新型球形复合无机离子交换剂的制备及其对锶和铯的去除  

PREPARATION OF NEW TYPES OF SPHERICAL COMPOSITE ION-EXCHANGERS AND THEIR REMOVING OF Sr^(2+) AND Cs^+

作　　者：储昭升[1] 孙兆祥[1] 

机构地区：[1]北京师范大学化学系,北京100875

出　　处：《北京师范大学学报（自然科学版）》2002年第1期90-95,共6页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(59572024)

摘　　要：用溶胶凝胶的方法制备了新型球形复合无机离子交换剂水合二氧化钛-水合五氧化二锑（HTO-HAP），并以此为基体，进一步制备了磷酸钛-五氧化二锑(TiP-HAP)、 磷酸钛-五氧化二锑-磷钼酸铵(TiP-HAP-AMP)球形复合无机离子交换剂.研究比较了它们对Sr2+和Cs+的离子交换性能和稳定性.结果表明：HTO-HAP在弱酸性条件下对Sr2+和Cs+有较大的交换容量，但耐酸性不好；而作为基体与磷酸反应，或进一步复合磷钼酸铵后，其耐酸性和对Cs+的交换性能均有较大增强.Spherical composite ion-exchanger hydrated titanium dioxide hydrated antimony pentoxide (HTO-HAP) was synthesized by the sol-gel method. And using it as matrix, titanium phosphate-hydrated antimony pentoxide (TiP-HAP) and titanium phosphate-hydrated antimony pentoxide-ammonium molybdophophate (TiP-HAP-AMP) are prepared. Their stabilities are tested and ion exchange properties for Sr2+ and Cs+ are studied. The results show that the HTO HAP has high ion exchange capacity for Sr2+ and Cs+ while not stable under strong acid condition. But after the reaction with phosphoric acid or ammonium molybdophophate, the acid fastness and exchange capacity for Cs+ in strong acid condition are greatly improved.

关 键 词：复合无机离子交换剂 溶胶-凝胶法 铯 锶 交换容量 交换性能 交换稳定性 

分 类 号：O647.316.2[理学—物理化学]