Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Environmental Catalysis".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 4583

Special Issue Editors


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Guest Editor
Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
Interests: heterogeneous catalysis; environmental catalysis; reaction kinetics and mechanisms; synthesis and characterization of catalysts; process development and intensification
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E-Mail Website
Guest Editor
Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia
Interests: photocatalysis; heterogeneous catalysis; advanced oxidation processes; visible-light-driven photocatalysts; photocatalysis for water purification; photocatalysts based on TiO2; preparation and characterization of catalysts and materials; water treatment by advanced oxidation processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

After the first successful Special Issue focused on “Environmental Catalysis in Advanced Oxidation Processes” available here, we propose the second edition, titled “Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition”.

Population growth, industrial development, and agricultural increases are linked to the release into the environment of a variety of toxic pollutants that cannot be naturally degraded. In recent decades, a group of chemical oxidation technologies called advanced oxidation processes (AOPs) have attracted considerable interest in pollutant removal applications. AOPs are based on generating highly reactive and nonselective hydroxyl radicals (OH∙), for which there are several approaches, e.g., Fenton, UV and ozone-based processes, as well as heterogeneous photocatalytic processes.

We invite authors to submit original work addressing the synthesis and characterization of novel heterogeneous catalysts and their use in AOPs for removing complex organic and recalcitrant pollutants from the environment. Of particular interest are papers that investigate novel reactor systems and practical applications of AOPs.

Prof. Dr. Albin Pintar
Dr. Gregor Žerjav
Guest Editors

Manuscript Submission Information

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Keywords

  • advanced oxidation processes
  • heterogeneous catalysis/photocatalysis
  • water/air treatment
  • organic pollutants
  • novel catalysts for catalytic/photocatalytic AOPs
  • in situ and operando catalyst characterization
  • reaction mechanisms and kinetics
  • pilot-scale studies and field applications

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Published Papers (4 papers)

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Research

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15 pages, 4289 KiB  
Article
Modified Gasification-Slag-Driven Persulfate Activation for Highly Efficient Degradation of Acetaminophen: N/O Active Site Regulation and Nonradical Oxidation
by Wenhao Si, Fei Qi, Kangjun Wang, Qiang Wang, Zequan Zeng, Yuting Niu and Zhanggen Huang
Catalysts 2023, 13(12), 1512; https://doi.org/10.3390/catal13121512 - 15 Dec 2023
Viewed by 891
Abstract
With the development of coal chemical technology, a large amount of gasification slag and wastewater are produced through coal gasification. Efficient gasification slag utilization and wastewater treatment have attracted much attention. In this study, gasification slag was modified and used as a low-cost [...] Read more.
With the development of coal chemical technology, a large amount of gasification slag and wastewater are produced through coal gasification. Efficient gasification slag utilization and wastewater treatment have attracted much attention. In this study, gasification slag was modified and used as a low-cost and efficient catalyst to activate persulfate for acetaminophen degradation. Via the analysis of high-resolution X-ray photoelectron spectroscopy, the surfaces of nitric acid and calcined modified gasification slag retained a considerable number of carbonyl and graphite N functional groups. These proved to be effective active sites for the activation of persulfate. X-ray diffraction analysis revealed that the gasification slag was composed of carbon and SiO2. The evaluation of catalytic activity and application of density functional theory proved that the interaction between carbonyl and graphitic nitrogen significantly affected the catalyst activity. When the ratio of graphitic nitrogen to carbonyl was 1:3, the adsorption and activation of persulfate were significantly enhanced. The results of the quenching experiments also confirmed that the non-free radical pathway is the main pathway to activate persulfate using the gasification slag. This study provides a new approach to industrial waste utilization in wastewater treatment. Full article
(This article belongs to the Special Issue Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition)
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11 pages, 3261 KiB  
Article
The Catalytic Wet Oxidation of Excess Activated Sludge from a Coal Chemical Wastewater Treatment Process
by Zhongquan Wang, Shulin Qin, Weicheng Zheng, Xiaodan Lou, Xu Zeng and Taihang Wu
Catalysts 2023, 13(10), 1352; https://doi.org/10.3390/catal13101352 - 09 Oct 2023
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Abstract
An improved catalytic wet oxidation method for the disposal of excess activated sludge from a coal chemical wastewater treatment process by using the prepared Cu-Ce/γ-Al2O3 catalyst was reported. The effects of catalyst dosage, reaction temperature and time, and initial oxygen [...] Read more.
An improved catalytic wet oxidation method for the disposal of excess activated sludge from a coal chemical wastewater treatment process by using the prepared Cu-Ce/γ-Al2O3 catalyst was reported. The effects of catalyst dosage, reaction temperature and time, and initial oxygen pressure on the degradation of the sludge were investigated. The maximum removal rate of volatile suspended solids, 93.2%, was achieved at 260 °C for 60 min with the catalyst 7.0 g·L−1 and initial oxygen pressure 1.0 MPa. The removal rate of chemical oxygen demand was 78.3% under the same conditions. The production of volatile fatty acids, including mainly acetic acid, propanoic acid, and isobutyric acid, increased with the increasing temperature. These acids have the potential to be carbon sources for the biological treatment of wastewater. Scanning electron microscopy images showed that the sludge became a loose porous structure, which is beneficial for dewatering performance. The results of an energy dispersive spectroscopy analysis illustrated that the carbon element in the sludge substantially migrated from solid to liquid phases. Therefore, these results demonstrated that the proposed catalytic wet oxidation method offers a promising pathway for the disposal and utilization of excess activated sludge from the coal chemical wastewater treatment process. Full article
(This article belongs to the Special Issue Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition)
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18 pages, 4422 KiB  
Article
Assessing the Efficacy of A Mo2C/Peroxydisulfate System for Tertiary Wastewater Treatment: A Study of Losartan Degradation, E. coli Inactivation, and Synergistic Effects
by Alexandra A. Ioannidi, Maria Vlachodimitropoulou, Zacharias Frontistis, Athanasia Petala, Eleni Koutra, Michael Kornaros and Dionissios Mantzavinos
Catalysts 2023, 13(9), 1285; https://doi.org/10.3390/catal13091285 - 08 Sep 2023
Cited by 2 | Viewed by 799
Abstract
This work examines the use of pristine Mo2C as an intriguing sodium persulfate (SPS) activator for the degradation of the drug losartan (LOS). Using 500 mg/L Mo2C and 250 mg/L SPS, 500 μg/L LOS was degraded in less than [...] Read more.
This work examines the use of pristine Mo2C as an intriguing sodium persulfate (SPS) activator for the degradation of the drug losartan (LOS). Using 500 mg/L Mo2C and 250 mg/L SPS, 500 μg/L LOS was degraded in less than 45 min. LOS decomposition was enhanced in acidic pH, while the apparent kinetic constant decreased with higher LOS concentrations. According to experiments conducted in the presence of scavengers of reactive species, sulfate radicals, hydroxyl radicals, and singlet oxygen participated in LOS oxidation, with the latter being the predominant reactive species. The presence of competitors such as bicarbonate and organic matter reduced the observed efficiency in actual matrices, while, interestingly, the addition of chloride accelerated the degradation rate. The catalyst showed remarkable stability, with complete LOS removal being retained after five sequential experiments. The system was examined for simultaneous LOS decomposition and elimination of Escherichia coli. The presence of E. coli retarded LOS destruction, resulting in only 30% removal after 3 h, while the system was capable of reducing E. coli concentration by 1.23 log. However, in the presence of simulated solar irradiation, E. coli was reduced by almost 4 log and LOS was completely degraded in 45 min, revealing a significant synergistic effect of the solar/Mo2C/SPS system. Full article
(This article belongs to the Special Issue Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition)
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Review

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47 pages, 6925 KiB  
Review
Review on Recent Advances in the Removal of Organic Drugs by Advanced Oxidation Processes
by Muhammad Umair, Tayyaba Kanwal, Vittorio Loddo, Leonardo Palmisano and Marianna Bellardita
Catalysts 2023, 13(11), 1440; https://doi.org/10.3390/catal13111440 - 14 Nov 2023
Viewed by 1337
Abstract
In recent years, due to the high consumption of drugs both for human needs and for their growing use, especially as regards antibiotics, in the diet of livestock, water pollution has reached very high levels and attracted widespread attention. Drugs have a stable [...] Read more.
In recent years, due to the high consumption of drugs both for human needs and for their growing use, especially as regards antibiotics, in the diet of livestock, water pollution has reached very high levels and attracted widespread attention. Drugs have a stable chemical structure and are recalcitrant to many treatments, especially biological ones. Among the methods that have shown high efficiency are advanced oxidation processes (AOPs) which are, among other things, inexpensive and eco-friendly. AOPs are based on the production of reactive oxygen species (ROS) able to degrade organic pollutants in wastewater. The main problem related to the degradation of drugs is their partial oxidation to compounds that are often more harmful than their precursors. In this review, which is not intended to be exhaustive, we provide an overview of recent advances in the removal of organic drugs via advanced oxidation processes (AOPs). The salient points of each process, highlighting advantages and disadvantages, have been summarized. In particular, the use of AOPs such as UV, ozone, Fenton-based AOPs and heterogeneous photocatalysis in the removal of some of the most common drugs (tetracycline, ibuprofen, oxytetracycline, lincomycin) has been reported. Full article
(This article belongs to the Special Issue Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition)
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