Ontario Operator-in-Training (OIT) Practice Exam

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What does the oxidation process involve in water treatment?

Addition of hydrogen
Removal of oxygen
Removal of electrons
Conversion of inorganic matter

The correct answer is: Removal of electrons

The oxidation process in water treatment primarily involves the removal of electrons from a substance, which leads to the substance being oxidized. In the context of water treatment, this is crucial for breaking down contaminants and purifying water. Oxidation reactions can help to degrade complex organic molecules into simpler, less harmful compounds or to convert harmful substances into less toxic forms. For instance, in the presence of strong oxidizers, organic pollutants can be oxidized, enhancing the effectiveness of the treatment process. This removal of electrons is fundamental because it changes the oxidation state of the contaminant, facilitating its transformation or removal from the water system. Understanding the process of oxidation is essential for water operators in order to implement effective treatment methods and evaluate their impact on water quality, including the breakdown of pathogens and other harmful substances.