Massachusetts Wastewater Practice Exam

Which oxidizing agent is commonly used to treat industrial wastewater?

1. Ferrous sulfate

2. Hydrogen peroxide

3. Sodium metabisulfite

4. Sulfur dioxide

The correct answer is: Hydrogen peroxide

Hydrogen peroxide is widely recognized as an effective oxidizing agent for the treatment of industrial wastewater. Its utility stems from its strong oxidation potential, which allows it to break down complex organic compounds, facilitate the removal of pollutants, and inactivate pathogens. The oxidation process can significantly enhance the biodegradability of the wastewater, enabling more efficient treatment through biological processes. Additionally, hydrogen peroxide decomposes into water and oxygen, which minimizes the introduction of residual chemicals into the environment, making it a favorable choice for industries seeking sustainable practices. Its effectiveness in removing toxins and its minimal environmental impact contribute to its popularity in various oxidizing applications within wastewater treatment. In contrast, ferrous sulfate, while it does have some applications in wastewater treatment, primarily acts as a coagulant rather than an oxidizing agent. Sodium metabisulfite is more commonly used as a reducing agent, especially in dechlorination processes, and sulfur dioxide also functions mainly as a reducing agent in specific contexts. Therefore, the selection of hydrogen peroxide as the correct choice highlights its specific role in oxidation processes within industrial wastewater treatment.