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Marriage of membrane filtration and sulfate radical-advanced oxidation processes (SR-AOPs) for water purification: Current developments, challenges and prospects

CHEMICAL ENGINEERING JOURNAL (2022)

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Journal

CHEMICAL ENGINEERING JOURNAL
Volume 433, Issue -, Pages -

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133802

Keywords

Membrane; Peroxymonosulfate; Peroxydisulfate; Filtration; Wastewater treatment; Membrane fouling

Categories

Engineering, Environmental Engineering, Chemical

Funding

  1. National Natural Science Foundation of China [52070133]
  2. Chengdu Science and Technology Project [2021-YF05-00892-SN]

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The integration of membrane filtration (MF) and sulfate radical-advanced oxidation processes (SR-AOPs) has gained extensive attention in environmental remediation for its simultaneous degradation and filtration of pollutants in wastewater. This review comprehensively summarizes the classification, preparation methods, and properties of different types of membrane-based materials and filtration devices, as well as the mechanisms, technical challenges, and prospects of the collaborative mixing process.
Integration of membrane filtration (MF) and sulfate radical-advanced oxidation processes (SR-AOPs) has progressively attracted extensive attention for environmental remediation because of simultaneous degradation and filtration of pollutants in wastewater. Current development of the integration of MF and SR-AOPs can be divided into three main categories: (1) peroxymonosulfate (PMS)/peroxydisulfate (PDS) are activated by membrane materials to achieve the purpose of synergistic oxidation-filtration process; (2) removal of contaminants was achieved by filtering through the membrane, and then adding PMS/PDS to regenerate the membrane; (3) the membrane can be directly used as an oxidant-catalyst/water contactor to promote SR-AOPs. On this basis, this review comprehensively summarizes the classification, preparation methods and properties of different types of membrane-based materials and filtration devices. In addition, the antifouling effect and self-purification regeneration ability of different SR-AOPs systems on the membrane are highlighted. Moreover, the main mechanisms including the analysis of active sites, the generation of free radicals, and the theoretical calculations in integration of MF and SR-AOPs are defragmented and discussed. Finally, the technical challenges of coupling technology in wastewater treatment are discussed, and the development and application prospects of the collaborative mixing process are prospected.

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