Composition of dissolved organic matter (DOM) from periodically submerged soils in the Three Gorges Reservoir areas as determined by elemental and optical analysis, infrared spectroscopy, pyrolysis-GC–MS and thermally assisted hydrolysis and methylation

Jiang, Tao; Kaal, Joeri; Liang, Jiaping; Zhang, Yaoling; Wei, Shiqiang; Wang, Dingyong; Green, Nelson W.

doi:10.1016/j.scitotenv.2017.06.114

Cited by 84 publications

(54 citation statements)

References 92 publications

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“…BIX had a positive relationship with FI (P < 0.01, Fig. 3), which is in line with a previous study of Jiang et al [7]. In general, SUVA 254 , BIX, HIX and FI of the DOM varied with different soil types (Table 2).…”

Section: Effect Of Soil Types On the Spectral Characteristics Of Soilsupporting

confidence: 91%

“…3) may hint that DOC served as a significant C source for the growth of soil microbiome and favored the decomposition and humification of SOM in soil [6,47]. FI and BIX of the soil DOM were mainly distributed in the ranges of 1.4 < FI < 1.9 and 0.6 < BIX < 1.0 (Table 2) and suggested a joint contribution of DOM from microbial and allochthonous sources [7,48]. The DOM of the paddy and red soils had lower BIX and FI than that of the chernozem and cinnamon soils, showing greater autochthonous sources which may be due to stronger microbial activity [49].…”

Section: Effect Of Soil Types On the Spectral Characteristics Of Soilmentioning

confidence: 98%

“…Despite its small content in soil, DOM is the most reactive fraction of organic matter in soils and plays a significant role in the terrestrial biogeochemical cycles [3][4][5]. Generally, soil DOM is comprised of humic-, tyrosine-and fulvic-like substances, phenolic compounds, carbohydrates, polysaccharides and N-containing molecules derived from protein and chitin [6,7]. Due to its complex structure, DOM has been regarded as a binding hot spot for heavy metals and organic pollutants, affecting the transportation and fate of soil contaminants [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Compositional and chemical characteristics of dissolved organic matter in various types of cropped and natural Chinese soils

Wang

et al. 2019

Chem. Biol. Technol. Agric.

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Background: Exploration of composition and chemical characteristics of soil dissolved organic matter (DOM) is significant to understand its biogeochemical role in terrestrial ecosystems. A total of 43 cropped and 16 natural soils (0-20 cm) under four soil types (cinnamon, chernozem, red and paddy soils) across China were collected to investigate the spectral characteristics of DOM using UV-Vis and 3D-EEM spectroscopy. Results: The chernozem soils exhibited the highest aromaticity and humification degree among the four soil types. Ranges of biological index (BIX, 0.53-1.17) and fluorescence index (FI, 1.55-2.10) were found in the investigated DOM, showing joint contribution from allochthonous and autochthonous sources. Higher BIX and FI in the DOM of the paddy and red soils indicated a greater reliance on autochthonous sources for these two soil types. The cropped soils showed no significant differences in chemical characteristics and sources from the natural soils for the cinnamon, chernozem and red soils. UVA (16.2-47.9%) and UVC fulvic-like substances (15.4-40.5%) were the prevailing DOM components, which were highest in the chernozem soils. Additionally, the cropped soils had a higher proportion of humic-like substances than the natural soils in the DOM. Conclusions: Both soil type and land-use strongly affected the chemical characteristics of soil DOM, but only soil type had an impact on the DOM composition for the collected soils. These findings may contribute to the prediction of the biochemical behavior of soil DOM under different soil types and land-uses in terrestrial ecosystems.

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Section: Effect Of Soil Types On the Spectral Characteristics Of Soilsupporting

confidence: 91%

Section: Effect Of Soil Types On the Spectral Characteristics Of Soilmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Compositional and chemical characteristics of dissolved organic matter in various types of cropped and natural Chinese soils

Wang

et al. 2019

Chem. Biol. Technol. Agric.

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“…DOM, which is also referred to as water soluble organic matter (WSOM), was extracted from each layer. The extraction procedure was performed with deionized water (18 MΩ cm) in a 1:10 (m/v) soil/water ratio, at room temperature (20 °C) during 16 h under agitation on a shaker table (200 rpm), as performed by Jiang et al 48 The DOM was separated after centrifugation (4000 rpm) for 30 min and filtered using a glass microfiber filter of 0.45 µm (Millipore, 47 mm diameter) to separate solids. TOC were measured in the DOM samples by identifying the difference between organic carbon and inorganic carbon using a TOC Analyzer (Shimadzu, TOC-VCSN, Japan).…”

Section: Dissolved Organic Matter Isolation and Analysesmentioning

confidence: 99%

Chemical and Spectroscopic Characteristics of Anthrosol (Amazonian Dark Earth) and Surrounding Soil from the Brazilian Amazon Forest: Evaluation of Mineral and Organic Matter Content by Depth

Bento

Constantino

Tadini

et al. 2020

J. Braz. Chem. Soc.

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The chemical and spectroscopic characteristics of soil organic matter (SOM) isolated from Amazonian dark earth (ADE) and surrounding soil (SR) were evaluated according to the soil depth. The results showed opposite trends for the soils. While ADE featured SOM with a greater aromatic condensation degree and greater hydrophobicity in the top layer, the SR showed more aliphatic and polar SOM. The SOM arrangement from ADE was less hydrophobic, aromatic, and more polar in depth. In contrast, the SOM from SR showed an increase in molecular weight and hydrophobicity. Besides the aromatic protection in the SOM from ADE, there was organo-mineral protection through binding to soil minerals. This suggested that the SOM from ADE was protected by its hydrophobicity and interaction with minerals compared with that from the SR, thereby showing that the combination of both characteristics is important to create new technologies for soil carbon storage.

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“…11 Traditional analytical methods such as infrared spectroscopy and elemental analysis only reveal information of DOM on a macroscopic property level. 12,13 The most effective method for the molecular composition analysis of DOM is mass spectrometry (MS). 14 Conventional mass spectrometry, however, has a low resolution and cannot fully characterize the DOM on the molecular level.…”

Section: ■ Introductionmentioning

confidence: 99%

Validation and Evaluation of High-Resolution Orbitrap Mass Spectrometry on Molecular Characterization of Dissolved Organic Matter

Pan

Zhuo

et al. 2020

ACS Omega

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Molecular composition of dissolved organic matter (DOM) is a hot topic in subjects such as environmental science and geochemistry. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) has been applied to molecular composition characterization of DOM successfully. However, high instrument and maintenance costs have constrained its wider application. A high-resolution Orbitrap mass spectrometer (Orbitrap MS) can provide approximately 500,000 resolving power (at m/z 200), which is potentially capable of characterizing the molecular composition of DOM. In this paper, the application of highresolution Orbitrap MS was evaluated by comparing with FT-ICR MS in the aspect of resolution, mass distribution, detection dynamic range, and isotopic peak intensity ratio. The impact of instrument parameters of Orbitrap MS was further investigated, which includes ionization, ion transfer, and mass detection. The result shows that the high-resolution Orbitrap MS is capable or even preferable for molecular characterization of DOM. However, the peak intensity distributions are dependent on the instrument parameters, which could affect the environmental impact assessment caused by the sample itself. The result indicates that development of a universal and comparable method is of great demand.

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Composition of dissolved organic matter (DOM) from periodically submerged soils in the Three Gorges Reservoir areas as determined by elemental and optical analysis, infrared spectroscopy, pyrolysis-GC–MS and thermally assisted hydrolysis and methylation

Cited by 84 publications

References 92 publications

Compositional and chemical characteristics of dissolved organic matter in various types of cropped and natural Chinese soils

Compositional and chemical characteristics of dissolved organic matter in various types of cropped and natural Chinese soils

Chemical and Spectroscopic Characteristics of Anthrosol (Amazonian Dark Earth) and Surrounding Soil from the Brazilian Amazon Forest: Evaluation of Mineral and Organic Matter Content by Depth

Validation and Evaluation of High-Resolution Orbitrap Mass Spectrometry on Molecular Characterization of Dissolved Organic Matter

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