The sewage treatment systems in the cities demand small and efficient technologies that can eliminate both traditional and emerging pollutants. However, the practical use of the high-technology adsorbents in real-life situations of municipal wastewater is still limited. Engineering usage of high-performance adsorbents, such as the granular activated carbon (GAC), activated biochar, and Fe₃O₄-functionalized biochar composites, was examined in this work using actual municipal sewage samples of lar