Which chemical is often used in water treatment for the removal of iron and manganese?

The procedure for removing iron and manganese from water typically involves the oxidation of these metals, making them easier to filter out. Chlorine is an effective oxidizing agent that can facilitate this process. When chlorine is added to water containing dissolved iron and manganese, it reacts with these metals to convert them into their oxidized forms, which are insoluble. This precipitated form can then be effectively removed through filtration.

In contrast, while fluoride is used in water treatment for dental health reasons, it does not play a role in removing iron and manganese. Ozone can also act as an oxidant, but its use is generally less common in typical water treatment processes due to factors like cost and the need for special equipment. Aeration can assist in the removal of dissolved gases and some volatile compounds, and it can help oxidize metals but is more effective in combination with other methods. Chlorine is a well-established choice specifically for the target contaminants of iron and manganese.