Intake of Radionuclides in the Trees of Fukushima Forests 3. Removal of Radiocesium from Stem Wood, Cryptomeria Japonica (L.f.) D. Don

Nuclear power plant accidents have dispersed radiocesium into the atmosphere to contaminate trees with no turnover in heartwood, as occurred in Fukushima, and as has persisted for over 30 years around Chernobyl. Here we employ the ponding method, in which radiocesium can be flushed out from the cros...

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Bibliographic Details
Published in:Forests 2020-05, Vol.11 (5), p.589
Main Authors: Seyama, Tomoko, Arakawa, Ryohei, Machida, Shogo, Yoshida, Sota, Maru, Akihiko, Baba, Kei’ichi, Kobayashi, Yoshinori, Kaida, Rumi, Taji, Teruaki, Sakata, Yoichi, Iijima, Tomoaki, Hayashi, Takahisa
Format: Article
Language:English
Subjects:
Air pollution
Biomass energy
Biotechnology
Cellulose
Cryptomeria japonica
Enzymes
Forests
Japanese cedar
Nuclear accidents
Nuclear accidents & safety
Nuclear energy
Nuclear power plants
pit membrane
Ponding
ponding method
Potassium
radiocesium removal
Radioisotopes
Sodium
Stems
tracheid
Trees
Viscosity
Wood
Xyloglucan
Xyloglucanase
Zeolites
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Summary:Nuclear power plant accidents have dispersed radiocesium into the atmosphere to contaminate trees with no turnover in heartwood, as occurred in Fukushima, and as has persisted for over 30 years around Chernobyl. Here we employ the ponding method, in which radiocesium can be flushed out from the cross-cut edges of Japanese cedar, Cryptomeria japonica (L.f.) D. Don., stem with water due to xyloglucan degradation in tracheids. Furthermore, lab-scale ponding experiments have shown that a non-detectable level of radiocesium has been observed not only in the pool water used for 575 days but also in the water containing recombinant xyloglucanase. This traditional technology is now a new biotechnology.
ISSN:1999-4907
1999-4907
DOI:10.3390/f11050589