镁-铝水滑石的制备及其脱色性能

Preparation of Mg-Al Hydrotalcite and Its Decolorization Property

以不同的Mg^2＋与Al^3＋摩尔比制备一系列的镁-铝水滑石，考察镁-铝水滑石对单一品种模拟分散染料废水的脱色效果。实验结果表明，以n（Mg^2＋）：n（Al^3＋）为3：1制得的镁-铝水滑石对模拟分散染料废水的脱色效果最好；脱色处理后的镁-铝水滑石再生后可重复使用，它对模拟分散染料废水的脱色效果与新的镁-铝水滑石的脱色效果几乎没有差别；在模拟分散染料废水pH为10～11、镁-铝水滑石的加入量为1.0g／L、反应2h的条件F，模拟分散染料废水的脱色率为98％。

A series of magnesium-aluminum hydrotalcite were prepared with different mol ratio of Mg^2＋ to Al^3＋. The decolorization effect of magnesium-aluminum hydrotalcite on simulated wastewater containing single dispersed dye was investigated. The results show that the decolorization effect of magnesium-aluminum hydrotalcite with mol ratio of Mg^2＋ to Al^＋3 3 ： 1 is the best, and the regenerated magnesium-aluminum hydrotalcite can be reused without different decolorization effect. Under the conditions of wastewater pH 10 - 11, dosage of magnesium-aluminum hydrotalcite 1.0 g/L and reaction time 2 h, the decolorization rate of simulated wastewater containing dispersed dye is 98 %.