Morphological Investigation of Calcium Carbonate during Ammonification-Carbonization Process of Low Concentration Calcium Solution

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="503696.fig.002a" src="https://static.hindawi.com/articles/jnm/volume-2014/503696/figures/503696.fig.002a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Solutions: CaCl<sub>2</sub>, 0.18 mol/L; Na<sub>2</sub>CO<sub>3</sub>, 0.18 mol/L</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="503696.fig.002b" src="https://static.hindawi.com/articles/jnm/volume-2014/503696/figures/503696.fig.002b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Solutions: CaCl<sub>2</sub>, 0.18 mol/L; Na<sub>2</sub>CO<sub>3</sub>, 0.18 mol/L; NH<sub>3</sub>, 3.39 mol/L</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="503696.fig.002c" src="https://static.hindawi.com/articles/jnm/volume-2014/503696/figures/503696.fig.002c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Solutions: NH<sub>3</sub>, 0.36 mol/L; CaSO<sub>4</sub>, 0.15 mol/L. CO<sub>2</sub> gas: 60 mL/min × 20 min</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="503696.fig.002d" src="https://static.hindawi.com/articles/jnm/volume-2014/503696/figures/503696.fig.002d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Solutions: NH<sub>3</sub>, 1.47 mol/L; CaSO<sub>4</sub>, 0.15 mol/L. CO<sub>2</sub> gas: 60 mL/min × 20 min</td></tr></table></td></tr></table>

<table>Morphology of calcium carbonate precipitate with and without ammonification.</table>

Journal of Nanomaterials

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Figure 2

Figure 2: Morphological Investigation of Calcium Carbonate during Ammonification-Carbonization Process of Low Concentration Calcium Solution 