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The disinfection efficiency of chlorine in Water treatment
- a)is not dependent of pH value
- b)is increase by increased pH value
- c)remains constant at all pH values
- d)is reduced by increased pH values
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The disinfection efficiency of chlorine in Water treatmenta)is not dep...
The disinfection efficiency of chlorine in Water treatment reduces if pH goes above 8. Generally pH slightly less than 7 is recommended for effective treatment.
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The disinfection efficiency of chlorine in Water treatmenta)is not dep...
Understanding Chlorine Disinfection Efficiency
Chlorine is widely used as a disinfectant in water treatment processes. Its effectiveness can vary based on several factors, one of which is the pH level of the water.
Impact of pH on Chlorine's Effectiveness
- Chlorine Species: At different pH levels, chlorine exists in various forms, primarily as hypochlorous acid (HOCl) and hypochlorite ion (OCl-). Hypochlorous acid is the more effective disinfection agent.
- Increased pH Levels: As pH increases, the proportion of hypochlorous acid decreases and the hypochlorite ion increases. This shift results in reduced disinfection capability because OCl- is less effective at killing pathogens compared to HOCl.
Optimal pH Range
- Ideal pH Levels: The optimal pH range for chlorine disinfection is typically between 6.5 and 7.5. Within this range, a higher concentration of hypochlorous acid is maintained, enhancing disinfection efficiency.
Conclusion
- Reduced Efficiency: As pH values rise above this optimal range, the efficiency of chlorine as a disinfectant diminishes significantly. This reduction can lead to increased survival of harmful microorganisms in treated water.
In summary, chlorine disinfection efficiency is indeed reduced by increased pH values, making it crucial to monitor and adjust pH levels in water treatment processes to ensure effective disinfection.
Chlorine is widely used as a disinfectant in water treatment processes. Its effectiveness can vary based on several factors, one of which is the pH level of the water.
Impact of pH on Chlorine's Effectiveness
- Chlorine Species: At different pH levels, chlorine exists in various forms, primarily as hypochlorous acid (HOCl) and hypochlorite ion (OCl-). Hypochlorous acid is the more effective disinfection agent.
- Increased pH Levels: As pH increases, the proportion of hypochlorous acid decreases and the hypochlorite ion increases. This shift results in reduced disinfection capability because OCl- is less effective at killing pathogens compared to HOCl.
Optimal pH Range
- Ideal pH Levels: The optimal pH range for chlorine disinfection is typically between 6.5 and 7.5. Within this range, a higher concentration of hypochlorous acid is maintained, enhancing disinfection efficiency.
Conclusion
- Reduced Efficiency: As pH values rise above this optimal range, the efficiency of chlorine as a disinfectant diminishes significantly. This reduction can lead to increased survival of harmful microorganisms in treated water.
In summary, chlorine disinfection efficiency is indeed reduced by increased pH values, making it crucial to monitor and adjust pH levels in water treatment processes to ensure effective disinfection.
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The disinfection efficiency of chlorine in Water treatmenta)is not dependent of pH valueb)is increase by increased pH valuec)remains constant at all pH valuesd)is reduced by increased pH valuesCorrect answer is option 'D'. Can you explain this answer?
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