Question
Download Solution PDFAeration technique of water treatment is used for the removal of
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Volatile Organic Compounds (VOCs)
Important PointsAeration is a commonly used water treatment process where air is circulated through, mixed with or dissolved in water. The main purposes of aeration are:
- To increase the oxygen saturation of the water.
- This aids in the biological degradation of organic substances and prevents conditions that favor anaerobic bacteria.
To remove dissolved gases such as carbon dioxide, methane, hydrogen sulfide, and others.
- These gases, if not removed, can cause off-tastes and odors, corrosion problems, and can be harmful to health in high concentrations.
To remove volatile organic compounds (VOCs).
- These are organic chemicals that have a high vapor pressure at ordinary room temperature.
- Their high vapor pressure results from a low boiling point, which causes large numbers of molecules to evaporate or sublimate from the liquid or solid form of the compound and enter the surrounding air.
- So, among the options provided, aeration is used for the removal of Volatile Organic Compounds (VOCs).
- It's not typically used for the removal of Persistent Organic Pollutants (POPs), hardness, or metals.
- These substances require other water treatment techniques for their removal.
- For instance, hardness is usually treated by ion exchange processes or lime softening, and metals can be removed by processes like precipitation, ion exchange, and membrane filtration.
Last updated on Jun 19, 2025
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