Development of a new flowsheet for partitioning of long-lived radionuclides from high-level wastes: the "CRAMEX" process

被引：4
作者：
Tkachenko, Lyudmila [1 ]
Kenf, Ekaterina [1 ]
Babain, Vasiliy [2 ]
Alyapyshev, Mikhail [2 ]
机构：
[1] Khlopin Radium Inst, Dept Appl Radiochem, 28 2nd Murinskiy Pr, St Petersburg 194021, Russia
[2] ITMO Univ, 49 Kronverksky Pr, St Petersburg 197101, Russia
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2022年 / 331卷 / 09期
关键词：
TODGA; Crown ethers; PUREX process raffinate; Extraction; Cesium; Strontium; Actinides; Lanthanides; Polar fluorinated diluents; SOLVENT-EXTRACTION; NITRIC-ACID; METAL-IONS; ACTINIDES; STRONTIUM; SEPARATION; TODGA; DIGLYCOLAMIDES; RAFFINATE; CESIUM;
D O I：
10.1007/s10967-022-08453-4
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A flowsheet for a novel CRAMEX (crown ether and amide for the extraction) process has been developed. The solvent system proposed is a combination of 0.3 M N,N,N ',N '-tetraoctyl diglycolamide (TODGA) and 0.2 M dibenzo-21-crown-7 (DB21C7) in polar fluorinated diluents that co-extracted cesium, strontium, actinides and lanthanides. The stripping of cesium and strontium from the loaded organic phase can be carried out with diluted nitric acid solutions (< 0.1 M HNO3). A mixture of 0.5 M methylamine carbonate and 10 g/l DTPA provides stripping of actinides and lanthanides.
引用
收藏
页码：4001 / 4010
页数：10
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