Use of Ozone For Improving of Water Quality and Its Chemical Effects

Abstract

In recent years, ozone is a disinfectant frequently used for enhancing water quality. However, since its short half-life and relatively low solubility in water, it is not possible to ensure its presence continuously in distribution system. Hence, ozone can only be used as a primary disinfectant. After ozonization, in order to complete the disinfection process in the distribution system, a secondary disinfectant like chlorine, chlorodioxide and monochloramine must be used. As well as odor in water, and inorganic materials such as iron and manganese, ozone effectively removes organic matter, drug residues and pesticides mixed into the water for any reason by oxidation from media. When used appropriately and in the correct amount ozone is an efficient chemical and microbiological disinfectant. However, when ozone is used in unfavorable conditions and/or in large quantities, it can cause the production of unwanted by-products. Ozone shows its disinfection effect through oxidation properties and high reactivity. The effect mechanism of ozone in water is depended on many parameters, mainly on pH. While ozone effects in molecular form at acidic conditions, hydroxyl radical forms are dominant in much higher pH values. By-products formed by both of the mechanisms are different from each other. OZET