An efficient method to enrich, detect and remove bisphenol A based on Fe3O4@MIL-100(Fe)

摘要

The development of an effective and convenient pretreatment technology for the removal of contaminants from drinking water is crucial to public health. In this study, a novel durian-shaped magnetic porous Fe3O4@MIL-100 (Fe) composite was prepared by solvothermal method for the removal of bisphenol A(BPA) from drinking water. Various techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and nitrogen adsorption-desorption were employed to characterize the composite. The results showed that the Fe3O4@MIL-100(Fe) composite possessed a core-shell structure with a specific surface area of 365.42 m(2) g(-1) and a BPA adsorption capacity of more than 90 mg g(-1). In addition, the Fe3O4@MIL-100(Fe) composite exhibited good reusability, with a retained adsorption rate of 87% and no significant loss in adsorption capacity after five cycles. Under optimal conditions, this material showed good linear adsorption of BPA from drinking water in the 0 to 50 mg L-1 concentration range. After selective adsorption, BPA was detected at a wavelength of 276 nm by UV/vis spectrophotometry with a detection limit of 5000 ng L-1.