金属离子对水溶液中^(232)Th、^(237)Np、^(239)Pu电沉积的影响  

The Influence of Metal Ions on Synchronous Electrodeposition of ^(232)Th,^(237)Np and ^(239)Pu in Aqueous Solutions

作　　者：赵钰玲 陆地 张静 杜瑶芳 胡巧茹 王海涛 尚迪 ZHAO Yu-Ling;LU Di;ZHANG Jing;DU Yao-Fang;HU Qiao-Ru;WANG Hai-Tao;SHANG Di(Yantai Customs Technical Center,Yantai 264000;China Customs Science and Technology Research Center,Beijing 100026)

机构地区：[1]烟台海关技术中心,烟台264000 [2]中国海关科学技术研究中心,北京100026

出　　处：《中国口岸科学技术》2024年第7期68-73,共6页China Port Science and Technology

基　　金：海关总署科研项目(2022HK024)。

摘　　要：本文在优化的电沉积条件下,系统考察了K^(+)、Na^(+)、Ca^(2+)、Mg^(2+)、Fe^(2+)、Zn^(2+)等常见金属离子对^(232)Th、^(237)Np、^(239)Pu电沉积效率的影响。结果显示:干扰离子的存在会导致电沉积效率不同程度地降低;无论是单一核素还是多核素共存,干扰离子对232Th的电沉积效率影响最大,其次是^(237)Np,对^(239)Pu影响最小;越活泼的金属离子对3种核素电沉积效率影响越小,而越不活泼的金属离子得电子能力越强,部分会优先于目标核素沉积到不锈钢片上,导致目标核素不能沉积出来,或者影响目标核素在不锈钢片上的牢固性,导致目标核素电沉积效率降低。该研究结果为扩大电沉积法制源测定锕系核素的应用范围提供了参考依据。In this study,under optimized electrodeposition conditions,the influence of K^(+)、Na^(+),Ca^(2+),Mg^(2+),Fe^(2+),Zn^(2+) and other common metal ions on electrodeposition efficiency of 232Th,237Np and 239Pu has been systematically investigated.The results show that the presence of interfering ions leads to a reduction in the electrodeposition efficiency to varying degrees.Whether in the case of a single nuclide or coexistence of multiple nuclides,the interference of metal ions has the greatest effect on the electrodeposition efficiency of ^(232)Th,followed by ^(237)Np,with the least impact on ^(239)Pu.The more active the metal ions,the less influence they have on the electrodeposition efficiency of the three nuclides.Conversely,the less active the metal ions,the stronger their electron-accepting ability,and some may preferentially deposit onto the stainless steel substrate ahead of the target nuclides,thereby preventing the deposition of the target nuclides or affecting the stability of the target nuclides on the stainless steel substrate,resulting in low electrodeposition efficiency.The findings of this study provide a reference for expanding the application range of the electrodeposition method for the determination of actinide nuclides.

关 键 词：电沉积 锕系核素 ^(232)Th ^(237)Np ^(239)Pu 

分 类 号：X837[环境科学与工程—环境工程] O657.1[理学—分析化学]