Activation of peroxymonosulfate in an electrochemical filter by MnFe2O4-rGO electro-assisted catalytic membrane for the degradation of oxytetracycline. Issue 1 (February 2022)

• Record Type: Journal Article
• Authors: Wang, Xinyu; Wang, Haonan; Li, Fengxiang; Hu, Xiaomin; Xie, Zhitao; Hua, Tao
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 1(2022)
• Publication Date: 2022-02
• Subjects: SMZ sulfamethoxazole -- MB methylene blue -- OTC oxytetracycline -- PMS peroxymonosulfate -- MnFe2O4-rGO MnFe2O4-reduced graphene oxide nanocomposite -- MnFe2O4-G MnFe2O4-100rGO -- GO graphene oxide -- rGO reduced graphene oxide -- CV cyclic voltammetry -- EIS electrochemical impedance spectroscopy -- SEM scanning electron microscope -- TEM transmission electron microscope -- FT-IR Fourier transform infrared -- EDS energy-dispersive X-ray spectroscopy -- XRD X-ray diffraction -- XPS X-ray photoelectron spectroscopy -- DMSO dimethyl sulfoxide -- BQ benzoquinone -- L-H L-Histidine; Electrochemical-filtration -- Singlet oxygen -- Oxytetracycline -- MnFe2O4-rGO -- Cathode catalytic membrane; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2021.107008
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: In this work, an effective electro-assisted catalytic activation system using a cathode catalytic membrane was proposed for use in an electrochemical filter. The electrocatalytic membrane strengthened the production of 1 O2, which plays an important role in removing organic pollutants. Under the conditions of a PMS dosage of 300 mg/L, voltage of 3 V, and flow rate of 8 mL/min, the oxytetracycline (OTC) degradation efficiency can reach 88.3%. In addition, the degradation efficiency loss of MnFe2 O4 -reduced graphene oxide nanocomposite electrochemical membranes was only 13.9% after repeated use five times at a high flow rate, and the metal leaching rate remained in a very low range. The OTC degradation mechanism in the electrochemical filter was analyzed, and a clear explanation was provided for the removal pathway. The results indicate that the electro-assisted catalytic activation system has substantial potential for practical applications. Graphical Abstract: ga1 Highlights: Electrochemical filtration was used for the removal of organic pollutions. MnFe2 O4 -reduced graphene oxide nanocomposite membrane was prepared. Singlet oxygen played a major role in the system. The synergistic activation system was efficient, universal, and stable.