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Interfacial Adsorption and Oxidation-Based Water Purification Technology

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

Deadline for manuscript submissions: 20 September 2025 | Viewed by 2827

Special Issue Editors


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Guest Editor
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
Interests: drinking water treatment; advanced oxidation technology; disinfection; water toxicity; organic pollutants decontamination
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin, China
Interests: advanced oxidation processes; pre-treatment process; enhanced coagulation; functional material; water purification

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Guest Editor Assistant
College of Environment & Safety Engineering, Fuzhou University, Fuzhou, China
Interests: advanced oxidation processes; water treatment; ozonation; water purification; interfacial mechanism; functional materials

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Guest Editor Assistant
College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, China
Interests: advanced oxidation processes; water treatment; water chemistry; water purification; surface functionalization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The overall focus, scope, and purpose of this Special Issue is as follows:

Overall focus: catalytic elimination of environmental pollutants—including small-molecular organic acids and other macromolecular organics present in water environment.

Scope: A comprehensive understanding of advanced oxidation decontamination techniques, especially for industrial applications. All aspects of the design, preparation, characterization, and regeneration of various green and novel catalysts, which can be derived from biomass, transition metals, etc. In particular, the conversion of environmental waste into environmentally friendly catalysts for renewable use is encouraged. Scientific insight into the degradation paths of pollutants and the application of interfacial catalytic oxidation processes in solving environmental challenges are also encouraged.

Purpose: Use a variety of practical technologies to solve existing environmental pollution problems. The combination of adsorption separation and oxidation technology for the efficient removal of macromolecular organic micropollutants is highly regarded.

Contextual Relevance: Discuss how the topics covered align with current trends and gaps in environmental catalysis research. Highlight the significance of addressing pollutants from both stationary and mobile sources, as well as advancements in catalyst development for clean energy production.

Literature Review: Summarize key findings from relevant studies in catalytic pollution control, clean energy production, photocatalytic processes, and biomass transformation. Emphasize areas where new catalytic routes or technologies can make a significant impact.

Future Directions: Suggest future research directions based on gaps identified in the literature and emerging challenges in environmental catalysis. This could include exploring new catalyst materials, improving catalytic efficiency, or integrating catalytic processes into broader environmental management strategies.

Dr. Pengwei Yan
Prof. Dr. Zhonglin Chen
Guest Editors

Dr. Yabin Li
Dr. Yizhen Cheng
Guest Editor Assistants

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 100 words) can be sent to the Editorial Office for announcement on this website.

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

  • advanced oxidation processes
  • water treatment
  • water chemistry
  • water purification
  • surface functionalization

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Published Papers (3 papers)

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Research

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16 pages, 42048 KiB  
Article
Enhanced Groundwater Aeration with a Geometrically Constrained Vortex
by Roman Klymenko, Leticia Cerutti, Marcos B. A. Colombo, Elmar C. Fuchs, Jakob Woisetschläger, Wilfred F. L. M. Hoeben and Luewton L. F. Agostinho
Water 2025, 17(4), 506; https://doi.org/10.3390/w17040506 - 11 Feb 2025
Cited by 1 | Viewed by 675
Abstract
This paper presents an experimental study comparing the aeration efficiencies of hyperbolic funnels and a cylindrical reactor, focusing on key parameters such as dissolved oxygen (DO) concentration, standard oxygen transfer rate (SOTR20), and standard aeration efficiency (SAE). The unique geometry of [...] Read more.
This paper presents an experimental study comparing the aeration efficiencies of hyperbolic funnels and a cylindrical reactor, focusing on key parameters such as dissolved oxygen (DO) concentration, standard oxygen transfer rate (SOTR20), and standard aeration efficiency (SAE). The unique geometry of the hyperbolic funnel induces a helical water flow, which expands the gas–liquid interfacial area within the water vortex, thereby enhancing aeration efficiency via vortex dynamics. The cylindrical reactor forms larger water “umbrellas” at its outlet due to increased internal water pressure, specifically optimizing the umbrella-driven aeration. The study also evaluated a three-funnel cascade system, demonstrating that a single funnel operating in the umbrella regime is more aeration-efficient than multiple funnels in cascade, as additional funnels reduce the SAE, due to the increased pumping height required. Further experiments using 3D-printed funnels investigated the influence of outlet diameter on flow rates and aeration efficiency. Our results indicated that larger outlet diameters allowed higher flow rates and umbrella sizes, yielding a superior aeration efficiency and outperforming all other reactors tested. The study also highlights the importance of funnel positioning relative to the water reservoir, which significantly influences both the SOTR20 and SAE. For the reactor investigated, a height of 75 cm was optimal for balancing both parameters. Whereas the SOTR20 values of the lab reactors were lower than those of commercial systems, due to the lower flow rates, the SAE values were notably high, surpassing those of mechanical aeration systems. Our findings suggest that hyperbolic funnels are a promising and highly efficient alternative for wastewater and groundwater aeration, with a strong potential for scalability. Full article
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13 pages, 3121 KiB  
Article
Effect of the Fe2O3/SBA-15 Surface on Inducing Ozone Decomposition and Mass Transfer in Water
by Lei Yuan, Lele Fang, Jizhou Zhang, Pengwei Yan and Zhonglin Chen
Water 2024, 16(18), 2590; https://doi.org/10.3390/w16182590 - 12 Sep 2024
Viewed by 751
Abstract
Catalytic ozonation with metal oxides is of interest for advanced water treatment technology. The amount of active oxygen-containing radicals produced is a primary objective of this process. Fe2O3 is a widely used catalyst because of its high performance. In this [...] Read more.
Catalytic ozonation with metal oxides is of interest for advanced water treatment technology. The amount of active oxygen-containing radicals produced is a primary objective of this process. Fe2O3 is a widely used catalyst because of its high performance. In this study, Fe2O3/SBA-15 was synthesized and characterized. The results revealed that Fe2O3/SBA-15 was a nano-/mesoporous material with high-order hexagonal array structures and exhibited greater catalytic performance than Fe2O3 in ozonation processes. To investigate the role of the Fe2O3/SBA-15 surface in O3 decomposition, the kinetic constant was measured, and the interfacial reactions were discussed. Compared with Fe2O3, Fe2O3/SBA-15 significantly increased the formation of hydroxyl radicals (•OH) and the efficient utilization of O3 in the catalytic O3 decomposition process. The SBA-15 support decreased the O3 self-decomposition rate during catalytic ozonation with Fe2O3/SBA-15, which resulted in increased formation of •OH via the reaction between O3 and Fe2O3. From a practical point of view, Fe2O3/SBA-15 is an efficient green ozonation catalyst for water treatment. Full article
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Review

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17 pages, 608 KiB  
Review
Recent Advances in Heavy Metal Adsorption via Organically Modified Mesoporous Silica: A Review
by Zeinab Ezzeddine, Isabelle Batonneau-Gener, Ghassan Ghssein and Yannick Pouilloux
Water 2025, 17(5), 669; https://doi.org/10.3390/w17050669 - 25 Feb 2025
Viewed by 695
Abstract
Despite the significant advancements in wastewater treatment technologies, the field still lacks a comprehensive synthesis of recent developments in heavy metal removal using functionalized mesoporous silica materials. Adsorption has emerged as a preferred method due to its versatility, efficiency, and cost-effectiveness. Mesoporous silica [...] Read more.
Despite the significant advancements in wastewater treatment technologies, the field still lacks a comprehensive synthesis of recent developments in heavy metal removal using functionalized mesoporous silica materials. Adsorption has emerged as a preferred method due to its versatility, efficiency, and cost-effectiveness. Mesoporous silica stands out as a leading adsorbent due to its porous structure and surface modification potential, yet there remains a critical need to systematically analyze and evaluate recent innovations in this rapidly evolving field. This review addresses this knowledge gap by consolidating and critically analyzing the recent literature on functionalized mesoporous silica for heavy metal ion removal from wastewater. Through a detailed examination of the maximum adsorption efficiencies of organically modified mesoporous silica-based materials for various metal ions, with particular emphasis on recent trends in removing heavy metal ions, this work provides a crucial foundation for understanding current capabilities and limitations. Additionally, by identifying patterns in synthesis methods, surface functionalization strategies, and performance metrics across different studies, this review offers valuable insights into optimization opportunities and unexplored research directions. The systematic compilation and analysis of these data will serve as an essential resource for researchers working to advance the design and application of modified mesoporous silica for diverse water pollutant removal applications. Full article
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