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Environments
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Advanced Oxidation Applications II
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Advanced Oxidation Applications II

A special issue of Environments (ISSN 2076-3298).

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 18856

Special Issue Editors

Prof. Dr. William A. Anderson

E-Mail Website
Guest Editor
Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
Interests: air pollution control; photocatalysis; UV disinfection; biofiltration
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Mehrab Mehrvar

E-Mail Website
Guest Editor
Department of Chemical Engineering, Toronto Metropolitan University (Formerly Ryerson University), 350 Victoria Street, Toronto, ON M5B 2K3, Canada
Interests: photochemical reaction engineering, including photocatalysis, UV/hydrogen peroxide, fenton/photo-fenton, etc.; integration of advanced oxidation technologies and biological processes for wastewater treatment; effects of climate change on the quality and quantity of groundwater
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jason Zhang

E-Mail Website
Guest Editor
Department of Chemical and Biological Engineering, University of Ottwa, Ottwa, ON K1N 6N5, Canada
Interests: bioprocess engineering; environmental control

Special Issue Information

Dear Colleagues,

Advanced oxidation processes (AOPs) are an important class of destructive technologies for the treatment of organics in water, air, and on surfaces. Research has addressed a wide variety of approaches, including ozone, peroxides, persulfate, photolysis, photocatalysis, radiolysis, sonolysis, non-thermal plasma, electrochemical, and various combinations. In the field of photocatalysis, significant advances are being made in the improved use of the visible spectrum and new LED sources. Some AOPs have shown promise in the removal of micropollutants such as polyfluoroalkyl substances and personal care products in water. There remain many research questions to be addressed for the efficient and cost-effective application of AOPs in various situations. Such questions include the understanding and optimization of the chemistry, the development of improved catalysts, and the design and operation of better reaction systems.

For this Special Issue, we invite the submission of critical reviews and unpublished original research on any aspects of AOPs. The application of AOPs to specific environmental concerns in air, water, or other systems is of particular interest, including the integration of AOPs within other environmental control technologies.  

Prof. Dr. William A. Anderson
Prof. Dr. Mehrab Mehrvar
Prof. Dr. Jason 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. Environments is an international peer-reviewed open access monthly 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 1800 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

  • Photocatalysis, photoelectrocatalysis
  • Photolysis, radiolysis, sonolysis
  • Nonthermal plasma
  • Persulfate
  • Ozone, peroxide, Fenton’s chemistry
  • UV LEDs
  • Reactor design and modeling
  • Micropollutants, personal care products
  • Volatile organic compounds
  • Novel photocatalysts

Published Papers (5 papers)

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Research

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13 pages, 1631 KiB  
Article
Impact of Polarization Reversal during Photoelectrocatalytic Treatment of WWTP Effluents
by Maria Cristina Collivignarelli, Marco Carnevale Miino, Francesca Maria Caccamo, Alessandro Abbà, Massimiliano Bestetti and Silvia Franz
Environments 2023, 10(3), 38; https://doi.org/10.3390/environments10030038 - 25 Feb 2023
Cited by 1 | Viewed by 1887
Abstract
Photoelectrocatalysis (PEC) has been already proposed as a polishing treatment for wastewater treatment plants (WWTPs) effluents. In this work, the impact of polarization reversal during PEC process has been studied and evaluated on the basis of the removal of organic substance and color, [...] Read more.
Photoelectrocatalysis (PEC) has been already proposed as a polishing treatment for wastewater treatment plants (WWTPs) effluents. In this work, the impact of polarization reversal during PEC process has been studied and evaluated on the basis of the removal of organic substance and color, biodegradability of the matrix, and inactivation of the catalyst. Effluents were sampled from a full-scale WWTP and alternatively treated by electrochemical oxidation (EC), photolysis (PL), photocatalysis (PC), photoelectrocatalysis, and photoelectrocatalysis with reverse polarization (PECr). The efficiency and the kinetics of the process, in terms of removal of organic substance and color, were not affected by reverse polarization and very similar results were obtained by PEC and PECr. The biodegradability of the effluents strongly increased both by PECr (RSBR: 0.84 ± 0.07), and by PEC and PL (0.89 ± 0.11, and 0.78 ± 0.02, respectively). In the selected polarization reversal mode (100 s at −0.1 V every 500 s at 4 V, cell voltage), a similar photocurrent loss after PEC and PECr was observed, suggesting no effect on the activity of the TiO2 mesh. This study can serve as a base for future research on polarization reversal to optimize operation parameters and exploit the procedure to preventing fouling and inactivation of the catalyst. Full article
(This article belongs to the Special Issue Advanced Oxidation Applications II)
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14 pages, 1559 KiB  
Article
Water Purification and Electrochemical Oxidation: Meeting Different Targets with BDD and MMO Anodes
by Monika R. Snowdon, Shasvat Rathod, Azar Fattahi, Abrar Khan, Leslie M. Bragg, Robert Liang, Norman Zhou and Mark R. Servos
Environments 2022, 9(11), 135; https://doi.org/10.3390/environments9110135 - 27 Oct 2022
Cited by 1 | Viewed by 3264
Abstract
The complex composition of natural organic matter (NOM) can affect drinking water treatment processes, leading to perceptible and undesired taste, color and odor, and bacterial growth. Further, current treatments tackling NOM can generate carcinogenic by-products. In contrast, promising substitutes such as electrochemical methods [...] Read more.
The complex composition of natural organic matter (NOM) can affect drinking water treatment processes, leading to perceptible and undesired taste, color and odor, and bacterial growth. Further, current treatments tackling NOM can generate carcinogenic by-products. In contrast, promising substitutes such as electrochemical methods including electrooxidation (EO) have shown safer humic acid and algae degradation, but a formal comparison between EO methods has been lacking. In this study, we compared the Boron-doped diamond (BDD) electrode electrolysis performance for Suwannee River NOM degradation using mixed-metal oxide (MMO) anodes under different pH (6.5 and 8.5) representative of the high and low ranges for acidity and alkalinity in wastewater and applied two different current densities (10 and 20 mA cm−2). BDD anodes were combined with either BDD cathodes or stainless steel (SS) cathodes. To characterize NOM, we used (a) total organic compound (TOC), (b) chemical oxygen demand (COD), (c) specific ultraviolet absorbance (SUVA), and (d) specific energy consumption. We observed that NOM degradation differed upon operative parameters on these two electrodes. BDD electrodes performed better than MMO under stronger current density and higher pH and proved to be more cost-effective. BDD-SS electrodes showed the lowest energy consumption at 4.4 × 103 kWh kg COD−1. while obtaining a TOC removal of 40.2%, COD of 75.4% and SUVA of 3.4 at higher pH and current. On the contrary, MMO produced lower TOC, COD and SUVA at the lower pH. BDD electrodes can be used in surface water as a pre-treatment in combination with some other purification technologies to remove organic contaminants. Full article
(This article belongs to the Special Issue Advanced Oxidation Applications II)
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16 pages, 2625 KiB  
Article
Heterogeneous Photocatalysis of Amoxicillin under Natural Conditions and High-Intensity Light: Fate, Transformation, and Mineralogical Impacts
by Nishanthi Ellepola and Gayan Rubasinghege
Environments 2022, 9(7), 77; https://doi.org/10.3390/environments9070077 - 24 Jun 2022
Cited by 7 | Viewed by 4373
Abstract
The β-Lactam antibiotic amoxicillin is among the most widely used antibiotics in human and veterinary medicine. Consequently, amoxicillin is abundant in natural waters and can undergo diverse abiotic reactions to form degradation compounds under environmental conditions. Yet, little is known about these decay [...] Read more.
The β-Lactam antibiotic amoxicillin is among the most widely used antibiotics in human and veterinary medicine. Consequently, amoxicillin is abundant in natural waters and can undergo diverse abiotic reactions to form degradation compounds under environmental conditions. Yet, little is known about these decay pathways and mineralogical impacts on environmental amoxicillin degradation. The current study focuses on understanding the mineralogical influences of amoxicillin degradation under ecological conditions. We studied the role of anatase and kaolinite on amoxicillin degradation under irradiated and non-irradiated conditions. Anatase increases amoxicillin degradation by 4.5-fold in the presence of light compared to just being exposed to sunlight. Interestingly, anatase also showed a higher degradation rate under dark than light controls. Conversely, kaolinite diminishes the amoxicillin degradation under irradiation. The formation of degradation compounds was mineralogy-controlled, while no mineralization was observed. Further, we irradiated amoxicillin with a high-intensity light to evaluate its removal from wastewater. The formation of varying amoxicillin degradation products with high-intensity light will limit its removal from wastewater. Our study emphasizes that the mineralogical impact on amoxicillin degradation is diverse, and the role of anatase is significant. Consequently, the increased addition of manufactured titanium nanoparticles to the environment can further enhance these effects. Full article
(This article belongs to the Special Issue Advanced Oxidation Applications II)
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Review

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34 pages, 4451 KiB  
Review
Electrochemical Advanced Oxidation Processes Using Diamond Technology: A Critical Review
by Priscilla Brosler, Ana V. Girão, Rui F. Silva, João Tedim and Filipe J. Oliveira
Environments 2023, 10(2), 15; https://doi.org/10.3390/environments10020015 - 19 Jan 2023
Cited by 9 | Viewed by 4684
Abstract
Re-evaluation of conventional wastewater treatment processes is of paramount importance to improve the overall quality of our aquatic environment. Electrochemical Advanced Oxidation Processes (EAOPs) are the most promising alternative methods with application in wastewater treatment facilities since in situ electrogenerated oxidant agents degrade [...] Read more.
Re-evaluation of conventional wastewater treatment processes is of paramount importance to improve the overall quality of our aquatic environment. Electrochemical Advanced Oxidation Processes (EAOPs) are the most promising alternative methods with application in wastewater treatment facilities since in situ electrogenerated oxidant agents degrade and mineralize a wide range of water pollutants. Boron-doped diamond (BDD) technology has proven its excellency in the anodic oxidation (AO) of different pollutants. In this work, we describe the use of a systematic literature review (SLR) methodology and a bibliometric analysis tool for the assessment of a representative sample of work (hundreds of publications) concerning the synergism between AO using BDD technology and other oxidation methods. One section of the discussion relates to different techniques used to enhance the AO performance of BDD technology, namely persulfate radicals or ozone and photoelectrocatalysis, whereas the second one considers Fenton-based reactions. A standard synergism effect occurs between AO using BDD technology and the add-ons or the Fenton-based methods, resulting in the enhancement of the degradation and mineralization efficiencies. The future of EAOPs using BDD technology must include renewable energy sources to self-sustain the overall process, and further research on the subject is mandatory to enable the effective acceptance and application of such processes in wastewater remediation facilities. Full article
(This article belongs to the Special Issue Advanced Oxidation Applications II)
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32 pages, 937 KiB  
Review
Recent Advances in Dynamic Modeling and Process Control of PVA Degradation by Biological and Advanced Oxidation Processes: A Review on Trends and Advances
by Yi-Ping Lin, Ramdhane Dhib and Mehrab Mehrvar
Environments 2021, 8(11), 116; https://doi.org/10.3390/environments8110116 - 27 Oct 2021
Cited by 8 | Viewed by 3650
Abstract
Polyvinyl alcohol (PVA) is an emerging pollutant commonly found in industrial wastewater, owing to its extensive usage as an additive in the manufacturing industry. PVA’s popularity has made wastewater treatment technologies for PVA degradation a popular research topic in industrial wastewater treatment. Although [...] Read more.
Polyvinyl alcohol (PVA) is an emerging pollutant commonly found in industrial wastewater, owing to its extensive usage as an additive in the manufacturing industry. PVA’s popularity has made wastewater treatment technologies for PVA degradation a popular research topic in industrial wastewater treatment. Although many PVA degradation technologies are studied in bench-scale processes, recent advancements in process optimization and control of wastewater treatment technologies such as advanced oxidation processes (AOPs) show the feasibility of these processes by monitoring and controlling processes to meet desired regulatory standards. These wastewater treatment technologies exhibit complex reaction mechanisms leading to nonlinear and nonstationary behavior related to variability in operational conditions. Thus, black-box dynamic modeling is a promising tool for designing control schemes since dynamic modeling is more complicated in terms of first principles and reaction mechanisms. This study seeks to provide a survey of process control methods via a comprehensive review focusing on PVA degradation methods, including biological and advanced oxidation processes, along with their reaction mechanisms, control-oriented dynamic modeling (i.e., state-space, transfer function, and artificial neural network modeling), and control strategies (i.e., proportional-integral-derivative control and predictive control) associated with wastewater treatment technologies utilized for PVA degradation. Full article
(This article belongs to the Special Issue Advanced Oxidation Applications II)
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