Evaluation of the readsorption of plutonium and americium in dynamic fractionations of environmental solid samples

Roongrat Petersen, Xiaolin Hou, Elo Harald Hansen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A dynamic extraction system exploiting sequential injection (SI) for sequential extractions incorporating a specially designed extraction column is developed to fractionate radionuclides in environmental solid samples such as soils and sediments. The extraction column can contain a large amount of soil sample (up to 5 g), and under optimal operational conditions it does not give rise to creation of back pressure. Attention has been placed on studies of the readsorption problems during sequential extraction using a modified Standards, Measurements and Testing (SM&T) scheme with 4-step sequential extractions. The degree of readsorption in dynamic and conventional batch extraction systems are compared and evaluated by using a double-spiking technique. A high degree of readsorption of plutonium and americium (>75%) was observed in both systems, and they also exhibited similar distribution patterns of the two radionuclides. However, the dynamic system is fully automated, eliminates manual separations, significantly reduces the operational time required, and offers detailed kinetic information.
Original languageEnglish
JournalJournal of Environmental Radioactivity
Volume99
Issue number7
Pages (from-to)1165-1174
ISSN0265-931X
DOIs
Publication statusPublished - 2008

Keywords

  • Soil
  • Readsorption
  • Plutonium
  • Fractionation
  • Dynamic fractionation system
  • Americium
  • Sequential extraction

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