Spatial–temporal distribution characteristics and traceability analysis of organic matter in Shahe Reservoir (Beijing, China)

Wen, Sun; Yang, Zhang; Biao, Peng; Jing, Wang; Liu, Dian

doi:10.1038/s41598-023-49060-x

Cited by 1 publication

(1 citation statement)

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“…The sources of DOM has strong heterogeneity, due to the DOM could be generated from the natural environment, such as plant and animal residues [ 14 ], and the DOM could be also generated from human activities, such as domestic and industrial wastewater [ 15 , 16 , 17 ]. Therefore, the molecular compositions, concentrations, and transformations of these DOMs have shown significant differences in spatial and temporal variations in river ecosystems, and which spectral features are effective indicators to identify and characterize the composition and environmental behavior of DOMs [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of DOM and Their Relationships with Potentially Toxic Elements in the Inner Mongolia Section of the Yellow River, China

Wang,

Jiang,

Zhu

et al. 2024

Toxics

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The characterization of dissolved organic matter (DOM) is important for better understanding of the migration and transformation mechanisms of DOM in water bodies and its interaction with other contaminants. In this work, fluorescence characteristics and molecular compositions of the DOM samples collected from the mainstream, tributary, and sewage outfall of the Inner Mongolia section of the Yellow River (IMYR) were determined by using fluorescence spectroscopy and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). In addition, concentrations of potentially toxic elements (PTEs) in the relevant surface water and their potential relationships with DOM were investigated. The results showed that the abundance of tyrosine-like components increased significantly in downstream waters impacted by outfall effluents and was negatively correlated with the humification index (HIX). Compared to the mainstream, outfall and tributaries have a high number of molecular formulas and a higher proportion of CHOS molecular formulas. In particular, the O5S class has a relative intensity of 41.6% and the O5-7S class has more than 70%. Thirty-eight PTEs were measured in the surface water samples, and 12 found above their detective levels at all sampling sites. Protein-like components are positively correlated with Cu, which is likely indicating the source of Cu in the aquatic environment of the IMYR. Our results demonstrated that urban wastewater discharges significantly alter characteristics and compositions of DOM in the mainstream of IMYR with strongly anthropogenic features. These results and conclusions are important for understanding the role and sources of DOM in the Yellow River aquatic environment.

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