The efficient removal of organic pollutant over magnetic mesoporous polymer

Nanoporous polymers due to their abundant pores and organic frameworks are very suitable for the adsorption of organic pollutants in aqueous solution. However, the difficulty in separation and recovery limit their widely practical applications. Herein, polydivinylbenzene was first synthesized by solvothermal method, then magnetic Fe3O4 precursors were incorporated into the polymer framework to obtain magnetic polydivinylbenzene, designated as Fe3O4/PDVB. The as-prepared magnetic mesoporous polymer possessed rich porous structure, high specific area of 444.7 m(2)/g, pore size of 8.9 nm and pore volume of 0.82 cm(3)/g, which were fully verified by various characterization techniques. Noticeably, Fe3O4/PDVB showed efficient and fast adsorption rate to dye Rhodamine B, and the adsorption capacity reached 85.81 mg/g within 15 min. Moreover, the magnetic polymer can be easily separated by external magnetic field after adsorption and facilely recovered by ethanol extraction, which benefit its large-scale applications in the environmental protection, especially in the chemical accident remediation.