Supercritical water pretreatment method for analysis of strontium and uranium in soil (Andosols)

Mika Nagaoka, Hiroki Fujita, Taku Michael Aida, Haixin Guo, Richard Lee Smith

Research output: Contribution to journalArticlepeer-review

Abstract

Hydrothermal pretreatment of soils (Andosols) from Ibaraki prefecture (Japan) was used to improve methods for monitoring radioactive Sr and U. Calcined samples were pretreated with subcritical or supercritical water (SCW) followed by extraction with 0.5 M HNO3 solutions. With SCW pretreatment, recoveries of Sr and U were 70% and 40%, respectively. Experimental recoveries obtained can be described by a linear relationship in water density. The proposed method is robust and can lower environmental burden of routine analytical protocols.

Original languageEnglish
Article number109465
JournalApplied Radiation and Isotopes
Volume168
DOIs
Publication statusPublished - 2021 Feb

Keywords

  • Analytical methods
  • Hydrothermal pretreatment
  • Soil monitoring
  • Strontium
  • Uranium

ASJC Scopus subject areas

  • Radiation

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