PAN (peroxyacytyl nitrate). Photochemical smog is a mixture of air pollutants which have been chemically altered into further noxious compounds by exposure to sunlight.
Photochemical smog, also known as summer smog, is a type of smog that is produced when UV light originating from the sun interacts with the oxides of nitrogen present in the atmosphere. Primary and secondary pollutants A primary … Smog is definitely a top concern when it comes to poor outdoor air quality. Smog Smog = smoke + fog (smoky fog) caused by the burning of large amounts of coal, vehicular emission and industrial fumes (Primary pollutants).
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