What is the primary advantage of using chloramines in water treatment?

What is the primary advantage of using chloramines in water treatment?

• A. They have a higher oxidation potential than chlorine
• B. They provide a longer-lasting disinfectant residual
• C. They are less toxic
• D. They are more effective in lower pH levels

Answer: (B)

The primary advantage of using chloramines in water treatment lies in their ability to provide a longer-lasting disinfectant residual. Chloramines, which are formed when chlorine is combined with ammonia, tend to persist in the water distribution system longer than free chlorine. This characteristic enables chloramines to effectively maintain disinfection throughout the water supply network, reducing the risk of microbial regrowth and ensuring that treated water remains safe for consumption over extended distances and periods. In contrast, the other options do not accurately capture this significant benefit. While chloramines do exhibit some differences in toxicity and effectiveness across various pH levels compared to chlorine, their most notable advantage is indeed their longevity in the water system, which is critical for maintaining water quality and safety.

The primary advantage of using chloramines in water treatment lies in their ability to provide a longer-lasting disinfectant residual. Chloramines, which are formed when chlorine is combined with ammonia, tend to persist in the water distribution system longer than free chlorine. This characteristic enables chloramines to effectively maintain disinfection throughout the water supply network, reducing the risk of microbial regrowth and ensuring that treated water remains safe for consumption over extended distances and periods.

In contrast, the other options do not accurately capture this significant benefit. While chloramines do exhibit some differences in toxicity and effectiveness across various pH levels compared to chlorine, their most notable advantage is indeed their longevity in the water system, which is critical for maintaining water quality and safety.