What three primary pollutants are involved with photochemical smog?
Among the pollutants involved in photochemical smogs are ozone, nitrogen dioxide and peroxyacyl nitrate (PAN). The nitrogen dioxide, and other oxides of nitrogen, are primary pollutants produced by dissociation in combustion reactions, and both 'prompt' and 'thermal' NOx can be involved in the reactions.
Which is a secondary pollutant involved in the formation of photochemical smog?
Photochemical smog is made up of various secondary pollutants like ozone, peroxyacyl nitrates (PANs), and nitric acid (seen in Figure 2).
Which of the following is an air pollutant associated with photochemical smog?
Thus photochemical smog is mainly composed of oxides of nitrogen, volatile organic compounds (primary pollutants), Carbon monoxide, and peroxyacetyl nitrate (PAN) (secondary pollutants). Carbon monoxide accelerates the reaction as measured by nitric oxide oxidation or ozone formation.
When primary pollutants react with other primary pollutants?
When two or more primary pollutants react in the atmosphere and cause additional atmospheric pollution, the result is called secondary pollution. Nitrogen oxides , for instance, can react with volatile organic compounds to from smog , a secondary pollutant.
How photochemical smog is 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.
What causes the 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.
Which are the primary constituent of photochemical smog?
Photochemical smog is composed of both primary pollutants like the nitrogen oxides and hydrocarbons and the secondary pollutants like the PAN, ozone.
How is photochemical smog formed?
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 causes 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.
What are the primary pollutants?
Types of primary pollutants include:
- Nitrogen oxides (NOx)
- Carbon monoxide (CO)
- Volatile organic compounds (VOCs)
- Sulfur oxides (SOx)
- Particulate matter (PM)
- Mercury.
- and more.
Sep 3, 2018
How are primary pollutants formed?
A primary pollutant is an air pollutant emitted from a source directly into the atmosphere. The source can be either a natural process such as sandstorms and volcanic eruptions or anthropogenic (influenced by humans) such as industrial and vehicle emissions.
What are primary air pollutants?
Primary air pollutants: Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide.
Is smog a primary or secondary pollutant?
Smog is an example of a secondary pollutant.