Recent Catalytic Progresses for Environmental Remediation and Pollutant Degradation

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

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 2805

Special Issue Editors


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Guest Editor
School of Environment, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
Interests: advanced oxidation technology; water reuse; heavy metal and new pollutant treatment

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Guest Editor
Université Lille, Cité Scientifique, Bâtiment C3, 59650 Villeneuve d'Ascq Cedex, France
Interests: heterogeneous catalyst; mixed oxide; porous support; supported catalyst; redox catalysis; environment; biomass
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Special Issue Information

Dear Colleagues,

Global industrialization and urbanization have amplified environmental pollution, posing risks to ecological and human health. As the demand for environmental remediation and the degradation of pollutants in various aquatic systems intensifies, the development of advanced oxidation processes and environmentally friendly catalytic materials has become crucial. These strategies predominantly focus on contaminant removal via oxidation, often necessitating the significant influx of oxidants and the generation of reactive species, such as •OH, SO4, reactive chlorine species, reactive phosphate species, and so on.

Contemporary research encourages the deployment of innovative catalytic processes to mitigate health concerns and curtail the operational expenses associated with chemical additives during aquatic remediation endeavors. Elements, such as inorganic ions, natural organic materials, trace metallic cations, nanoparticles, microplastics, and other inherent environmental substances, can be harnessed to initiate catalytic reactions, targeting the degradation of pollutants, particularly the emerging contaminants. Furthermore, functional materials with expansive surface areas and a good catalytic ability can active oxidants like H2O2, O3, persulfate, peracetic acid, and permanganate with low dosage, and even utilize O2 to decompose pollutants.

This Special Issue aims to cover the reaction mechanisms and the roles of reactive species in novel catalytic processes and materials, with a special focus on the degradation of emergent contaminants and environmental remediation in reused, waste-, surface, and groundwater.

Dr. Ying Huang
Prof. Dr. Sébastien Royer
Guest Editors

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Keywords

  • advanced oxidation process
  • emerging contaminants
  • environmental catalysis
  • radical reactions
  • environmental remediation

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Published Papers (3 papers)

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Research

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17 pages, 9575 KiB  
Article
Activation of Peroxymonosulfate by Fe, O Co-Embedded Biochar for the Degradation of Tetracycline: Performance and Mechanisms
by Yufang Tao, Shenshen Sun, Yunzhen Hu, Shijie Gong, Shiyun Bao, Huihui Li, Xinyi Zhang, Zhe Yuan and Xiaogang Wu
Catalysts 2024, 14(9), 556; https://doi.org/10.3390/catal14090556 - 24 Aug 2024
Viewed by 531
Abstract
In recent years, pollution stemming from pharmaceuticals has garnered widespread global concern, which exacerbates the ecological risk to both surface and groundwater. In the current study, Fe and O co-embedded biochar (Fe-O-BC) was synthesized through a one-step pyrolysis procedure with corncob serving as [...] Read more.
In recent years, pollution stemming from pharmaceuticals has garnered widespread global concern, which exacerbates the ecological risk to both surface and groundwater. In the current study, Fe and O co-embedded biochar (Fe-O-BC) was synthesized through a one-step pyrolysis procedure with corncob serving as the feedstock. The fabricated Fe-O-BC catalysts were characterized by various techniques and were employed for the activation of peroxymonosulfate (PMS) to degrade tetracycline (TC). TC was rapidly degraded within 40 min, with a degradation rate of 0.1225 min−1, which was much higher than those for O-BC/PMS (0.0228 min−1) and Fe-BC/PMS (0.0271 min−1) under the same conditions. The effects of PMS dosage, Fe-O-BC dose, initial pH value and coexisting anions for TC degradation were investigated. Finally, the mechanism of TC oxidation in the catalytic system was implored through experiments of determining the active sites and radical scavenging experiments. The C-O-Fe bond in the catalyst was confirmed to be the dominant active sites accelerating TC degradation. Free diffused HO, the surface-bound HO and SO4•− and O2•−participated in the reaction and absorbed SO4•−, and HO predominantly contributed to TC degradation. This study provides an efficient and green alternative for pharmaceutical wastewater treatment by Fe and O co-doped catalyst-induced heterogeneous process. Full article
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22 pages, 9063 KiB  
Article
Remediation of Polycyclic Aromatic Hydrocarbon-Contaminated Soil by Using Activated Persulfate with Carbonylated Activated Carbon Supported Nanoscale Zero-Valent Iron
by Changzhao Chen, Zhe Yuan, Shenshen Sun, Jiacai Xie, Kunfeng Zhang, Yuanzheng Zhai, Rui Zuo, Erping Bi, Yufang Tao and Quanwei Song
Catalysts 2024, 14(5), 311; https://doi.org/10.3390/catal14050311 - 8 May 2024
Cited by 2 | Viewed by 1246
Abstract
Soil contamination by polycyclic aromatic hydrocarbons (PAHs) has been an environmental issue worldwide, which aggravates the ecological risks faced by animals, plants, and humans. In this work, the composites of nanoscale zero-valent iron supported on carbonylated activated carbon (nZVI-CAC) were prepared and applied [...] Read more.
Soil contamination by polycyclic aromatic hydrocarbons (PAHs) has been an environmental issue worldwide, which aggravates the ecological risks faced by animals, plants, and humans. In this work, the composites of nanoscale zero-valent iron supported on carbonylated activated carbon (nZVI-CAC) were prepared and applied to activate persulfate (PS) for the degradation of PAHs in contaminated soil. The prepared nZVI-CAC catalyst was characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). It was found that the PS/nZVI-CAC system was superior for phenanthrene (PHE) oxidation than other processes using different oxidants (PS/nZVI-CAC > PMS/nZVI-CAC > H2O2/nZVI-CAC) and it was also efficient for the degradation of other six PAHs with different structures and molar weights. Under optimal conditions, the lowest and highest degradation efficiencies for the selected PAHs were 60.8% and 90.7%, respectively. Active SO4−• and HO were found to be generated on the surface of the catalysts, and SO4−• was dominant for PHE oxidation through quenching experiments. The results demonstrated that the heterogeneous process using activated PS with nZVI-CAC was effective for PAH degradation, which could provide a theoretical basis for the remediation of PAH-polluted soil. Full article
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Review

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13 pages, 2635 KiB  
Review
TiO2-Supported Catalysts in Low-Temperature Selective Reduction of NOx with NH3: A Review of Recent Progress
by Xue Bian, Jing Wang, Yuting Bai, Yanping Li, Wenyuan Wu and Yuming Yang
Catalysts 2024, 14(9), 558; https://doi.org/10.3390/catal14090558 - 25 Aug 2024
Viewed by 659
Abstract
Selective catalytic reduction (SCR) stands out as a pivotal method for curbing NOx emissions from flue gas. The support, crucially, for SCR efficacy, loads and interacts with the active components within the catalyst. The catalysts could be amplified by the denitration performance [...] Read more.
Selective catalytic reduction (SCR) stands out as a pivotal method for curbing NOx emissions from flue gas. The support, crucially, for SCR efficacy, loads and interacts with the active components within the catalyst. The catalysts could be amplified by the denitration performance of the catalyst by enhancements in support pore structure, acidity, and mechanical robustness. These improvements ensure efficient interaction between the support and active materials, thereby optimizing the structure and property of the catalysts. TiO2 is the most commonly used support of the NH3-SCR catalyst. The catalyst with TiO2 support has poor thermal stability and a narrow temperature range, which can be improved. This paper reviews the research progress on the effects of various aspects of TiO2 support on the NH3-SCR catalyst’s performance, focusing on the TiO2 crystal type, TiO2 crystal surface, different TiO2 structures, TiO2 support preparation methods, and the effects of TiO2-X composite support on the NH3-SCR catalyst’s performance. The reaction mechanism, denitrification performance, and anti-SO2/H2O poisoning performance and mechanism of TiO2 support with different characteristics were described. At the same time, the development trend of the NH3-SCR catalyst using TiO2 as the support is prospected. It is hoped that this work can provide optimization ideas for SCR catalyst research. Full article
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