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

页码：4001 / 4010

页数：10

共 20 条

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