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Advanced Oxidation Technologies for the Removal of Refractory Organic Contaminants...
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Advanced Oxidation Technologies for the Removal of Refractory Organic Contaminants in Water and Wastewater

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

Deadline for manuscript submissions: closed (24 April 2024) | Viewed by 2399

Special Issue Editors

Dr. Wentao Li

E-Mail Website
Guest Editor
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
Interests: UV disinfection; advanced oxidation; nanofiltration; computational fluid dynamics; water treatment; wastewater purification
Dr. Junfeng Lian

E-Mail Website
Guest Editor
Jiangxi Provincial Key Laboratory of Water Ecological Conservation at Headwater Regions, Jiangxi University of Science and Technology, 1958 Ke-jia Road, Ganzhou 341000, China
Interests: UV-based advanced oxidation; disinfection by-products; microplastics; water treatment; wastewater purification

Special Issue Information

Dear Colleagues,

Refractory organic contaminants, arising from daily life, agricultural activity, and industrial production, have become a global concern due to their persistence in water and toxicity to most living creatures. The efficient removal of these contaminants is thus highly demanded. Advanced oxidation technologies that generate reactive radicals comprise a promising barrier that can block contaminants from entering natural waters and the drinking water system. Nonetheless, these technologies are usually energy-intensive compared to traditional water treatment processes. Innovations and progress are being made continuously to improve the contaminant removal efficiency. This Special Issue is devoted to covering the recent advances in this respect. The new results and findings facilitate the sustainable control of the refractory organic contaminants in water and wastewater.

We will publish studies focused on either classical or novel advanced oxidation technologies (e.g., UV/H2O2, O3-MNBs), and the target contaminant will trace organic contaminants in water sources or recalcitrant organics from industrial wastewater. Both original research and review articles are welcome.

Dr. Wentao Li
Dr. Junfeng Lian
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

  • UV-based advanced oxidation process
  • ozone-based advanced oxidation process
  • Fenton/Fenton-like process
  • trace organic contaminants
  • recalcitrant organics
  • kinetics and mechanism
  • toxicity evaluation
  • energy cost
  • reactor performance

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Published Papers (2 papers)

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Research

16 pages, 3148 KiB  
Article
Degradation of Azo Dye Orange II Using BiOI/HKUST-1 Activated Persulfate under Visible Light Irradiation
by Shumeng Zhang, Rui Wang, Xianxiong Cheng, Junfeng Lian, Xin Liu and Jiahua Tang
Water 2024, 16(13), 1805; https://doi.org/10.3390/w16131805 - 26 Jun 2024
Viewed by 1155
Abstract
Type I semiconductor heterojunction BiOI/HKUST-1 composites were prepared through a solvothermal method, with optimisation of the molar ratio and solvothermal reaction temperature. Comprehensive characterisation was conducted to assess the physical and chemical properties of the prepared materials. These composites were then evaluated for [...] Read more.
Type I semiconductor heterojunction BiOI/HKUST-1 composites were prepared through a solvothermal method, with optimisation of the molar ratio and solvothermal reaction temperature. Comprehensive characterisation was conducted to assess the physical and chemical properties of the prepared materials. These composites were then evaluated for their ability to activate persulfate (PMS) and degrade high concentrations of azo dye orange II (AO7) under visible light conditions. The influence of various parameters, including catalyst dosage, PMS dosage, and initial AO7 concentration, were investigated. The AO7 degradation followed a pseudo-second order kinetic, and under visible light irradiation for 60 min, a degradation efficiency of 94.9% was achieved using a BiOI/HKUST-1 dosage of 0.2 g/L, a PMS concentration of 0.5 mmol/L, and an AO7 concentration of 200 mg/L. The degradation process involved a synergistic action of various active species, with O2−, 1O2, and h+ playing a pivotal role. Both BiOI and HKUST-1 could be excited by visible light, leading to the generation of photogenerated electron-hole pairs (e−-h+); BiOI can efficiently scavenge the generated e−, enhancing the separation rate of e−-h+ and subsequently improving the degradation efficiency of AO7. These findings highlight the excellent photocatalytic properties of BiOI/HKUST-1, making it a promising candidate for catalysing PMS to enhance the degradation of azo dyes in environmental waters. Full article
(This article belongs to the Special Issue Advanced Oxidation Technologies for the Removal of Refractory Organic Contaminants in Water and Wastewater)
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13 pages, 1921 KiB  
Article
Degradation of Atrazine by Flow-Through UV-Based Advanced Oxidation Processes: Roles of Light Source and Chlorine Addition
by Suona Zhang, Tao Han, Li You, Jing Zhong, Huimin Zhang, Xiaojun Hu and Wentao Li
Water 2024, 16(12), 1697; https://doi.org/10.3390/w16121697 - 14 Jun 2024
Cited by 1 | Viewed by 919
Abstract
Understanding the degradation kinetics and mechanisms of trace organic contaminants (TrOCs) by UV-based advanced oxidation processes (UV-AOPs) are pivotal in realizing their efficient application in water treatment. However, the relevant knowledge in practical flow-through reactors remains a void, compared with that of commonly [...] Read more.
Understanding the degradation kinetics and mechanisms of trace organic contaminants (TrOCs) by UV-based advanced oxidation processes (UV-AOPs) are pivotal in realizing their efficient application in water treatment. However, the relevant knowledge in practical flow-through reactors remains a void, compared with that of commonly used batch reactors. To fill the knowledge gaps, the current work investigated the degradation of atrazine (ATZ) in flow-through UV-AOP systems with different light sources and chlorine additions. The results showed that UV/Cl2 in the reactors (with a diameter of 50 mm) was not very efficient in ATZ degradation while the pseudo-first order degradation rate constant was elevated by over 2.7 times with vacuum UV (VUV)/UV. In contrast to observations in the batch reactors, the addition of chlorine to the flow-through VUV/UV system unexpectedly decreased the rate constant by about 39%. The analysis of the relative contributions of different degradation pathways revealed that the inhibitory effect of the chlorine addition arose from the transformation of HO• to reactive chlorine species (e.g., ClO•) which had low reaction rate constants with ATZ. The baffle implementation promoted the ATZ degradation by 12–58%, mainly due to an enhanced mixing that facilitated the radical oxidation. The energy costs of the UV-AOPs in ATZ removal ranged within 0.40–1.11 kWh m−3 order−1. The findings of this work are helpful in guiding efficient VUV/UV and VUV/UV/Cl2 processes in drinking water treatment. Full article
(This article belongs to the Special Issue Advanced Oxidation Technologies for the Removal of Refractory Organic Contaminants in Water and Wastewater)
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