First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture

Abstract A part of the radiocaesium from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was emitted as glassy, water-resistant caesium-bearing microparticles (CsMPs). Here, we isolated and investigated seven CsMPs from marine particulate matter and sediment. From the elemental compositio...

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Autores principales:	Hikaru Miura, Takashi Ishimaru, Yukari Ito, Yuichi Kurihara, Shigeyoshi Otosaka, Aya Sakaguchi, Kazuhiro Misumi, Daisuke Tsumune, Atsushi Kubo, Shogo Higaki, Jota Kanda, Yoshio Takahashi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c5bda13fe0cb4966911e481315e7d766
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spelling	oai:doaj.org-article:c5bda13fe0cb4966911e481315e7d7662021-12-02T13:20:21ZFirst isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture10.1038/s41598-021-85085-w2045-2322https://doaj.org/article/c5bda13fe0cb4966911e481315e7d7662021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-85085-whttps://doaj.org/toc/2045-2322Abstract A part of the radiocaesium from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was emitted as glassy, water-resistant caesium-bearing microparticles (CsMPs). Here, we isolated and investigated seven CsMPs from marine particulate matter and sediment. From the elemental composition, the 134Cs/137Cs activity ratio, and the 137Cs activity per unit volume results, we inferred that the five CsMPs collected from particulate matter were emitted from Unit 2 of the FDNPP, whereas the two CsMPs collected from marine sediment were possibly emitted from Unit 3, as suggested by (i) the presence of calcium and absence of zinc and (ii) the direction of the atmospheric plume during the radionuclide emission event from Unit 3. The presence of CsMPs can cause overestimation of the solid–water distribution coefficient of Cs in marine sediments and particulate matter and a high apparent radiocaesium concentration factor for marine biota. CsMPs emitted from Unit 2, which were collected from the estuary of a river that flowed through a highly contaminated area, may have been deposited on land and then transported by the river. By contrast, CsMPs emitted from Unit 3 were possibly transported eastward by the wind and deposited directly onto the ocean surface.Hikaru MiuraTakashi IshimaruYukari ItoYuichi KuriharaShigeyoshi OtosakaAya SakaguchiKazuhiro MisumiDaisuke TsumuneAtsushi KuboShogo HigakiJota KandaYoshio TakahashiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hikaru Miura Takashi Ishimaru Yukari Ito Yuichi Kurihara Shigeyoshi Otosaka Aya Sakaguchi Kazuhiro Misumi Daisuke Tsumune Atsushi Kubo Shogo Higaki Jota Kanda Yoshio Takahashi First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture
description	Abstract A part of the radiocaesium from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident was emitted as glassy, water-resistant caesium-bearing microparticles (CsMPs). Here, we isolated and investigated seven CsMPs from marine particulate matter and sediment. From the elemental composition, the 134Cs/137Cs activity ratio, and the 137Cs activity per unit volume results, we inferred that the five CsMPs collected from particulate matter were emitted from Unit 2 of the FDNPP, whereas the two CsMPs collected from marine sediment were possibly emitted from Unit 3, as suggested by (i) the presence of calcium and absence of zinc and (ii) the direction of the atmospheric plume during the radionuclide emission event from Unit 3. The presence of CsMPs can cause overestimation of the solid–water distribution coefficient of Cs in marine sediments and particulate matter and a high apparent radiocaesium concentration factor for marine biota. CsMPs emitted from Unit 2, which were collected from the estuary of a river that flowed through a highly contaminated area, may have been deposited on land and then transported by the river. By contrast, CsMPs emitted from Unit 3 were possibly transported eastward by the wind and deposited directly onto the ocean surface.
format	article
author	Hikaru Miura Takashi Ishimaru Yukari Ito Yuichi Kurihara Shigeyoshi Otosaka Aya Sakaguchi Kazuhiro Misumi Daisuke Tsumune Atsushi Kubo Shogo Higaki Jota Kanda Yoshio Takahashi
author_facet	Hikaru Miura Takashi Ishimaru Yukari Ito Yuichi Kurihara Shigeyoshi Otosaka Aya Sakaguchi Kazuhiro Misumi Daisuke Tsumune Atsushi Kubo Shogo Higaki Jota Kanda Yoshio Takahashi
author_sort	Hikaru Miura
title	First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture
title_short	First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture
title_full	First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture
title_fullStr	First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture
title_full_unstemmed	First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture
title_sort	first isolation and analysis of caesium-bearing microparticles from marine samples in the pacific coastal area near fukushima prefecture
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c5bda13fe0cb4966911e481315e7d766
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First isolation and analysis of caesium-bearing microparticles from marine samples in the Pacific coastal area near Fukushima Prefecture

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