Research Article
Morphological Investigation of Calcium Carbonate during Ammonification-Carbonization Process of Low Concentration Calcium Solution
Figure 5
Morphology of calcium carbonate precipitate with different additives.
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| (a) Solutions: NH3, 1.47 mol/L; CaSO4, 0.15 mol/L. CO2 gas: 55 mL/min × 20 min |
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| (b) Solutions: NH3, 1.47 mol/L; CaSO4, 0.15 mol/L; NaCl, 1.65 mol/L. CO2 gas: 55 mL/min × 20 min |
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| (c) Solutions: NH3, 0.29 mol/L; CaSO4, 0.15 mol/L; CH3CH2OH, 1.72 mol/L. CO2 gas: 40 mL/min × 20 min |
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| (d) Solutions: NH3, 0.29 mol/L; CaSO4, 0.15 mol/L; CH3COONa, 1.21 mol/L. CO2 gas: 40 mL/min × 20 min |
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| (e) Solutions: NH3, 0.29 mol/L; CaSO4, 0.15 mol/L; anionic surfactant, 2 mL/L. CO2 gas: 40 mL/min × 20 min |
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