Estimation of soil-to-plant transfer factors of radiocesium in 99 wild plant species grown in arable lands 1 year after the Fukushima 1 Nuclear Power Plant accident

Jun Yamashita, Takashi Enomoto, Masao Yamada, Toshiro Ono, Tadashi Hanafusa, Tomohiro Nagamatsu, Shoji Sonoda, Yoko Yamamoto

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25 Citations (Scopus)

Abstract

One year after the deposition of radionuclides from the Fukushima 1 Nuclear Power Plant (A formal name is Fukushima Daiichi Nuclear Power Station) in March 2011, radiocesium (134Cs, 137Cs) concentrations ([Cs]) were comprehensively investigated in the wild plants of 99 species most of which were annual or summer green perennial herbs and started to grow from April 2012 at the heavily contaminated fields of paddy (three study sites) and upland (one study site) in Fukushima Prefecture. The survey was conducted three times (April, July and October) in the year. In each site, soils (soil cores of 5-cm depth) and plants (aerial shoots) were collected for determination of [Cs] on a dry weight basis, and then the transfer factor (TF) of radiocesium from soil to plant ([Cs]plant/[Cs]soil) was estimated in each species. The [Cs] values of both soils and plants largely varied. However, some species exhibited relatively high TF values (more than 0.4) (e.g., Athyrium yokoscense, Dryopteris tokyoensis, and Cyperus brevifolius), while others exhibited almost negligible values (less than 0.01) (e.g., Salix miyabeana, Humulus scandens, and Elymus tsukushiensis). In addition, judging from the 11 species grown in both paddy and upland fields, TF values were generally higher in the paddy fields. The estimation of phytoextraction efficiency of soil radiocesium by weed communities in the paddy fields suggests that the weed community is not a practical candidate for phytoremediation technique.

Original languageEnglish
Pages (from-to)11-22
Number of pages12
JournalJournal of Plant Research
Volume127
Issue number1
DOIs
Publication statusPublished - Jan 2014

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Keywords

  • Arable lands
  • Fukushima 1 Nuclear Power Plant accident
  • Phytoremediation
  • Radiocesium
  • Transfer factor
  • Weed management

ASJC Scopus subject areas

  • Plant Science

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