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Journal Articles

Remobilisation of radiocaesium from bottom sediments to water column in reservoirs in Fukushima, Japan

Funaki, Hironori; Tsuji, Hideki*; Nakanishi, Takahiro; Yoshimura, Kazuya; Sakuma, Kazuyuki; Hayashi, Seiji*

Science of the Total Environment, 812, p.152534_1 - 152534_10, 2022/03

https://doi.org/10.1016/j.scitotenv.2021.152534
 Times Cited Count：13 Percentile：60.65(Environmental Sciences)

Reservoir sediments generally act as a sink for radionuclides derived from nuclear accidents, but under anaerobic conditions, several radionuclides remobilise in bioavailable form from sediment to water columns, which may contribute to a long-term contamination in aquatic products. This study systematically investigated the $$^{137}$$Cs activities between sediment and pore water, which is a direct evidence of the remobilisation of bioavailable $$^{137}$$Cs from sediments, in two highly contaminated reservoirs affected by the Fukushima Dai-ichi Nuclear Power Plant accident. Our results strongly indicate a competitive ion exchange process between $$^{137}$$Cs and NH$$_{4}$$ via a highly selective interaction with the frayed edges sites of phyllosilicate minerals to be the major reason for the variability of the Kd values between sediment and pore water, even in the Fukushima case.

JAEA Reports

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Kawamura, Kazuo*; Nakajima, Tatsuya*; Tomori, Masahiko*

PNC TJ7361 93-004, 91 Pages, 1993/03

PNC-TJ7361-93-004.pdf:8.99MB

no abstracts in English

Oral presentation

Long-term assessment of transport of radioactive contaminant in the environment of Fukushima (F-TRACE Project), 10; Transport and accumulation behavior of radioactive cesium in reservoir system

Funaki, Hironori; Iri, Shatei; Oda, Yoshihiro

no journal, , 

no abstracts in English

Oral presentation

Time-dependency of $$^{137}$$Cs doncentration in the reservoir system

Funaki, Hironori; Yoshimura, Kazuya; Sakuma, Kazuyuki; Narita, Tetsuya

no journal, , 

no abstracts in English

Oral presentation

Long-term assessment of transport of radioactive contaminant in the environment of Fukushima (F-TRACE project), 19; Transport and accumulation behavior of radioactive cesium in reservoir system

Funaki, Hironori; Yoshimura, Kazuya; Sakuma, Kazuyuki; Narita, Tetsuya

no journal, , 

no abstracts in English

Oral presentation

Remobilization mechanism of radiocesium from bottom sediments in reservoir

Funaki, Hironori; Nakanishi, Takahiro; Yoshimura, Kazuya; Sakuma, Kazuyuki; Tsuji, Hideki*; Hayashi, Seiji*

no journal, , 

Reservoir sediments generally act as a sink for radionuclides derived from nuclear accidents, but under anaerobic conditions, several radionuclides remobilize in bioavailable form from sediments to water columns, which may contribute to the long-term contamination of aquatic products. This study systematically investigated the $$^{137}$$Cs activities of sediment and pore water, providing a direct evidence of the remobilization of bioavailable $$^{137}$$Cs from sediments in a highly contaminated reservoir (Ogaki Dam Reservoir) affected by the Fukushima Dai-ichi Nuclear Power Station accident.

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