Variations in Δ14C of humic substances in the Lake Biwa waters

Nagao, S.; Kodama, H.; Aramaki, T. et al.

Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms, 2007, 259(1), 552-557

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アクセス権
open access
URI
https://hdl.handle.net/2115/28633
タイトル
Variations in Δ14C of humic substances in the Lake Biwa waters
著者
Nagao, S. ; Kodama, H. ; Aramaki, T. ; Fujitake, N. ; Yonebayashi, K.
著者名
Nagao, S.
著者名
Kodama, H.
著者名
Aramaki, T.
著者名
Fujitake, N.
著者名
Yonebayashi, K.
言語
英語
キーワード
Carbon-14
Humic substances
Lake water
Lake Biwa
δ13C
発行日
2007-06
出版者
Elsevier B.V.
収録物名
Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms
巻(号)
259(1)
ページ
552-557
抄録
Carbon isotopes (13C and 14C) were used to study the characteristics and origin of humic substances in water samples from Lake Biwa in Japan. Humic substances were isolated from surface lake waters in each season by the XAD extraction method and their carbon isotopic ratios were measured by accelerator mass spectrometry. The Δ14C values of Biwa humic and fulvic acids indicate that these substances consist mainly of pre-bomb 14C. There is a negative correlation between Δ14C and δ13C values for the Biwa fulvic acids. The fulvic acid consists of younger organic materials with lower δ13C value in January, but older organics with higher δ13C in April and October. The major part of fulvic acid may be supplied from soil solution and/or groundwater in the watershed and their contribution varies with season.
資源タイプ
学術雑誌論文
出版タイプ
Accepted Manuscript
PISSN
0168-583X
関連情報
URI
http://www.sciencedirect.com/science/journal/0168583X
関連情報 (isVersionOf)
出版社版DOI
https://doi.org/10.1016/j.nimb.2007.01.199