碳酸肼对乏燃料后处理模拟污溶剂中磷酸二丁酯和Zr（Ⅳ）的洗涤行为研究
Washing behavior of dibutyl phosphate and Zr（Ⅳ）in spent fuel reprocessing simulated contaminated solvents by hydrazine carbonate
王光辉 1何辉 2矫彩山1
作者信息
- 1. 哈尔滨工程大学 核科学与技术学院,黑龙江 哈尔滨 150001
- 2. 哈尔滨工程大学 核科学与技术学院,黑龙江 哈尔滨 150001;中国原子能科学研究院 放射化学研究所,北京 102400
- 折叠
摘要
碳酸肼作为碱性无盐试剂对钚铀氧化还原萃取(PUREX)流程的污溶剂的洗涤有广泛的应用前景.本文使用碳酸肼溶液对 30%磷酸三丁酯-正十二烷有机溶液中的磷酸二丁酯和Zr（Ⅳ）进行洗涤,利用单一变量原则,考察了振荡时间、温度、水相与有机相体积比、碳酸肼质量分数以及磷酸二丁酯质量浓度等因素对去除有机溶液中磷酸二丁酯和Zr（Ⅳ）的影响.结果表明:在 25℃下振荡洗涤 15 min,5%碳酸肼洗涤 3 次同体积的有机溶液后对0.1 g/L和 0.5 g/L的磷酸二丁酯的去除率分别约为 98.7%和 88.1%.此外,磷酸二丁酯的存在可以促进有机相对Zr（Ⅳ）的萃取和保留,当磷酸二丁酯的质量浓度为 0 时,碳酸肼对Zr（Ⅳ）的去除率为 98.5%.
Abstract
Hydrazine carbonate is widely applicable as a basic salt-free reagent for washing contaminated solvents in the plutonium-uranium redox extraction processes.Herein,dibutyl phosphate(HDBP)and Zr（Ⅳ）in 30%TBP-n-dodecane organic solution were washed using a hydrazine carbonate solution.The effects of oscillation time,tem-perature,the volume ratio of the aqueous phase to the organic phase,the mass fraction of hydrazine carbonate,and the concentration of dibutyl phosphate(HDBP)on the removal percentage of HDBP and Zr（Ⅳ）by hydrazine car-bonate washing were investigated using the principle of a single variable.The results showed that the removal per-centages of HDBP were approximately 98.7%and 88.1%for 0.1 g/L and 0.5 g/L,respectively,after washing the same volume of organic solution thrice with 5%hydrazine carbonate at 25℃with 15 min of oscillation time.Moreover,the presence of HDBP promoted organic relative Zr（Ⅳ）extraction and retention.In addition,the re-moval of Zr（Ⅳ）by hydrazine carbonate was 98.5%in the absence of HDBP.
关键词
碳酸肼/磷酸二丁酯/Zr（Ⅳ）/去除率/金属保留/洗涤/萃取/无盐试剂Key words
hydrazine carbonate/dibutyl phosphate(HDBP)/Zr（Ⅳ）/removal percentage/metal retention/washing/extraction/salt-free reagent引用本文复制引用
基金项目
国家自然科学基金核技术创新联合基金(U1967219)
出版年
2024
国家科技期刊平台
NSTL
万方数据