Radioactive cesium accumulation in seaweeds by the Fukushima 1 Nuclear Power Plant accident-two years' monitoring at Iwaki and its vicinity

Hiroshi Kawai, Akira Kitamura, Mari Mimura, Tetsuro Mimura, Tomoya Tahara, Daiki Aida, Kenji Sato, Hideaki Sasaki

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

Accumulations of radionuclides in marine macroalgae (seaweeds) resulting from the Fukushima 1 Nuclear Power Plant (F1NPP) accident in March 2011 have been monitored for two years using high-purity germanium detectors. Algal specimens were collected seasonally by snorkeling at Nagasaki, Iwaki, Fukushima Prefecture (Pref.), Japan, ca. 50 km perimeter from the F1NPP. Additional collections were done at Soma, Hironocho, Hisanohama and Shioyazaki in Fukushima Pref. as well as at Chiba Pref. and Hyogo Pref. as controls. In May 2011, specimens of most macroalgal species showed 137Cs levels greater than 3,000 Bq kg-1 at Shioyazaki and Nagasaki. The highest 137Cs level recorded 7371.20 ± 173.95 Bq kg-1 in Undaria pinnatifida (Harvey) Suringar on 2 May 2011, whereas seawater collected at the same time at Shioyazaki and Nagasaki measured 8.41 ± 3.21 and 9.74 ± 3.43 Bq L-1, respectively. The concentration factor of marine macroalgae was estimated to be ca. 8-50, depending on taxa and considering a weight ratio of wet/dry samples of ca. 10. 137Cs level declined remarkably during the following 5-6 months. In contrast, the 137Cs level remained rather stable during the following 12-16 months, and maintained the range of 10-110 Bq kg-1. Contamination was still detectable in many samples in March 2013, 24 months after the most significant pollution.

原文English
頁(從 - 到)23-42
頁數20
期刊Journal of Plant Research
127
發行號1
DOIs
出版狀態Published - 2014 1月

All Science Journal Classification (ASJC) codes

  • 植物科學

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