Non degradable pollutants
1. Degradable pollutants can be decomposed or degraded easily.
2. Decomposition takes place by microorganisms and it requires less time.
3. These pollutants again enter the biogeochemical cycles and become part of the natural nutrient cycle.
1. Non – degradable pollutants cannot be easily decomposed.
2. It requires more time and different techniques for decomposition.
3. These pollutants will remain on the earth for years and create environmental pollution.
1. Primary pollutants are the pollutants that are emitted directly from the sources and are found in the atmosphere in the form in which they were emitted.
2. Examples: Ash, smoke, radioactive compounds, oxides of sulphur etc.
1. Secondary pollutants are the pollutants that are formed in the atmosphere by chemical reactions between primary pollutants and atmospheric constituents.
2. Examples: SO3 m O3 , Ketones, Peroxyacetyl nitrate.