biostudies-literatureHou YStrategic Priority Research Program of the Chinese Academy of Sciences, ChinaFujian Natural Science Foundation ProjectNational Key R&D Project717https://www.ebi.ac.uk/biostudies/studies/S-EPMC11510796biostudies-literatureUnknown12(10)In the environmental field, the advancement of new high-efficiency heavy metal adsorption materials remains a continuous research focus. A novel composite, covalent organic framework-modified biochar (RH-COF), was fabricated via an in-situ polymerization approach in this study. The COF-modified biochar was characterized by elemental analysis, BET analysis, SEM, FT-IR, and XPS. The nitrogen and oxygen content in the modified material increased significantly from 0.96% and 15.50% to 5.40% and 24.08%, respectively, indicating the addition of a substantial number of nitrogen- and oxygen-containing functional groups to the RH-COF surface, thereby enhancing its adsorption capacity for Cd from 4.20 mg g^-1 to 58.62 mg g^-1, representing an approximately fourteen-fold increase.ToxicsEnhanced Adsorption of Cadmium by a Covalent Organic Framework-Modified Biochar in Aqueous Solution.PMC115107962021J013142023YFC3709700XDA23030202Cai CLin SFan JZhang YHou YJing GfalseEnhanced Adsorption of Cadmium by a Covalent Organic Framework-Modified Biochar in Aqueous Solution.In the environmental field, the advancement of new high-efficiency heavy metal adsorption materials remains a continuous research focus. A novel composite, covalent organic framework-modified biochar (RH-COF), was fabricated via an in-situ polymerization approach in this study. The COF-modified biochar was characterized by elemental analysis, BET analysis, SEM, FT-IR, and XPS. The nitrogen and oxygen content in the modified material increased significantly from 0.96% and 15.50% to 5.40% and 24.08%, respectively, indicating the addition of a substantial number of nitrogen- and oxygen-containing functional groups to the RH-COF surface, thereby enhancing its adsorption capacity for Cd from 4.20 mg g^-1 to 58.62 mg g^-1, representing an approximately fourteen-fold increase.2024-01-01T00:00:00Z2024 Sep2025-04-04T03:04:00.818Z2025-04-04T03:04:00.818ZS-EPMC115107963945313710.3390/toxics12100717