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Application of Advanced Oxidation Processes in Water and Wastewater Treatment
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Application of Advanced Oxidation Processes 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: closed (20 September 2023) | Viewed by 3436

Special Issue Editor

Dr. Yiqun Chen

E-Mail Website
Guest Editor
School of Civil Engineering, Wuhan University, Wuhan 430072, China
Interests: advanced oxidation process; sulfate radical; (photo)catalysis; emerging pollutants; density functional theory

Special Issue Information

Dear Colleagues,

In recent decades, advances in the chemical treatment of wastewaters have led to the development of a range of processes termed advanced oxidation processes (AOPs), which have found applications as diverse as the in situ remediation of groundwater, industrial wastewater treatment, water disinfection, etc. AOPs are highly efficient in eliminating emerging pollutants from water, such as pesticides, PPCPs, dyes, microplastics, microcystin, and toxic metals. However, more efforts are needed to further broaden the application of AOPs in water and wastewater treatment.

This Special Issue thus aims to collect the latest experimental and theoretical advancements in AOPs. The topics include, but are not limited to:

  • Fenton and Fenton-like processes;
  • Ozone-based processes;
  • Sulfate radical-based processes;
  • Photochemistry and photocatalysis;
  • Electrochemical oxidation processes;
  • Radiation processes;
  • Supercritical water oxidation.

Research articles, reviews, and short communications on relevant topics are welcomed.

Dr. Yiqun Chen
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

  • advanced oxidation process
  • water and wastewater treatment
  • free radicals
  • homogeneous/heterogeneous catalysts
  • emerging pollutants
  • oxidation by-products
  • toxicity assessment

Published Papers (2 papers)

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Research

17 pages, 4469 KiB  
Article
Enhanced Degradation of Deltamethrin in Water through Ferrous Ion Activated Sulfite: Efficiency and Mechanistic Insights
by Ying Wan, Fangze Shang, Luming Yin, Hantao Wang, Yang Ping, Jiaqi Ding, Zongping Wang and Pengchao Xie
Water 2024, 16(1), 8; https://doi.org/10.3390/w16010008 - 19 Dec 2023
Viewed by 994
Abstract
Deltamethrin’s global use as a potent insecticide against pests is well-established. However, the compound’s diverse levels of toxicity are increasingly under scrutiny, drawing significant attention to treatments of deltamethrin. Transition metal activation of sulfite is a promising technology for micropollutant degradation. In this [...] Read more.
Deltamethrin’s global use as a potent insecticide against pests is well-established. However, the compound’s diverse levels of toxicity are increasingly under scrutiny, drawing significant attention to treatments of deltamethrin. Transition metal activation of sulfite is a promising technology for micropollutant degradation. In this study, iron-activated sulfite was used for the degradation of deltamethrin. The degradation effects and influencing factors and the underlying mechanism of deltamethrin degradation in the system were investigated. The degradation of deltamethrin was effectively achieved by the Fe (III)/sulfite system. The optimal reaction conditions at laboratory scale were determined to be an initial pH of 4, a Fe (III) concentration of 100 μM, and a HSO3− concentration of 1 mM, where the degradation rate was approximately 69.5%. Dissolved oxygen was identified as an essential factor in the reaction process, with the degradation rate of deltamethrin decreasing by up to 22% under anaerobic conditions. The presence of light facilitated the degradation of deltamethrin within the reaction system, while bicarbonate and natural organic compounds were found to inhibit its degradation. Quenching experiments verified the presence of hydroxyl radicals (HO•) and sulfate radicals (SO4•−) in the reaction system, with HO• being the predominant species. This was further confirmed by EPR experiments. Additionally, density functional theory calculations indicated the propensity for bond breaking between C16 and O21 in deltamethrin molecules, and the degradation pathway was validated through GC-MS analysis of the products formed. Moreover, the Fe (III)/sulfite system demonstrated good degradation performance for deltamethrin in secondary effluent, achieving degradation rates of 46.3%. In particular, the Fe (III)/sulfite system showed minimal bromate formation, attributed to the capacity of sulfite to reduce active bromine intermediates into bromine ions. Full article
(This article belongs to the Special Issue Application of Advanced Oxidation Processes in Water and Wastewater Treatment)
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13 pages, 1952 KiB  
Article
Removal of Membrane Fouling and Control of Halogenated By-Products by a Combined Cleaning Process with Peroxides and Sodium Hypochlorite
by Jiaqi Ding, Ying Wan, Yujia Zou, Songlin Wang, Xiaolong Huang and Pengchao Xie
Water 2023, 15(13), 2498; https://doi.org/10.3390/w15132498 - 7 Jul 2023
Viewed by 1965
Abstract
Sodium hypochlorite (NaClO) solution is wildly used to remove membrane fouling-derived organic materials and restore membrane flux, which can result in the formation of halogenated by-products. To reduce the halogenated by-products, a combined cleaning process with NaClO and peroxides including hydrogen peroxide (H [...] Read more.
Sodium hypochlorite (NaClO) solution is wildly used to remove membrane fouling-derived organic materials and restore membrane flux, which can result in the formation of halogenated by-products. To reduce the halogenated by-products, a combined cleaning process with NaClO and peroxides including hydrogen peroxide (H2O2), peroxydisulfate (PDS), and peroxymonosulfate (PMS) were applied in offline mode to remove the organic fouling. It was found that all the combined cleaning processes could effectively restore the membrane flux. Compared with the process of NaClO cleaning followed by peroxide cleaning (NaClO–peroxide), fewer halogenated by-products were generated in the NaClO post-combined cleaning process (peroxide–NaClO), and the PDS–NaClO cleaning process exhibited the best performance in controlling by-products. Overall, most by-product generation showed a positive correlation with reaction time and temperature. Full article
(This article belongs to the Special Issue Application of Advanced Oxidation Processes in Water and Wastewater Treatment)
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