Nitrogen‐Rich Covalent Organic Frameworks as Selective Adsorbents of Metallic Pollutants From Water

The removal of heavy metal ions from wastewater is a crucial step in ensuring the availability of safe, consumable water. Therefore, efficient water treatment is essential for maintaining a high quality of life both in the short and long term. Among the various methods used for pollutant removal from the environment—particularly from water and soil—adsorption remains one of the most effective and systematic approaches for capturing undesirable substances. Porous organic materials have been widely employed as adsorbents for both organic and inorganic pollutants in wastewater. In this study, RIO‐12 and RIO‐23 were selected as microporous and mesoporous adsorbents, respectively, for the removal of Li + , Pb 2+ , and Al 3+ ions. The results indicate that adsorption capacity is influenced by both pore size and the chemical structure of the material’s lattice. Additionally, density functional theory (DFT) calculations were performed to provide computational insights into these complex interactions.