Rapid measurement of radiocesium in water using a Prussian blue impregnated nonwoven fabric

Tetsuo Yasutaka, Tohru Kawamoto, Yoshishige Kawabe, Toshio Sato, Mutsuto Sato, Yasukazu Suzuki, Kimihito Nakamura, Takeshi Komai

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

We developed a rapid method for concentrating and measuring radiocesium (134Cs and 137Cs) dissolved in fresh water using nonwoven fabric impregnated with Prussian blue (PB) as a radiocesium absorber in combination with gamma-ray spectrometry using a germanium (Ge) detector. Utilizing this method, dissolved radiocesium in a 20-100 L freshwater sample could be concentrated within a period of 20-60 min by passing the sample through 10-12 columns, connected in series, that had been fitted with nonwoven fabric disks impregnated with PB. Laboratory tests using water samples containing known amounts of radiocesium confirmed that the overall recovery rate of the isotope was 100%-108%, and that the first six columns recovered 84%-97% of the isotope. The detection limit of this method was determined to be 0.002 Bq/L with a sample of 100 L and measurement time of 43,200 s. In comparison with traditional methods using ion-exchange resin, co-precipitation with ammonium phosphomolybdate, etc., our method has the advantages of reduced cost and a significantly shorter concentration time. Since water samples can be treated in short periods of time, it is now possible to conduct radiocesium pre-concentration in situ, thus eliminating the need to transport large-volume water samples to laboratories.

Original languageEnglish
Pages (from-to)674-681
Number of pages8
Journaljournal of nuclear science and technology
Volume50
Issue number7
DOIs
Publication statusPublished - 2013 Jul 1
Externally publishedYes

Keywords

  • Prussian blue
  • adsorption
  • cesium
  • cesium-137
  • environmental monitoring
  • nonwoven fabric
  • pre-concentration
  • radioactive contamination
  • river
  • water

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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