Anion-exchange separation of molybdenum and technetium and of Tungsten and rhenium

Abstract

UCRL-3324The present work was designed to meet a need in radiochemistry for the ready separation of molybdenum and technetium and of tungsten and rhenium.The distribution coefficients for these elements on an anion exchange resin have been determined in hydrochloric and nitric acid solutions of varying concentration. These values were used to determine suitable conditions for sepa"rating these eleme.nts and recovering them in small volumes free of material which would interfere in measuring their activities.

Rhenium in seawater: Confirmation of generally conservative behavior

“…Rhenium was separated from the seawater samples by anion exchange chromatography using two small Teflon columns (e.g., HUFFMAN et al, 1956). Primary separation utilized 200 PL Bio-Rad AGI-X8,100-200 mesh resin, onto which ReO; wasadsorbeddirectly from the spiked, acidified seawater.…”

Mechanism unravelling for highly efficient and selective 99TcO4− sequestration utilising crown ether based solvent system from nuclear liquid waste: experimental and computational investigations

“…À from waste, their real time applications for actual nuclear waste are limited to date. [32][33][34][35][36][37] For the removal of TcO 4 À ions from nuclear waste solution, various crown ethers have been explored. One of the promising candidates for the same is the di-tert-butylcyclohexano-18-crown-6 (di-t-BuCH18C6), which is dissolved in a mixture of Isobar® M and tributyl phosphate (TBP).…”

Removal of technetium-99 from simulated Oak Ridge National Laboratory Newly-Generated Liquid Low-Level Waste

“…For many decades, use of strongly basic anion-exchange resin, such as DowexTM l-XS, has been the benchmark technology for separating technetium from nuclear waste solutions (Huffman, et al, 1956;Roberts, et al, 1962;Kiseleva, et al, 1971;Deacon and Greiner, 1982). Our equilibrium sorption isotherm data (Section 4.2) indicates that this material is a good candidate for use with NGLLLW solution.…”