What is an example of a photochemical oxidant?
Examples of photochemical oxidants are: Ozone. Hydrogen peroxide. Peroxyacetyle nitrate.
What are photochemical oxidants and why are they harmful?
Photochemical oxidants are the product of chemical reactions that occur between nitrogen oxide (NO) and any of a host of different volatile organic compounds (VOCs). These photochemical oxidants are cause for concern, as they can have negative effects on human, plant and animal health.
What is photochemical smog and how is it formed?
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.
Which of the following group of gases cause photochemical smog?
Photochemical smog is caused by ozone, peroxyacetyl nitrate and nitrogen dioxide.
Is carbon monoxide a photochemical oxidant?
The photochemical oxidant standard was revised and restated as ozone in 1979. The current list of NAAQS is shown in Table 8.1 and includes carbon monoxide, nitrogen dioxide, ozone, lead, PM10, PM2.5, and sulfur dioxide [8].
Which is the major photochemical smog?
Ground-level ozone constitutes one of the major components of photochemical smog, so called because of the photochemical reaction of air pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) with ultraviolet light (sunlight); thus, the O3 levels vary strongly with season and the highest levels …
What are photochemical oxidants What Are there effects?
Photochemical oxidants are found in ‘photochemical smog’ which is a complex mixture of primary and secondary air pollutants. The ultimate protection of humans, animals, plants, and materials from photochemical oxidant injury requires reduction of the ambient concentration of the particular air pollutant.
What are the harmful effects of photochemical smog?
Harmful effects of photochemical smog:
- It corrode metals, stones, rubber and painted surface.
- It causes serious health problems to senior citizens, children and people with heart and lung problems which lead to emphysema, bronchitis, asthma.
What makes up photochemical smog?
Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. VOCs are released from gasoline, paints, and many cleaning solvents.
What is a photochemical smog What are the factors affecting the formation and severity of it?
Photochemical smog development factors 1-Nitrogen source and released organic combinations, combining high density of this material with industrializing and transportation are important factors forming photochemical smog. These factors cause some pollution to form in atmosphere by combustion fossil fuel.
Does co2 cause photochemical smog?
Carbon monoxide accelerates the reaction as measured by nitric oxide oxidation or ozone formation. This finding has relevance to photochemical smog formation.
Which one of the following automobile exhaust gas pollution is a major cause of photochemical smog?
NOX is one of the primary cause of photochemical smog. Smog is formed by the photochemical reaction of automobile exhaust and atmospheric air in presence of sunlight, NO2 decomposes into NO and monoatomic oxygen.