Synergistic Enhancement of the Extraction of Trivalent Lanthanides and Actinides by Tetra-(n-Octyl)DiglycoIamide from Chloride Media

摘要

This work describes a unique synergistic enhancement of the extraction of trivalent actinides and lanthanides by extraction chromatographic resins containing tetra-n-octyldiglycolamide (TODGA) from hydrochloric acid containing anionic metal chlorides.The presence of mg/L quantities of trivalent Fe,Ga,In,Tl,or Bi in HC1 leads to several orders of magnitude enhancement of the extraction of trivalent actinides and lanthanides.The synergistic effect persists,even when the amount of metal chloride exceeds the capacity of the resin.The application of this synergistic enhancement for the separation of actinium from stainless steel and the preconcentra-tion of americium and plutonium from large soil samples will be described.