12. water and its impurities
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12. water and its impurities

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12. water and its impurities 12. water and its impurities Presentation Transcript

  • HEALTH EDUCATION WATER & IT’S IMPURITIES
  • WATER
    • Water that has no impurity is called pure water
    • Pure water is a very important constituent of food
    • Every cell in our body contains about 90% of water
    • Necessary to maintain the fluidity of blood, digestion, excretion, maintaining body temp
    • Used for washing, cooking etc
  • WATER
    • Purest form of water is distilled water - used for daily life activities , preparation of medicines
    • Second form of pure water is rainwater after the first few showers-can be used like distilled water
    • Water form deep wells is also quite pure but water from taps and tanks must be purified before storing and utilisation.
    • Impurities in water are of different forms and kinds
  • IMPURITIES OF WATER
    • When water flows from hills into plains it carries finely divided clay, sand , mineral particles, animal & veg matter, refuse from houses ,factories in suspended form as impurities
    • Impurities - either organic or inorganic
    • Presence of sulphates, chlorides, bicarbonates of calcium, magnesium and iron make water hard
    • Salts cause certain diseases like gall , kidney stones & goitre  
  • IMPURITIES OF WATER
    • Hard seawater causes diarrhoea
    • Water stored in tanks & ponds - very harmful - gets contaminated by sewage & other refuses generally accumulated by washing clothes and animals
    • Water stored in pitchers also gets contaminated by germs if not cleaned regularly