what is one of the major components of photochemical smog?
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Photochemical smog is a mixture of air pollutants which have been chemically altered into further noxious compounds by exposure to sunlight. The main components of photochemical smog are nitrogen oxides, Volatile Organic Compounds (VOCs), tropospheric ozone, and PAN (peroxyacytyl nitrate).
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VOCs play a significant role in the formation of ozone and fine particulates in the atmosphere. Under sunlight, VOCs react with nitrogen oxides emitted mainly from vehicles, power plants and industrial activities to form ozone, which in turn helps the formation of fine particulates.
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Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.
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Though there are many different chemicals in air pollution, this lesson will focus on the six most common types: lead, nitrogen oxide, ozone, particulate matter, carbon dioxide, and sulfur dioxides. These can be in the form of solids, liquids, or gases.
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What is photochemical smog? Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities.
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Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog.
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Smog is a heterogeneous mixture of various particles and pollutants suspended in the air. The dirty particles that make up the smog can be removed from the air and breathed into the lungs, making smog quite a problematic heterogeneous mixture.
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Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight. Primary pollutants.
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The two major primary pollutants, nitrogen oxides and VOCs, combine to change in sunlight in a series of chemical reactions, outlined below, to create what are known as secondary pollutants. The secondary pollutant that causes the most concern is the ozone that forms at ground level.
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Criteria Pollutants - Air Pollutants of Concern - NH Department of Environmental Services. A colorless gas that is the major constituent of photochemical smog. ... Sources of VOCs and NOX include vehicles, factories, landfills, industrial solvents, and miscellaneous small sources such as gas stations, lawn equipment, etc.
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Secondary pollutants are pollutants which form in the atmosphere. These pollutants are not emitted directly from a source (like vehicles or power plants). ... Photochemical smog is made up of various secondary pollutants like ozone, peroxyacyl nitrates (PANs), and nitric acid (seen in Figure 2).
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['Particulate matter (PM10 and PM2. ... ', 'Ozone (O3)', 'Nitrogen dioxide (NO2)', 'Carbon monoxide (CO)', 'Sulphur dioxide (SO2)']
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['Particulate matter (PM). One type of particulate matter is the soot seen in vehicle exhaust. ... ', 'Volatile Organic Compounds (VOCs). ... ', 'Nitrogen oxides (NOx). ... ', 'Carbon monoxide (CO). ... ', 'Sulfur dioxide (SO2). ... ', 'Greenhouse gases.']
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Photochemical smog, often referred to as "summer smog", is the chemical reaction of sunlight, nitrogen oxides and volatile organic compounds in the atmosphere, which leaves airborne particles and ground-level ozone. Photochemical smog depends on primary pollutants as well as the formation of secondary pollutants.
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Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.
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The major undesirable components of photochemical smog are nitrogen dioxide (NO2), ozone (O3), PAN (peroxyacetylnitrate), and chemical compounds that contain the –CHO group (aldehydes).
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Fossil fuels consisting mainly of carbon, hydrogen, nitrogen, sulfur, and oxygen produce the following products during combustion: The primary pollutants are Carbon Monoxide (CO), Carbon Dioxide (CO2), Sulfur (SO2), Nitrogen Dioxide (NOx), Nitric Oxide (N2O), Volatile organic compounds (VOCs), and Hydrocarbons (HCs).