Seasonal and Spatial Fluctuations of Reactive Oxygen Species in Riparian Soils and Their Contributions on Organic Carbon Mineralization

Environmental Science & Technology, Год журнала: 2024, Номер 58(16), С. 7066 - 7077

Опубликована: Апрель 10, 2024

Reactive oxygen species (ROS) are ubiquitous in the natural environment and play a pivotal role biogeochemical processes. However, spatiotemporal distribution production mechanisms of ROS riparian soil remain unknown. Herein, we performed uninterrupted monitoring to investigate variation at different sites Weihe River zone throughout year. Fluorescence imaging quantitative analysis clearly showed soils. The concentration superoxide (O

Язык: Английский

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Interactions between iron mineral and low-molecular-weight organic acids accelerated nitrogen conversion and release in lake sediments

Water Research, Год журнала: 2025, Номер 275, С. 123174 - 123174

Опубликована: Янв. 21, 2025

Язык: Английский

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Molecular transformation of petroleum compounds by hydroxyl radicals produced upon oxidation of reduced nontronite

Geochimica et Cosmochimica Acta, Год журнала: 2024, Номер 371, С. 31 - 51

Опубликована: Март 4, 2024

Язык: Английский

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The Effect of Redox Fluctuation on Carbon Mineralization in Riparian Soil: An Analysis of the Hotspot Zone of Reactive Oxygen Species Production

Water Research, Год журнала: 2024, Номер 265, С. 122294 - 122294

Опубликована: Авг. 18, 2024

Язык: Английский

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Redox potential model for guiding moderate oxidation of polycyclic aromatic hydrocarbons in soils

Journal of Hazardous Materials, Год журнала: 2024, Номер 471, С. 134443 - 134443

Опубликована: Апрель 26, 2024

Язык: Английский

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A Novel Perspective on the Role of Hydroxyl Radicals in Soil Organic Carbon Mineralization within the Detritusphere: Stimulating C-Degrading Enzyme Activities

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Март 6, 2025

Detritusphere is a hotspot of carbon cycling in terrestrial ecosystems, yet the mineralization soil organic (SOC) within this microregion associated with reactive oxygen species (ROS) remains unclear. Herein, we investigated ROS production and distribution detritusphere six representative soils evaluated their contributions to SOC mineralization. We found that was significantly correlated several chemical biological factors, including pH, water-soluble phenols, water-extractable carbon, phenol oxidase activity, surface-bound or complexed Fe(II) low-crystalline minerals, highly crystalline Fe(II)-bearing SOC. These factors collectively contributed 99.6% variation production, as revealed by redundancy analyses. Among ROS, hydroxyl radicals (•OH) were key contributors mineralization, responsible for 10.4%-38.7% CO2 emissions quenching experiments. Inhibiting •OH decreased C-degrading enzyme activities, indicating stimulates increasing activity. Structural equation modeling further demonstrated promotes activities degrading phenols unlock "enzyme latch" availability upregulate gene expression. pathways equally exceeded its direct effect. findings provide detailed insight into mechanistic •OH-mediated dynamics detritusphere.

Язык: Английский

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Abiotic and biotic transformation of petroleum hydrocarbons coupled with redox cycling of structural iron in clay mineral

Geochimica et Cosmochimica Acta, Год журнала: 2025, Номер unknown

Опубликована: Март 1, 2025

Язык: Английский

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Insight into sequestration and release characteristics of uranium(VI) on phlogopite in the presence of humic acid

The Science of The Total Environment, Год журнала: 2025, Номер 973, С. 179160 - 179160

Опубликована: Март 23, 2025

Язык: Английский

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Carbon Isotope Fractionation of Dissolved Organic Matter Due to ^•OH-Based Oxidation

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Май 2, 2025

•OH-based oxidation plays a crucial role in dissolved organic matter (DOM) transformation and carbon flux, whereas quantifying the contribution of this pathway remains challenging. Here we combined concentration with isotope analysis DOM its generated CO2 to quantify oxidation. Results showed that 13C enrichment factors (ε values) were -8.1‰ -8.9‰ for benzene ring aromatic compounds, -4.2‰ -28.9‰ lower-molecular-weight acids, -13.0‰ from sediment. The fractionation sediment reflects average ε value humic substances acids. These values more negative than those photochemical microbial processes, enabling identification mechanisms. Using an end-member mix model, found proportion mineralization total emission ranged 20.9% 39.8% 100 g/L by 5-20 mM H2O2 under pH-neutral condition within 2 h was only 2% air same conditions. We also inorganic degassing contributed greatly during This study presents new isotope-based tool quantitatively assess DOM.

Язык: Английский

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Production and prediction of hydroxyl radicals in distinct redox-fluctuation zones of the Yellow River Estuary

Journal of Hazardous Materials, Год журнала: 2024, Номер 469, С. 133980 - 133980

Опубликована: Март 6, 2024

Язык: Английский

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