Journal
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
Volume 139, Issue -, Pages 370-378Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jenvrad.2014.08.021
Keywords
Fukushima Daiichi NPP accident; River water; Radiocesium; Inventory; Solid/liquid distribution coefficient
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Funding
- Ministry of Education, Culture, Sports, Science and Technology
- Grants-in-Aid for Scientific Research [24110001, 26257501, 24110008] Funding Source: KAKEN
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An extensive investigation of particulate radiocaesium in suspended solids and dissolved radiocaesium in river water was undertaken at 30 sites in Fukushima and Miyagi Prefectures in December 2012, and their relationships with catchment inventory and the solid/liquid distribution coefficient (K-d) were evaluated. Rivers located in the coastal region on the north side of the Fukushima Dai-ichi Nuclear Power Plant exhibited relatively higher particulate radiocaesium concentrations. Significant correlations were found between concentrations of particulate/dissolved radiocaesium and average catchment inventories, indicating that the concentrations of particulate/dissolved radiocaesium could be approximated from the catchment inventory. Particulate radiocaesium concentration was significantly correlated with dissolved radiocaesium concentration (with the exception of concentrations measured in estuaries), and the geometric mean K-d was calculated as 3.6 x 10(5) with a 95% confidence interval of 2.6-5.1 x 10(5). (C) 2014 Elsevier Ltd. All rights reserved.
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