Adsorption properties of cesium by natural Na-bentonite and Ca-bentonite
摘要
This study conducted several adsorption tests to cesium on natural Na-bentonite and Ca-bentonite. The results indicate that adsorption could be completed within 12 h, the optimal solid–liquid ratio was 20 g/L, a weakly alkaline environment was more suitable for adsorption, and the maximum adsorption capacity of Ca-bentonite measured at 114.5 mg/g, while Na-bentonite was 92.3 mg/g. The adsorption process was predominantly influenced by chemical factors and cesium underwent monolayer adsorption. Interlayer ion exchange and surface hydroxyl complexation were the primary mechanisms by which cesium was adsorbed onto bentonites.