Environmentally Friendly Catalysts for Energy and Water Treatment Applications

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

Deadline for manuscript submissions: 30 September 2024 | Viewed by 361

Special Issue Editors

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Guest Editor
Department of Chemical Engineering, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), P.O. Box 644, 48080 Bilbao, Spain
Interests: water processing; catalytic ozonation; activated carbon adsorption; membrane technologies
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Institute of Renewable Energies, National Autonomous University of Mexico (IRE-NAUM), Priv. Xochicalco S/n, Col. Centro, Temixco, Morelos, CP 62580, Mexico
Interests: wastewater treatment and valorization; environmental electrochemistry; advanced oxidation processes; emerging pollutants

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Guest Editor Assistant
Coordination of Environmental Engineering, Institute of Engineering, National Autonomous University of Mexico.Circuito Escolar s/n, Ciudad Universitaria, Coyoacán, DF 04510, Mexico
Interests: water treatment; advanced oxidation process; photo-Fenton; micropollutants; recalcitrant organic matter

Special Issue Information

Dear Colleagues,

After the first successful Special Issue focused on energy and pollution control applications as catalysts, available here, we propose a second edition in the same line, now focused on water with regard to the environment, under the title: “Environmental Friendly Catalysts for Energy and Water Treatment Applications”.

Catalysts are extensively used in different technologies and play a fundamental role in the efficient generation of energy and industrial emission control. Despite the fact that catalysts have remarkable performance, they pose, in some cases, a negative environmental impact due to their massive use, which is imposed by intensive production strategies. Therefore, a reorientation in the search for new materials such as environmental friendly catalysts (EFCs) is urgently needed. Hence, the development of novel EFCs to face sustainable energy production, climate change problems, water resources conditioning and to abate industrial effluents has become a challenge in the current research fields.

A great variety of catalytic materials, which include single metals as well as mixed metals (and their oxides), are currently being used, either supported over alumina, silica, titania, ceria, zirconia, activated carbons, and zeolites or directly attached to the reactor itself, allowing their continuous use and avoiding waste emissions. Similar cases are found in Fenton catalysis, converted into EFCs through heterogeneous Fenton-like variants. Moreover, the combined use of catalysts with UV/solar irradiation or in combination with O3 and H2O2 will always be preferable to that of other oxidant agents (persulfates). Heterogeneous catalysts are also used as electrodes for energy and environmental applications. Indeed, electrochemical processes are key technologies for sustainable development. This Special Issue addresses the aforementioned topics.

Prof. Dr. José Ignacio Lombraña
Dr. Hugo Olvera Vargas
Dr. Sandra Yazmin Arzate Salgado
Guest Editors

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.


  • sustainable advanced oxidation processes (AOPs)
  • green electrocatalytic processes
  • sustainable catalytic processes
  • water resources conditioning
  • wastewater remediation
  • green energy production
  • environmentally friendly catalysts
  • multiple reused catalysts

Published Papers

This special issue is now open for submission, see below for planned papers.

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: Kinetic study of the water quality parameters during the oxidation of diclofenac by UV photocatalytic variants
Authors: N. Villota1* , B. Echevarria2, U. Duoandicoechea1, J.I. Lombraña3, A. De Luis2
Affiliation: 1 Universidad del País Vasco UPV/EHU, Dpto. de Ingeniería Química y del Medio Ambiente. Escuela de Ingeniería de Vitoria-Gasteiz. 2 Universidad del País Vasco UPV/EHU, Dpto. de Ingeniería Química y del Medio Ambiente. Escuela de Ingeniería de Bilbao. 3 Universidad del País Vasco UPV/EHU, Dpto. de Ingeniería Química. Facultad de Ciencia y Tecnología.
Abstract: Diclofenac, DCF (C14H11Cl2NO2) is a non-steroidal anti-inflammatory drug widely used, causing significant occurrence in waste effluents. DCF is especially persistent and difficult to degrade, with numerous toxic effects on aquatic fauna and humans. In 2015 DCF was included as priority pollutant (EU Directives on water policy). In this work, UV irradiation and their combination with hydrogen peroxide only or catalysed by iron salts (photo-Fenton) are analysed to find the most efficient alternative. DCF aqueous solutions were treated in a stirred 150 W UV photocatalytic reactor, with UV (300 and 570 nm), half-power, mercury lamps. According the case, 1 mM H2O2 and 0-5.0 mg/L Fe(II) catalyst, as FeSO4, was added. During reaction, DCF, pH, turbidity, UVA at 254 and 455 nm, dissolved oxygen (DO) and TOC were followed. The degradation of DCF yields a strong increase in the aromaticity because of the rise of aromatic intermediates, very stable and non-degradable by UV light. Thus, only if H2O2 is added, UV can completely degrade these aromatic colour intermediates. However, adding Fe2+ (photo-Fenton) the aromaticity remains constant due to iron complexes, that generates maximum colour and turbidity at an stoichiometric Fe(II):DCF ratio of 3. As a result of the study, it is concluded that, with UV light only, strong yellow colour is generated and maintained along the reaction, but adding H2O2, colourless appearance, low turbidity (<1 NTU) and [DO]=8.1 mg/L is obtained. Surprisingly, photo-Fenton was found inappropriate to degrade DCF.

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