Application of novel extractants for actinide(III)/ lanthanide(III) separation in hollow-fibre modules |
| |
Authors: | Andreas Geist Michael Weigl Udo Müllich Klaus Gompper |
| |
Affiliation: | Forschungszentrum Karlsruhe, Institut für Nukleare Entsorgung, Karlsruhe, Germany |
| |
Abstract: | Separation tests using hollow-fibre modules were performed for the difficult selective extraction of trivalent actinides over fission lanthanides from acidic media. This article shows that with 2,6-di(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine as the extractant, up to 94% americium could be extracted from 1.0 kmol/m3 HNO3, with minimal lanthanide co-extraction. Using a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid and tri-n-octyl phosphine oxide, tests were performed on extraction, lanthanide scrubbing and stripping. In the extraction test, up to 99.99% americium could be extracted from 0.5 kmol/m3 HNO3, with approximately one third of the lanthanides being co-extracted. Mass transfer calculations using a consistent set of input data showed good agreement with the experiments. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|