Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions
Abstract
:1. Introduction
2. Experimental Section
2.1. Materials
2.2. Leaching Tests
2.3. Carbonation Tests
2.4. Chemical Analysis and Material Characterization
3. Results and Discussion
3.1. Raw Material
Materials | Composition (wt. %) | Minerals (XRD) | ||||
---|---|---|---|---|---|---|
Ca | Mg | Al | Fe | Si | ||
Waste slate | 25.2 | 2.2 | 1.4 | 1.3 | 1.4 | Calcite, Chrysotile, and Ca-Mg-Al-Si-oxide minerals |
3.2. Leaching Behaviors
3.3. Carbonation Behaviors
Solvent | Solid dosage (g/L) | pH | Cation Concentration (mg/L) | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Leaching | Ca | Mg | Fe | Si | ||||||
Leaching | Carbonation | Leaching | Carbonation | Leaching | Carbonation | Leaching | Carbonation | |||
1 M CH3COONH4 | 20 | 9.0 | 1707.2 | 375.2 | 51.3 | 136.8 | 0.1 | 0.9 | 44.3 | 21.6 |
50 | 9.4 | 3533.2 | 652.3 | 77.5 | 345.9 | 0.2 | 0.6 | 41.3 | 32.1 | |
100 | 9.7 | 6002.2 | 1955.0 | 91.9 | 784.1 | 0.2 | 0.5 | 39.9 | 24.7 | |
150 | 9.8 | 7429.2 | 2597.0 | 87.4 | 1200 | 0.7 | 0.4 | 37.0 | 30.2 | |
1 M NH4HSO4 | 20 | 9.0 | 778.1 | 709.9 | 100.9 | 154.4 | 1.0 | 0.6 | 40.5 | 16.4 |
50 | 9.2 | 822.9 | 797.5 | 210.3 | 342.7 | 0.1 | 0.4 | 50.3 | 24.0 | |
100 | 9.7 | 755.9 | 751.9 | 263.3 | 824.1 | 0.4 | 1.2 | 52.5 | 16.1 | |
150 | 9.8 | 655.1 | 852.7 | 214.3 | 1234 | 0.3 | 0.5 | 48.9 | 26.3 |
3.4. Characteristics of Reacted Asbestos-Containing Waste Slate
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Jo, H.; Jo, H.Y.; Rha, S.; Lee, P.-K. Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions. Metals 2015, 5, 2413-2427. https://doi.org/10.3390/met5042413
Jo H, Jo HY, Rha S, Lee P-K. Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions. Metals. 2015; 5(4):2413-2427. https://doi.org/10.3390/met5042413
Chicago/Turabian StyleJo, Hwanju, Ho Young Jo, Sunwon Rha, and Pyeong-Koo Lee. 2015. "Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions" Metals 5, no. 4: 2413-2427. https://doi.org/10.3390/met5042413