Water Treatment Methods

This article discusses four methods of water treatment: boiling, treatment with excess lime, treatment with ozone, and chlorination. It also explains the chemistry of chlorine and how it is used to disinfect water.

Questions

• What are the four methods of water treatment discussed in this article?
• What is the chemistry of chlorine and how is it used to disinfect water?
• What are the advantages and disadvantages of each method of water treatment?

Answers

• The four methods of water treatment discussed in this article are boiling, treatment with excess lime, treatment with ozone, and chlorination.
• Chlorine is a powerful oxidizing agent that can kill bacteria and other microorganisms. It is added to water as a gas or as a salt, such as sodium hypochlorite.
• The advantages of chlorination include its effectiveness in killing bacteria and its low cost. However, chlorine can also react with organic matter in water to form chlorinated compounds, some of which can be harmful to human health.