Synthesis of bimetallic magnetic complexes for efficient removal of flusilazole

• Published in: Journal of environmental chemical engineering 2022-12, Vol.10 (6), p.108969, Article 108969
• Main Authors: Zhou, Dong-Dong, Chen, Min, Lu, Zhi-Heng, Cao, Yi-Wen, Zhuang, Lv-Yun, Liu, Xiao, Yang, Zhong-Hua, Tian, Qin
• Format: Article
• Language: English
• Subjects: Bimetallic MOFs; Flusilazole; High performance liquid chromatography; Magnetic adsorbent; Removal
• ISSN: 2213-3437; 2213-3437
• DOI: 10.1016/j.jece.2022.108969

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, Fe3O4@CeO2@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. The optimal experimental conditions were obtained by single factor analysis of controlled variables: the amount of adsorbent was 20 mg, the initial pH of the solution was 9.0%, and 6% sodium chloride was added. Moreover, the adsorption process was more suitable to be described by pseudo-first-order kinetic model and Langmuir isothermal model. The adsorption mechanisms of Fe3O4@CeO2@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 Fe3O4 @CeO2 @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. [Display omitted] •Bimetallic MOF materials Fe3O4@CeO2@MOF-5 as adsorbents.•The adsorption mechanism involves the π-π stacking effect and hydrogen bonding.•The Fe3O4@CeO2@MOF-5(Zn-Co) showed excellent reusability and stability.•It provides a feasible idea for the application of bimetallic MOF.