Stabilization of red mud using mineral carbonation
Mineral carbonation is a promising technique to reduce the atmospheric carbon dioxide (CO2) concentration via precipitation of stable carbonates. This study examined the mineralization potential of red mud, a byproduct of the aluminium manufacturing industry. The alkaline nature of red mud has hinde...
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Elsevier
2025-03-01
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| Series: | Cleaner Engineering and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666790825000497 |
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| author | Saranyadevi Duraisamy Piyush Chaunsali |
| author_facet | Saranyadevi Duraisamy Piyush Chaunsali |
| author_sort | Saranyadevi Duraisamy |
| collection | DOAJ |
| description | Mineral carbonation is a promising technique to reduce the atmospheric carbon dioxide (CO2) concentration via precipitation of stable carbonates. This study examined the mineralization potential of red mud, a byproduct of the aluminium manufacturing industry. The alkaline nature of red mud has hindered its widespread utilization, causing issues associated with its storage and disposal. The limited calcium concentration and high iron content pose challenges with regard to CO2 mineralization, and the optimal conditions for mineralization have not been explored well. In the present study, three different temperatures (25 °C, 45 °C, and 65 °C) at high pressure of 10 bar were employed to study the mineralization potential of red mud. The red mud mineralized at 45 °C outperformed others. After mineralization, compressive strength increased by 11.6 %, 64 %, and 50 % at 25 °C, 45 °C, and 65 °C, respectively. A marginal increase in calcite precipitation and noticeable reduction (720–510 nm) in critical pore size was observed due to mineralization at 45 °C. Microstructural study revealed that the hematite phase in the red mud provided nucleation site for the carbonate phase, contributing to a denser microstructure. The agglomeration of mineralized phases indicated a marginal increase in true density, leading to a denser microstructure and higher strength after mineralization. Furthermore, dimensional stability (in water immersion) and acid neutralization capacity of mineralized red mud were examined. |
| format | Article |
| id | doaj-art-e5d89a88b48d45088511b7f1959e210b |
| institution | DOAJ |
| issn | 2666-7908 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Engineering and Technology |
| spelling | doaj-art-e5d89a88b48d45088511b7f1959e210b2025-08-20T02:53:12ZengElsevierCleaner Engineering and Technology2666-79082025-03-012510092610.1016/j.clet.2025.100926Stabilization of red mud using mineral carbonationSaranyadevi Duraisamy0Piyush Chaunsali1Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, 600036, IndiaCorresponding author.; Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, 600036, IndiaMineral carbonation is a promising technique to reduce the atmospheric carbon dioxide (CO2) concentration via precipitation of stable carbonates. This study examined the mineralization potential of red mud, a byproduct of the aluminium manufacturing industry. The alkaline nature of red mud has hindered its widespread utilization, causing issues associated with its storage and disposal. The limited calcium concentration and high iron content pose challenges with regard to CO2 mineralization, and the optimal conditions for mineralization have not been explored well. In the present study, three different temperatures (25 °C, 45 °C, and 65 °C) at high pressure of 10 bar were employed to study the mineralization potential of red mud. The red mud mineralized at 45 °C outperformed others. After mineralization, compressive strength increased by 11.6 %, 64 %, and 50 % at 25 °C, 45 °C, and 65 °C, respectively. A marginal increase in calcite precipitation and noticeable reduction (720–510 nm) in critical pore size was observed due to mineralization at 45 °C. Microstructural study revealed that the hematite phase in the red mud provided nucleation site for the carbonate phase, contributing to a denser microstructure. The agglomeration of mineralized phases indicated a marginal increase in true density, leading to a denser microstructure and higher strength after mineralization. Furthermore, dimensional stability (in water immersion) and acid neutralization capacity of mineralized red mud were examined.http://www.sciencedirect.com/science/article/pii/S2666790825000497CO2 mineralizationRed mudMicrostructural characterization |
| spellingShingle | Saranyadevi Duraisamy Piyush Chaunsali Stabilization of red mud using mineral carbonation Cleaner Engineering and Technology CO2 mineralization Red mud Microstructural characterization |
| title | Stabilization of red mud using mineral carbonation |
| title_full | Stabilization of red mud using mineral carbonation |
| title_fullStr | Stabilization of red mud using mineral carbonation |
| title_full_unstemmed | Stabilization of red mud using mineral carbonation |
| title_short | Stabilization of red mud using mineral carbonation |
| title_sort | stabilization of red mud using mineral carbonation |
| topic | CO2 mineralization Red mud Microstructural characterization |
| url | http://www.sciencedirect.com/science/article/pii/S2666790825000497 |
| work_keys_str_mv | AT saranyadeviduraisamy stabilizationofredmudusingmineralcarbonation AT piyushchaunsali stabilizationofredmudusingmineralcarbonation |