水合二氧化钛-磷钼酸铵微球复合无机离子交换剂的合成  

SYNTHESIS OF SPHERICAL COMPLEX INORGANIC ION EXCHANGER HYDRATED TITANIUM DIOXIDE-AMMONIUM MOLYBDOPHOSPHATE

作　　者：臧春梅[1] 张改莲[1] 孙兆祥[1] 

机构地区：[1]北京师范大学化学系,北京100875

出　　处：《离子交换与吸附》2000年第5期406-412,共7页Ion Exchange and Adsorption

基　　金：国家自然科学基金(59572024)

摘　　要：采用溶胶-凝胶方法合成水合二氧化钛微球，以此为基体合成出水合二氧化钛-磷钼酸铵(HTO-AMP)球形复合无机离子交换剂，研究了复合交换剂的组成和稳定性，测定了不同交换条件下其对Cs+和Sr2+的交换性能，发现复合交换剂性能稳定，对Cs+在不同酸度下均有较好交换性能，对Sr2+则只有在低酸度时才有一定交换吸附。Hydrated titanium dioxide (HTO) microsphere was synthesized by the sol-gel method and a new composite ion exchanger as spherical hydrated titanium dioxide-ammonium molybdophosphate (HTO-AMP) was prepared. The appearance and composition of the ion exchanger were tested and its ion exchange properties for Cs+ and Sr2+ were studied. The results show that HTO-AMP has excellent mechanical, thermal and radioactive stability. It also has good selectivity and high ion exchange rate to Cs+ while adsorption to Sr2+ is limited by acid strength.

关 键 词：溶胶-凝胶方法 水合二氧化钛-磷钼酸铵离子交换剂 Cs^(+)和Sr^(2+) 离子交换 

分 类 号：TQ425.22[化学工程]