Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 69(10): 315-327 (2020)


環境水の保管温度・期間が溶存態137Cs濃度の変動に及ぼす影響Effect of Storage Temperature and Duration of Environmental Water on Dissolved 137Cs Concentration

1国立環境研究所福島支部National Institute for Environmental Studies

2 農業・食品産業技術総合研究機構東北農業研究センター農業放射線研究センターAgricultural Radiation Research Center, Tohoku Agricultural Research Center, National Agriculture and Food Research Organization

3農業・食品産業技術総合研究機構農村工学研究所National Agriculture and Food Research Organization, Institute for Rural Engineering

受付日:2020年2月7日Received: February 7, 2020
受理日:2020年7月9日Accepted: July 9, 2020
発行日:2020年10月15日Published: October 15, 2020


We examined fluctuations of dissolved 137Cs concentration in the constant temperature storage of unfiltered water samples from forest rivers, urban rivers and agricultural reservoirs. When the water was acidified immediately after sampling, the dissolved 137Cs concentration during the 30-day storage period increased from the in situ concentration. The dissolved 137Cs concentration without acid varied depending on the storage temperature, number of storage days, and the nature of the water. The findings suggest that it is possible to reproduce the in situ dissolved 137Cs concentration by restoring the water temperature to that of the originally sampled water after a short period storage of refrigeration prior to filtration.

Key words: caesium-137; dissolved form; storage temperature; short period storage of refrigeration

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