Characterization of humic acids from antarctic soils by nuclear magnetic resonance

The elemental composition and structural features of humic acids (HAs) from Antarctic soils (King George Island, Larsemann Hills, Lindsay Island) have been studied. It has been found that their elemental composition and molecular structure are intermediate between those of the HAs and fulvic acids (...

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Bibliographic Details
Published in:Eurasian soil science 2015-11, Vol.48 (11), p.1207-1211
Main Authors: Chukov, S. N, Abakumov, E. V, Tomashunas, V. M
Format: Article
Language:English
Subjects:
Acids
Amino acids
Chemical composition
Chemical elements
chemical structure
Climatic conditions
climatic factors
Decomposing organic matter
Earth and Environmental Science
Earth Sciences
elemental composition
Fulvic acids
Geotechnical Engineering & Applied Earth Sciences
Humic acid
Humic acids
Humus
hydrophilicity
NMR
Nuclear magnetic resonance
nuclear magnetic resonance spectroscopy
propane
soil
Soil Chemistry
Soils
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Summary:The elemental composition and structural features of humic acids (HAs) from Antarctic soils (King George Island, Larsemann Hills, Lindsay Island) have been studied. It has been found that their elemental composition and molecular structure are intermediate between those of the HAs and fulvic acids (FAs) of Eurasian soils (from the average values). The degree of hydrophilicity of the studied HAs is comparable to that of FAs. The low content of aromatic moieties in the HAs is related to the absence or very low proportions of phenyl propane fragments in the sources of humus formation. It has been shown that the HAs from Antarctic soils compose a separate group of humic acids whose specific features are related to hard climatic conditions and specific features of humus formation sources.
ISSN:1064-2293
1556-195X
DOI:10.1134/S1064229315110046