The process of preparau00c7u00e7o of adsorbents based on clusters of particulates magnu00c9ticas of u00e0xidos iron for environmental and industrial applications, materials adsorbing medium, and, method of treatment of water for adsoru00c7u00e7o of organic compounds or aromatic alifu00c1ticos, cu00c1 Tions metallic, radionuclu00cddeos and u00c2nions.