Metal-organic frameworks derived magnetic carbon-αFe/Fe3C composites as a highly effective adsorbent for tetracycline removal from aqueous solution

By Weiping Xiong, Zhuotong Zeng, Guangming Zeng, Zhao-hui Yang, Rong Xiao, Xin Li, Jiao Cao, Chengyun Zhou, Hong-bo Chen, Meiying Jia and 3 more. Chemical Engineering Journal, 2019

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Abstract Efficient removal of tetracycline (TCN) from aqueous solution is important for water environment security. Herein, magnetic carbon-αFe/Fe3C derived from metal-organic frameworks (MOFs) were synthesized by a carbonization method and used for TCN adsorption. The magnetic carbon-αFe/Fe3C adsorbent was characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), thermal gravimetric analyzer (TGA), X-ray photoelectron spectrum (XPS) and vibrating sample magnetometer (VSM). The resultant magnetic carbon-αFe/Fe3C exhibited outstanding TCN adsorption capacity (511.06 mg g−1) from aqueous solution due to its large specific surface area (171.72 m2 g−1) and pore volume (0.31 cm3 g−1), and abundant active adsorption sites. The main adsorption mechanisms were physisorption and chemisorption, including pore filling effect and electrostatic adsorption. Moreover, magnetic carbon-αFe/Fe3C could remove TCN at low concentrations (

Subfields: Inorganic Chemistry, Materials Chemistry, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/64323cdbba8f8367a538471be6710060d16ea1b4