Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean
Pollution of the Arctic Ocean by potentially toxic elements (PTEs) is a current environmental problem. Humic acids (HAs) play an important role in the regulation of PTE mobility in soil and water. The permafrost thaw releases ancient organic matter (OM) with a specific molecular composition into the...
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MDPI AG
2023
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Online Access: | https://doi.org/10.3390/toxics11060483 https://doaj.org/article/dde942a401664658a3e2da81c714be56 |
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ftdoajarticles:oai:doaj.org/article:dde942a401664658a3e2da81c714be56 2023-07-23T04:17:06+02:00 Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean Nikita A. Sobolev Konstantin S. Larionov Darya S. Mryasova Anna N. Khreptugova Alexander B. Volikov Andrey I. Konstantinov Dmitry S. Volkov Irina V. Perminova 2023-05-01T00:00:00Z https://doi.org/10.3390/toxics11060483 https://doaj.org/article/dde942a401664658a3e2da81c714be56 EN eng MDPI AG https://www.mdpi.com/2305-6304/11/6/483 https://doaj.org/toc/2305-6304 doi:10.3390/toxics11060483 2305-6304 https://doaj.org/article/dde942a401664658a3e2da81c714be56 Toxics, Vol 11, Iss 483, p 483 (2023) humic substances Yedoma ice complex alas Arctic potentially toxic elements Langmuir model Chemical technology TP1-1185 article 2023 ftdoajarticles https://doi.org/10.3390/toxics11060483 2023-07-02T00:36:55Z Pollution of the Arctic Ocean by potentially toxic elements (PTEs) is a current environmental problem. Humic acids (HAs) play an important role in the regulation of PTE mobility in soil and water. The permafrost thaw releases ancient organic matter (OM) with a specific molecular composition into the Arctic watersheds. This could affect the mobility of PTEs in the region. In our study, we isolated HAs from two types of permafrost deposits: the Yedoma ice complex, which contains pristine buried OM, and the alas formed in the course of multiple thaw–refreezing cycles with the most altered OM. We also used peat from the non-permafrost region as the recent environmental endmember for the evolution of Arctic OM. The HAs were characterized using 13 C NMR and elemental analysis. Adsorption experiments were conducted to assess the affinity of HAs for binding Cu 2+ and Ni 2+ . It was found that Yedoma HAs were enriched with aliphatic and N-containing structures as compared to the much more aromatic and oxidized alas and peat HAs. The adsorption experiments have revealed that the peat and alas HAs have a higher affinity for binding both ions as compared to the Yedoma HAs. The obtained data suggest that a substantial release of the OM from the Yedoma deposits due to a rapid thaw of the permafrost might increase the mobility of PTEs and their toxicity in the Arctic Ocean because of much lesser “neutralization potential”. Article in Journal/Newspaper Arctic Arctic Ocean Ice permafrost Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Langmuir ENVELOPE(-67.150,-67.150,-66.967,-66.967) Toxics 11 6 483 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
humic substances Yedoma ice complex alas Arctic potentially toxic elements Langmuir model Chemical technology TP1-1185 |
spellingShingle |
humic substances Yedoma ice complex alas Arctic potentially toxic elements Langmuir model Chemical technology TP1-1185 Nikita A. Sobolev Konstantin S. Larionov Darya S. Mryasova Anna N. Khreptugova Alexander B. Volikov Andrey I. Konstantinov Dmitry S. Volkov Irina V. Perminova Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean |
topic_facet |
humic substances Yedoma ice complex alas Arctic potentially toxic elements Langmuir model Chemical technology TP1-1185 |
description |
Pollution of the Arctic Ocean by potentially toxic elements (PTEs) is a current environmental problem. Humic acids (HAs) play an important role in the regulation of PTE mobility in soil and water. The permafrost thaw releases ancient organic matter (OM) with a specific molecular composition into the Arctic watersheds. This could affect the mobility of PTEs in the region. In our study, we isolated HAs from two types of permafrost deposits: the Yedoma ice complex, which contains pristine buried OM, and the alas formed in the course of multiple thaw–refreezing cycles with the most altered OM. We also used peat from the non-permafrost region as the recent environmental endmember for the evolution of Arctic OM. The HAs were characterized using 13 C NMR and elemental analysis. Adsorption experiments were conducted to assess the affinity of HAs for binding Cu 2+ and Ni 2+ . It was found that Yedoma HAs were enriched with aliphatic and N-containing structures as compared to the much more aromatic and oxidized alas and peat HAs. The adsorption experiments have revealed that the peat and alas HAs have a higher affinity for binding both ions as compared to the Yedoma HAs. The obtained data suggest that a substantial release of the OM from the Yedoma deposits due to a rapid thaw of the permafrost might increase the mobility of PTEs and their toxicity in the Arctic Ocean because of much lesser “neutralization potential”. |
format |
Article in Journal/Newspaper |
author |
Nikita A. Sobolev Konstantin S. Larionov Darya S. Mryasova Anna N. Khreptugova Alexander B. Volikov Andrey I. Konstantinov Dmitry S. Volkov Irina V. Perminova |
author_facet |
Nikita A. Sobolev Konstantin S. Larionov Darya S. Mryasova Anna N. Khreptugova Alexander B. Volikov Andrey I. Konstantinov Dmitry S. Volkov Irina V. Perminova |
author_sort |
Nikita A. Sobolev |
title |
Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean |
title_short |
Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean |
title_full |
Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean |
title_fullStr |
Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean |
title_full_unstemmed |
Yedoma Permafrost Releases Organic Matter with Lesser Affinity for Cu 2+ and Ni 2+ as Compared to Peat from the Non-Permafrost Area: Risk of Rising Toxicity of Potentially Toxic Elements in the Arctic Ocean |
title_sort |
yedoma permafrost releases organic matter with lesser affinity for cu 2+ and ni 2+ as compared to peat from the non-permafrost area: risk of rising toxicity of potentially toxic elements in the arctic ocean |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/toxics11060483 https://doaj.org/article/dde942a401664658a3e2da81c714be56 |
long_lat |
ENVELOPE(-67.150,-67.150,-66.967,-66.967) |
geographic |
Arctic Arctic Ocean Langmuir |
geographic_facet |
Arctic Arctic Ocean Langmuir |
genre |
Arctic Arctic Ocean Ice permafrost |
genre_facet |
Arctic Arctic Ocean Ice permafrost |
op_source |
Toxics, Vol 11, Iss 483, p 483 (2023) |
op_relation |
https://www.mdpi.com/2305-6304/11/6/483 https://doaj.org/toc/2305-6304 doi:10.3390/toxics11060483 2305-6304 https://doaj.org/article/dde942a401664658a3e2da81c714be56 |
op_doi |
https://doi.org/10.3390/toxics11060483 |
container_title |
Toxics |
container_volume |
11 |
container_issue |
6 |
container_start_page |
483 |
_version_ |
1772178384591257600 |