WATER POLLUTION

WATER POLLUTION

Water serves as food, and as well serves as source of cooking and cleaning agents to human. Water pollutants may be physical, biological or chemical in nature. Water is said to be polluted when there is adversely change in its quality.
However, when oil/chemical is discharged directly or indirectly into a water bodies, that water body is said to be polluted. Looking at this pollution the oil/chemical is the pollutant.

Biological pollutants is the introduction of pollutants which serves as nutrients and producing changes in the relative abundance of aquatic micro- organisms and depletion of dissolved oxygen.

Chemical pollutants is the introduction of chemicals into water body, which may affect its pH, toxicity and its salinity.
Trichloroethylene(TCE) is a common ground water pollutant. Other pollutants like Aerosols, DDT(Dichloro Diphenyl Trichloromethane) pesticides and PCB(Polychlorinated Biphenyls) are infectious agents.

The sources of water pollution are mainly the discharges of sewage from factories, waste water treatment plant, toxic chemicals, fertilizer, pesticides, waste disposal. The gaseous emissions from factories, refineries, auto mobiles contaminate the atmosphere, and later fall down as rain. This rain water can be polluted by the presence of oxide of nitrogen and sulfur in the air. These oxides dissolve in rain water to form nitric acid and sulfuric acid.

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