What are the three forms of chlorine commonly used for disinfection?

The three forms of chlorine commonly used for disinfection are chlorine gas, calcium hypochlorite, and sodium hypochlorite. Chlorine gas is frequently utilized in water treatment as it is a potent disinfectant, effectively eliminating bacteria, viruses, and other pathogens. Calcium hypochlorite is often used in solid or granular form and is another powerful disinfectant widely applied in swimming pools and potable water treatment. Sodium hypochlorite is the active ingredient in household bleach and is used for disinfection in various applications, including water treatment and sanitation.

Other choices include components that are not recognized as primary forms of chlorine disinfectants. For example, sodium sulfate and ammonium chloride do not possess the same disinfecting properties associated with chlorine compounds. Bromine is also not a form of chlorine, although it is sometimes used as an alternative disinfectant. Hydrogen peroxide, while a disinfectant, is not a form of chlorine. Understanding the specific uses of different chemical disinfectants is crucial in utilities maintenance to ensure effective water treatment and public health safety.