焦磷酸和锆的化合物对铯的吸附机理探讨  

Discussion on Adsorption Mechanism of Cesium by Zirconyl Pyrophosphate Compound

作　　者：宋凤丽 苏哲[2] 李辉波[2] 丛海峰[2] 吕丹 林灿生[2] 王孝荣[2] 叶国安[2] 

机构地区：[1]核与辐射安全中心核燃料与放射性废物部,北京100082 [2]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2014年第3期186-192,共7页Journal of Nuclear and Radiochemistry

摘　　要：在不同条件下合成了焦磷钼酸锆,选择出对铯吸附性能优良的焦磷钼酸锆。将焦磷酸氧锆和焦磷钼酸锆对铯的吸附性能进行了比较,并研究了焦磷酸氧锆对铯的吸附机理。结果表明:焦磷酸根与钼酸根摩尔比为8∶1、锆足量条件下制备所得焦磷钼酸锆吸附率最高;与焦磷钼酸锆相比,焦磷酸氧锆对铯的吸附受酸度的影响稍小,静态吸附容量稍大;焦磷酸氧锆与焦磷钼酸锆的化学稳定性相似;焦磷酸氧锆对铯的吸附属化学吸附,其吸附机理为Cs+与焦磷酸氧锆上羟基的H+发生离子交换反应。In this work,zirconyl molybopyrophosphate with good cesium adsorption per-formance was synthesized under different experimental conditions.The adsorption properties of zirconyl molybopyrophosphate and zirconyl pyrophosphate were compared.The adsorp-tion mechanism of cesium by zirconyl pyrophosphate was studied.With enough zirconyl and when the ratio of pyrophosphate to molybdate was 8∶1 ,zirconyl molybopyrophosphate with the best adsorption property was synthesized.Compared with zirconyl molybopyrophos-phate,the adsorption performance of zirconyl pyrophosphate,which has a higher static adsorption capacity,is less affected by the solution acidity.Zirconyl pyrophosphate and zirconyl molybopyrophosphate have similar chemical stabilities.The adsorption mechanism involves ion exchanges between hydrogen ions of hydroxyl radical and cesium ions and is chemical adsorption.

关 键 词：焦磷酸氧锆 吸附 铯 

分 类 号：TL241.15[核科学技术—核燃料循环与材料]