Iron & manganese present as pollutant in water cannot be removed by__________________?
Correct answer: C. Chlorination
- A. Ion exchange process
- B. Oxidation followed by settling & filtration
- C. Chlorination
- D. Lime soda process or manganese zeolite process
Explanation
Chlorination can oxidise iron and, to a limited extent, manganese, but it does not by itself remove the resulting precipitates from water; clarification or filtration is required. Ion exchange, oxidation followed by settling and filtration, and lime-soda or manganese-zeolite treatment are established removal methods.
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