改性膨润土的制备(Ⅱ)

The preparation of modified bentonit(Ⅱ)

研究了在不同添加剂（ Ｍ ｇ Ｃｌ２、 Ａｌ Ｃｌ３、 Ｍ ｇ Ｃｌ２－ Ｃａ Ｃｌ２ ）配比条件下，控制 ｐ Ｈ＝ ７～９，通过静态吸附，筛选出对含铬废水具有良好吸附性能的改性膨润土。结果说明，以 Ａｌ Ｃｌ３ 和 Ｍ ｇ Ｃｌ２ － Ｃａ Ｃｌ２ 为添加剂制得的改性膨润土，除铬效果良好。

Under different ratio of additives (MgCl 2,AlCl 3,MgCl 2-CaCl 2),the modified bentonit with good ability of absorbing chromium from wastewater was selected by using the electrostatic absorption method at pH=7～9. The modified bentonit prepared by using AlCl 3 and MgCl 2-CaCl 2 as additives has better ability to eliminate chromium.