The disadvantage of use of chlorinated water is:
Correct answer: D. All of the above
- A. Formation of NH4Cl , NHCl2 , NCl3 which are eye irritants
- B. Increased risk of bladder and rectal cancer by drinking water
- C. Offensive odour and taste due to chlorinated phenols.
- D. All of the above
Explanation
Disadvantages as advised by CDC guidelines for chlorinated water include following: The drawbacks of chlorination are: Relatively low protection against protozoa Lower disinfection effectiveness in turbid waters Potential taste and odor objections Must ensure quality control of solution Potential long-term effects of chlorination by-products
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About Water Pollution and Treatment
Water pollution covers biological, chemical and physical contaminants, including pathogens, toxic metals, detergents and excess nutrients. Treatment involves screening, sedimentation, coagulation, filtration, disinfection and wastewater processing, while biochemical oxygen demand, chemical oxygen demand, eutrophication and dissolved oxygen indicate pollution levels.
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