Variability of K-40 isotopic composition in forest soils under different environmental conditions

Fujiyoshi, Ryoko; Takekoshi, Naoki; Okamoto, Kazumasa

Journal of Radioanalytical and Nuclear Chemistry, 2014, 299(3), 1365-1371

Permalink : https://hdl.handle.net/2115/56346

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アクセス権
open access
URI
https://hdl.handle.net/2115/56346
タイトル
Variability of K-40 isotopic composition in forest soils under different environmental conditions
著者
Fujiyoshi, Ryoko ; Takekoshi, Naoki ; Okamoto, Kazumasa
e-Rad_Researcher
70229061
著者名
Fujiyoshi, Ryoko
著者名
Takekoshi, Naoki
著者名
Okamoto, Kazumasa
言語
英語
キーワード
K-40 isotopic composition
Depth distribution
Carbonaceous soil
Volcanic soil
Soil organic matter
発行日
2014-03
出版者
Springer
収録物名
Journal of Radioanalytical and Nuclear Chemistry
巻(号)
299(3)
ページ
1365-1371
抄録
Radiopotassium isotopic composition (K-40/K, %) of several forest soils did not show a constant value of generally known 1.17 x 10(-2) %, but they were varied significantly from 0.4 x 10(-2) to 1.3 x 10(-2) % at different locations under different environmental conditions. Surface portion of a soil (2-4 cm in depth) gave always lower K-40/ K values compared with those of deeper soil layer (35-40 cm in depth). Ion exchange of K+ with NH4+ did not affects the K-40/K value in any soils, which revealed with chemical leaching experiments in the laboratory. Some plant species showed much lower K-40/K values than those in the surface soil. Possible reasons for varying K-40/K values obtained in this study may result from a dynamic behavior of potassium in soil, probably due to biological activity including root uptake and decomposing soil organic matter by microorganisms in the forest floor.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
0236-5731
NCID
AA11120189
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1007/s10967-013-2797-z