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Open AccessArticle

Electrochemical/Peroxymonosulfate/NrGO-MnFe2O4 for Advanced Treatment of Landfill Leachate Nanofiltration Concentrate

1
School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
2
School of Ecology and Environment, Zhengzhou University, Zhengzhou 450001, China
*
Author to whom correspondence should be addressed.
Academic Editor: Giorgio Mannina
Water 2021, 13(4), 413; https://doi.org/10.3390/w13040413
Received: 15 December 2020 / Revised: 31 January 2021 / Accepted: 1 February 2021 / Published: 4 February 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
A simple one-pot method was used to successfully embed manganese ferrite (MnFe2O4) nanoparticles on the nitrogen-doped reduced graphene oxide matrix (NrGO), which was used to activate peroxymonosulfate to treat the landfill leachate nanofiltration concentration (LLNC) with electrochemical enhancement. NrGO-MnFe2O4 and rGO-MnFe2O4 were characterized by various means. This indicates that nitrogen-doped could induce more graphene oxide (GO) spall and reduction to produce more active centers, and was favorable for uniformly loading MnFe2O4 particles. The comparison between electrochemical/peroxymonosulfate/NrGO-MnFe2O4 (EC/PMS/NrGO-MnFe2O4) system and different catalytic systems shows that electrochemical reaction, NrGO and MnFe2O4 can produce synergies, and the chemical oxygen demand (COD) removal rate of LLNC can reach 72.89% under the optimal conditions. The three-dimensional (3D-EEM) fluorescence spectrum shows that the system has a strong treatment effect on the macromolecules with intense fluorescence emission in LLNC, such as humic acid, and degrades into substances with weak or no fluorescence characteristics. Gas chromatography-mass spectrometry (GC-MS) indicates that the complex structure of refractory organic compounds can be simplified, while the simple small molecular organic compounds can be directly mineralized. The mechanism of catalytic degradation of the system was preliminarily discussed by the free radical quenching experiment. Therefore, the EC/PMS/NrGO-MnFe2O4 system has significant application potential in the treatment of refractory wastewater. View Full-Text
Keywords: NrGO-MnFe2O4; peroxymonosulfate; electrochemical; landfill leachate nanofiltration concentration NrGO-MnFe2O4; peroxymonosulfate; electrochemical; landfill leachate nanofiltration concentration
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MDPI and ACS Style

Wang, J.; He, Z.; Wang, Y.; Lu, M. Electrochemical/Peroxymonosulfate/NrGO-MnFe2O4 for Advanced Treatment of Landfill Leachate Nanofiltration Concentrate. Water 2021, 13, 413. https://doi.org/10.3390/w13040413

AMA Style

Wang J, He Z, Wang Y, Lu M. Electrochemical/Peroxymonosulfate/NrGO-MnFe2O4 for Advanced Treatment of Landfill Leachate Nanofiltration Concentrate. Water. 2021; 13(4):413. https://doi.org/10.3390/w13040413

Chicago/Turabian Style

Wang, Jiaqi; He, Zhengguang; Wang, Yuzhong; Lu, Manjing. 2021. "Electrochemical/Peroxymonosulfate/NrGO-MnFe2O4 for Advanced Treatment of Landfill Leachate Nanofiltration Concentrate" Water 13, no. 4: 413. https://doi.org/10.3390/w13040413

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