13C-NMR spectroscopy of humic substances isolated from agricultural soils of Puchuncavi (El Melon and Puchuncavi areas), central Chile

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

Chile is a well-developed agricultural country, which is faced with the problem of agricultural soil contamination with metals, such as Cu, Cd, Pb and Zn, and metalloids (As). These elements can be retained by soils through different mechanisms, i.e., complex-forming with organic matter or occlusion within organic matter. That is why studying soil contamination should also be accompanied by detailed investigations of the soil organic matter composition. Soil organic matter is crucial for plant growth since its decomposition releases nitrogen, phosphorus and other nutrients available for the plants. 13C nuclear magnetic resonance spectroscopy, providing crucial data on carbon functional structures diversity, can also be used to study changes in the soil organic matter (SOM) during decomposition and humification. This study is aimed at investigating the molecular composition of the soil organic matter in the agricultural soils of urbanised areas of central Chile using 13C nuclear magnetic resonance (NMR) spectroscopy. The studied soils were characterised by almost neutral pH values and organic carbon contents from 1.7% to 5.2%. The results showed that soils with an increased content of the total organic matter demonstrated an increased portion of aromaticity and a decreased portion of aliphaticity. Most of the investigated humic acids show the highest peaks centred at 125 ppm, which can be tentatively assigned to aromatic alkene structures. The relatively high stabilisation rate of the organic matter in the studied soils can be explained by the mineralisation of its peripheral part, which, in turn, is explained by the decreasing C/N ratio values. The humic substances of the studied agricultural soils of central Chile showed a high average content of aromatic carbon, which is also typical for subboreal soils.
Язык оригиналаанглийский
Число страниц8
ЖурналSoil and Water Research
Ранняя дата в режиме онлайн20 янв 2020
СостояниеЭлектронная публикация перед печатью - 20 янв 2020

Отпечаток

humic substances
melons
humic substance
agricultural soils
agricultural soil
nuclear magnetic resonance
Chile
nuclear magnetic resonance spectroscopy
soil organic matter
spectroscopy
organic matter
soil
soil pollution
decomposition
aromatic compounds
Subboreal
carbon
humification
alkene
alkenes

Цитировать

@article{9d2407cb1a6f469eb4f87b67e67684da,
title = "13C-NMR spectroscopy of humic substances isolated from agricultural soils of Puchuncavi (El Melon and Puchuncavi areas), central Chile",
abstract = "Chile is a well-developed agricultural country, which is faced with the problem of agricultural soil contamination with metals, such as Cu, Cd, Pb and Zn, and metalloids (As). These elements can be retained by soils through different mechanisms, i.e., complex-forming with organic matter or occlusion within organic matter. That is why studying soil contamination should also be accompanied by detailed investigations of the soil organic matter composition. Soil organic matter is crucial for plant growth since its decomposition releases nitrogen, phosphorus and other nutrients available for the plants. 13C nuclear magnetic resonance spectroscopy, providing crucial data on carbon functional structures diversity, can also be used to study changes in the soil organic matter (SOM) during decomposition and humification. This study is aimed at investigating the molecular composition of the soil organic matter in the agricultural soils of urbanised areas of central Chile using 13C nuclear magnetic resonance (NMR) spectroscopy. The studied soils were characterised by almost neutral pH values and organic carbon contents from 1.7{\%} to 5.2{\%}. The results showed that soils with an increased content of the total organic matter demonstrated an increased portion of aromaticity and a decreased portion of aliphaticity. Most of the investigated humic acids show the highest peaks centred at 125 ppm, which can be tentatively assigned to aromatic alkene structures. The relatively high stabilisation rate of the organic matter in the studied soils can be explained by the mineralisation of its peripheral part, which, in turn, is explained by the decreasing C/N ratio values. The humic substances of the studied agricultural soils of central Chile showed a high average content of aromatic carbon, which is also typical for subboreal soils.",
keywords = "humic acids, humification, NMR spectroscopy, Soil organic matter",
author = "Ivan Alekseev and Evgeny Abakumov",
note = "Alekseev I., Abakumov E. (2020): 13C-NMR spectroscopy of humic substances isolated from the agricultural soils of Puchuncavi (El Mel{\'o}n and Puchuncavi areas), central Chile. Soil & Water Res.",
year = "2020",
month = "1",
day = "20",
language = "English",
journal = "Soil and Water Research",
issn = "1801-5395",
publisher = "Czech Academy of Agricultural Sciences",

}

13C-NMR spectroscopy of humic substances isolated from agricultural soils of Puchuncavi (El Melon and Puchuncavi areas), central Chile. / Alekseev, Ivan ; Abakumov, Evgeny .

В: Soil and Water Research, 20.01.2020.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - 13C-NMR spectroscopy of humic substances isolated from agricultural soils of Puchuncavi (El Melon and Puchuncavi areas), central Chile

AU - Alekseev, Ivan

AU - Abakumov, Evgeny

N1 - Alekseev I., Abakumov E. (2020): 13C-NMR spectroscopy of humic substances isolated from the agricultural soils of Puchuncavi (El Melón and Puchuncavi areas), central Chile. Soil & Water Res.

PY - 2020/1/20

Y1 - 2020/1/20

N2 - Chile is a well-developed agricultural country, which is faced with the problem of agricultural soil contamination with metals, such as Cu, Cd, Pb and Zn, and metalloids (As). These elements can be retained by soils through different mechanisms, i.e., complex-forming with organic matter or occlusion within organic matter. That is why studying soil contamination should also be accompanied by detailed investigations of the soil organic matter composition. Soil organic matter is crucial for plant growth since its decomposition releases nitrogen, phosphorus and other nutrients available for the plants. 13C nuclear magnetic resonance spectroscopy, providing crucial data on carbon functional structures diversity, can also be used to study changes in the soil organic matter (SOM) during decomposition and humification. This study is aimed at investigating the molecular composition of the soil organic matter in the agricultural soils of urbanised areas of central Chile using 13C nuclear magnetic resonance (NMR) spectroscopy. The studied soils were characterised by almost neutral pH values and organic carbon contents from 1.7% to 5.2%. The results showed that soils with an increased content of the total organic matter demonstrated an increased portion of aromaticity and a decreased portion of aliphaticity. Most of the investigated humic acids show the highest peaks centred at 125 ppm, which can be tentatively assigned to aromatic alkene structures. The relatively high stabilisation rate of the organic matter in the studied soils can be explained by the mineralisation of its peripheral part, which, in turn, is explained by the decreasing C/N ratio values. The humic substances of the studied agricultural soils of central Chile showed a high average content of aromatic carbon, which is also typical for subboreal soils.

AB - Chile is a well-developed agricultural country, which is faced with the problem of agricultural soil contamination with metals, such as Cu, Cd, Pb and Zn, and metalloids (As). These elements can be retained by soils through different mechanisms, i.e., complex-forming with organic matter or occlusion within organic matter. That is why studying soil contamination should also be accompanied by detailed investigations of the soil organic matter composition. Soil organic matter is crucial for plant growth since its decomposition releases nitrogen, phosphorus and other nutrients available for the plants. 13C nuclear magnetic resonance spectroscopy, providing crucial data on carbon functional structures diversity, can also be used to study changes in the soil organic matter (SOM) during decomposition and humification. This study is aimed at investigating the molecular composition of the soil organic matter in the agricultural soils of urbanised areas of central Chile using 13C nuclear magnetic resonance (NMR) spectroscopy. The studied soils were characterised by almost neutral pH values and organic carbon contents from 1.7% to 5.2%. The results showed that soils with an increased content of the total organic matter demonstrated an increased portion of aromaticity and a decreased portion of aliphaticity. Most of the investigated humic acids show the highest peaks centred at 125 ppm, which can be tentatively assigned to aromatic alkene structures. The relatively high stabilisation rate of the organic matter in the studied soils can be explained by the mineralisation of its peripheral part, which, in turn, is explained by the decreasing C/N ratio values. The humic substances of the studied agricultural soils of central Chile showed a high average content of aromatic carbon, which is also typical for subboreal soils.

KW - humic acids

KW - humification

KW - NMR spectroscopy

KW - Soil organic matter

UR - https://www.agriculturejournals.cz/web/swr.htm?type=article&id=81_2019-SWR

UR - https://www.agriculturejournals.cz/web/swr.htm?type=onlineFirstArticles

M3 - Article

JO - Soil and Water Research

JF - Soil and Water Research

SN - 1801-5395

ER -