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Carbon isotope composition of dissolved humic and fulvic acids in the Tokachi River system.
Radiat Prot Dosimetry. 2011 Jul; 146(1-3):322-5.RP

Abstract

This study reports carbon isotopic ratios (Δ(14)C and δ(13)C) of dissolved humic and fulvic acids in the Tokachi River system, northern Japan. These acids have a refractory feature and they represent the largest fraction of dissolved organic matter in aquatic environments. The acids were isolated using the XAD extraction method from river water samples collected at three sites (on the upper and lower Tokachi River, and from one of its tributaries) in June 2004 and 2005. δ(13)C values were -27.8 to -26.9 ‰ for humic and fulvic acids. On the other hand, the Δ(14)C values ranged from -247 to +26 ‰ and the average values were -170 ± 79 ‰ for humic acid and -44 ± 73 ‰ for fulvic acid. The difference was attributed to the residence time of fulvic acid in the watershed being shorter than that of humic acid. The large variation suggested that humic substances have a different pathway in each watershed environment.

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Authors+Show Affiliations

Nagao S
Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Wake, Nomi, Ishikawa 923-1224, Japan. nagao37@staff.kanazawa-u.ac.jp
Kodama H
No affiliation info available
Aramaki T
No affiliation info available
Fujitake N
No affiliation info available
Uchida M
No affiliation info available
Shibata Y
No affiliation info available

MeSH

BenzopyransCarbon IsotopesEnvironmental MonitoringHumic SubstancesRivers

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21515623

Citation

Nagao, Seiya, et al. "Carbon Isotope Composition of Dissolved Humic and Fulvic Acids in the Tokachi River System." Radiation Protection Dosimetry, vol. 146, no. 1-3, 2011, pp. 322-5.
Nagao S, Kodama H, Aramaki T, et al. Carbon isotope composition of dissolved humic and fulvic acids in the Tokachi River system. Radiat Prot Dosimetry. 2011;146(1-3):322-5.
Nagao, S., Kodama, H., Aramaki, T., Fujitake, N., Uchida, M., & Shibata, Y. (2011). Carbon isotope composition of dissolved humic and fulvic acids in the Tokachi River system. Radiation Protection Dosimetry, 146(1-3), 322-5. https://doi.org/10.1093/rpd/ncr180
Nagao S, et al. Carbon Isotope Composition of Dissolved Humic and Fulvic Acids in the Tokachi River System. Radiat Prot Dosimetry. 2011;146(1-3):322-5. PubMed PMID: 21515623.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Carbon isotope composition of dissolved humic and fulvic acids in the Tokachi River system. AU - Nagao,Seiya, AU - Kodama,Hiroki, AU - Aramaki,Takafumi, AU - Fujitake,Nobuhide, AU - Uchida,Masao, AU - Shibata,Yasuyuki, Y1 - 2011/04/22/ PY - 2011/4/26/entrez PY - 2011/4/26/pubmed PY - 2011/11/9/medline SP - 322 EP - 5 JF - Radiation protection dosimetry JO - Radiat Prot Dosimetry VL - 146 IS - 1-3 N2 - This study reports carbon isotopic ratios (Δ(14)C and δ(13)C) of dissolved humic and fulvic acids in the Tokachi River system, northern Japan. These acids have a refractory feature and they represent the largest fraction of dissolved organic matter in aquatic environments. The acids were isolated using the XAD extraction method from river water samples collected at three sites (on the upper and lower Tokachi River, and from one of its tributaries) in June 2004 and 2005. δ(13)C values were -27.8 to -26.9 ‰ for humic and fulvic acids. On the other hand, the Δ(14)C values ranged from -247 to +26 ‰ and the average values were -170 ± 79 ‰ for humic acid and -44 ± 73 ‰ for fulvic acid. The difference was attributed to the residence time of fulvic acid in the watershed being shorter than that of humic acid. The large variation suggested that humic substances have a different pathway in each watershed environment. SN - 1742-3406 UR - https://www.unboundmedicine.com/medline/citation/21515623/Carbon_isotope_composition_of_dissolved_humic_and_fulvic_acids_in_the_Tokachi_River_system_ L2 - https://academic.oup.com/rpd/article-lookup/doi/10.1093/rpd/ncr180 DB - PRIME DP - Unbound Medicine ER -