Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions
AbstractThe carbonation of asbestos-containing waste slate using a direct aqueous mineral carbonation method was evaluated. Leaching and carbonation tests were conducted on asbestos-containing waste slate using ammonium salt (CH3COONH4, NH4NO3, and NH4HSO4) solutions at various concentrations. The CH3COONH4 solution had the highest Ca-leaching efficiency (17%–35%) and the NH4HSO4 solution had the highest Mg-leaching efficiency (7%–24%) at various solid dosages and solvent concentrations. The CaCO3 content of the reacted materials based on thermogravimetric analysis (TGA) was approximately 10%–17% higher than that of the as-received material for the 1 M CH3COONH4 and the 1 M NH4HSO4 solutions. The carbonates were precipitated on the surface of chrysotile, which was contained in the waste slate reacted with CO2. These results imply that CO2 can be sequestered by a direct aqueous mineral carbonation using waste slate. View Full-Text
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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.
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.Chicago/Turabian Style
Jo, Hwanju; Jo, Ho Y.; Rha, Sunwon; Lee, Pyeong-Koo. 2015. "Direct Aqueous Mineral Carbonation of Waste Slate Using Ammonium Salt Solutions." Metals 5, no. 4: 2413-2427.