金属阳离子对蒙脱石水化膨胀影响的试验研究

Experimental study of the effect of metal cation on hydration swelling of montmorillonite

为了研究钠、钾、钙、镁离子溶液对蒙脱石水化膨胀的抑制性能,进行了蒙脱石自然沉降试验和过滤试验。研究结果表明,蒙脱石在钠、钾、钙、镁离子溶液中的体积膨胀程度依次为:Ca^(2+)> Mg^(2+)> Na^+> K^+;在钾离子溶液中蒙脱石过滤速度最快,钾离子对蒙脱石膨胀的抑制性能优于其他三种离子。

In order to investigate the ionic solutions of sodium, potassium, calcium and magnesium for inhibition of hydrated swelling of montmorillonite natural settling and filtration tests are made with montmorillonite. Test result indicates that： the volume expansion of montmorillonite in ionic solutions of the above mentioned elements is Ca^2＋〉Mg^2＋〉Na^＋〉K^＋ in order of degree of expansion; a higest montnorillionite filtration rate can be expected when it is placed in potassium ionic solution; and the montmorillionite swelling inhibition property of potassium ion is far superior to the other 3 ions.