盐湖卤水是非常重要的铷、铯来源之一，我国西部地区有非常丰富的盐湖卤水资源,然而利用盐湖卤水分离提取铷、铯等稀有金属的研究工作起步较晚、报道较少，普遍存在离子选择性差、分离能力小，操作困难等条件的限制,且吸附机理尚不明确。我们前期研究发现基于多金属氧酸盐（POMs）的晶态复合吸附材料具有稳定性高，离子选择性好，制备方法简单，可循环使用等优点，据此提出将这类吸附材料用于盐湖卤水中铷、铯离子的分离提取。采用水热合成的方法制备铷、铯复合吸附剂，利用其吸附功能和筛分效应对盐湖卤水中的铷、铯离子进行分离提取的研究，探讨其吸附量、选择性、回收率、吸附平衡及吸附动力学等关键问题。该研究对于阐明无机离子交换剂对盐湖卤水中铷铯离子的吸附机理具有重要意义，为解决盐湖卤水稀有金属离子分离提取中的关键技术提供思路。

Brine is one of the important rubidium and cesium resources. Western China is very rich in brine resources.However, the research work about the separation of rubidium and cesium from brine systems started late,and few studies have described. In the reported methods many defects could be found,such as,poor selectivity and separation,difficult to handle with. Therefore, the development of a simple, inexpensive, and practical method for the separation of rubidium and cesium from brine is very important. Our preliminary studies showd that the polyoxometalate-based crystalline composite adsorbent had high stability, and ion-selectivity, and the preparation method was simple, which can be used as absorbent for the separation of the rubidium and cesium ion form the brine. We intend to use the hydrothermal synthesis method to prepare the rubidium, cesium adsorbent, and their adsorption capacity, selectivity, recovery, adsorption kinetics and equilibrium under various experimental conditions will be studied.