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New Insights into Novel Catalysts for Treatment of Pollutants in...
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New Insights into Novel Catalysts for Treatment of Pollutants in Wastewater, 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 July 2023) | Viewed by 8502

Special Issue Editors

Prof. Dr. Hao Xu

E-Mail Website
Guest Editor
Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: electrocatalytic oxidation; electrochemical scale removal; electrochemical sterilization; metal oxide electrode
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yanbiao Liu

E-Mail Website
Guest Editor
College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
Interests: environmental nanotechnology; electrochemistry; advanced oxidation technology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Water scarcity has become a worldwide problem. Wastewater treatment and reuse is an effective way to expand water resources, among which the treatment method of using catalysts as media is unique. Obviously, the catalyst is the core of these treatment methods, and its properties directly determine the treatment's effect and cost. In recent years, with the development of science and technology, various new catalysts have emerged in an endless stream, and related fields have become the focus of current scientific research. To this end, we are organizing a Special Issue in our journal focusing on the preparation, modification, and application of novel catalysts for wastewater catalytic treatment. Areas from which contributions can be made include:

  • Catalysts for electrocatalytic oxidation;
  • Catalysts for photocatalytic oxidation;
  • Catalysts for photo-electrocatalytic oxidation;
  • Catalysts for microbial electrochemical treatment;
  • Catalysts for Fenton/sub-Fenton catalytic oxidation;
  • Other catalysts that can be used for the catalytic oxidation of water treatment;
  • The application of new catalysts in wastewater treatment.

Prof. Dr. Hao Xu
Prof. Dr. Yanbiao Liu
Guest Editors

Manuscript Submission Information

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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. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • catalysts for electrocatalytic oxidation
  • catalysts for photocatalytic oxidation
  • catalysts for photo-electrocatalytic oxidation
  • catalysts for microbial electrochemical treatment
  • catalysts for Fenton/sub-Fenton catalytic oxidation
  • other catalysts that can be used for the catalytic oxidation of water treatment
  • the application of new catalysts in wastewater treatment

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Related Special Issue

Published Papers (5 papers)

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Research

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14 pages, 3929 KiB  
Article
Insights into a Removal Mechanism of Triclosan Using an Electroactivated Persulfate-Coupled Carbon Membrane System
by Junjing Li, Di Wu, Hongying Zhang, Liang Wang, Hong Wang and Zhengchun Ba
Catalysts 2023, 13(10), 1321; https://doi.org/10.3390/catal13101321 - 25 Sep 2023
Viewed by 1157
Abstract
Triclosan (TCS), a broad-spectrum bacteriostatic agent with bactericidal and disinfectant properties, is one of the emerging pollutants of great interest. The electrically activated persulfate-coupled carbon membrane system was studied in this paper. The removal of triclosan achieved 90% within 40 min. Complete degradation [...] Read more.
Triclosan (TCS), a broad-spectrum bacteriostatic agent with bactericidal and disinfectant properties, is one of the emerging pollutants of great interest. The electrically activated persulfate-coupled carbon membrane system was studied in this paper. The removal of triclosan achieved 90% within 40 min. Complete degradation can be achieved within 90 min. The electrode was characterized by scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The optimal reaction conditions were explored. The catalytic mechanism of the reaction was investigated. It was proved that hydroxyl radicals, sulfate radicals, and singlet oxygen were the main reactive oxygen species in the reaction process by the free radical quenching experiment and electron paramagnetic resonance spectrometer. The degradation path and mechanism of triclosan were investigated. Full article
(This article belongs to the Special Issue New Insights into Novel Catalysts for Treatment of Pollutants in Wastewater, 2nd Edition)
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17 pages, 4217 KiB  
Article
Sulfadiazine Elimination from Wastewater Effluents under Ozone-Based Catalysis Processes
by Ruixue Li, Yanqiong Zhang, Fengru Lu, Feng Li, Lijie Xu, Lu Gan, Chao Cui, Xuesong Li, Qiutong Jin, Wei Chu, Muting Yan and Han Gong
Catalysts 2023, 13(7), 1076; https://doi.org/10.3390/catal13071076 - 6 Jul 2023
Cited by 3 | Viewed by 1533
Abstract
The presence of antibiotic sulfadiazine (SFD) poses threats to the ecosystem and human health, and traditional wastewater treatment processes are not ideal for sulfadiazine removal. Therefore, it is urgent to develop treatment processes with high efficiency targeting sulfadiazine. This study investigated the degradation [...] Read more.
The presence of antibiotic sulfadiazine (SFD) poses threats to the ecosystem and human health, and traditional wastewater treatment processes are not ideal for sulfadiazine removal. Therefore, it is urgent to develop treatment processes with high efficiency targeting sulfadiazine. This study investigated the degradation and mineralization mechanisms of SFD by ozone-based catalysis processes including ozone/persulfate (PS) and ozone/peroxymonosulfate (PMS). The degradation, mineralization and byproducts of SFD were monitored by HPLC, TOC and LC/MS, respectively. SFD was efficiently removed by two ozone-based catalysis processes. Ozone/PMS showed high efficiency for SFD removal of 97.5% after treatment for 1 min and TOC reduction of 29.4% after treatment for 20 min from wastewater effluents. SFD degradation was affected by pH, oxidant dosage, SFD concentration and anions. In the two ozone-based catalysis processes, hydroxyl radicals (OH•) and sulfate radicals (SO4•−) contributed to the degradation of SFD. The degradation pathways of SFD under the two processes included hydroxylation, the opening of the pyrimidine ring and SO2 extrusion. The results of this study demonstrate that the two ozone-based catalysis processes have good potential for the elimination of antibiotics from water/wastewater effluents. Full article
(This article belongs to the Special Issue New Insights into Novel Catalysts for Treatment of Pollutants in Wastewater, 2nd Edition)
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11 pages, 2080 KiB  
Article
Enhanced Wet Oxidation of Excess Sludge from Pharmaceutical Wastewater Treatment by NaOH
by Yuting Zhu, Xu Zeng and Kaiyu Fang
Catalysts 2023, 13(7), 1070; https://doi.org/10.3390/catal13071070 - 4 Jul 2023
Cited by 4 | Viewed by 1562
Abstract
In the present study, enhanced wet oxidation of excess sludge from pharmaceutical wastewater by NaOH as an alkaline homogeneous catalyst was investigated. The experiments were carried out in a stainless-steel batch autoclave reactor. The highest volatile suspended solids (VSS) removal rate, 95.2%, was [...] Read more.
In the present study, enhanced wet oxidation of excess sludge from pharmaceutical wastewater by NaOH as an alkaline homogeneous catalyst was investigated. The experiments were carried out in a stainless-steel batch autoclave reactor. The highest volatile suspended solids (VSS) removal rate, 95.2%, was achieved at 260 °C within 60 min with an initial oxygen pressure of 1.0 MPa and NaOH 0.5 g·L−1. Simultaneously, the chemical oxygen demand (COD) removal rate of 57.3% was reached. The increase in volatile fatty acids (VFAs) demonstrated that the degradation of sludge was greatly accelerated by NaOH. Interestingly, the production of acetic acid, an intermediate by-product generated from the oxidation of organic compounds, increased significantly. These results illustrated that NaOH is a promising catalyst for the utilization of wet oxidation liquid of excess sludge as a carbon source for the treatment of wastewater. Full article
(This article belongs to the Special Issue New Insights into Novel Catalysts for Treatment of Pollutants in Wastewater, 2nd Edition)
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Review

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21 pages, 2868 KiB  
Review
Customized High-Value Agricultural Residue Conversion: Applications in Wastewater Treatment
by Xuefei Tan, Huiwen Wang, Xiaoyan Guo and Shih-Hsin Ho
Catalysts 2023, 13(9), 1247; https://doi.org/10.3390/catal13091247 - 28 Aug 2023
Cited by 1 | Viewed by 1053
Abstract
Wastewater treatment methods based on catalytic technology are receiving more and more attention in recent years. In order to achieve the high-value utilization of agricultural residues, the development of greener, more efficient, and economically favorable catalysts is the focus of this review. The [...] Read more.
Wastewater treatment methods based on catalytic technology are receiving more and more attention in recent years. In order to achieve the high-value utilization of agricultural residues, the development of greener, more efficient, and economically favorable catalysts is the focus of this review. The main contents include: (i) discussions around the differences in surface morphology, chemical stability, electrical conductivity, porosity, and the specific surface area of the prepared biochar according to the biochemical composition of different agricultural residues; (ii) through the above comparison, the shortlisting and selection of suitable catalysts for the preparation of agricultural residues to improve the adsorption and catalytic performance; (iii) discussions around the interaction mode and catalytic mechanism between the surface properties of biochar and pollutants; (iv) based upon future needs, discussions around making full use of the distribution of the pyrolysis products of agricultural residue, and designing biochar-based catalysts to achieve the efficient degradation of pollutants in wastewater. The review aims to provide a waste disposal alternative for the alleviation of environmental pollution and the promotion of green chemistry as well as sustainable development. Full article
(This article belongs to the Special Issue New Insights into Novel Catalysts for Treatment of Pollutants in Wastewater, 2nd Edition)
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19 pages, 2125 KiB  
Review
Progress in the Preparation of Metal Oxide Electrodes for the Electrochemical Treatment of Organic Wastewater: A Short Review
by Xiaosheng Jing, Xinyu Wang, Xiaoliang Li, Dongqi Wang, Hao Xu and Wei Yan
Catalysts 2023, 13(7), 1096; https://doi.org/10.3390/catal13071096 - 13 Jul 2023
Cited by 6 | Viewed by 2637
Abstract
The direct discharge of untreated organic wastewater poses significant threats to the environment and to human health. To address these threats, electrocatalytic oxidation technology has emerged as a key solution for organic wastewater treatment. Building on research conducted over the past three years, [...] Read more.
The direct discharge of untreated organic wastewater poses significant threats to the environment and to human health. To address these threats, electrocatalytic oxidation technology has emerged as a key solution for organic wastewater treatment. Building on research conducted over the past three years, this review highlights the considerable advantages of electrocatalytic oxidation technology in the context of organic wastewater treatment, with a particular emphasis on the application of metal oxide electrodes. The review also provides a summary of the primary methods used in the preparation of such electrodes. Subsequently, the applications of both single-metal-oxide electrodes and metal oxide composite electrodes in organic wastewater treatment are summarized. Finally, we discuss the future development of metal oxide electrodes. Full article
(This article belongs to the Special Issue New Insights into Novel Catalysts for Treatment of Pollutants in Wastewater, 2nd Edition)
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