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Answer: 1. water treatment these impurities classified in different categories like non ionic impurities or undissolved impurities ,Ionic impurities or dissolved impurities, Gaseous impurities. These impurities are discussed below in brief way.Ionic impurities or dissolved impurities.
2.Sources of Water Pollution
Sewage (Waste Water)
Agricultural Pollution.
Oil Pollution.
Radioactive Substances.
River dumping.
Marine Dumping.
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