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Materials
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Waste Materials: Recycle and Valorize
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Waste Materials: Recycle and Valorize

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Green Materials".

Deadline for manuscript submissions: 20 August 2026 | Viewed by 1108

Special Issue Editors

Dr. Lorena Alcaraz

E-Mail Website
Guest Editor
Consejo Superior de Investigaciones Científicas (CSIC)—Centro Nacional de Investigaciones Metalúrgicas (CENIM), Madrid, Spain
Interests: energy transition; recycling; sustainability; materials, revalorization
Dr. Olga Rodríguez Largo

E-Mail Website
Guest Editor
Consejo Superior de Investigaciones Científicas (CSIC)—Centro Nacional de Investigaciones Metalúrgicas (CENIM), Madrid, Spain
Interests: recycling; waste; hydrometallurgy; circular economy; mining waste; battery waste; metals; rare earth
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In a world constantly demanding sustainable solutions, waste is no longer a problem but rather an opportunity. This Special Issue of Materials, entitled “Waste Materials: Recycle and Valorize,” explores the transformative potential of discarded materials—from industrial and agricultural waste to plastics and metals—by addressing innovative strategies for their recycling, reuse, and valorization. Advances in recycling technologies, the transformation of waste into useful materials and energy, the circular economy applied to materials science, and novel strategies for eco-efficiency and sustainable design are all topics covered by this Special Issue.

This Special Issue invites researchers, engineers, and industry professionals to discover how science can turn discarded materials into resources.

Dr. Lorena Alcaraz
Dr. Olga Rodríguez Largo
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 250 words) can be sent to the Editorial Office for assessment.

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. Materials is an international peer-reviewed open access semimonthly 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 2600 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

  • waste valorization
  • waste management
  • recycling technologies
  • circular economy
  • sustainable design
  • waste reuse
  • resource recovery
  • sustainable solutions

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Published Papers (2 papers)

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Research

20 pages, 11699 KB  
Article
Cyclic Behavior of Cellular Glass Aggregates: An Experimental Comparison with Natural Aggregates
by Layal Jradi, Bassel Seif El Dine, Jean-Claude Dupla and Jean Canou
Materials 2026, 19(5), 993; https://doi.org/10.3390/ma19050993 - 4 Mar 2026
Viewed by 364
Abstract
The construction sector is a major user of natural materials and a key contributor to global carbon emissions. To tackle these environmental challenges, the use of recycled products has become increasingly important in modern engineering. Cellular glass aggregate (CGA), made from recycled glass, [...] Read more.
The construction sector is a major user of natural materials and a key contributor to global carbon emissions. To tackle these environmental challenges, the use of recycled products has become increasingly important in modern engineering. Cellular glass aggregate (CGA), made from recycled glass, is a material with potential as a sustainable alternative to natural aggregates. This study characterizes the cyclic behavior of CGA using a large-scale triaxial apparatus, focusing on seismic-relevant properties such as the damping ratio and Young’s modulus. Local displacement transducers (LDTs) were implemented to improve measurement at small strains. The results show that CGA exhibits strain-dependent stiffness and damping behavior comparable to natural aggregates at moderate strains (10−4–10−3). The Young’s modulus ranges from approximately 300 to 600 MPa, while damping ratios remain at approximately 2–3% for low values of strains (10−5). As strain increases to moderate levels (10−4–10−3), the Young’s modulus decreases to approximately 80–250 MPa, accompanied by an increase in damping ratio to approximately 4–6%. At higher strain levels ≥ 10−3, the Young’s modulus further reduces to approximately 40–80 MPa, while damping ratios increase to approximately 7–10%. These stiffness degradation and damping trends fall within the ranges reported for sands and gravelly soils in the literature, indicating that CGA can reproduce the cyclic mechanical behavior of natural aggregates under well-defined strain conditions. Full article
(This article belongs to the Special Issue Waste Materials: Recycle and Valorize)
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17 pages, 5285 KB  
Article
Challenges and Practices in the Analysis of Silicon Kerf from the PV Industry by Combinatorial Analytical Methods
by Tinotenda Mubaiwa, Marisa Di Sabatino, Sergey Khromov, Marthe Nybrodahl, Alexander Azarov and Jafar Safarian
Materials 2026, 19(3), 541; https://doi.org/10.3390/ma19030541 - 29 Jan 2026
Viewed by 459
Abstract
Exploitation of waste streams has gained prominence not only in sustainable use of resources but also as a potential source of raw materials. Silicon kerf is one such waste stream and its recycling has been quite topical in recent years. In the present [...] Read more.
Exploitation of waste streams has gained prominence not only in sustainable use of resources but also as a potential source of raw materials. Silicon kerf is one such waste stream and its recycling has been quite topical in recent years. In the present study, the characterization of different industrial kerf samples was carried out using several techniques. The average metallic impurity concentration was approximately 400 ppmw with average particle size (D50) of 3.5 µm and surface area of approximately 33 m2/g. The inhomogeneity of kerf was shown to pose challenges like potential isotope interferences during analysis as well as being susceptible to high uncertainties and relative standard deviation (RSD). Remedies and best practices were recommended for successful characterization of such inhomogeneous materials. Full article
(This article belongs to the Special Issue Waste Materials: Recycle and Valorize)
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