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New Advanced Oxidation Process and Catalyst for Water and Wastewater...
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New Advanced Oxidation Process and Catalyst for 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: closed (20 May 2022) | Viewed by 14962

Special Issue Editors

Prof. Minghao Sui

E-Mail Website
Guest Editor
Department of Municipal Engineering, College of Environmental Science and Engineering, Tongji University, Shanghai, China
Interests: water treatment; advanced oxidation processes; organic removal; disinfection; deactivation of pathogenic microorganisms; nanomaterials
Dr. Tian Li

E-Mail Website
Guest Editor
Department of Municipal Engineering, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Interests: drinking water treatment; wastewater treatment; membrane separation; membrane fabrication; membrane vibration; energy recovery device; hydrodynamics; natural organic matter
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Advanced oxidation processes (AOPs) are versatile and effective for the treatment of recalcitrant pollutants in water and wastewater. Oxidants could be activated by various catalysts to generate different kinds of reactive oxygen species, which are highly effective in degrading or removing pollutants. The new AOPs and catalysts for water and wastewater treatment have been showing impressive growth in recent years.

This Special Issue aims to consider state-of-the-art manuscripts dealing with these topics, representing cutting-edge results and innovative technologies including basic scientific research as well as practical application studies. These AOPs will cover but not be limited to Fenton, photocatalysis, ozonation, and electrochemical oxidation methods for water and wastewater treatment. Studies on the synthesis and application of highly active catalytic materials for AOPs are especially encouraged. Academic and industrial views are both welcomed.

Authors with expertise in AOPs are cordially invited to submit your manuscripts to this Special Issue. Significant original papers and critical review articles are welcomed.

Prof. Minghao Sui
Dr. Tian Li
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)
  • water treatment
  • wastewater treatment
  • toxic pollutants
  • fenton
  • photocatalysis
  • ozonation
  • electrochemical oxidation
  • catalyst

Published Papers (4 papers)

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Research

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11 pages, 2261 KiB  
Article
Degradation of Aqueous CONFIDOR® Pesticide by Simultaneous TiO2 Photocatalysis and Fe-Zeolite Catalytic Ozonation
by Muhammad Raashid, Mohsin Kazmi, Amir Ikhlaq, Tanveer Iqbal, Muhammad Sulaiman and Ahmad Shakeel
Water 2021, 13(23), 3327; https://0-doi-org.brum.beds.ac.uk/10.3390/w13233327 - 24 Nov 2021
Cited by 6 | Viewed by 1667
Abstract
Due to the importance of water for human survival and scarcity of freshwater resources, wastewater treatment has become very important recently. Some persistent pollutants, such as pesticides, are not removed even after multiple conventional wastewater treatment techniques. Advanced oxidation processes (AOPs) are one [...] Read more.
Due to the importance of water for human survival and scarcity of freshwater resources, wastewater treatment has become very important recently. Some persistent pollutants, such as pesticides, are not removed even after multiple conventional wastewater treatment techniques. Advanced oxidation processes (AOPs) are one of the novel techniques that can be used to treat these persistent compounds. Photocatalytic ozonation is a promising AOP that combines photocatalysis and ozonation for synergistic effects and faster degradation of persistent pollutants. However, usually, only a photocatalyst is used while combining photocatalysis and ozonation. In this work, both a photocatalyst and ozonation catalyst have been simultaneously used for the degradation of commercially available CONFIDOR® pesticide, a Bayer product with Imidacloprid as the active ingredient. TiO2 is employed as a photocatalyst, and Fe-coated Zeolite is employed as an ozonation catalyst. The results show that the reaction rate increases by 1.4 times if both catalysts are used as compared to the use of one photocatalyst only. Almost complete removal (>99%) of pollutant is achieved after 20 min with the simultaneous use of a catalyst when imidacloprid with an initial concentration of 100 mg/L is subjected to 250 W/m2 UV of a wavelength of 253.7 nm and 100 mg/h ozone, where it takes 30 min if only one photocatalyst is used. The paper also explores the effect of initial concentration, UV intensity, catalyst dose and catalyst reuse while also briefly discussing the kinetics and mechanism. Full article
(This article belongs to the Special Issue New Advanced Oxidation Process and Catalyst for Water and Wastewater Treatment)
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13 pages, 2143 KiB  
Article
Three-Dimensional Electrochemical Oxidation of Recalcitrant Dye Using Green Iron Microparticles
by Manisha S. Kothari, Ashraf Aly Hassan and Kosha A. Shah
Water 2021, 13(14), 1925; https://0-doi-org.brum.beds.ac.uk/10.3390/w13141925 - 12 Jul 2021
Cited by 7 | Viewed by 2517
Abstract
This study evaluated the effect of the addition of green iron microparticles (Fe-MPs) as a three-dimensional electrode on efficiency of the electrochemical oxidation process. Polyphenols present in green tea extract act as a reducing and capping agent during green synthesis of the Fe-MPs. [...] Read more.
This study evaluated the effect of the addition of green iron microparticles (Fe-MPs) as a three-dimensional electrode on efficiency of the electrochemical oxidation process. Polyphenols present in green tea extract act as a reducing and capping agent during green synthesis of the Fe-MPs. Scanning electron microscopy and energy-dispersive X-ray spectroscopy analysis indicates that the average size of particles is 100 µm, with about ~47 wt % of Fe in oxide form. The addition of Fe-MPs as a third electrode in the conventional electro-oxidation (EO) process converts it into a three-dimensional (3D) catalytic EO process to enhance the decolorization efficiency. Green synthesized Fe-MPs function as several microelectrodes in the process. Adsorption study indicated that only 12% of decolorization is due to adsorption on the Fe-MPs surface. Moreover, improvement in generation of hydroxyl radicals was validated by applying dimethyl sulfoxide as scavenger, and it was observed that generation of hydroxyl radicals decreased with the addition of DMSO. Results showed that decolorization efficiency increased in the 3D EO process with Fe-MPs by about 24% compared to the conventional 2D process without the Fe-MPs dosing, and initial pH as well as the Fe-MPs dose has a significant effect on decolorization efficiency during the 3D process. It is observed that reaction works better at highly acidic pH (2-4), and decolorization efficiency improved with higher doses of Fe-MPs. Full article
(This article belongs to the Special Issue New Advanced Oxidation Process and Catalyst for Water and Wastewater Treatment)
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Review

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22 pages, 1386 KiB  
Review
Treatment of Textile Wastewater Using Advanced Oxidation Processes—A Critical Review
by Yiqing Zhang, Kashif Shaad, Derek Vollmer and Chi Ma
Water 2021, 13(24), 3515; https://0-doi-org.brum.beds.ac.uk/10.3390/w13243515 - 09 Dec 2021
Cited by 43 | Viewed by 6759
Abstract
Textile manufacturing is a multi-stage operation process that produces significant amounts of highly toxic wastewater. Given the size of the global textile market and its environmental impact, the development of effective, economical, and easy-to handle alternative treatment technologies for textile wastewater is of [...] Read more.
Textile manufacturing is a multi-stage operation process that produces significant amounts of highly toxic wastewater. Given the size of the global textile market and its environmental impact, the development of effective, economical, and easy-to handle alternative treatment technologies for textile wastewater is of significant interest. Based on the analysis of peer-reviewed publications over the last two decades, this paper provides a comprehensive review of advanced oxidation processes (AOPs) on textile wastewater treatment, including their performances, mechanisms, advantages, disadvantages, influencing factors, and electrical energy per order (EEO) requirements. Fenton-based AOPs show the lowest median EEO value of 0.98 kWh m−3 order−1, followed by photochemical (3.20 kWh m−3 order−1), ozonation (3.34 kWh m−3 order−1), electrochemical (29.5 kWh m−3 order−1), photocatalysis (91 kWh m−3 order−1), and ultrasound (971.45 kWh m−3 order−1). The Fenton process can treat textile effluent at the lowest possible cost due to the minimal energy input and low reagent cost, while Ultrasound-based AOPs show the lowest electrical efficiency due to the high energy consumption. Further, to explore the applicability of these methods, available results from a full-scale implementation of the enhanced Fenton technology at a textile mill wastewater treatment plant (WWTP) are discussed. The WWTP operates at an estimated cost of CNY ¥1.62 m−3 (USD $0.23 m−3) with effluent meeting the China Grade I-A pollutant discharge standard for municipal WWTPs, indicating that the enhanced Fenton technology is efficient and cost-effective in industrial treatment for textile effluent. Full article
(This article belongs to the Special Issue New Advanced Oxidation Process and Catalyst for Water and Wastewater Treatment)
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21 pages, 1590 KiB  
Review
Degradation of Micropollutants and Formation of Oxidation By-Products during the Ozone/Peroxymonosulfate System: A Critical Review
by Zhao Liu, Zhiting Liang, Kai Li, Tinglin Huang, Jun Ma and Gang Wen
Water 2021, 13(21), 3126; https://0-doi-org.brum.beds.ac.uk/10.3390/w13213126 - 05 Nov 2021
Cited by 8 | Viewed by 2724
Abstract
The O3/PMS system has appeared as an effective wastewater treatment method because of the simultaneous generation of hydroxyl radicals (•OH) and sulfate radicals (SO4•−). Many research achievements have been made on the degradation of micropollutants and [...] Read more.
The O3/PMS system has appeared as an effective wastewater treatment method because of the simultaneous generation of hydroxyl radicals (•OH) and sulfate radicals (SO4•−). Many research achievements have been made on the degradation of micropollutants and the reaction mechanism of the O3/PMS system. However, an integral understanding of the O3/PMS system is lacking, which limits the development of safe and effective AOP-based water treatment schemes. Therefore, in this review, the degradation effects, toxicity changes, and reaction mechanisms of various micropollutants in the O3/PMS system are reviewed. The formation of oxidation by-products (OBPs) is an important issue that affects the practical application of O3/PMS systems. The formation mechanism and control methods of OBPs in the O3/PMS system are overviewed. In addition, the influence of different reaction conditions on the O3/PMS system are comprehensively evaluated. Finally, future research needs are proposed based on the limited understanding of O3/PMS systems in the degradation of micropollutants and formation of OBPs. Specifically, the formation rules of several kinds of OBPs during the O3/PMS system are not completely clear yet. Furthermore, pilot-scale research, the operational costs, sustainability, and general feasibility of the O3/PMS system also need to be studied. This review can offer a comprehensive assessment on the O3/PMS system to fill the knowledge gap and provide guidance for the future research and engineering applications of the O3/PMS system. Through this effort, the O3/PMS system can be better developed and turned towards practical applications. Full article
(This article belongs to the Special Issue New Advanced Oxidation Process and Catalyst for Water and Wastewater Treatment)
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