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Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism

1
College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
2
College of Environmental Science and Engineering, Yangzhou University, Yangzhou 225127, China
3
Guangdong Provincial Key Laboratory of Eco-Circular Agriculture, South China Agricultural University, Guangzhou 510642, China
*
Authors to whom correspondence should be addressed.
Water 2020, 12(12), 3583; https://doi.org/10.3390/w12123583
Received: 7 November 2020 / Revised: 5 December 2020 / Accepted: 15 December 2020 / Published: 21 December 2020
(This article belongs to the Special Issue Remediation of Contaminated or Degraded Soil and Water Resources)
In this study, a magnetic copper ferrite/montmorillonite-k10 nanocomposite (CuFe2O4/MMT-k10) was successfully fabricated by a simple sol-gel combustion method and was characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), the Brunner–Emmett–Teller (BET) method, vibrating sample magnetometer (VSM), and X-ray photoelectron spectroscopy (XPS). For levofloxacin (LVF) degradation, CuFe2O4/MMT-k10 was utilized to activate persulfate (PS). Due to the relative high adsorption capacity of CuFe2O4/MMT-k10, the adsorption feature was considered an enhancement of LVF degradation. In addition, the response surface methodology (RSM) model was established with the parameters of pH, temperature, PS dosage, and CuFe2O4/MMT-k10 dosage as the independent variables to obtain the optimal response for LVF degradation. In cycle experiments, we identified the good stability and reusability of CuFe2O4/MMT-k10. We proposed a potential mechanism of CuFe2O4/MMT-k10 activating PS through free radical quenching tests and XPS analysis. These results reveal that CuFe2O4/MMT-k10 nanocomposite could activate the persulfate, which is an efficient technique for LVF degradation in water. View Full-Text
Keywords: magnetic; copper ferrite; montmorillonite-k10; levofloxacin; persulfate; response surface methodology magnetic; copper ferrite; montmorillonite-k10; levofloxacin; persulfate; response surface methodology
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MDPI and ACS Style

Yang, J.; Huang, M.; Wang, S.; Mao, X.; Hu, Y.; Chen, X. Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism. Water 2020, 12, 3583. https://doi.org/10.3390/w12123583

AMA Style

Yang J, Huang M, Wang S, Mao X, Hu Y, Chen X. Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism. Water. 2020; 12(12):3583. https://doi.org/10.3390/w12123583

Chicago/Turabian Style

Yang, Junying; Huang, Minye; Wang, Shengsen; Mao, Xiaoyun; Hu, Yueming; Chen, Xian. 2020. "Efficient Removal of Levofloxacin by Activated Persulfate with Magnetic CuFe2O4/MMT-k10 Nanocomposite: Characterization, Response Surface Methodology, and Degradation Mechanism" Water 12, no. 12: 3583. https://doi.org/10.3390/w12123583

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