Synthesis of Bimetallic Magnetic Complexes for Efficient Removal of Flusilazole

Abstract

The purpose of this study was to exploit the advantages of bimetallic MOF material as adsorbents to reduce the potential negative impacts of flusilazole on the environment. Specifically, Fe 3 O 4 @CeO 2 @MOF-5(Zn-Co), which was a magnetic bimetallic MOF composite material, was synthesized and applied as an adsorbent to removal of flusilazole from the environment. The specific surface area and adsorption capacity of this bimetallic magnetic MOF material was proved to be significantly higher than those of traditional single MOF materials. Moreover, the adsorption process was more suitable to be described by pseudo-first-order kinetic model and Langmuir isothermal model. The adsorption mechanisms of Fe 3 O 4 @CeO 2 @MOF-5(Zn-Co) for flusilazole involved pore filling, surface complexation, covalent bonding, π-π stacking effect and hydrogen bonding. After 5 adsorption-desorption cycles, the adsorbent can still maintain a high removal efficiency. Responsibly, the Fe 3 O 4 @CeO 2 @MOF-5(Zn-Co) synthesized in this work provides a simple and feasible method for removal of flusilazole from environmental water samples and proposes an idea for the application of bimetallic MOFs.

Keywords: Flusilazole, Bimetallic MOFs, Magnetic adsorbent, Removal, High performance liquid chromatography.