Pollution is defined as an addition or excessive addition of certain materials to the physical environment (water, air and lands), making it less fit or unfit for all times

POLLUTANTS *Pollutants are the materials or factors, which cause adverse effect on the natural quality of any component of the environment.

*As an example , smoke from industries and automobiles, chemicals from factories, radioactive substances from nuclear plants, sewage of homes and discarded house hold articles are the common pollutants.



:Classifications

(1) consistent with the shape during which they persist after release into the environment.

*Primary pollutants: These continue the shape during which they’re added to the environment e.g. DDT, plastic. • Secondary Pollutants: These are formed by interaction among the first pollutants.

*For instance , peroxyacetyl nitrate (PAN) is formed by the interaction of oxide s and hydrocarbons.

(2) consistent with their existence in nature.

* Quantitative Pollutants: These occur in nature and be come pollutant when their concentration reaches beyond a intensity . Eg, CO2 , nitrogen oxide.

* Qualitative Pollutants: These don’t occur in nature and are man-made. E.g. fungicides, herbicides, DDT etc.

(3)consistent with their nature of disposal.

*Biodegradable Pollutants: Waste products, which are degraded by microbial action. E.g. sewage.

* Non-biodegradable Pollutants: Pollutants, which are not decomposed by microbial action. E.g. plastics, glass, DDT, salts of heavy metals, radioactive substances etc..)

(4)consistent with origin

*Natural

*Anthropogenic

*Causes of pollution

*Uncontrolled growth in human population

*Rapid industrialization

*Urbanization

* Uncontrolled exploitation of nature.

* Forest fires, radioactivity, volcanic eruptions, strong winds etc.,Pollution is defined as an addition or excessive addition of certain materials to the physical environment (water, air and lands), making it less fit or unfit for all times

POLLUTANTS *Pollutants are the materials or factors, which cause adverse effect on the natural quality of any component of the environment.

*As an example , smoke from industries and automobiles, chemicals from factories, radioactive substances from nuclear plants, sewage of homes and discarded house hold articles are the common pollutants.



:Classifications

(1) consistent with the shape during which they persist after release into the environment.

*Primary pollutants: These continue the shape during which they’re added to the environment e.g. DDT, plastic. • Secondary Pollutants: These are formed by interaction among the first pollutants.

*For instance , peroxyacetyl nitrate (PAN) is formed by the interaction of oxide s and hydrocarbons.

(2) consistent with their existence in nature.

* Quantitative Pollutants: These occur in nature and be come pollutant when their concentration reaches beyond a intensity . Eg, CO2 , nitrogen oxide.

* Qualitative Pollutants: These don’t occur in nature and are man-made. E.g. fungicides, herbicides, DDT etc.

(3)consistent with their nature of disposal.

*Biodegradable Pollutants: Waste products, which are degraded by microbial action. E.g. sewage.

* Non-biodegradable Pollutants: Pollutants, which are not decomposed by microbial action. E.g. plastics, glass, DDT, salts of heavy metals, radioactive substances etc..)

(4)consistent with origin

*Natural

*Anthropogenic

*Causes of pollution

*Uncontrolled growth in human population

*Rapid industrialization

*Urbanization

* Uncontrolled exploitation of nature.

* Forest fires, radioactivity, volcanic eruptions, strong winds etc.

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