期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 317, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2022.115327
关键词
MIL-101(Fe); Z-scheme heterojunction; Advanced oxidation technology; Wastewater treatment; Magnetic particles
资金
- Scientific Research Foundation of Hunan Provincial Education Department [21A0188, 21B0280, 19A032]
- Engineering and Technical Center Open Fund of Hunan Provincial Environmental Protection for River-Lake Dredging Pollution Control [EPD202104]
- Natural Science Foundation of Hunan Province [2021JJ30728]
- National Natural Science Foundation of China [51809019]
- Innovation and Entrepreneurship Training Program for college students in Hunan Province [2021 (2151)]
A novel magnetic nanocomposite MIL-101(Fe)/gamma-Fe2O3 was synthesized and characterized. It showed high efficiency in degrading oxytetracycline (OTC) pollutant and can be magnetically recovered and reused.
A novel magnetic nanocomposite MIL-101(Fe)/gamma-Fe2O3 was synthesized by hydrothermal method. The physical structure and chemical property of the as-obtained magnetic nanocomposite was characterized. The ability of MIL-101(Fe)/gamma-Fe2O3 to promote photo-assisted peroxydisulfate (PDS) activation was investigated by using oxytetracycline (OTC) as the target pollutant. The results showed that the composite with a FeCl3 center dot 6H(2)O: -Fe2O3 mass ratio of 10:1 exhibited the highest degradation efficiency (up to 91.2%). Influencing factors such as pH, catalyst dosage, PDS concentration and OTC concentration on the catalytic performance of MIL-101(Fe)-Fe2O3 were also investigated to determine the optimum conditions. More importantly, the MIL-101(Fe)/-Fe2O3 can be magnetically recovered and reused for 4 cycles. Based on radical quenching and electron spin resonance (ESR), the possible degradation mechanism of OTC in photo-assisted PDS activation (PPA) system was proposed. This research provided novel insights for the design and preparation of a new type of magnetic Fe-MOFs for envi-ronmental remediation.
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