Speciation of cesium in tree tissues and its implication for uptake and translocation of radiocesium in tree bodies

Tanaka, Kazuya ; Kanasashi, Tsutomu*; Takenaka, Chisato*; Takahashi, Yoshio*

In this study, we investigated coordination structures of Cs in $^{133}$ Cs-doped bark, sapwood, heartwood, needle, and branch samples of trees collected in Fukushima by extended X-ray absorption fine structure (EXAFS) spectroscopy. We examined four representative tree species in Fukushima, , , , and . EXAFS spectra suggested that Cs was adsorbed as an outer-sphere complex on all parts of the four species, with electrostatic binding to negatively charged functional groups in components of tree tissues. These results were supported by extraction experiments where most of the sorbed Cs was desorbed from all parts of each tree species using 1 M CH $_{3}$ COONH $_{4}$ .

Language	:	English
Journal	:	Science of the Total Environment
Volume	:	755
Number	:	Part 2
Pages	:	p.142598_1 - 142598_8
Publication Year/Month	:	2021/02
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Paper URL	:	https://doi.org/10.1016/j.scitotenv.2020.142598 Read or search this article
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Keywords	:	セシウム; EXAFS; 森林; 福島; 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
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Article of JAEA R&D Review	:	Speciation of Cs in Tree Tissues; Elucidation of the Mobility of Cs inside Trees Using Synchrotron Radiation [/]
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Registration No. : AA20200575
JAEA Abstracts No. : 49000059
Paper Submission No. : 23688

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