Kameda Tomohito, Yoshioka Toshiaki, Mitsuhashi Teruhisa, Uchida Miho, Okuwaki Akitsugu
Department of Applied Chemistry, Graduate School of Engineering, Tohoku University, Aoba 07, Aoba-ku, Sendai 980-8579, Japan.
Water Res. 2003 Sep;37(16):4045-50. doi: 10.1016/S0043-1354(03)00311-7.
We investigated the removal of Ca(2+) and Cl(-) from CaCl(2) solution at 20-60 degrees C, using magnesium-aluminum oxide, Mg(0.80)Al(0.20)O(1.10), prepared by the thermal decomposition of a hydrotalcite-like compound, Mg(0.80)Al(0.20)(OH)(2)(CO(3))(0.10).0.78 H(2)O. The degree of Ca(2+) and Cl(-) removal from the solution increased with increasing initial CaCl(2) concentration, temperature, and quantity of Mg(0.80)Al(0.20)O(1.10) added. When Mg(0.80)Al(0.20)O(1.10) was added to 0.25 M CaCl(2) solution in a Mg(0.80)Al(0.20)O(1.10)/CaCl(2) molar ratio of 20, the degree of Ca(2+) and Cl(-) removal from the solution at 60 degrees C after 0.5 h was 93.0% and 98.2%, respectively. These results reveal that Mg(0.80)Al(0.20)O(1.10) has the capacity to remove Ca(2+) and Cl(-) simultaneously from aqueous solution.
我们研究了在20至60摄氏度下，使用通过类水滑石化合物Mg(0.80)Al(0.20)(OH)(2)(CO(3))(0.10).0.78 H(2)O热分解制备的镁铝氧化物Mg(0.80)Al(0.20)O(1.10)从氯化钙溶液中去除Ca(2+)和Cl(-)的情况。溶液中Ca(2+)和Cl(-)的去除程度随着初始氯化钙浓度、温度以及添加的Mg(0.80)Al(0.20)O(1.10)量的增加而提高。当以Mg(0.80)Al(0.20)O(1.10)/CaCl(2)摩尔比20向0.25 M氯化钙溶液中添加Mg(0.80)Al(0.20)O(1.10)时，在60摄氏度下0.5小时后溶液中Ca(2+)和Cl(-)的去除程度分别为93.0%和98.2%。这些结果表明Mg(0.80)Al(0.20)O(1.10)具有从水溶液中同时去除Ca(2+)和Cl(-)的能力。
