Which of the following are used as disinfectant during water treatment.
A. Chlorine
B. Phosphorous
C. Ozone
D. Nitrogen
E. Ultraviolet Rays
Choose the most appropriate answer from the options given below:
A, C, E Only
To determine which substances are used as disinfectants during water treatment, let's examine each given option:
- Chlorine (A): Chlorine is one of the most widely used disinfectants in water treatment. It effectively kills bacteria and other pathogens by disrupting their metabolic processes. It is known for its ability to disinfect and ensure water safety, making it a common choice in municipal water systems.
- Phosphorous (B): Phosphorous is an essential nutrient for plants but is not used as a disinfectant in water treatment processes. It can sometimes contribute to water pollution if present in excess, leading to eutrophication.
- Ozone (C): Ozone is a powerful oxidizing agent used as a disinfectant in water treatment. It effectively destroys bacteria, viruses, and other microorganisms and decomposes to oxygen, leaving no residue. It is considered an effective alternative to chlorine.
- Nitrogen (D): Nitrogen itself is not used as a disinfectant in water treatment. Although nitrogen compounds can be present in water sources, they are typically regulated rather than added for disinfection purposes.
- Ultraviolet Rays (E): Ultraviolet (UV) rays are used in water treatment as a physical method of disinfection. UV light effectively inactivates microorganisms by damaging their DNA, preventing them from reproducing. It is a chemical-free disinfection method.
Based on the above analysis, the substances used as disinfectants during water treatment are Chlorine, Ozone, and Ultraviolet Rays. Therefore, the correct answer is the set A, C, E Only.
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