Concentrations of108mAg,137Cs, and210Pb in oyster (Crassostrea gigas) on the Japanese coast in relation to the distribution and behavior of radionuclides in sea water

Y. Ishikawa, T. Kikuchi, T. Sekine, K. Yoshihara

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Abstract

Concentrations of108mAg,137Cs, and210Pb in oysters (Crassostrea gigas) were measured for about 10 years on the northeast coast of Japan. Silver-108m was detected in oyster samples collected from an open bay, and its concentrations decreased from the initial value of about 30 mBq/kg fresh in the early 1980s to the value of about 10 mBq/kg fresh in the early 1990s. This decrease could be mainly explained by effects of the ocean current in the early 1980s, and the coastal sea water thereafter, as well as by the advection and diffusion in the ocean. In the nearly-closed bays, concentrations of108mAg and210Pb in oysters were remarkably lower than in the open bays. It suggests that scavenging of silver and lead from the sea water effectively occurred in the nearly-closed bays. In contrast, concentrations of137Cs in oysters were similar in the open bays and in the nearly-closed bays.

Original languageEnglish
Pages (from-to)343-355
Number of pages13
JournalJournal of Radioanalytical and Nuclear Chemistry Articles
Volume197
Issue number2
DOIs
Publication statusPublished - 1995 Nov 1

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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