【摘要】 本文研究了三种不同产地和属性膨润土的钠交换反应，对影响粘土CEC的Na+、H+浓度和温度等因素及其影响机制进行了深入的探讨和分析。在适宜的温度下，通过钠化可显著提高钠、钙基膨润土的CEC，但销饱和及溶液中存在H+时，粘土CEC重新下降。更多还原

【Abstract】 The sodium exchange reaction was studied on three bentonites with different origines and types. The influence factor and mechanism of the concentration of Na+ and H+ and temperature which affect the cation-exchange capacity of clay were discussed and analysed in detail. The cation-exchange capacity of sodium or calcium bentonite can be improved greatly by alkali activated at suitable temperature. The cationexchange capacity will decrease again when the sodium is saturated or H+ present in the system.更多还原