2015
DOI: 10.1155/2015/390591
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13C NMR and ESR Characterization of Humic Substances Isolated from Soils of Two Siberian Arctic Islands

Abstract: Humic acids (HAs) and fulvic acids (FAs) of two Polar soils were investigated by13C 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 aro… Show more

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Cited by 39 publications
(36 citation statements)
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“…Soils, forming on sandy loam and silt loam classes of parent materials, have a relatively high degree of humification due to natural drainage and low degree of cryogenic processes. In soils from the islands of Sosnowiec, Vaigach, Kolguev and Andrey, the molecular and elemental composition is similar and is confirmed by data from other researchers working in the Arctic [11,[17][18][39][40][41]. Such soils develop according to the cryogenic type of soil formation.…”
Section: Characterisation Of Has By 13 C-nmr Spectroscopysupporting
confidence: 73%
See 1 more Smart Citation
“…Soils, forming on sandy loam and silt loam classes of parent materials, have a relatively high degree of humification due to natural drainage and low degree of cryogenic processes. In soils from the islands of Sosnowiec, Vaigach, Kolguev and Andrey, the molecular and elemental composition is similar and is confirmed by data from other researchers working in the Arctic [11,[17][18][39][40][41]. Such soils develop according to the cryogenic type of soil formation.…”
Section: Characterisation Of Has By 13 C-nmr Spectroscopysupporting
confidence: 73%
“…In the studied soils, mineralization processes predominate. The low content of aromatic fragments due to low microbiological activity leads to accumulation of organic matter in the soil [18][19]39]. The low content of carboxyl fragments (160-185 ppm) indicates that humic substances have low migration activity and are less enriched in oxygen-containing compounds, which is confirmed by elemental analysis data of HAs.…”
Section: Characterisation Of Has By 13 C-nmr Spectroscopymentioning
confidence: 73%
“…There are no statistically significant differences between H/C values for HAs of differently-moistured tundra soils. The differences between soils of different zones are higher that those which has been revealed for soils of different zones of the Gydan Peninsula and Arctic Islands (Ejarque and Abakumov 2016;Abakumov and Tomashunas 2016). This is caused by more expressed differences in climatic and hydrological regime between soil zones in Russian European North than in different zones of northern Siberia.…”
Section: Horizonmentioning
confidence: 70%
“…The stocks of SOM in the Antarctic are underestimated compared to the Arctic because of the lack of data for many parts of this continent, due to the high content of stones in the soils and the high variability in the carbon content of the fine earth. Stocks of organic carbon in the Antarctic soil have been reported as 0.5 kg m −2 in its polar deserts, about 1.0 kg m −2 in its barrens, up to 3-5 kg m −2 in the sub-Antarctic tundra, and up to 30 kg m −2 in the penguin rockeries of the maritime islands (Abakumov, 2010;Abakumov and Mukhametova, 2014;Abakumov et al, 2016). To date, investigation on structural composition of the SOM from both superficial and partially isolated areas has only been performed on Cryosols of the Kolyma Lowland (Lupachev et al, 2017), where the organic matter of modern and buried soils vary greatly in terms of their molecular composition and quality.…”
Section: Introductionmentioning
confidence: 99%