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Contaminants Water Pollution

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1.3.2. Industry: Is the main source of water pollution in the world. The effluents from industries are harmful for both human and aquatic life. Large amount of waste is released from industries such as paper and pulp industry, food processing industries, leather industries, pharmaceutical industries etc. The main contaminants are:
• Lead: is a metallic substance that can cause health and environment problem and it is non-biodegradable. They are harmful to many animals and plants which can prevent the action of bodily enzymes.
• Phosphates: it is mainly responsible for eutrophication of lakes.
1.3.3. Agricultural wastes: The use of new methods in agriculture involves the use of chemical fertilizer, pesticides. This has resulted in increase of agricultural …show more content…

Radioactive wastes: These are another sources of water pollution. Radioactive substances are used in nuclear power plants, medical & other scientific processes. These substances can found in watches, x-rays machinery, and television sets. There are many naturally occurring radioisotopes from organisms and within the environment. If radioactive wastes are not disposed properly then it can result in water pollution.
1.3.5. Natural sources of water pollution: Water pollution can take place naturally due to erosion in water and it is caused by rainfall and runoff on a slope and if the minerals, leaves of plants, human materials, get mixed with water. And the toxic elements like Arsenic, lead, cadmium and mercury etc. get mixed in water and if the toxic elements are in large quantity then optimal concentration then it will pollute water.
1.3.6. Thermal sources of water pollution: Thermal pollution is generated by power plants. Industrial sources such as pulp and paper mills, petroleum refineries, chemical plants. Warm water from these industries domestic areas directly discharged into the rivers, lakes and other water bodies. Change of temperature of water will cause water pollution.
CHAPTER-2
LITERATURE

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