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Variation of radiocaesium in seawater and sediment around off Fukushima
https://repo.qst.go.jp/records/85058
https://repo.qst.go.jp/records/85058c58be08b-59c8-4171-a9f7-74ebcde1044f
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-01-13 | |||||
| タイトル | ||||||
| タイトル | Variation of radiocaesium in seawater and sediment around off Fukushima | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Tatsuo, Aono
× Tatsuo, Aono× Nishikawa, Jun× Otosaka, Shigeyoshi× Hyoe, Takata× Misonou, Toshiharu× Nakanishi, Takahiro× Miura, Hikaru× Miho, Fukuda× Shota, Kambayashi× Masanobu, Sakurada× Hiroyuki, Takahashi× Shinnosuke, Yamazaki× Tatsuo, Aono× Hyoe, Takata× Miho, Fukuda× Shota, Kambayashi× Masanobu, Sakurada× Hiroyuki, Takahashi× Shinnosuke, Yamazaki |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | From 2016 to 2020, the Tohoku Marine Ecosystem Research Vessel Shinsei-maru conducted four research cruises on the dynamics and bioavailability of radionuclides around off Fukushima. Seawater, sediments and organisms were collected mainly around off the Fukushima Daiichi Nuclear Power Plant (FDNPS). The purpose of those cruises is to observe the flux of radionuclides released into the ocean by the FDNPS accident and to understand the bioavailability of radionuclides. In order to understand the contaminated levels of the marine environment, the concentration of radioactive cesium (Cs) in seawater and sediments around off Fukushima was investigated. As a result, the concentration range of dissolved Cs-137 in the surface seawater near the FDNPS from 2016 to 2018 was 10-23 mBq/L, but decreased to 7 mBq/L in 2020. In terms of points, the concentrations of dissolved Cs-137 tended to decrease with time. On the other hand, in sediments, the Cs-137 concentrations were higher in the surface layer (0-2 cm) than the deep layer from 2016 to 2017 and tended to decrease with depth, but after 2018, subsurface vertical maximum of Cs-137 concentrations was observed at some stations. Although these concentrations tended to increase in the subsurface layer, the concentrations in the sediment also tended to decrease with time. In this presentation, we report on the concentration variation of Cs-137 and their characteristics in seawater and sediments around off Fukushima. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 福島大学環境放射能研究所第8回成果報告会 | |||||
| 発表年月日 | ||||||
| 日付 | 2022-02-28 | |||||
| 日付タイプ | Issued | |||||
