Sustainable Recycling and Reuse of Industrial By-Products or Waste from Geo-Resource Exploitation

Topic Information

Dear Colleagues,

Recycling waste generated by the industrial exploitation of georesources could enhance the utilization of the useful minerals they contain, such as rare earth elements (REEs), critical raw materials (CRMs) and secondary raw materials. Consciously recovering quarry waste or reusing the waste produced by processing operations for georesources means considering them no longer as waste, but as secondary raw materials to be used in further production processes from the perspective of a circular economy; this thus enables vital objectives, such as the following, to be pursued:

• The recovery of mineral raw materials resulting in the opening of new markets;
• A reduction in landfills (up to their possible removal), resulting in soil dumping and a reduced impact on the landscape;
• A reduction of business burdens related to the disposal and generation of added value related to the sale of mineral concentrates directly from quarries.

Herein, this Topic aims to collect original research articles and review papers.

The scope of this Topic includes, but is not limited to, the following areas of interest:

• industrial waste management;
• secondary raw materials;
• exploitation of industrial by-products;
• natural deposits and recovery of critical metals from waste materials and landfills;
• innovative approaches for mineral exploitation;
• sustainability in industrial processing;
• sustainability in quarrying waste disposal.

Dr. Sossio Fabio Graziano
Dr. Rossana Bellopede
Dr. Giovanna Antonella Dino
Dr. Nicola Careddu
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Materials materials	3.4	5.2	2008	13.9 Days	CHF 2600	Submit
Mining mining	-	-	2021	15 Days	CHF 1000	Submit
Recycling recycling	4.3	5.4	2016	20 Days	CHF 1800	Submit
Resources resources	3.3	7.7	2012	23.8 Days	CHF 1600	Submit
Sustainability sustainability	3.9	5.8	2009	18.8 Days	CHF 2400	Submit

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Published Papers (3 papers)

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All Materials Mining Recycling Resources Sustainability

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19 pages, 4295 KiB  

Open AccessArticle

Geopolymerization of Recycled Glass Waste: A Sustainable Solution for a Lightweight and Fire-Resistant Material

by Marios Valanides, Konstantinos Aivaliotis, Konstantina Oikonomopoulou, Alexandros Fikardos, Pericles Savva, Konstantinos Sakkas and Demetris Nicolaides

Recycling 2024, 9(1), 16; https://doi.org/10.3390/recycling9010016 - 07 Feb 2024

Viewed by 1483

Abstract

Glass is considered a sustainable material with achievable recovery rates within the EU. However, there are limited data available for construction glass waste management. Furthermore, glass is a heavy material, and considering the geographical limitations of Cyprus, the transportation trading cost within the [...] Read more.

Glass is considered a sustainable material with achievable recovery rates within the EU. However, there are limited data available for construction glass waste management. Furthermore, glass is a heavy material, and considering the geographical limitations of Cyprus, the transportation trading cost within the EU is extremely high. Therefore, another method for utilizing this by-product should be developed. The aim of this research is to investigate the production of a low-cost, lightweight and fireproof material able to retain its structural integrity, using the geopolymerization method with the incorporation of randomly collected construction glass waste. The glass waste was initially processed in a Los Angeles abrasion machine and then through a Micro-Deval apparatus in order to be converted to a fine powder. Mechanical (compressive and flexural strength), physical (setting time and water absorption) and thermal properties (thermal conductivity) were investigated. The fire-resistant materials presented densities averaging 450 kg/m³ with a range of compressive strengths of 0.5 to 3 MPa. Additionally, a techno-economic analysis was conducted to evaluate the viability of the adopted material. Based on the results, the final geopolymer product has the potential to be utilized as a fire resistance material, preventing yielding or spalling. Full article

(This article belongs to the Topic Sustainable Recycling and Reuse of Industrial By-Products or Waste from Geo-Resource Exploitation)

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16 pages, 6752 KiB  

Open AccessArticle

Effect of Limestone Powder Mixing Methods on the Performance of Mass Concrete

by Lele Zhao, Tingshu He, Mengdie Niu, Xiulong Chang, Lei Wang and Yan Wang

Materials 2024, 17(3), 617; https://doi.org/10.3390/ma17030617 - 27 Jan 2024

Viewed by 525

Abstract

Using limestone powder (LP), the by-product of manufactured sand, to replace part of fly ash (FA) or manufactured sand could not only turn waste into treasure and decrease the price of concrete, but could also enhance the performance of concrete and reduce environmental [...] Read more.

Using limestone powder (LP), the by-product of manufactured sand, to replace part of fly ash (FA) or manufactured sand could not only turn waste into treasure and decrease the price of concrete, but could also enhance the performance of concrete and reduce environmental pollution. However, the impact of various LP incorporation methods on the performance of mass concrete was inconsistent. In this paper, the effects of LP on the workability, compressive strength, constrained expansion rate, hydration temperature and impermeability of mass concrete were studied by replacing FA or manufactured sand alone and replacing FA and manufactured sand simultaneously. The results showed that the impact of LP on the performance of mass concrete was equal when it replaced FA alone and FA and manufactured sand at the same time. When the replacement amount was 20%, the workability, expansibility and early strength of concrete were improved, but the later strength and impermeability were slightly reduced. The workability, compressive strength, expansibility and impermeability of mass concrete were improved when manufactured sand was replaced alone, and the optimal dosage was 10%. The LP, moreover, reduced the hydration temperature peak of concrete in three kinds of mixing methods, but the temperature peak appeared earlier. At lower dosages, LP optimized pore structure and promoted the early hydration of cement through filler effects and nucleation effects. When LP replaced manufactured sand, the microstructure of concrete was more dense, so the replacement of manufactured sand had a better effect on the improvement of concrete properties. A reference value for the use of LP in mass concrete is provided in this study. Full article

(This article belongs to the Topic Sustainable Recycling and Reuse of Industrial By-Products or Waste from Geo-Resource Exploitation)

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21 pages, 9465 KiB  

Open AccessArticle

Removal of Fe³⁺ Ions from Aqueous Solutions by Adsorption on Natural Eco-Friendly Brazilian Palygorskites

by Antonieta Middea, Luciana dos Santos Spinelli, Fernando Gomes de Souza Junior, Thais de Lima Alves Pinheiro Fernandes, Luiz Carlos de Lima, Vitoria Maria Tupinamba Souza Barthem, Otávio da Fonseca Martins Gomes and Reiner Neumann

Mining 2024, 4(1), 37-57; https://doi.org/10.3390/mining4010004 - 19 Jan 2024

Viewed by 624

Abstract

This work focuses on the characterization of five palygorskite clays from the Brazilian state of Piaui and their feasibility as eco-friendly adsorbents for the removal of Fe³⁺ ions from aqueous solutions. For characterization, we applied the techniques of X-ray diffraction (XRD), X-ray [...] Read more.

This work focuses on the characterization of five palygorskite clays from the Brazilian state of Piaui and their feasibility as eco-friendly adsorbents for the removal of Fe³⁺ ions from aqueous solutions. For characterization, we applied the techniques of X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), size distribution measurements, density measurement by He pycnometry, superconducting quantum interference device (SQUID) magnetometry, Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA/DTA), zeta potential measurement, hydrophobicity determination by contact angle, Brunauer–Emmett–Teller surface area analysis (BET technique) and atomic force microscopy (AFM). Batch experiments were performed in function of process parameters such as contact time and initial concentration of Fe³⁺. The natural palygorskites (Palys) had excellent performance for the removal of Fe³⁺ from aqueous solutions by adsorption (around 60 mg/g), and the Langmuir is supposedly the best model fitted the experimental data. Full article

(This article belongs to the Topic Sustainable Recycling and Reuse of Industrial By-Products or Waste from Geo-Resource Exploitation)

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