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Differentiate between primary & secondary pollutants.
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written 5.2 years ago by |
Primary Pollutants | Secondary Pollutants |
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A primary pollutant is an air pollutant emitted from a source directly into the atmosphere. | A secondary pollutant is an air pollutant formed in the atmosphere as a result of the chemical or the physical interactions between the primary pollutants themselves or between the primary pollutants and other atmospheric components. |
Examples of primary pollutants include sulfur dioxide (SO2), carbon monoxide (CO), nitrogen oxides (NOX), and particulate matter(PM). | Examples of secondary pollutants include photochemical oxidants (ozone, nitrogen dioxide, sulfur trioxide) and secondary particulate matter. |