Characterization of Low-Molecular-Weight Dissolved Organic Matter Using Optional Dialysis and Orbitrap Mass Spectrometry DOI Creative Commons

Qiuxing Li,

Runyu Zhang, Guopei Huang

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(14), P. 3370 - 3370

Published: July 18, 2024

Low-molecular-weight (LMW, <1000 Da) dissolved organic matter (DOM) plays a significant role in metal/organic pollutant complexation, as well photochemical/microbiological processes freshwater ecosystems. The micro size and high reactivity of LMW-DOM hinder its precise characterization. In this study, Suwannee River fulvic acid (SRFA), commonly used reference material for aquatic DOM, was applied to examine the optical features molecular composition by combining membrane separation, ultraviolet–visible absorption Orbitrap mass spectrometry (MS) 100–500 Da weight cut-off (MWCO) had better performance regard separating tested relative 500–1000 MWCO membrane. absorbance decreased dramatically retentates, whereas it increased dialysates. Specifically, carbohydrates, lipids peptides exhibited selectivity early dialysis. Lignins, tannins condensed aromatic molecules displayed permeability late Overall, retentates were dominated rings phenolic hydroxyls with O/Cwa (weighted average O/C) low H/Cwa. Conversely, such dialysates numerous aliphatic chains H/Cwa compared SRFA. particular, below 200 identified MS. This work provides an operational program identifying based on SRFA standard MS analysis.

Language: Английский

Phosphorus speciation, transformation and benthic processes with implications for environmental impacts in the aquaculture area of Rushan Bay DOI
Yao Feng, Jun Liu, Aijun Zhang

et al.

Acta Oceanologica Sinica, Journal Year: 2023, Volume and Issue: 42(8), P. 99 - 112

Published: Aug. 1, 2023

Language: Английский

Citations

2
New Insights into the Synergistic Effect on Condensable Particulate Matter Based on the Formation, Characteristics and Removal DOI Creative Commons
Wenting Liu, Xin Wang, Bowen Zhao

et al.

Aerosol and Air Quality Research, Journal Year: 2023, Volume and Issue: 23(12), P. 230145 - 230145

Published: Jan. 1, 2023

Emissions of total particulate matter (TPM) from stationary combustion sources consist both filterable (FPM) and condensable (CPM). According to the study's findings, CPM emissions contributed significantly overall concentration TPM. Therefore, there has been a growing focus on physicochemical properties control strategy CPM. Firstly, this paper systematically reviewed formation, composition, characteristics, methods removing Secondly, integrating current removal methods, cold electrode electrostatic precipitator (CE-ESP) based synergistic effect multi-field coupled force coagulation was put forward installed. Thirdly, case studies CE-ESP were conducted in municipal solid waste incineration plant coal-fired power plant. The results showed that efficiency could reach as high 93%. had significant organic inorganic substances

Language: Английский

Citations

1
The Behavior and Removal of Condensable Particulate Matter in Flue Gas in a Multi-Field Force: A Modeling and Experimental Study DOI Creative Commons
W.X. Liu,

X.Y Zhang,

Zhiyong Zhou

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(3), P. 250 - 250

Published: Feb. 21, 2024

Condensable particulate matter (CPM) is different from filterable (FPM), which could escape air pollution control devices (APCDs) and pose a great threat to the environment human health. Thus, modeling experimental studies were conducted on CPM particle behavior removal, in cold electrode electrostatic precipitator (CE−ESP) coupled with electric field, temperature field concentration field. A multi−field force coupling model was then established that based mechanical of particles inside CE−ESP. The results showed beneficial depositing small size that, greater gradient, higher CPM’s removal efficiency. While tended gather larger particles, voltage provided, efficiency for FPM. In multi−field, augmented coagulation efficiencies both FPM increased significantly, reaching 89% 98%, respectively. Subsequently, experiments by self−made CE−ESP device, 91% 81% coal−fired power plant waste incineration plant, This research make contribution condensation, aggregation removal.

Language: Английский

Citations

0
Photochemical enrichment of dissolved organic matter from different soils of a tidal river basin: significance to estuarine carbon cycle DOI Creative Commons

Yuping Zhou,

Y. P. Xu,

Sen Jiang

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: June 28, 2024

Eroded soils sustain a substantial part of organic matter in tidal rivers adjacent to estuaries, and photochemical transformations would influence estuarine elemental cycles. However, complex aquatic environments diverse soil sources complicate the enrichment dissolved (DOM) photoreleased from soils. Here, we conducted 7-day irradiation experiment for seven kinds lower basin Dagu River (DGR) laboratory study salinity properties on DOM chemistry by characterizing content optical DOM. Results showed that light cultures had higher amount humic-like components than dark cultures. Principal component analysis (PCA) Mantel’s found significantly production DOM, especially components. Salinity could inhibit photodissolution soils, aged with low δ 13 C SOM released more Although DGR is impacted intruded seawater, high seawater still pointed out important contribution reservoir rivers. Considering proportion promote export flux carbon estuaries open seas. This emphasizes importance transfer lands oceans.

Language: Английский

Citations

0
Characterization of Low-Molecular-Weight Dissolved Organic Matter Using Optional Dialysis and Orbitrap Mass Spectrometry DOI Creative Commons

Qiuxing Li,

Runyu Zhang, Guopei Huang

et al.

Molecules, Journal Year: 2024, Volume and Issue: 29(14), P. 3370 - 3370

Published: July 18, 2024

Low-molecular-weight (LMW, <1000 Da) dissolved organic matter (DOM) plays a significant role in metal/organic pollutant complexation, as well photochemical/microbiological processes freshwater ecosystems. The micro size and high reactivity of LMW-DOM hinder its precise characterization. In this study, Suwannee River fulvic acid (SRFA), commonly used reference material for aquatic DOM, was applied to examine the optical features molecular composition by combining membrane separation, ultraviolet–visible absorption Orbitrap mass spectrometry (MS) 100–500 Da weight cut-off (MWCO) had better performance regard separating tested relative 500–1000 MWCO membrane. absorbance decreased dramatically retentates, whereas it increased dialysates. Specifically, carbohydrates, lipids peptides exhibited selectivity early dialysis. Lignins, tannins condensed aromatic molecules displayed permeability late Overall, retentates were dominated rings phenolic hydroxyls with O/Cwa (weighted average O/C) low H/Cwa. Conversely, such dialysates numerous aliphatic chains H/Cwa compared SRFA. particular, below 200 identified MS. This work provides an operational program identifying based on SRFA standard MS analysis.

Language: Английский

Citations

0