Decontamination of Radioactive Cesium from Sea Sludge Using Microbial Activity

Hirosuke Hirano; Nobuyuki Nishimiya; Yoshiyuki Kojima; Takeshi Toyama; Tetsuo Umegaki; Kyoichi Okamoto

doi:10.4028/www.scientific.net/KEM.617.117

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 617Decontamination of Radioactive Cesium from Sea...

Decontamination of Radioactive Cesium from Sea Sludge Using Microbial Activity

Abstract:

Fukushima nuclear power plant was destroyed by tsunami of the Great East Japan earthquake, and radioactive cesium was widely scattered from there. Further, highly concentrated radioactive cesium was found in the bottom of the sea sludge of Tokyo Bay, where the cesium concentration is 1.513 times as high as usual. However, the decontamination method of the bottom of the sea sludge is not yet established. Therefore, the authors proposed to decontaminate cesium from the sea sludge under an anaerobic condition, referenced from a previous study. Sludge and cesium nitrate were mixed with a wet weight ratio of 0.3 wt% for cesium nitrate to form a model mixture, and immersed in 6 dm³ of deionized water and kept for 10 days. As a result, the author found terms that is able to decrease amount of cesium in the sludge. However we found this term was not anaerobic condition from after research, finally found difficult to decreased cesium in the sludge without aerobic condition.

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Periodical:

Key Engineering Materials (Volume 617)

Pages:

117-120

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.617.117

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Online since:

June 2014

Authors:

Hirosuke Hirano*, Nobuyuki Nishimiya, Yoshiyuki Kojima, Takeshi Toyama, Tetsuo Umegaki, Kyoichi Okamoto

Keywords:

Anaerobic Condition, Cesium Decontamination, Microbial Activity, Sea Sludge

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* - Corresponding Author

References

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DOI: 10.21660/2016.21.5265

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