Innovative Materials and Technologies for Pollutants Removal and Green Energy Production and Storage

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Environmental and Green Processes".

Deadline for manuscript submissions: 30 November 2025 | Viewed by 283

Special Issue Editors


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Guest Editor
"Cristofor Simionescu" Faculty of Chemical Engineering and Environmental Protection, "Gheorghe Asachi" Technical University of Iasi, 700050 Iasi, Romania
Interests: environmental engineering and biotechnology; process modelling and optimization; clean technologies; space and terrestrial applications

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Guest Editor
Department of Environmental Engineering and Management, Faculty of Chemical Engineering and Environmental Protection, Gheorghe Asachi Technical University of Iasi, 700050 Iasi, Romania
Interests: applied electrochemistry; remediation of environmental components (water, air and soil); recovery and recycling of valuable components from wastes; process modelling and optimization; energy storage; innovative materials and technological processes; circular economy

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Guest Editor
Chemical Engineering Department, Faculty of Chemical Sciences and Technologies, University of Castilla-La Mancha, 13004 Ciudad Real, Spain
Interests: electrochemical environmental technology; (solar) microbial fuel cells; (bio)electrocatalysis; green energy production

Special Issue Information

Dear Colleagues,

The environmental quality is one of the premises for ensuring the life quality and sustainable development of the society. Therefore, preserving the quality of the environment should belong to every inhabitant of the planet, although unfortunately an increasingly significant alteration is observed in most urban agglomerations, due to the exponential development of the anthropogenic activities at all socio-economic levels, including those related to energy production. Thus, under current conditions, where pollution was already established, the elimination of the pollutants using appropriate customized technologies is a primordial task for the remediation of the affected environmental components. To meet the pollution prevention desiderates, new solutions for green energy production are envisaged, along with the development of new materials for the environmental quality remediation by pollutant removal in a sustainable manner. In the light of the above mentioned aspects, two fundamental directions are outlined, which support the sustainable development of the society and respectively constitute the topics of this special issue. These include, but are not limited to, technological processes (for pollutants removal from different environmental streams or matrices—gaseous/liquid/solid etc.), methods for synthesis of emerging materials (such as biochar, aerogels or other composites based on graphene or carbon nanotubes etc.), preparation of advanced energy production and storage systems (supercapacitors, fuel cells or photovoltaics etc.), strategies for their integration and assessment, modeling and optimization of the involved processes etc., with reference to the terrestrial and/or space applications, while focusing on environmental performance enhancement. Both original research articles and reviews are welcome.

Dr. Gabriela Soreanu
Prof. Dr. Igor Cretescu
Prof. Dr. Manuel Andrés Rodrigo
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. Processes 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 2400 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

  • air treatment
  • soil remediation
  • wastewater treatment
  • green energy
  • bio/electrochemical processes
  • life support systems
  • chemical and environmental process engineering

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Published Papers (1 paper)

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Research

14 pages, 1115 KiB  
Article
Development of an Innovative and Sustainable Technological Process for Biogas Purification Through the Reuse of Autoclaved Aerated Concrete Waste
by Eric Dumont, Noé Kautzmann and Annabelle Couvert
Processes 2025, 13(6), 1767; https://doi.org/10.3390/pr13061767 - 3 Jun 2025
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Abstract
This study demonstrated the effectiveness of using autoclaved aerated concrete AAC waste as a low-cost filtering material for removing hydrogen sulfide (H2S) from gas streams. A long-term experiment (89 days) was conducted in a packed bed reactor to purify synthetic biogas [...] Read more.
This study demonstrated the effectiveness of using autoclaved aerated concrete AAC waste as a low-cost filtering material for removing hydrogen sulfide (H2S) from gas streams. A long-term experiment (89 days) was conducted in a packed bed reactor to purify synthetic biogas composed of N2, CO2, H2S, and O2. Optimal H2S removal efficiencies, reaching up to 100%, were achieved under highly acidic conditions (pH ≈ 1–3) and low oxygen concentrations (<1%). In the presence of oxygen, calcium oxides in the AAC waste react with H2S to form gypsum (CaSO4 2H2O). The simultaneous removal of both oxygen and H2S by AAC waste, following an approximate 2:1 molar ratio, may be particularly beneficial for biogas streams containing unwanted traces of oxygen. The transformation and lifespan of AAC waste were monitored through sulfur accumulation in the material and pressure drop measurements, which indicated structural changes in the AAC waste. At the end of its lifespan, the AAC waste exhibited an H2S removal capacity of 185 gH2S kgAAC−1. This innovative and sustainable process not only provides a cost-effective and environmentally sound solution for the simultaneous removal of H2S and O2 from biogas, but also promotes waste valorization and aligns with circular economy principles. Full article
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