One step preparation of biomass based magnetic porous carbon and efficient adsorption of CBZ

In order to utilize waste agricultural and forestry biomass as resources and effectively remove carbamazepine (CBZ) from water. Inspired by the leavening strategy, poplar sawdust was transformed into magnetic porous carbon (MPC) with developed pore structure by using KHCO3 as activator and FeCl3•6H2O as magnetic precursor. The optimum product MPC-2-0.3 was prepared by adjusting the ratio of raw materials. Its specific surface area was 1002.48m2/g and the CBZ adsorption capacity of 50mg/L was 202.70mg/g. SEM and XRD showed that Fe nanoparticles were successfully doped into porous carbon, giving porous carbon excellent magnetic separation ability. The kinetics and isotherms of the adsorption process were more in line with the pseudo second-order kinetics and Langmuir model. It was clarified that the main adsorption mechanisms were adsorption sites, π-π interaction and hydrogen bonding. MPC-2-0.3 had excellent adsorption performance at room temperature and a wide pH range, and it was easy to separate and regenerate. © 2022, Editorial Board of China Environmental Science. All right reserved.