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Minerals
Special Issues
CO2 Mineralization and Utilization
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CO2 Mineralization and Utilization

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Extractive Metallurgy".

Deadline for manuscript submissions: 30 June 2024 | Viewed by 2038

Special Issue Editors

Dr. Fei Wang

E-Mail Website
Guest Editor
Department of Mining, Metallurgical and Materials Engineering, Laval University, Quebec City, QC G1V 0A6, Canada
Interests: CO2 mineralization and utilization; hydrometallurgical extraction of critical metals; comprehensive utilization of mineral resources
Prof. Dr. Rafael Santos

E-Mail Website
Guest Editor
School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada
Interests: CO2 sequestration and utilization; solid waste valorization; mineral synthesis; mineralogical characterization; (bio)hydrometallurgy; geochemical modeling; environmental remediation; process intensification
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Effective reduction in CO2 emissions towards carbon neutrality needs both CO2 mineralization and enhanced supply of critical materials to facilitate the clean energy transition as direct and indirect approaches, respectively. CO2 mineralization is one example of the self-regulatory mechanisms of the Earth and can be accelerated to capture and store excessive CO2 gas as stable mineral carbonates. Accelerated CO2 mineralization can be also utilized in many aspects of anthropology activities, e.g., enhancing the growth of agricultural crops, enhancing metal recovery, producing nanosilicas, etc. With the global transition to clean energy, the utilization of CO2 mineralization plays an increasingly important role in enhancing the recovery of critical materials with minimizing CO2 emissions for sustainable development.

Dr. Fei Wang
Dr. Rafael Santos
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. Minerals 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

  • CO2 mineralization and utilization
  • carbon capture utilization and storage (CCUS)
  • carbon neutrality
  • clean energy transition
  • sustainable development
  • CO2 emission reduction
  • enhanced metal recovery (EMR)
  • critical and strategic minerals (MCS)

Published Papers (2 papers)

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Research

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18 pages, 17298 KiB  
Article
Accelerated Carbonation of High-Calcite Wollastonite Tailings
by Arnold Ismailov, Niina Merilaita and Erkki Levänen
Minerals 2024, 14(4), 415; https://doi.org/10.3390/min14040415 - 18 Apr 2024
Viewed by 349
Abstract
Wollastonite (CaSiO3) is the most researched and well-defined mineral in the field of CO2 mineralization, but it is also a sought-after process mineral and thus, not easily justified for large scale ex situ carbon sequestration, which requires an energy-intensive step [...] Read more.
Wollastonite (CaSiO3) is the most researched and well-defined mineral in the field of CO2 mineralization, but it is also a sought-after process mineral and thus, not easily justified for large scale ex situ carbon sequestration, which requires an energy-intensive step of comminution to increase reactivity. Wollastonite-rich mine tailings are a side stream with an already fine particle size resulting from the extractive process, but their effective utilization is problematic due to legislation, logistics, a high number of impurities, and chemical inconsistency. In this study, the accelerated weathering (aqueous carbonation) of high-calcite (CaCO3) wollastonite tailings was studied under elevated temperatures and high partial pressures of CO2 to determine the carbon sequestration potential of those tailings compared to those of pure reference wollastonite originating from the same quarry. The main process variables were pressure (20–100 bar), temperature (40 °C–60 °C), and time (10 min–24 h). Despite consisting largely of non-reactive silicates and primary calcite, very fine tailings showed promise in closed-chamber batch-type aqueous carbonation, achieving a conversion extent of over 28% in one hour at 100 bar and 60 °C. Full article
(This article belongs to the Special Issue CO2 Mineralization and Utilization)
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15 pages, 54235 KiB  
Technical Note
Integration of Modified Solvay Process for Sodium Bicarbonate Synthesis from Saline Brines with Steelmaking for Utilization of Electric Arc Furnace Slag in CO2 Sequestration and Reagent Regeneration
by Shadman Monir Anto, Asif Ali and Rafael M. Santos
Minerals 2024, 14(1), 97; https://doi.org/10.3390/min14010097 - 16 Jan 2024
Viewed by 1240
Abstract
In the pursuit of sustainable solutions for carbon dioxide CO2 sequestration and emission reduction in the steel industry, this study presents an innovative integration of steelmaking slag with the modified Solvay process for sodium bicarbonate (NaHCO3) synthesis from saline brines. [...] Read more.
In the pursuit of sustainable solutions for carbon dioxide CO2 sequestration and emission reduction in the steel industry, this study presents an innovative integration of steelmaking slag with the modified Solvay process for sodium bicarbonate (NaHCO3) synthesis from saline brines. Utilizing diverse minerals, including electric arc furnace (EAF) slag, olivine, and kimberlite, the study explored their reactivity under varied pH conditions and examined their potential in ammonium regeneration. SEM and WDXRF analyses were utilized to acquire morphological and chemical compositions of the minerals. Advanced techniques such as XRD and ICP-OES were employed to meticulously analyze mineralogical transformations and elemental concentrations. The findings demonstrate that steelmaking slag, owing to its superior reactivity and pH buffering capabilities, outperforms natural minerals. The integration of finer slag particles significantly elevated pH levels, facilitating efficient ammonium regeneration. Geochemical modeling provided valuable insights into mineral stability and reactivity, which aligned with the ICP-OES results. This synergistic approach not only aids in CO2 capture through mineral carbonation but also minimizes waste, showcasing its potential as a sustainable and environmentally responsible solution for CO2 mitigation in the steel industry. Full article
(This article belongs to the Special Issue CO2 Mineralization and Utilization)
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