What chemical is used in both water purification and sewage treatment to give long-term disinfection?

Question

Quizplus · Accepted Answer

Chlorine is commonly used in both water purification and sewage treatment to provide long-term disinfection. It is effective in killing a wide range of microorganisms and can remain active in water for an extended period, providing ongoing disinfection. Fluorine is not commonly used for disinfection as it is primarily added to water supplies to promote dental health. Activated charcoal is used to remove organic impurities from water, but it does not provide disinfection. Copper sulfate is a fungicide and algaecide and is not commonly used in water treatment for disinfection purposes.

What Chemical Is Used in Both Water Purification and Sewage