• Secondary air pollutants

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1.A primary pollutant is an air pollutant emitted directly from a source A secondary pollutant is not directly emitted as such, but forms when other pollutants primary pollutants react in the atmosphere

2.What Are The Differences Between Primary And Secondary Pollutants Primary pollutants are produced directly from a source but secondary pollutants are produced by reactions between primary pollutants and other chemicals Motor vehicle emissions are a type of primary pollutant Pollutants Released Into The Environment Research on environmental health has indicated an increased

3.Secondary pollutants are defined as pollutants in our environment that are formed when other primary pollutants interact with the atmosphere Unlike primary pollutants, which are air, water or soil pollutants that are emitted directly from a particular source, secondary pollutants pollute our environment indirectly and are not emitted from a

4.The Clean Air Act, which was last amended in 1990, requires EPA to set National Ambient Air Quality Standards 40 CFR part 50 for pollutants considered harmful to public health and the environment The Clean Air Act identifies two types of national ambient air quality standards Primary standards

5.The pollutants that are emitted directly from a combustion process are called "primary pollutants" When emitted into the atmosphere, these primary pollutants combine with other reactants and form "secondary" pollutants

6.PANs are secondary pollutants,whose secondary reactions create peroxyacyl radicals, which combine with nitrogen dioxide to form peroxyacyl nitrates The most common peroxyacyl radical is peroxyacetyl, which can be formed from the free radical oxidation of acetaldehyde, various ketones, or the photolysis of dicarbonyl compounds such as methylglyoxal or diacetyl Since they dissociate quite

7.5 Primary pollutants persist in the form they are released in the environment Secondary Pollutants: 1 The pollutants develop as a result of interaction of primary pollutants and environmental constituents

8.Groundlevel ozone is a colorless and highly irritating gas that forms just above the earth's surface It is called a "secondary" pollutant because it is produced when two primary pollutants react in sunlight and stagnant air

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