Environmental aspects of molecular composition of humic acids isolated from lake sediments of a permafrost-affected area of the Arctic

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Environmental aspects of molecular composition of humic acids isolated from lake sediments of a permafrost-affected area of the Arctic. / Guzeva, Alina V.; Krylova, Ekaterina A.; Fedorova, Irina V.

In: Polish Polar Research, Vol. 42, No. 3, 2021, p. 173-191.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{66046d3cd12d45cf880fdc0db91fc6f6,

title = "Environmental aspects of molecular composition of humic acids isolated from lake sediments of a permafrost-affected area of the Arctic",

abstract = "Humic substances are ubiquitous in terrestrial and aquatic ecosystems. Humic acids (HAs) actively interact with organic and inorganic components of lake sediments. This inter-action depends on the molecular structure and elemental composition of HAs. The presented research focuses on the investigation of the composition and molecular structure of humic acids isolated from lakes located in the Lena Delta in the Russian Arctic. The findings of the research are needed to estimate the potential capacity of humic acids to bind microelements, particularly toxic metals, in stable compounds. Surface sediment samples (0-10 cm) were collected from 8 lakes by Van Veen grab during the summer period of the {"}Expedition LENA 2019{"}. We analyzed elemental composition of the HAs samples. The results showed that the studied HAs of lake sediments are characterized by low nitrogen content and prevalence of aliphatic fragments in their molecular structure. Furthermore, it was found that the studied humic acids are less mature, showing mineralization processes dominant over humification, and have relatively low potential to complexation compared with soils of the Lena Delta as well as lake sediments of territories with more boreal climate conditions. ",

keywords = "Arctic, Humic substances, Lena Delta lakes, Permafrost, Siberia, BASINS, CARBON, STABILIZATION, humic substances, SUBSTANCES, STATE, PEAT, NMR, permafrost, METALS, ELEMENTAL COMPOSITION, SOIL ORGANIC-MATTER",

author = "Guzeva, {Alina V.} and Krylova, {Ekaterina A.} and Fedorova, {Irina V.}",

note = "Publisher Copyright: Copyright {\textcopyright} 2021. Alina V. Guzeva, Ekaterina A. Krylova and Irina V. Fedorova.",

year = "2021",

doi = "10.24425/ppr.2021.137142",

language = "English",

volume = "42",

pages = "173--191",

journal = "Polish Polar Research",

issn = "0138-0338",

publisher = "De Gruyter",

number = "3",

}

RIS

TY - JOUR

T1 - Environmental aspects of molecular composition of humic acids isolated from lake sediments of a permafrost-affected area of the Arctic

AU - Guzeva, Alina V.

AU - Krylova, Ekaterina A.

AU - Fedorova, Irina V.

PY - 2021

Y1 - 2021

N2 - Humic substances are ubiquitous in terrestrial and aquatic ecosystems. Humic acids (HAs) actively interact with organic and inorganic components of lake sediments. This inter-action depends on the molecular structure and elemental composition of HAs. The presented research focuses on the investigation of the composition and molecular structure of humic acids isolated from lakes located in the Lena Delta in the Russian Arctic. The findings of the research are needed to estimate the potential capacity of humic acids to bind microelements, particularly toxic metals, in stable compounds. Surface sediment samples (0-10 cm) were collected from 8 lakes by Van Veen grab during the summer period of the "Expedition LENA 2019". We analyzed elemental composition of the HAs samples. The results showed that the studied HAs of lake sediments are characterized by low nitrogen content and prevalence of aliphatic fragments in their molecular structure. Furthermore, it was found that the studied humic acids are less mature, showing mineralization processes dominant over humification, and have relatively low potential to complexation compared with soils of the Lena Delta as well as lake sediments of territories with more boreal climate conditions.

AB - Humic substances are ubiquitous in terrestrial and aquatic ecosystems. Humic acids (HAs) actively interact with organic and inorganic components of lake sediments. This inter-action depends on the molecular structure and elemental composition of HAs. The presented research focuses on the investigation of the composition and molecular structure of humic acids isolated from lakes located in the Lena Delta in the Russian Arctic. The findings of the research are needed to estimate the potential capacity of humic acids to bind microelements, particularly toxic metals, in stable compounds. Surface sediment samples (0-10 cm) were collected from 8 lakes by Van Veen grab during the summer period of the "Expedition LENA 2019". We analyzed elemental composition of the HAs samples. The results showed that the studied HAs of lake sediments are characterized by low nitrogen content and prevalence of aliphatic fragments in their molecular structure. Furthermore, it was found that the studied humic acids are less mature, showing mineralization processes dominant over humification, and have relatively low potential to complexation compared with soils of the Lena Delta as well as lake sediments of territories with more boreal climate conditions.

KW - Arctic

KW - Humic substances

KW - Lena Delta lakes

KW - Permafrost

KW - Siberia

KW - BASINS

KW - CARBON

KW - STABILIZATION

KW - humic substances

KW - SUBSTANCES

KW - STATE

KW - PEAT

KW - NMR

KW - permafrost

KW - METALS

KW - ELEMENTAL COMPOSITION

KW - SOIL ORGANIC-MATTER

UR - http://www.scopus.com/inward/record.url?scp=85114763884&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/5bf8147c-91c6-3566-8230-98f4d4c72f95/

U2 - 10.24425/ppr.2021.137142

DO - 10.24425/ppr.2021.137142

M3 - Article

AN - SCOPUS:85114763884

VL - 42

SP - 173

EP - 191

JO - Polish Polar Research

JF - Polish Polar Research

SN - 0138-0338

IS - 3

ER -

ID: 85843307