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Water Treatment Technology for Emerging Contaminants, 2nd Edition
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Water Treatment Technology for Emerging Contaminants, 2nd Edition

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

Deadline for manuscript submissions: 30 July 2025 | Viewed by 4374

Special Issue Editor

Prof. Dr. Wenjie Zhang

E-Mail Website
Guest Editor
College of Environmental Science & Engineering, Guilin University of Technology, Guilin, China
Interests: emerging pollutants; removal strategies; potable water sources; membrane filtration; environment detection; biological treatment; degradation mechanism
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will provide an authoritative platform for both academic and engineering communities to exchange and share their latest research findings and application cases related to the treatment of emerging pollutants in water. At the same time, we will promote cooperation and exchange between experts and scholars in different fields, as well as promote the innovation and development of water treatment technology for emerging pollutants. This Special Issue will focus on water treatment technologies for different types of emerging pollutants.

In this Special Issue, we welcome research papers, review papers, and case studies related to emerging pollutants, including, but not limited to, the following topics:

  • Emerging pollutants;
  • Microplastics;
  • Drug residues;
  • Organic pollutants;
  • Heavy metals and inorganic pollutants.

For different categories of emerging pollutants, this Special Issue will showcase and introduce relevant water treatment technologies and methods. Through research on these technologies and methods, people can better understand and solve the challenges posed by emerging pollutants to the water environment. In addition, this Special Issue will provide practical solutions to solve the problem of emerging pollutants in the water environment through the research and application of water treatment technology for emerging pollutants. Through the review and collation of the existing literature, this Special Issue will provide a clear basis for the positioning of emerging pollutant water treatment technologies.

Prof. Dr. Wenjie Zhang
Guest Editor

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

  • emerging pollutants
  • water treatment technologies
  • innovation and development
  • water environment
  • research and applications

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Further information on MDPI's Special Issue policies can be found here.

Related Special Issue

Published Papers (3 papers)

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Research

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22 pages, 2615 KiB  
Article
Degradation of 1,4-Dioxane by Au/TiO2 Janus Nanoparticles Under Ultraviolet Light: Experiments and Modeling
by Yangyuan Ji, Matthew J. Tao, Lamar O. Mair, Amit Kumar Singh, Yuhang Fang, Sathish Rajendran, Thomas E. Beechem, David M. Warsinger and Jeffrey L. Moran
Water 2025, 17(11), 1708; https://doi.org/10.3390/w17111708 - 4 Jun 2025
Viewed by 500
Abstract
Advanced oxidation processes (AOPs) show significant promise to degrade recalcitrant water contaminants, such as 1,4-dioxane, but slow degradation kinetics limit the energy efficiency of this technology. We realized substantial enhancements in the degradation of 1,4-dioxane (a suspected carcinogen) using gold-coated titanium dioxide (Au/TiO [...] Read more.
Advanced oxidation processes (AOPs) show significant promise to degrade recalcitrant water contaminants, such as 1,4-dioxane, but slow degradation kinetics limit the energy efficiency of this technology. We realized substantial enhancements in the degradation of 1,4-dioxane (a suspected carcinogen) using gold-coated titanium dioxide (Au/TiO2) Janus nanoparticles (JNPs) irradiated with above-bandgap ultraviolet (UV) light (peak wavelength, 254 nm). To explain this result, we combined experimental measurements quantifying 1,4-dioxane degradation at varying UV wavelengths with finite-element simulations that provided explanatory insight into the light–matter interactions at play. The enhanced photocatalytic activity at the optimal condition (254 nm light, high intensity, Au/TiO2) resulted from a larger quantity of photogenerated holes in the TiO2 capable of reacting with water to form hydroxyl radicals that degrade 1,4-dioxane. This increased production of holes resulted from two sources: (1) more viable electron–hole pairs were created under 254 nm light owing to increased light absorption by the TiO2 that was localized near the surface; (2) the metal sequestered photogenerated electrons from the TiO2, which prevented electron–hole pairs from recombining, leaving more holes available to react with water. Our results motivate the exploration of different metal coatings (especially non-precious metals) and suggest a path toward broader implementation of TiO2-based photocatalytic AOPs, which can effectively remove many water pollutants that survive conventional treatment techniques. Full article
(This article belongs to the Special Issue Water Treatment Technology for Emerging Contaminants, 2nd Edition)
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Review

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13 pages, 213 KiB  
Review
Challenges in Designing Electrochemical Disinfection Systems for Reducing Microbial Contamination in Drinking Water Distribution Networks
by Sergio Ferro
Water 2025, 17(5), 754; https://doi.org/10.3390/w17050754 - 4 Mar 2025
Cited by 1 | Viewed by 1131
Abstract
Electrochemical disinfection systems are gaining attention as potential solutions for reducing microbial contamination in drinking water distribution networks. While numerous recent studies suggest that these systems are easy to implement, real-world application reveals significant challenges. Many published works suffer from fundamental flaws, including [...] Read more.
Electrochemical disinfection systems are gaining attention as potential solutions for reducing microbial contamination in drinking water distribution networks. While numerous recent studies suggest that these systems are easy to implement, real-world application reveals significant challenges. Many published works suffer from fundamental flaws, including inappropriate material selection, unrealistic operating conditions, and non-compliance with regulatory standards. This review critically examines studies published over the past 24 months, highlighting key issues that limit practical applicability. It discusses common pitfalls, such as the use of unstable or toxic electrode materials and the failure to provide residual disinfectant effects. Additionally, the review outlines essential characteristics for effective electrochemical disinfection systems, emphasizing compliance with health regulations, scalability to real-world conditions, and long-term operational stability. By identifying these gaps, this review article aims to guide future research toward more viable, safe, and sustainable electrochemical disinfection solutions for drinking water treatment. Full article
(This article belongs to the Special Issue Water Treatment Technology for Emerging Contaminants, 2nd Edition)
33 pages, 3232 KiB  
Review
Efficiency of Microalgae Employment in Nutrient Removal (Nitrogen and Phosphorous) from Municipal Wastewater
by Marcel Daniel Popa, Ira-Adeline Simionov, Stefan Mihai Petrea, Puiu-Lucian Georgescu, George Adrian Ifrim and Catalina Iticescu
Water 2025, 17(2), 260; https://doi.org/10.3390/w17020260 - 17 Jan 2025
Cited by 4 | Viewed by 2391
Abstract
Growing population, industrialisation, and demand for resources put pressure on the delicate balance of the planet’s ecosystems. From alternative sources of energy, healthier foods, cleaner water, and an overall more sustainable economy, the integration of microalgae in various industries, that otherwise are based [...] Read more.
Growing population, industrialisation, and demand for resources put pressure on the delicate balance of the planet’s ecosystems. From alternative sources of energy, healthier foods, cleaner water, and an overall more sustainable economy, the integration of microalgae in various industries, that otherwise are based on practices that hurt the environment, could be a successful solution. To reach that goal, further research is required on the complex relationship between microalgae and growth parameters (temperature, light intensity and spectrum, nutrient distribution, inhibiting factors, and so on). The scientific community successfully used microalgae to produce healthier foods, pigments, biofuel, animal fodder, methods for sequestering heavy metals, toxic compounds from water, and much more. In this review article, we approach the use of microalgae in municipal wastewater treatment, mainly for using nitrogen and phosphorous present in water as nutrients. Data were collected from articles published in the last 7 years (2018–2024). The results show that microalgae are very efficient at using N and P compounds from wastewater, as well as carbon, converting them in high-value substances (proteins, lipids, carbohydrates, etc.) with further applications in multiple industries. Full article
(This article belongs to the Special Issue Water Treatment Technology for Emerging Contaminants, 2nd Edition)
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