| Summary: | Nanotechnology enables the control of matter at nanoscale and the creation of materials that have properties with a specific function, which allows its application in many fields.
The Fields that are most affected by nanotechnology in environmental applications including water treatment are divided into: treatment and remediation, sensing and detection and pollution control. The use of nanostructured iron oxides like maghemite has been deeply studied due to the advantages that this material has in comparison to other materials. Its characteristics include its low cost, ease of separation through external magnetic fields, high surface area, high adsorption capacity and efficient action as a photocatalyst. This facilitates its use in processes such as coagulation flocculation. Considering this context, the present study, which is a bibliographic review, aims to contribute with the current bibliography about the use of nanoparticles of iron oxide in water treatment. Given the topic approached, it was possible to know the different methodologies proposed to obtain magnetic nanoparticles as well as their various applications focused on wastewater and water supply treatment.
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