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Wastewater Treatment Based on AOPs, ARPs, and AORPs
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School of Biology and Environment, Nanjing Forestry University, Nanjing, China
College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Dr. Yizhen Zhang
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, China
Dr. Yusi Tian
School of Environmental Science and Engineering, Shanxi Institute of Science and Technology, Xi’an, China
Environmental Systems Engineering, Faculty of Engineering and Applied Science, University of Regina, Regina, SK, Canada
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Wastewater Treatment Based on AOPs, ARPs, and AORPs

Abstract submission deadline
31 January 2026
Manuscript submission deadline
31 March 2026
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2535

Topic Information

Dear Colleagues,

The pollution of organic wastewaters, such as dyes, phenols, and pharmaceuticals, is a serious environmental problem, and advanced oxidation processes (AOPs) are potentially sound techniques to degrade such contaminants based on the generation of reactive species that are powerful oxidants and can effectively degrade almost all stable compounds. In addition, AOPs have great advantages for the treatment of trace harmful chemicals such as environmental hormones, enabling the complete mineralization or decomposition of most organic materials. Furthermore, AOPs have good application prospects. AOPs can be divided into photocatalytic oxidation, catalytic oxidation, acoustic chemical oxidation, ozone oxidation, electrochemical oxidation, Fenton oxidation, etc.

However, recent advances have highlighted other advanced treatment processes (ATPs) as possible alternatives, such as advanced reduction processes (ARPs) and advanced oxidation–reduction processes (AORPs). They may remove contaminants that are not readily treatable by AOPs or offer better performance than the former. This Topic will collect some articles about the most common or promising ATPs for the removal of contaminants from water and wastewater and for their application.

Dr. Yuwei Pan
Dr. Ying Zhang
Dr. Yizhen Zhang
Dr. Yusi Tian
Dr. Jinkai Xue
Topic Editors

Keywords

  • wastewater treatment
  • water treatment
  • AOPs
  • ARPs
  • AORPs
  • environmental health

Participating Journals

Journal Name Impact Factor CiteScore Launched Year First Decision (median) APC
Catalysts
catalysts 		4.0 7.6 2011 16.6 Days CHF 2200 Submit
Clean Technologies
cleantechnol 		4.7 8.3 2019 33.7 Days CHF 1600 Submit
Processes
processes 		2.8 5.5 2013 16 Days CHF 2400 Submit
Sustainability
sustainability 		3.3 7.7 2009 19.3 Days CHF 2400 Submit
Water
water 		3.0 6.0 2009 19.1 Days CHF 2600 Submit
Molecules
molecules 		4.6 8.6 1996 16.1 Days CHF 2700 Submit
Gels
gels 		5.3 7.6 2015 12.5 Days CHF 2100 Submit

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Published Papers (2 papers)

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26 pages, 4438 KB  
Review
Carbon Nitride Gels: Synthesis, Modification, and Water Decontamination Applications
by Qinglan Tang, Zhen Zhang, Yuwei Pan, Michael K. H. Leung, Yizhen Zhang and Keda Chen
Gels 2025, 11(9), 685; https://doi.org/10.3390/gels11090685 - 27 Aug 2025
Viewed by 259
Abstract
Graphitic carbon nitride (g-C3N4)-based materials hold significant promise for environmental remediation, particularly water purification, owing to their unique electronic structure, metal-free composition, and robust chemical stability. However, powdered g-C3N4 faces challenges such as particle aggregation, poor [...] Read more.
Graphitic carbon nitride (g-C3N4)-based materials hold significant promise for environmental remediation, particularly water purification, owing to their unique electronic structure, metal-free composition, and robust chemical stability. However, powdered g-C3N4 faces challenges such as particle aggregation, poor recyclability, and limited exposure of active sites. Structuring g-C3N4 into hydrogels or aerogels—three-dimensional porous networks offering high surface area, rapid mass transport, and tunable porosity—represents a transformative solution. This review comprehensively examines recent advances in g-C3N4-based gels, covering synthesis strategies such as crosslinking (physical/chemical), in situ polymerization, and the sol–gel and template method. Modification approaches including chemical composition and structural engineering are systematically categorized to elucidate their roles in optimizing catalytic activity, stability, and multifunctionality. Special emphasis is placed on environmental applications, including the removal of emerging contaminants and heavy metal ions, as well as solar-driven interfacial evaporation for desalination. Throughout, the critical interplay between gel structure/composition and performance is evaluated to establish design principles for next-generation materials. Finally, this review identifies current challenges regarding scalable synthesis, long-term stability, in-depth mechanistic understanding, and performance in complex real wastewater matrices. This work aims to provide valuable insights and guidance for advancing g-C3N4-based hydrogel and aerogel technologies in environmental applications. Full article
(This article belongs to the Topic Wastewater Treatment Based on AOPs, ARPs, and AORPs)
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21 pages, 14871 KB  
Article
Electrochemical Co-Degradation of Acetaminophen and Bisphenol A in Aqueous Solutions: Degradation Competition and Pathways
by Kuo-Lin Huang, Jui-Chiung Hung and Yi-Ming Kuo
Processes 2024, 12(12), 2641; https://doi.org/10.3390/pr12122641 - 23 Nov 2024
Viewed by 1470
Abstract
This study investigated the degradation competition and pathways of electrochemical co-degradation of two emerging environmental contaminants, polar acetaminophen (AP) and (moderately) non-polar bisphenol A (BPA), on a boron-doped diamond (BDD) electrode in aqueous solutions. The results showed that both compounds mainly relied on [...] Read more.
This study investigated the degradation competition and pathways of electrochemical co-degradation of two emerging environmental contaminants, polar acetaminophen (AP) and (moderately) non-polar bisphenol A (BPA), on a boron-doped diamond (BDD) electrode in aqueous solutions. The results showed that both compounds mainly relied on hydroxyl radicals (•OH) to trigger indirect oxidation for their electrochemical degradation, although AP also underwent direct oxidation during electrolysis. The effect of increasing current density on the increases in degradation performance was almost the same for AP and BPA. However, BPA exhibited a better performance in mono-degradation than AP, while the opposite tendency was observed for their co-degradation. Their degradation efficiencies were better in 1 M Na2SO4 solution than in a real water matrix. Both UV-vis and excitation–emission matrix (EEM) fluorescence analyses demonstrated that all the aromatic rings of AP and BPA were opened after 30 min of electrolysis at 0.5 A cm−2 in 1 M Na2SO4 solution. Regardless of the small difference in intermediate species, the pathways of electrochemical AP+BPA co-degradation were similar to those of their mono-degradation combination. A double exponential decay model is proposed to simulate the formation and degradation rate constants of benzoquinone (an intermediate). Full article
(This article belongs to the Topic Wastewater Treatment Based on AOPs, ARPs, and AORPs)
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