Which one of the following is not used for disinfection of drinking water?
Correct answer: D. Phenyl
- A. Chlorine
- B. Ozone
- C. Chlorine dioxide
- D. Phenyl
Explanation
Chlorine is one of the most widely used disinfectants for water treatment. It is effective at killing a wide range of microorganisms and has a residual effect, providing continued protection as water flows through the distribution system. However, excessive chlorination can lead to the formation of disinfection byproducts (DBPs), some of which are of concern for health.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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