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Application of Advanced Oxidation Processes (AOPs) for 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 November 2025 | Viewed by 266

Special Issue Editors


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Guest Editor
School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China
Interests: photocatalysis; electrocatalysis; advanced oxidation processes; water pollution treatment; chlorine disinfection; antibiotic resistance genes; antibiotic resistant bacteria

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Guest Editor
School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China
Interests: chlorine disinfection; antibiotic resistance genes; antibiotic resistant bacteria; wastewater treatment; photocatalysis

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Guest Editor
Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou, China
Interests: adsorption separation; heterogeneous catalysis; functional coordination polymers; porous materials; radionuclide decontamination; water pollution treatment

Special Issue Information

Dear Colleagues,

This Special Issue, titled "Application of Advanced Oxidation Processes (AOPs) for Wastewater Treatment", focuses on recent advances in AOPs and their role in the efficient degradation of recalcitrant pollutants. AOPs—such as photocatalysis, electrocatalysis, Fenton reactions, and ozonation—leverage highly reactive oxygen species (ROS) to break down emerging contaminants, including pharmaceuticals, pesticides, and industrial chemicals. The scope covers fundamental research on reaction mechanisms, the development of novel catalysts, the optimization of hybrid AOP technologies, and their scalability for industrial applications. We encourage submissions that address key challenges such as energy efficiency, cost reduction, and synergistic integration with conventional treatment methods.

Positioned within the expanding literature on sustainable water purification, this Special Issue aims to bridge the gap between laboratory-scale innovations and practical implementation. Through a compilation of high-quality studies, we seek to advance the understanding of contaminant degradation pathways and provide insights into process intensification and real-world feasibility. Contributions may explore emerging trends, ranging from nanostructured catalysts to modeling and kinetic analysis of AOPs, as well as the environmental impacts of AOP byproducts. Ultimately, this collection will serve as a valuable resource for researchers and practitioners committed to achieving cleaner water systems in alignment with global sustainability goals. 

Dr. Pengxiang Qiu
Dr. Shuai Zhang
Prof. Dr. Zhihui Zhang
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 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 (AOPs)
  • hybrid AOP technologies
  • wastewater treatment
  • photocatalysis
  • electrocatalysis
  • Fenton reactions
  • ozonation
  • reactive oxygen species (ROS)
  • emerging contaminants
  • contaminant degradation

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Published Papers (1 paper)

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Research

12 pages, 3675 KiB  
Article
Insight on the Ultrafast Water Treatment over NiFe-Layered Double Hydroxides via Electroactivation of Ferrate(VI): The Role of Spin State Regulation
by Xinyu Gai, Ningxuan Xue, Pengxiang Qiu, Yiyang Chen, Da Teng, Zhihui Zhang, Fengling Liu, Zhongyi Liu and Zhaobing Guo
Water 2025, 17(9), 1369; https://doi.org/10.3390/w17091369 - 1 May 2025
Viewed by 167
Abstract
Ferrate (Fe(VI)), an emerging green oxidant and disinfectant in water treatment, faces challenges due to its limited reaction efficiency stemming from a highly electron-deficient state. To address this, we designed NiFe-Layered Double Hydroxides (NiFe-LDHs) with different spin states to enhance electron transfer efficiency [...] Read more.
Ferrate (Fe(VI)), an emerging green oxidant and disinfectant in water treatment, faces challenges due to its limited reaction efficiency stemming from a highly electron-deficient state. To address this, we designed NiFe-Layered Double Hydroxides (NiFe-LDHs) with different spin states to enhance electron transfer efficiency in Fe(VI)-mediated advanced oxidation processes (AOPs). We hypothesized that fine-tuning the spin state of NiFe-LDHs could optimize the balance between adsorption capabilities and electronic structure regulation. Our experiments revealed that intermediate-spin NiFeLDH-1, with a magnetic moment of 0.67 μB, exhibited the best catalytic performance, achieving 100% phenol removal. The NiFeLDH-x/Fe(VI) system demonstrated a significant synergistic enhancement in degradation efficiency. In addition, NiFeLDH-1 showed excellent performance in stability and continuous flow experiments. This study unveils a novel correlation between spin polarization and catalytic efficiency, offering insights into the optimization of electrocatalysts for Fe(VI)-mediated AOPs. The findings suggest that spin state modulation is a promising strategy to enhance the electrocatalytic activity and stability of non-noble metal catalysts. Full article
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