Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization
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). T...
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| Online Access: | http://www.mdpi.com/1996-1073/9/12/996 |
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| author | Jun-Hwan Bang Seung-Woo Lee Chiwan Jeon Sangwon Park Kyungsun Song Whan Joo Jo Soochun Chae |
| author_facet | Jun-Hwan Bang Seung-Woo Lee Chiwan Jeon Sangwon Park Kyungsun Song Whan Joo Jo Soochun Chae |
| author_sort | Jun-Hwan Bang |
| collection | DOAJ |
| description | 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. |
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| id | doaj.art-5825a667e4b447fe8623e322e6e4e55b |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T11:10:36Z |
| publishDate | 2016-11-01 |
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| series | Energies |
| spelling | doaj.art-5825a667e4b447fe8623e322e6e4e55b2022-12-22T04:27:28ZengMDPI AGEnergies1996-10732016-11-0191299610.3390/en9120996en9120996Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 MineralizationJun-Hwan Bang0Seung-Woo Lee1Chiwan Jeon2Sangwon Park3Kyungsun Song4Whan Joo Jo5Soochun Chae6CO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaCO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaCO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaCO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaCO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaCO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaCO<sub>2</sub> Sequestration Department, Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahang-no, Yuseong-gu, Daejeon 34132, KoreaBlast 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.http://www.mdpi.com/1996-1073/9/12/996blast furnace slagCO2 mineralizationcalcium leaching |
| spellingShingle | Jun-Hwan Bang Seung-Woo Lee Chiwan Jeon Sangwon Park Kyungsun Song Whan Joo Jo Soochun Chae Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization Energies blast furnace slag CO2 mineralization calcium leaching |
| title | Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization |
| title_full | Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization |
| title_fullStr | Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization |
| title_full_unstemmed | Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization |
| title_short | Leaching of Metal Ions from Blast Furnace Slag by Using Aqua Regia for CO2 Mineralization |
| title_sort | leaching of metal ions from blast furnace slag by using aqua regia for co2 mineralization |
| topic | blast furnace slag CO2 mineralization calcium leaching |
| url | http://www.mdpi.com/1996-1073/9/12/996 |
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