HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Environmental Science / Faculty of Environmental Earth Science >
Peer-reviewed Journal Articles, etc >

Variations in Δ14C of humic substances in the Lake Biwa waters

Files in This Item:
NIMP259-1-552.pdf421.51 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Variations in Δ14C of humic substances in the Lake Biwa waters
Authors: Nagao, S. Browse this author
Kodama, H. Browse this author
Aramaki, T. Browse this author
Fujitake, N. Browse this author
Yonebayashi, K. Browse this author
Keywords: Carbon-14
Humic substances
Lake water
Lake Biwa
Issue Date: Jun-2007
Publisher: Elsevier B.V.
Journal Title: Nuclear Instruments and Methods in Physics Research Section B : Beam Interactions with Materials and Atoms
Volume: 259
Issue: 1
Start Page: 552
End Page: 557
Publisher DOI: 10.1016/j.nimb.2007.01.199
Abstract: 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.
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 長尾 誠也

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University