Nickel Binding Affinity with Size-Fractioned Sediment Dissolved and Particulate Organic Matter and Correlation with Optical Indicators

Chuang, Cheng-Wen; Hsu, Liang-Fong; Hsiang-Chun, Tsai; Liu, Yung-Yu; Huang, Wenjiang; Chen, Ting-Chien

doi:10.3390/app10248995

Cited by 9 publications

(11 citation statements)

References 44 publications

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“…In addition, as a clear decrease in bioavailable DOC has been found along the inland aquatic ecosystems, estuaries, coasts, and open seawaters, if a higher value of mass wa robustly indicates higher recalcitrance of DDOM, the DDOM could then consistently increase the recalcitrance of a bulk DOM sample and contribute to the carbon sequestration potential. In addition, halogenated organic molecules or metal-bearing DDOM , could further increase the molecular weight and then its relative recalcitrance, yet this hypothesis also requires further studies in the future.…”

Section: Resultsmentioning

confidence: 99%

The Hunt for Chemical Dark Matter across a River-to-Ocean Continuum

Cai,

Yao,

et al. 2024

Environ. Sci. Technol.

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Thousands of mass peaks emerge during molecular characterization of natural dissolved organic matter (DOM) using ultrahigh-resolution mass spectrometry. While mass peaks assigned to certain molecular formulas have been extensively studied, the uncharacterized mass peaks that represent a significant fraction of organic matter and convey biogenic elements and energy have been previously ignored. In this study, we introduce the term dark DOM (DDOM) for unassigned mass peaks and have explored its characteristics and environmental behaviors using a data set of 38 DOM extracts covering the Yangtze River-to-ocean continuum. We identified a total of 9141 DDOM molecules, which exhibited higher molecular weight and greater diversity than the DOM subset with assigned DOM formulas. Although DDOM contributed a smaller fraction of relative abundance, it significantly impacted the molecular weight and molecular composition of bulk DOM. A portion of DDOM with higher molecular weight was found to increase molecular abundance across the river-to-ocean continuum. These compounds could contain halogenated organic molecules and might have a high potential to contribute to the refractory organic carbon pool. With this study, we underline the contribution of dark matter to the total DOM pool and emphasize that more DDOM research is needed to understand its contribution to global biogeochemical cycles and carbon sequestration.

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Section: Resultsmentioning

confidence: 99%

The Hunt for Chemical Dark Matter across a River-to-Ocean Continuum

Cai,

Yao,

et al. 2024

Environ. Sci. Technol.

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“…As shown in Figure , TOC, TP, and TN had significant relationships with metal concentrations in the rivers. In aquatic environments, numerous metals strongly bind to dissolved and particulate organic matter molecules . According to the positive and negative relationships presented by the BN conditional probability coefficients (Tables S7–S9), TOC had a positive relationship with the metals, e.g., Fe, Mn.…”

Section: Discussionmentioning

confidence: 99%

“…In aquatic environments, numerous metals strongly bind to dissolved and particulate organic matter molecules. 73 According to the positive and negative relationships presented by the BN conditional probability coefficients (Tables S7−S9), TOC had a positive relationship with the metals, e.g., Fe, Mn. It reflects that an increase in organic matter molecules in water drove the desorption of metals from sediments.…”

Section: Source Apportionment Of Metals In the Riversmentioning

confidence: 95%

Bayesian-Based Approaches to Exploring the Long-Term Alteration in Trace Metals of Surface Water and Its Driving Forces

Wang

Hua

Zhang

et al. 2023

Environ. Sci. Technol.

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Trace metal pollution poses a serious threat to the aquatic ecosystem. Therefore, characterizing the long-term environmental behavior of trace metals and their driving forces is essential for guiding water quality management. Based on a long-term data set from 1990 to 2019, this study systematically conducted the spatiotemporal trend assessment, influential factor analysis, and source apportionment of trace elements in the rivers of the German Elbe River basin. Results show that the mean concentrations of the given elements in the last 30 years were found in the order of Fe (1179.5 ± 1221 μg·L–1) ≫ Mn (209.6 ± 181.7 μg·L–1) ≫ Zn (52.5 ± 166.2 μg·L–1) ≫ Cu (5.3 ± 5.5 μg·L–1) > Ni (4.4 ± 8.3 μg·L–1) > Pb (3.3 ± 4.4 μg·L–1) > As (2.9 ± 2.3 μg·L–1) > Cr (1.8 ± 2.4 μg·L–1) ≫ Cd (0.3 ± 1.1 μg·L–1) > Hg (0.05 ± 0.12 μg·L–1). Wavelet analyses show that river flow regimes and flooding dominated the periodic variations in metal pollution. Bayesian network suggests that the hydrochemical factors (i.e., TOC, TP, TN, pH, and EC) chemically influenced the metal mobility between water and sediments. Furthermore, the source apportionment computed by the Bayesian multivariate receptor model shows that the given element contamination was typically attributed to the geogenic sources (17.5, 95% confidence interval: 13.1–17.6%), urban and industrial sources (22.1, 18.0–27.2%), arable soil erosion (24.2, 16.4–31.5%), and historical anthropogenic activities (35.2, 32.8–43.3%). The results provided herein reveal that both the hydrochemical influence on metal mobility and the chronic disturbance from anthropogenic activities caused the long-term variation in trace metal pollution.

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“…It was also higher than the water extracted organic matter (WEOM) from the sediment's carbon mass fractions, ranging from 52% to 53% [3]. The organic carbon mass fraction of the high molecular weight fraction was comparable to the alkaline-extracted SHS solutions from sediments and ranged from 78% to 85% [9,10,17]. The sediment particular organic matter experienced hydrolysis and/or oxidative cleavage, starting with the low molecular weight and labile organic matter [4].…”

Section: Doc Concentrations and Carbon Mass Fractions Of The Size-fractioned Shsmentioning

confidence: 91%

“…The properties provide the particular sorption sites for hydrophobic organic compounds and heavy metals [6,8,9,[11][12][13][14]. However, other studies also reported low molecular weight DOM having significant sorption capacity for organic pollutants and heavy metals [15][16][17][18]. The chemical structure and composition of SHS and DOM might be the significant factor that influences the pollutants distribution, transport, and binding capacity [3,6,[18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence Properties of the Air- and Freeze-Drying Treatment on Size-Fractioned Sediment Organic Matter

et al. 2021

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Sediment humic substance (SHS) is a highly heterogeneous and complex organic mixture with a broad molecular weight range. It is the significant component that associates distribution, transport, and biotoxicity of pollutants in a river environment. Air- and freeze-drying sediment pre-treatment may cause different biological activity and may result in different chemical quantities and sediment organic matter. This study collected sediments that received livestock wastewater discharge. The sediments were air- (AD) and freeze-dried (FD). The dried sediment organic matter was extracted with an alkaline solution and separated into three size-fractioned SHS samples. Size-fractioning is an effective method used to differentiate materials, on a molecular level. The bulk solution (<0.45 μm) was designated as BHS, and size-fractioned solutions were identified as LHS (<1 kDa), MHS (1–10 kDa), and HHS (10 kDa-0.45 μm). The AD SHS had a lower dissolved organic carbon (DOC) concentration than the FD SHS for the bulk and individual size-fractioned SHS, but the AD and FD SHS had a similar distribution of organic carbon in the size-fractioned SHS. The AD SHS had higher aromaticity (SUVA254) and an extent of humification (HIX) than the FD SHS. In addition, the high molecular weight SHS (HHS) had a higher SUVA254 but lower HIX than the MHS and LHS. The HHS had significantly lower fulvic acid but had higher humic acid-like substances than the MHS and LHS. This is possibly the reason the LHS had a higher humification degree but lower aromaticity than HHS. The size-fractioned SHS and optical indicators distinguished the difference between the chemical properties when air- or freeze-dried, due to the different degree of biological activities.

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Nickel Binding Affinity with Size-Fractioned Sediment Dissolved and Particulate Organic Matter and Correlation with Optical Indicators

Cited by 9 publications

References 44 publications

The Hunt for Chemical Dark Matter across a River-to-Ocean Continuum

The Hunt for Chemical Dark Matter across a River-to-Ocean Continuum

Bayesian-Based Approaches to Exploring the Long-Term Alteration in Trace Metals of Surface Water and Its Driving Forces

Fluorescence Properties of the Air- and Freeze-Drying Treatment on Size-Fractioned Sediment Organic Matter

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