Abstract
Photocatalysis with persulfate (PS) is an effective method for the degradation of degrading organic pollutants. In this study, Fe3O4/MIL-101(Fe), a magnetic heterojunction photocatalyst, was produced using a hydrothermal method. The material coupled with PS exhibited excellent removal efficiency for oxytetracycline (OTC) (87.1%, 1h). And it has a wide range of applications, with good removal efficiency for OTC concentrations of 30 to 70mg/L and pH values of 3 to 9. •SO4- and •OH played a major role in the OTC removal reaction and there was an Fe(III)/Fe(II) cycle during the reaction. With excellent stability and recoverability, the OTC removal efficiency decreased by only 4.29% after four cycles, and the Fe leaching did not exceed 0.035mg/L per cycle. This study provides significant insights into the removal of organic pollutants from water bodies.
Highlights
Oxytetracycline (OTC) is a broad-spectrum antimicrobial agent of the tetracycline family, widely used in animal and human medicine
The stability, recyclability and recoverability of the materials were investigated, and we further explored the mechanism of the Fe3O4@MIL-101/PS/vis system for the degradation of OTC
In combination with X-ray photoelectron spectroscopy (XPS) analysis of the used material (Fig. 3b), the results showed that the structure of the material remained virtually unchanged, demonstrating the excellent stability of the material
Summary
Oxytetracycline (OTC) is a broad-spectrum antimicrobial agent of the tetracycline family, widely used in animal and human medicine.
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