Dechlorination of Water

Water dechlorination is the process of removing excess chlorine from drinking and industrial water to reduce the risk of chlorination diseases. Chlorination is an effective way to disinfect drinking and water in industry, agriculture and at home. However, excess chlorine can lead to negative consequences for human health, as well as cause corrosion of metal surfaces and increase the electrical conductivity of water, which can adversely affect electrochemical processes.

Dechlorination occurs due to the removal of free chlorine by chemical methods or substitution reactions occurring in solutions of reagents (for example, coal, hydrated magnesium oxide Mg(OH)2, or iron compounds FeSO4 and FeCl3). The redox exchange process occurs when one chlorine atom is replaced by two hydrogen atoms. To obtain a clean result, the removal of residual impurities after chlorine extraction or their further oxidation is required.

Among the most common methods of purifying water from free chlorine are the method of ozonation and ultraviolet radiation, as well as electrolytic dechlorination. Each of these methods has its pros and cons. First of all, the method requires additional costs. When choosing a water purification method, you need to take into account the installation location of the equipment and the cost of the corresponding reagents.