LAPSE:2019.0307
Published Article
LAPSE:2019.0307
Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO₂ Mineralization
Jun-Hwan Bang, Seung-Woo Lee, Chiwan Jeon, Sangwon Park, Kyungsun Song, Whan Joo Jo, Soochun Chae
February 27, 2019
Blast furnace slag (BFS) was selected as the source of Ca for CO₂ mineralization purposes to store CO₂ as CaCO₃. BFS was dissolved using aqua regia (AR) for leaching metal ions for CO₂ mineralization and rejecting metal ions that were not useful to obtain pure CaCO₃ (as confirmed by XRD analysis). The AR concentration, as well as the weight of BFS in an AR solution, was varied. Increasing the AR concentration resulted in increased metal ion leaching efficiencies. An optimum concentration of 20% AR was required for completely leaching Ca and Mg for a chemical reaction with CO₂ and for suppressing the leaching of impurities for the production of high-purity carbonate minerals. Increasing the liquid-to-solid ratio (L/S) resulted in the increased leaching of all metal ions. An optimum L/S of 0.3/0.03 (=10) was required for completely leaching alkaline-earth metal ions for CO₂ mineralization and for retaining other metal ions in the filtered residue. Moreover, the filtrate obtained using 20% AR and an L/S of 0.3/0.03 was utilized as Ca sources for forming carbonate minerals by CO₂ mineralization, affording CaCO₃. The results obtained herein demonstrated the feasibility of the use of AR, as well as increasing pH, for the storage of CO₂ as high-purity CaCO₃.
Keywords
blast furnace slag, calcium leaching, CO2 mineralization
Suggested Citation
Bang JH, Lee SW, Jeon C, Park S, Song K, Jo WJ, Chae S. Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO₂ Mineralization. (2019). LAPSE:2019.0307
Author Affiliations
Bang JH: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
Lee SW: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
Jeon C: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
Park S: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
Song K: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
Jo WJ: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
Chae S: CO; Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, Korea;
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Journal Name
Energies
Volume
9
Issue
12
Article Number
E996
Year
2016
Publication Date
2016-11-25
Published Version
ISSN
1996-1073
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PII: en9120996, Publication Type: Journal Article
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LAPSE:2019.0307
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doi:10.3390/en9120996
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Feb 27, 2019
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Calvin Tsay
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