Low levels of .sup.134Cs in suspended solids in rivers discharging into the Sea of Japan

Low levels of .sup.134Cs in suspended solids in rivers discharging into the Sea of Japan

We investigated radiocesium concentrations in the suspended solids (SS) of two large rivers discharging into the Sea of Japan. Higher .sup.134Cs concentrations in SS sampled from upstream area in 2013 (711 Bq/kg-SS) reflected the larger effect of radioactive depositions in western Fukushima Prefectu...

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Veröffentlicht in:Journal of radioanalytical and nuclear chemistry 2018-06, Vol.316 (3), p.1233
Hauptverfasser: Inoue, Mutsuo, Yoneoka, Shuichiro, Ochiai, Shinya, Morokado, Toshiki, Uemura, Hiroaki, Nagao, Seiya
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Rivers
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container_issue 3
container_start_page 1233
container_title Journal of radioanalytical and nuclear chemistry
container_volume 316
creator Inoue, Mutsuo
Yoneoka, Shuichiro
Ochiai, Shinya
Morokado, Toshiki
Uemura, Hiroaki
Nagao, Seiya
description We investigated radiocesium concentrations in the suspended solids (SS) of two large rivers discharging into the Sea of Japan. Higher .sup.134Cs concentrations in SS sampled from upstream area in 2013 (711 Bq/kg-SS) reflected the larger effect of radioactive depositions in western Fukushima Prefecture. However, smaller but less variable concentrations in downstream areas (< 100 Bq/kg-SS) indicated a continual supply of .sup.134Cs-contaminated SS from 2013 to 2017. The particulate .sup.134Cs concentrations in normal flow conditions were at approximately similar levels with those in coastal waters (< ~1 mBq/L), suggesting that the impact of SS on the Sea of Japan was negligible after 2013.
doi_str_mv 10.1007/s10967-018-5783-7
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title Low levels of .sup.134Cs in suspended solids in rivers discharging into the Sea of Japan
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