Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy
The tundra and tundra barrens of the maritime Antarctica represent a unique type of terrestrial ecosystem, geographically confined to the region of the Antarctic Peninsula and a number of surrounding archipelagos. Antarctic soils are underestimated in the quantity of organic matter (OM) pools, organ...
Published in: | Applied and Environmental Soil Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Hindawi Limited
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1155/2022/7540077 https://doaj.org/article/80001ea3bae94f53a20df1bdc77ce0aa |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:80001ea3bae94f53a20df1bdc77ce0aa |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:80001ea3bae94f53a20df1bdc77ce0aa 2023-05-15T13:43:15+02:00 Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy Evgeny Abakumov Rositsa Yaneva Vyacheslav Polyakov Miglena Zhiyanski 2022-01-01 https://doi.org/10.1155/2022/7540077 https://doaj.org/article/80001ea3bae94f53a20df1bdc77ce0aa en eng Hindawi Limited 1687-7675 doi:10.1155/2022/7540077 https://doaj.org/article/80001ea3bae94f53a20df1bdc77ce0aa undefined Applied and Environmental Soil Science, Vol 2022 (2022) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.1155/2022/7540077 2023-01-22T19:11:55Z The tundra and tundra barrens of the maritime Antarctica represent a unique type of terrestrial ecosystem, geographically confined to the region of the Antarctic Peninsula and a number of surrounding archipelagos. Antarctic soils are underestimated in the quantity of organic matter (OM) pools, organic remnant humification/mineralization rates, and biogenic-abiogenic interactions. The structure of reserves for humic substances within the permafrost zone, as well as the role of the molecular composition of organic substances, are still poorly understood. In this study, we investigate humic acids of selected sub-Antarctic soils in terms of elemental and structural composition to evaluate OM stabilization degree and to assess carbon distributions in the molecules by solid-state CP/MAS 13C NMR and ESR spectroscopy. The results obtained show that the studied humic acids consist mainly of aliphatic structural fragments. According to ESR spectroscopy, it was noted that the most stable molecules by the data of ESR spectroscopy are formed in postornithogenic soils. In contrast, the average portion of the aromatic compounds is about 30% in humic acids, extracted from soils with evident ornithogenic effect. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Livingston Island permafrost Tundra Unknown Antarctic Antarctic Peninsula Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) The Antarctic Applied and Environmental Soil Science 2022 1 12 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir Evgeny Abakumov Rositsa Yaneva Vyacheslav Polyakov Miglena Zhiyanski Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy |
topic_facet |
geo envir |
description |
The tundra and tundra barrens of the maritime Antarctica represent a unique type of terrestrial ecosystem, geographically confined to the region of the Antarctic Peninsula and a number of surrounding archipelagos. Antarctic soils are underestimated in the quantity of organic matter (OM) pools, organic remnant humification/mineralization rates, and biogenic-abiogenic interactions. The structure of reserves for humic substances within the permafrost zone, as well as the role of the molecular composition of organic substances, are still poorly understood. In this study, we investigate humic acids of selected sub-Antarctic soils in terms of elemental and structural composition to evaluate OM stabilization degree and to assess carbon distributions in the molecules by solid-state CP/MAS 13C NMR and ESR spectroscopy. The results obtained show that the studied humic acids consist mainly of aliphatic structural fragments. According to ESR spectroscopy, it was noted that the most stable molecules by the data of ESR spectroscopy are formed in postornithogenic soils. In contrast, the average portion of the aromatic compounds is about 30% in humic acids, extracted from soils with evident ornithogenic effect. |
format |
Article in Journal/Newspaper |
author |
Evgeny Abakumov Rositsa Yaneva Vyacheslav Polyakov Miglena Zhiyanski |
author_facet |
Evgeny Abakumov Rositsa Yaneva Vyacheslav Polyakov Miglena Zhiyanski |
author_sort |
Evgeny Abakumov |
title |
Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy |
title_short |
Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy |
title_full |
Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy |
title_fullStr |
Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy |
title_full_unstemmed |
Characterization of Humic Acids Isolated from Selected Soils of Livingston Island by CP/MAS 13C NMR and ESR Spectroscopy |
title_sort |
characterization of humic acids isolated from selected soils of livingston island by cp/mas 13c nmr and esr spectroscopy |
publisher |
Hindawi Limited |
publishDate |
2022 |
url |
https://doi.org/10.1155/2022/7540077 https://doaj.org/article/80001ea3bae94f53a20df1bdc77ce0aa |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) |
geographic |
Antarctic Antarctic Peninsula Livingston Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Livingston Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Livingston Island permafrost Tundra |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Livingston Island permafrost Tundra |
op_source |
Applied and Environmental Soil Science, Vol 2022 (2022) |
op_relation |
1687-7675 doi:10.1155/2022/7540077 https://doaj.org/article/80001ea3bae94f53a20df1bdc77ce0aa |
op_rights |
undefined |
op_doi |
https://doi.org/10.1155/2022/7540077 |
container_title |
Applied and Environmental Soil Science |
container_volume |
2022 |
container_start_page |
1 |
op_container_end_page |
12 |
_version_ |
1766186333089300480 |