Special Issue "Environmental Catalysis in Advanced Oxidation Processes"

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

Deadline for manuscript submissions: 31 July 2020.

Special Issue Editors

Guest Editor
Prof. Dr. Albin Pintar Website E-Mail
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
Guest Editor
Dr. Gregor Žerjav Website E-Mail
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 Issue Information

Dear colleagues,

Population growth, industry development, and an increase in agriculture are connected with the release into the environment of a large number of toxic pollutants, which cannot be degraded by natural means. In the last few decades, a group of chemical oxidative technologies classified as advanced oxidation processes (AOPs) have received significant interest as pollution removal applications. AOPs are based on generation of highly reactive and non-selective hydroxyl radicals (OH∙). There are several approaches to the generation of hydroxyl radicals, such as Fenton-, UV-, and ozone-based processes as well as heterogeneous photocatalytic processes.

We invite authors to submit original research papers focused on the synthesis and characterization of novel heterogeneous catalysts and their utilization in AOPs for the removal of complex organic and recalcitrant contaminants from the environment. Particular interest will be given to papers that explore novel reactor systems and field applications of AOPs.

Prof. Dr. Albin Pintar
Dr. Gregor Žerjav
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 papers will be 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 1600 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

  • 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

Published Papers (1 paper)

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Research

Open AccessArticle
Activated Carbon as a Cathode for Water Disinfection through the Electro-Fenton Process
Catalysts 2019, 9(7), 601; https://doi.org/10.3390/catal9070601 - 12 Jul 2019
Abstract
Unlike many other water disinfection methods, hydroxyl radicals (HO) produced by the Fenton reaction (Fe2+/H2O2) can inactivate pathogens regardless of taxonomic identity of genetic potential and do not generate halogenated disinfection by-products. Hydrogen peroxide (H [...] Read more.
Unlike many other water disinfection methods, hydroxyl radicals (HO) produced by the Fenton reaction (Fe2+/H2O2) can inactivate pathogens regardless of taxonomic identity of genetic potential and do not generate halogenated disinfection by-products. Hydrogen peroxide (H2O2) required for the process is typically electrogenerated using various carbonaceous materials as cathodes. However, high costs and necessary modifications to the cathodes still present a challenge to large-scale implementation. In this work, we use granular activated carbon (GAC) as a cathode to generate H2O2 for water disinfection through the electro-Fenton process. GAC is a low-cost amorphous carbon with abundant oxygen- and carbon-containing groups that are favored for oxygen reduction into H2O2. Results indicate that H2O2 production at the GAC cathode is higher with more GAC, lower pH, and smaller reactor volume. Through the addition of iron ions, the electrogenerated H2O2 is transformed into HO that efficiently inactivated model pathogen (Escherichia coli) under various water chemistry conditions. Chick–Watson modeling results further showed the strong lethality of produced HO from the electro-Fenton process. This inactivation coupled with high H2O2 yield, excellent reusability, and relatively low cost of GAC proves that GAC is a promising cathodic material for large-scale water disinfection. Full article
(This article belongs to the Special Issue Environmental Catalysis in Advanced Oxidation Processes)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: SnO2-CONTAINING CLINOPTILOLITE AS A COMPOSITE PHOTOCATALYST FOR DYES REMOVAL FROM WASTEWATER UNDER SOLAR LIGHT
Authors: A. Šuligoj, J. Pavlović , I. Arčon, N. Rajić, N. Novak Tušar
Abstract: Due to their adsorbent, ion exchange and catalytic properties zeolites are suitable for variaty of applications. As low cost and available, natural zeolites have attracted a great attention, especially clinoptilolite as the most abundant natural zeolite. Here we report photocatalytic activity of SnO2-containing clinoptilolite (Sn-Z) in degradation of methylene blue (MB) as a model pollutant under visible light at room temperature. For the preparation of Sn-Z, a clinoptilolite-rich zeolitic tuff (with about 80 wt. % of zeolite phase) from the Serbian deposit Slanci (near Belgrade) was used. Clinoptilolite (Z) was modified by a three step procedure which includes: 1) conversion of the Z to H-form of Z (H-Z) by an acid treatment, 2) an ion exchange using solution of SnCl2 followed by a pH adjustment to pH~10, and 3) calcination at 400 °C under air. The Sn-Z samples with 3–15 wt. % of Sn were prepared. Their crystallinity checked by a powder X-ray diffraction analysis showed that the Z was unaffected by the modification. Diffuse reflectance UV/VIS spectra of the Sn-Z samples confirmed the presence of SnO2 and X-Ray Absorption Spectroscopy analyses suggested that the SnO2 particles are not only at the surface of the clinoptilolite phase but also inside the zeolite lattice. Photocatalytic tests showed that pure SnO2 exhibits a negligible adsorption capacity towards MB (4 wt. %) in the dark, and after illumination using visible light total degradation was about 15 % indicating a low photocatalytic performance of SnO2. The H-Z itself showed higher adsorption capacity (10%) and higher total degradation of MB (30%) compared to pure SnO2. The presence of SnO2 in Sn-Z increased both adsorption capacity and photocatalytic performance. Adsorption and total degradation of MB for the Sn-Z with the highest amount of Sn (15 wt.%) was about 30 and 45 %, respectively, suggesting a synergetic activity of SnO2 and the clinoptilolite lattice. Reusability tests showed that the adsorption capacity and photocatalytic performance of the reused Sn-Z partially decreased most probably due to a partial blockage of the active sites caused by the MB degradation products.
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