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Water
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Applications of Advanced Oxidation Technologies in Water and Wastewater Treatment
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Applications of Advanced Oxidation Technologies in Water and Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: 20 December 2025 | Viewed by 10167

Special Issue Editors

Dr. Xuetong Yang

E-Mail Website
Guest Editor
School of Resources and Safety Engineering, University of Science and Technology Beijing, Beijing 100083, China
Interests: micropollutants; PFAS; wastewater treatment; ozonation; water quality
Special Issues, Collections and Topics in MDPI journals
Dr. Rui Zhang

E-Mail Website
Guest Editor
School of Civil Engineering, Changsha University of Science and Technology, Changsha, China
Interests: AOPs; life cycle assessment; GHG; ozonation; PFAS; micropollutants; rural wastewater
Dr. Yang Hu

E-Mail Website
Guest Editor
School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, China
Interests: wastewater treatment; heavy metal removal; adsorption materials; clean mining and smelting technology; AOPs

Special Issue Information

Dear Colleagues,

The presence of persistent (micro)pollutants, including pesticides, pharmaceuticals and personal care products (PPCPs), and per- and polyfluoroalkyl substances (PFASs) in the environment has emerged as a significant global concern. Advanced oxidation processes (AOPs), such as ozonation, Fenton, and UV/H2O2, have demonstrated promising potential as effective technologies for the removal of these persistent contaminants from water and wastewater. This Special Issue aims to compile cutting-edge research on the application and advancement of AOP technologies across various contexts, including wastewater treatment plant upgrades and water reuse.

In addition to investigating the efficiency of AOPs for micropollutant removal, this Special Issue encourages studies that evaluate the environmental sustainability of AOP technologies throughout their entire life cycle—from raw material extraction, construction, and operation to end-of-life disposal and recycling—within the framework of global carbon reduction commitments. We welcome contributions that address both the technical and environmental aspects of AOP implementation in water and wastewater treatment, aiming to provide a comprehensive overview of the field.

Dr. Xuetong Yang
Dr. Rui Zhang
Dr. Yang Hu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • persistent (micro)pollutants
  • PFAS
  • wastewater treatment
  • ozonation
  • environmental sustainability
  • water quality
  • life cycle assessment

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Published Papers (2 papers)

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Research

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21 pages, 3985 KB  
Article
Electrolyte-Driven Oxidant Generation on Ti/IrO2–SnO2–Sb2O5 Electrodes for the Efficient Removal of Alachlor and Isoproturon from Water
by Nelson Bravo-Yumi, Isabel Oller, Ana Ruiz-Delgado, Martin O. A. Pacheco-Álvarez and Juan M. Peralta-Hernández
Water 2025, 17(24), 3472; https://doi.org/10.3390/w17243472 - 7 Dec 2025
Viewed by 328
Abstract
In this study, anodic oxidation (AO) was evaluated using Ti/IrO2–SnO2–Sb2O5 electrodes in chloride, sulfate, and mixed electrolytes, along with electro-Fenton (EF) and photoelectro-Fenton (PEF) at pH 3.0, for the degradation of alachlor and isoproturon, each 50 [...] Read more.
In this study, anodic oxidation (AO) was evaluated using Ti/IrO2–SnO2–Sb2O5 electrodes in chloride, sulfate, and mixed electrolytes, along with electro-Fenton (EF) and photoelectro-Fenton (PEF) at pH 3.0, for the degradation of alachlor and isoproturon, each 50 mg L−1. Active chlorine species were monitored using UV–Vis, while the removal of both herbicides was quantified using High Performance Liquid Chromatography (HPLC), along with the reduction in Total Organic Carbon (TOC), mineralization current efficiency (MCE), and specific energy per TOC removed (ECTOC). The results show that electrolyte composition influences AO more than current density. In a chloride medium, isoproturon was eliminated within minutes, whereas alachlor required mixed electrolytes of Cl−/SO42−, allowing simultaneous combination of HClO/ClO−, ●OH, and S2O82−/SO4●−, or coupling with EF. An optimal current density of ~30 mA cm−2 limited voltage rise and radical scavenging. EF introduced measurable mineralization (15% TOC), whereas PEF achieved rapid alachlor reduction and TOC reductions of up to 76% at low Fe2+. Overall, sequential AO followed by PEF maximized mineralization per unit of energy, and the mixed electrolytes provided a controllable pathway to scale up oxidant speciation generation. Full article
(This article belongs to the Special Issue Applications of Advanced Oxidation Technologies in Water and Wastewater Treatment)
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Review

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31 pages, 1407 KB  
Review
Up-Flow Anaerobic Sludge Bed Reactors for Sustainable Wastewater Management: Challenges, Innovations, and Future Directions
by Uvin Eksith Senadheera, A. M. W. D. C. B. Abeykoon, P. M. N. Sewmini, W. M. R. B. Weerasekara, Nadeeka P. Darshani, Jasintha Jayasanka, Nuwan A. Weerasekara, Choolaka Hewawasam, K. K. Asanka Sanjeewa and Thilina U. Jayawardena
Water 2025, 17(4), 476; https://doi.org/10.3390/w17040476 - 8 Feb 2025
Cited by 6 | Viewed by 9325
Abstract
The up-flow anaerobic sludge bed (UASB) reactor is a high-efficiency system capable of carrying out anaerobic digestion with shorter hydraulic retention times than traditional anaerobic digesters. This review highlights recent advancements in UASB reactor applications and key aspects such as microbial community dynamics [...] Read more.
The up-flow anaerobic sludge bed (UASB) reactor is a high-efficiency system capable of carrying out anaerobic digestion with shorter hydraulic retention times than traditional anaerobic digesters. This review highlights recent advancements in UASB reactor applications and key aspects such as microbial community dynamics and reactor hydrodynamics that could drive future developments. More specifically, this review evaluates the working principles of UASB reactors, explores strategies to optimize reactor efficiency, and examines technological advancements aimed at overcoming temperature constraints, managing emerging pollutants and micropollutants, and addressing scum accumulation, odor emission, and nutrient recycling challenges. Furthermore, it addresses concerns about the lack of a skilled workforce and energy loss in biomethane. The UASB reactor demonstrates high potential for enhancing global wastewater management while holding the promises of enhancing circular economic objectives, promoting efficient biogas utilization, and reducing greenhouse gas emissions. Full article
(This article belongs to the Special Issue Applications of Advanced Oxidation Technologies in Water and Wastewater Treatment)
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