Journal
ENVIRONMENTAL POLLUTION
Volume 187, Issue -, Pages 112-115Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2014.01.002
Keywords
Agricultural field; Nuclear power plant; Radiation contamination; Rana (Pelophylax) porosa poros; Wetland
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Funding
- Environmental Research Fund of the Ministry of the Environment, Japan [ZD-1202]
- Japan Society for the Promotion of Science [24248058]
- Fukushima Radiation Monitoring of Water, Soil and Entrainment of Ministry of Education, Culture, Sports, Science & Technology in Japan
- Grants-in-Aid for Scientific Research [24110006, 24110001] Funding Source: KAKEN
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We investigated the biological accumulation of radiocesium in tadpoles [Rana (Pelophylax)porosa porosa] in rice paddies with and without decontamination practice at Fukushima. Radiocesium was accumulated in surface part of soils both in the control and decontaminated paddies one year after decontamination. Mean Cs-134 and Cs-137 concentrations in tadpoles in the control and decontaminated paddies were 3000 and 4500, and 600 and 890 Bq/kg dry weight, respectively. Radiocesium concentrations in surface soil (0-5 cm depth) and tadpoles in the decontaminated paddy were five times smaller than in the control paddy. These results suggest that decontamination practice can reduce radiocesium concentrations in both soil and tadpoles. However, at the decontaminated paddy, radiocesium concentrations in surface soils became 3.8 times greater one year after decontamination, which indicates that monitoring the subsequent movement of radiocesium in rice paddies and surrounding areas is essential for examining contamination propagation. (C) 2014 Elsevier Ltd. All rights reserved.
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