Influence of microorganisms on the behavior of technetium and other elements in paddy soil surface water

Nobuyoshi Ishii, Keiko Tagami, Shuichi Enomoto, Shigeo Uchida

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Insolubilization patterns of technetium (Tc) and other trace elements (Sc, Co, Zn, Se, Rb, Sr, Y, Nb, Ce, Pm, Gd, Lu, Hf, and Re) in surface water covering paddy fields were compared to gain insight into the behavior of Tc in an agricultural environment. The insolubilization of Tc, which did not pass through a 0.2-μm-pore-size filter, was mainly caused by bacteria. Among the 14 other elements investigated, Nb was insolubilized by bacteria and the amounts of insoluble Nb were positively correlated with those of Tc. Although Re is a chemical analog of Tc, no similarity was observed. These results suggest that Tc behaves similarly to Nb in the insolubilization in surface water covering paddy fields.

Original languageEnglish
Pages (from-to)369-380
Number of pages12
JournalJournal of Environmental Radioactivity
Issue number3
Publication statusPublished - 2004
Externally publishedYes



  • Bacteria
  • Multitracer
  • Paddy soil surface water
  • Technetium

ASJC Scopus subject areas

  • Environmental Science(all)

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