Abstract
Synthesis of various hydrothermal treatments for synthesis Ca-Mg-Al hydrotalcite from artificial brine water had been performed. The hydrothermal treatment has four variations with a temperature at 180 °C into Teflon lined stainless steel for 18 hours. The XRD result of the synthesis materials after various hydrothermal treatments has hydrotalcite phase and CaCO3. Therefore a preparation method might not discover a mixture of Ca and Al cations uniformly, and then a number of Ca cation agglomerated and enabled evidence that the radius of Ca2+ was larger than Mg2+. Le Bail refinement of the value of reliability index parameter especially X2 values has concern limitation value of reliability index. Lattice parameter a and c have a value of around 22 and 3 Å, respectively. Ca-Mg-Al hydrotalcite possesses crystallite size lower than Mg-Al hydrotalcite commercial. Infrared spectra has found hydroxyl band at region 3474.91 and 3072.74 cm-1, carbonate band at region 1365.66; 1491.04; 857.40; and 685.72 cm-1, and metal band at region 447.50; 553.59; 772.52 cm-1; and 975.06 cm−1.
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