摘要
具有放射性有毒废弃物存放的威胁日益严重,其中^(137)Cs和^(90)Sr是放射性废液中半衰期较长的热裂变产物,具有很强的生物毒性,尤其是以放射性核废水处理最为棘手。因此,开发能够有效去除Cs^(+)、Sr^(2+)放射性离子的新技术对保护环境具有重要的意义。以Na_(2)CO_(3)、MnCO_(3)为原料,采用固相烧结的方法制备了Na_(4)Mn_(9)O_(18)和Na_(0.7)MnO_(2.05)的锰酸盐离子筛,通过调整制备工艺的条件调控锰酸盐离子筛的晶体结构与孔径。同时,验证了所制备材料在模拟海水环境下吸附锶离子的能力。研究结果表明,所制备的层状结构的锶离子吸附剂即Na-Mn-O型锰酸盐吸附剂具有良好的选择性吸附和优异的吸附性能。
The threat of radioactive toxic waste storage is becoming more and more serious.Among them,^(137)Cs and^(90)Sr are thermal fission products with long half-life in radioactive waste liquid,which have strong biological toxicity,especially the treatment of radioactive nuclear waste water is the most difficult.Therefore,the development of new materials that can effectively remove ions such as Cs^(+)and Sr^(2+)is of great significance for the treatment of nuclear waste liquid.Using Na_(2)CO_(3)and MnCO_(3)as raw materials,the manganate ion sieves of Na_(4)Mn_(9)O_(18)and Na_(0.7)MnO_(2.05)were prepared by solid-state sintering.The crystal structure and pore size of the manganate ion sieves were adjusted by adjusting the preparation conditions.At the same time,the ability of the prepared materials to adsorb strontium ions in simulated seawater environment was verified.The results showed that the layered strontium ion adsorbent,namely Na-Mn-O manganate adsorbent,had good selective adsorption and excellent adsorption performance.
作者
张欢
何仕婕
刘瑞鑫
周东升
王芳芳
陈常东
ZHANG Huan;HE Shijie;LIU Ruixin;ZHOU Dongsheng;WANG Fangfang;CHEN Changdong(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun Liaoning 113001,China;Sinopec Lubricants Limited Northwest Branch,Zhengzhou Henan 450000,China)
出处
《当代化工》
CAS
2024年第6期1340-1345,共6页
Contemporary Chemical Industry
基金
教育部“春晖计划”合作科研项目(项目编号:2020703-8)
辽宁省教育厅科学技术研究项目(项目编号:L20197036)
辽宁省大学生创新创业训练计划项目(项目编号:2021101480070)。
关键词
锶离子
锰酸盐离子筛
层状结构
吸附剂
Strontium ions
Manganate ion sieve
Layered structure
Adsorbent
