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Disinfectants for Water Treatment and pH Effects

Disinfectants for Water Treatment and pH Effects

In this video, Professor discusses the effectiveness and limitations of common disinfectants used to treat drinking water.

Chlorine and hypochlorite are the most widely used disinfectants due to their cost-effectiveness, while ozone is more expensive but also effective. Hypochlorous acid is more effective at lower pH levels. Chloramines are less efficient than free chlorine. Disinfection byproducts (DBPs), such as trihalomethanes and haloacetic acids, can form when disinfectants react with natural organic matter (NOM) in the water. By understanding the formation of DBPs, facilities can work towards achieving SDG 3: Good Health and Well-being while ensuring access to safe and affordable drinking water for everyone to achieve SDG 6.

Review Questions:

  • What is the pKa value for the hypochlorous acid and hypochlorite ion reaction?
  • What is the difference between free chlorine and combined chlorine?
  • What are some common disinfection byproducts that can form when disinfectants react with natural organic matter?
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Sustainable Development in Health and Ecology

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