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1 3C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands
Joint Authors
Lodygin, E.
Tomashunas, V.
Abakumov, Evgeny
Source
International Journal of Ecology
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-11-12
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Humic acids (HAs) and fulvic acids (FAs) of two Polar soils were investigated by 13C NMR and ESR spectroscopies, investigating the degree of humification and the molecular structure.
One soil, from Bolshoi Lyakhovsky Island, contains two humus horizons: modern and buried.
The other soil, from Wrangel Island, had only one modern humus horizon.
The HAs and FAs of the two soils investigated show essential differences.
The HAs show fewer oxygen-containing groups in comparison with the FAs, whereas the degree of aromaticity is two or three times higher in the HAs.
The 13C NMR data also show that HAs are very different from FAs in terms of their molecular composition and hydrophobicity.
Humification in the Arctic is limited by the very low content of lignin-derived compounds, due to the restricted vascular flora.
As a result, the HAs, isolated from Polar soils, are more similar to the corresponding FAs than to the typical HAs of temperate soils.
This was confirmed by ESR data, which show similar levels of free radical concentration for HAs and FAs and are related to the low level of aromaticity of both materials investigated.
Apparently, the humification process in the soils of Polar Arctic deserts is in an initial stage.
American Psychological Association (APA)
Abakumov, Evgeny& Lodygin, E.& Tomashunas, V.. 2015. 1 3C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands. International Journal of Ecology،Vol. 2015, no. 2015, pp.1-7.
https://search.emarefa.net/detail/BIM-1065941
Modern Language Association (MLA)
Abakumov, Evgeny…[et al.]. 1 3C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands. International Journal of Ecology No. 2015 (2015), pp.1-7.
https://search.emarefa.net/detail/BIM-1065941
American Medical Association (AMA)
Abakumov, Evgeny& Lodygin, E.& Tomashunas, V.. 1 3C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands. International Journal of Ecology. 2015. Vol. 2015, no. 2015, pp.1-7.
https://search.emarefa.net/detail/BIM-1065941
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1065941