阳离子膨润土制备和性质的研究

Studies on Preparation and Property of Positive Charged Montmorillonite

用插入法将混合金属层状氢氧化物正电胶体沉淀于膨润土矿物晶体层间,合成了阳离子膨润土,其最高ζ电位40mV。研究了温度、Mg^(2+)浓度、pH值及无机电解质等对阳离子土ζ电位的影响。发现该阳离子膨润土的悬浮体与不同价数的阴离子作用符合Schulze-Hardy规则,并对Al^(3+)有特性吸附,而对Mg^(2+)则没有。

The positive charged montmorillonite is prepared with positive mixed metal layered hydroxide deposited on montmorillonite by insertion reaction, it's highest ζpotential can reach +40 mV. The effect of temperature, concentration of Mg2+, pH and electrolyte on its ζpotential is studied. We consider that this positive charged montmorillonite has a characteristic adsorption on Al3+ and has no characteristic adsorption on Mg2+. The interaction between it's suspension and various valence anions is in agreement with Schulze-Hardy rule.