Question

Why are chlorine compunds preferred over ozone gas for disinfection of drinking water?

Answer 1

Explanation:

When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules. One chlorine atom can destroy over 100,000 ozone molecules before it is removed from the stratosphere. ... When they break down, they release chlorine or bromine atoms, which then deplete ozone.

Answer 2

Chlorine compunds preferred over ozone gas for disinfection of drinking water:

• It is very relevant and very useful for the 'deactivation' of 'pathogenic microorganisms'. It is fairly persistent and relatively cheap.

• Chlorine destroys pathogens such as 'bacteria and viruses' through breaking the 'chemical bonds' .

• Chlorine 'compounds' which can change atoms with another compound, such as 'enzymes in bacteria' and other cells.

• When enzymes get in contact with chlorine, one or more of the hydrogen atoms in the molecule are replaced by chlorine.

• This makes the molecule 'change shape'. When enzymes will not work correctly, a 'cell or bacterium' will die.

• Ozone gas is a powerful oxidant, its effectiveness does not depend upon the pH value, temperature or ammonia content in the water.

• But it is not used because it is unstable whereas chlorination method is a stable process, it is effective and economical favourable.

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