Paper 1 · People, Development and Environment
UGC NET December 2022 (02.03.2023) Shift-II
The aeration technique of water treatment is used for the removal of
APersistent Organic Pollutants (POPs)
BVolatile Organic Compounds (VOCs) ✓ Correct
CHardness
DMetals
Correct answer: (B) Volatile Organic Compounds (VOCs) — Aeration is used to remove volatile organic compounds, so the answer is volatile organic compounds.
Explanation
★Aeration is used to remove volatile organic compounds, so the answer is volatile organic compounds.
★Aeration passes air through the water to bring the two into close contact.
★Volatile organic compounds evaporate easily from the water into the air.
★So the aeration process drives these compounds out of the water.
★This makes aeration effective at removing volatile organic compounds.
★It is not the main method for removing persistent pollutants, hardness or metals.
★So the answer is volatile organic compounds.
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