In wastewater treatment, oxidation is primarily used for the removal of?

Oxidation is a key process in wastewater treatment primarily aimed at breaking down organic matter. This process involves the interaction of oxygen with organic substances, facilitating their breakdown into simpler, less harmful compounds. During oxidation, organic compounds are effectively converted into carbon dioxide, water, and other forms that can be managed more easily by the treatment system.

In the context of the other options, while certain forms of cyanide can indeed be treated or neutralized using oxidation processes, it is more common to specifically associate oxidation with the removal of organic matter. Organic materials in wastewater include substances like proteins, carbohydrates, and fats, which contribute to biochemical oxygen demand (BOD). High levels of BOD can lead to oxygen depletion in aquatic environments, making the effective removal of organic matter a crucial step in wastewater treatment.

Additionally, fats and phosphorus, while they do require specific treatment methods, do not primarily involve oxidation for their removal. Fats require different processes such as physical separation or biological treatment, while phosphorus removal often focuses on chemical precipitation or biological uptake rather than oxidation.

Thus, oxidation is crucial for the breakdown and removal of organic matter, making it the most relevant answer in this context.