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Trends in Catalytic Systems for Environmental Protection

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

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 7378

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Special Issue Editor

Dr. Grzegorz Boczkaj

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Guest Editor

Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, 80-233 Gdansk, Poland
Interests: cavitation based advanced oxidation processes (AOPs); cavitation based technologies
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Effective degradation of environmental pollutants remains a challenge in environmental protection technologies. New approaches are focused mainly on an increase in effectiveness and cost-effective processes aided by catalysis.

This Special Issue is dedicated to novel achievements in this field of:

Air and flue gas treatment;
Water and wastewater treatment.

Dr. Grzegorz Boczkaj
Guest Editor

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. Catalysts 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 2700 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

catalysts
AOPs
ARPs
oxidation
reduction
thermal decomposition
non-thermal catalytic decomposition
hydroxyl radicals
sulfate radicals
flue gas treatment
waste gas treatment
water treatment
wastewater treatment
nanocatalyst
sonocatalyst
Fenton
cavitation
ozonation
photocatalysis
titanium dioxide
zinc oxide
carbon nanotubes
UV

Published Papers (4 papers)

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Research

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18 pages, 4924 KiB

Open AccessArticle

Degradation of Textile Dye by Bimetallic Oxide Activated Peroxymonosulphate Process

by Hera Rashid and P. V. Nidheesh

Catalysts 2023, 13(1), 195; https://0-doi-org.brum.beds.ac.uk/10.3390/catal13010195 - 13 Jan 2023

Cited by 4 | Viewed by 1341

Abstract

The sulphate radical based advanced oxidation processes (AOPs) are highly in demand these days, owing to their numerous advantages. Herein, the Fe-Mn bimetallic oxide particle was used to activate peroxymonosulphate (PMS) for Rhodamine B (RhB) degradation. Three bimetallic catalysts were synthesized via the chemical precipitation method with different concentrations of metals; Fe-Mn (1:1), Fe-Mn (1:2) and Fe-Mn (2:1). The best performance was shown by Fe-Mn (2:1) system at optimized conditions; 96% of RhB was removed at optimized conditions. Scavenging experiments displayed the clear dominance of hydroxyl radical in pH 3, while sulphate radical was present in a large amount at pH 7 and 10. The monometallic Fe and Mn oxides were also synthesized to confirm the synergistic effect that was present in the bimetallic oxide system. The application of optimized condition in real textile wastewater was conducted, which revealed the system works efficiently at high concentrations of PMS and catalyst dosage. Full article

(This article belongs to the Special Issue Trends in Catalytic Systems for Environmental Protection)

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14 pages, 2381 KiB

Open AccessFeature PaperArticle

Tailoring the Biochar Physicochemical Properties Using a Friendly Eco-Method and Its Application on the Oxidation of the Drug Losartan through Persulfate Activation

by Alexandra A. Ioannidi, John Vakros, Zacharias Frontistis and Dionissios Mantzavinos

Catalysts 2022, 12(10), 1245; https://0-doi-org.brum.beds.ac.uk/10.3390/catal12101245 - 15 Oct 2022

Cited by 8 | Viewed by 1356

Abstract

In this study, spent malt rootlet-derived biochar was modified by a friendly eco-method using a low temperature (100 °C) and dilute acid, base, or water. The modification significantly enhanced the surface area from 100 to 308–428 m²g⁻¹ and changed the morphology and the carbon phase. In addition, the mineral’s percentage and zero-point charge were significantly affected. Among the examined materials, the acid-treated biochar exhibited higher degradation of the drug losartan in the presence of persulfate. Interestingly, the biochar acted as an adsorbent at pH 3, whereas at pH = 5.6 and 10, the apparent kinetic constant’s ratio k_oxidation/k_adsorption was 3.73 ± 0.03, demonstrating losartan oxidation. Scavenging experiments indirectly demonstrated that the role of the non-radical mechanism (singlet oxygen) was crucial; however, sulfate and hydroxyl radicals also significantly participated in the oxidation of losartan. Experiments in secondary effluent resulted in decreased efficiency in comparison to pure water; this is ascribed to the competition between the actual water matrix constituents and the target compound for the active biochar sites and reactive species. Full article

(This article belongs to the Special Issue Trends in Catalytic Systems for Environmental Protection)

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20 pages, 3596 KiB

Open AccessArticle

Tailoring Lignin-Based Spherical Particles as a Support for Lipase Immobilization

by Małgorzata Stanisz, Karolina Bachosz, Katarzyna Siwińska-Ciesielczyk, Łukasz Klapiszewski, Jakub Zdarta and Teofil Jesionowski

Catalysts 2022, 12(9), 1031; https://0-doi-org.brum.beds.ac.uk/10.3390/catal12091031 - 10 Sep 2022

Cited by 11 | Viewed by 1876

Abstract

Lignin-based spherical particles have recently gained popularity due to their characteristic and the usage of biopolymeric material. In this study, lignin-based spherical particles were prepared using choline chloride at different pH values, ranging from 2 to 10. Their dispersive, microstructural, and physicochemical properties were studied by a variety of techniques, including scanning electron microscopy, Fourier transform infrared spectroscopy, and zeta potential analysis. The best results were obtained for the particles prepared at pH 5 and 7, which had a spherical shape without a tendency to form aggregates and agglomerates. The lignin-based spherical particles were used for the immobilization of lipase, a model enzyme capable of catalyzing a wide range of transformations. It was shown that the highest relative activity of immobilized lipase was obtained after 24 h of immobilization at 30 °C and pH 7, using 100 mg of the support. Moreover, the immobilized lipase exhibited enhanced stability under harsh process conditions, and demonstrated high reusability, up to 87% after 10 cycles, depending on the support used. In the future, the described approach to enzyme immobilization based on lignin spheres may play a significant role in the catalytic synthesis of organic and fine chemicals, with high utility value. Full article

(This article belongs to the Special Issue Trends in Catalytic Systems for Environmental Protection)

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Review

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24 pages, 7852 KiB

Open AccessFeature PaperReview

Catalytical Performance of Heteroatom Doped and Undoped Carbon-Based Materials

by Jahangir Alom, Md. Saif Hasan, Md. Asaduzaman, Mohammad Taufiq Alam, Dalel Belhaj, Raja Selvaraj, Md. Ashraf Hossain, Masoumeh Zargar and Mohammad Boshir Ahmed

Catalysts 2023, 13(5), 823; https://0-doi-org.brum.beds.ac.uk/10.3390/catal13050823 - 29 Apr 2023

Cited by 4 | Viewed by 2113

Abstract

Developing cost-effective, eco-friendly, efficient, stable, and unique catalytic systems remains a crucial issue in catalysis. Due to their superior physicochemical and electrochemical properties, exceptional structural characteristics, environmental friendliness, economic productivity, minimal energy demand, and abundant supply, a significant amount of research has been devoted to the development of various doped carbon materials as efficient catalysts. In addition, carbon-based materials (CBMs) with specified doping have lately become significant members of the carbon group, showing promise for a broad range of uses (e.g., catalysis, environmental remediation, critical chemical production, and energy conversion and storage). This study will, therefore, pay attention to the function of heteroatom-based doped and undoped CBMs for catalytical applications and discuss the underlying chemistries of catalysis. According to the findings, doping CBMs may greatly improve their catalytic activity, and heteroatom-doped CBMs may be a promising option for further metal doping to attach them to an appropriate place. This paper also covers the potential applications of both doped and undoped CBMs in the future. Full article

(This article belongs to the Special Issue Trends in Catalytic Systems for Environmental Protection)

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