Mechanism deciphering of variation of soluble organic carbon storage during the sedimentary period in lacustrine sediments

Water Research, Год журнала: 2025, Номер 283, С. 123871 - 123871

Опубликована: Май 20, 2025

Язык: Английский

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Stability of Sedimentary Organic Matter: Insights from Molecular and Redox Analyses

Environmental Science and Ecotechnology, Год журнала: 2024, Номер 22, С. 100470 - 100470

Опубликована: Авг. 9, 2024

Sedimentary organic matter (SOM) affects the stability of aquatic carbon pool. The degradation process SOM is complex for its multifaceted composition. concentration and properties affect steady state, yet transformation processes in lakes remain unclear. Here we show molecular redox perspectives polluted sediments with high content diverse vegetation. We find significant differences fractions across various sites. origin matter, determined using excitation-emission matrix spectra, influences consistency composition biochemical lacustrine sediment. also observe that sulfur-containing substances decrease chain length reduce stability. Fourier-transform ion cyclotron resonance mass spectrometry shows degree saturation cause reduction. In contrast, nitrogen-containing compounds increase modified aromaticity index humin content, enhancing complexity (p < 0.05). These results complement characteristics transformations SOM. a broader perspective, this study contributes to laying foundation understanding cycle future effects.

Язык: Английский

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Environmental Fingerprints of Nonoxygen Heteroatomic Molecules in Aquatic Dissolved Organic Matter Elucidated by Ultra-High-Resolution Mass Spectrometry

ACS ES&T Water, Год журнала: 2024, Номер 4(11), С. 5027 - 5038

Опубликована: Окт. 30, 2024

The quality and chemodiversity of aquatic dissolved organic matter (DOM), crucial to global carbon cycling ecological functions, are affected by microbial anthropogenic activities. In this study, molecular characteristics DOM collected from 14 field water samples were compared with three standard the International Humic Substances Society using Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Results indicated that microbially terrestrially derived contributed surface groundwater pool, higher lability (higher H/Ciw) in than IHSS standards, which was related overall impact diverse biogeochemical processes factors. perturbations contribute more nonoxygen heteroatomic (N, S, Cl atoms) molecules water, pollutants (surfactants sucralose) had significant signatures waters intensive emissions. A strong correlation among indicators, nutrients, synthetic results activities within basin heteroatoms increased diversity. This study has highlighted environmental reflecting factors, shedding new insights into freshwater health.

Язык: Английский

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Regime difference between macrophyte and Cyanophyta dominance regulate microbial carbon sequestration mode in lake sediments

Water Research, Год журнала: 2024, Номер 267, С. 122481 - 122481

Опубликована: Сен. 19, 2024

Язык: Английский

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Organic matter in geothermal springs and its association with the microbial community

The Science of The Total Environment, Год журнала: 2024, Номер 954, С. 176775 - 176775

Опубликована: Окт. 8, 2024

Язык: Английский

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Planting Enhances Soil Resistance to Microplastics: Evidence from Carbon Emissions and Dissolved Organic Matter Stability

Environmental Science & Technology, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 19, 2024

Microplastics (MPs) have become a global hotspot due to their widespread distribution in recent years. MPs frequently interact with dissolved organic matter (DOM) and microbes, thereby influencing the carbon fate of soils. However, role plant presence regulating MPs-mediated changes DOM microbial structure remains unclear. Here, we compared mechanisms soil response 3 common nonbiodegradable absence or radish (Raphanus sativus L. var. radculus Pers) plants. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) analysis revealed that reduced chemodiversity biodiversity (DOM). enhanced degradation lignin-like compounds stability. Comparative showed caused less disturbance composition metabolism planted than unplanted soil. In soil, stimulated fermentation while upregulating photoautotrophic activity enhancing system The rhizosphere effect mitigated MPs-induced CO2 emissions. Overall, our study highlights crucial effects maintaining ecosystem stability under microbe-DOM-pollutant interactions, which provides theoretical basis for predicting resistance, resilience, transitions upon exposure anthropogenic source.

Язык: Английский

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Heterogeneity Assessment for Spatial Distributions and Physicochemical Properties of Navigable Lake’s Dissolved Organic Matter in Overlying/Pore Water: An Investigation in Wabu Lake, China

Process Safety and Environmental Protection, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский

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