Effects of Polylactic Acid Microplastics on Dissolved Organic Matter Across Soil Types: Insights into Molecular Composition

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 137356 - 137356

Опубликована: Янв. 1, 2025

Язык: Английский

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Interactive Effects of Soil Dissolved Organic Matter (DOM) and Per- and Polyfluoroalkyl Substances on Contaminated Soil Site: DOM Molecular-Level Perspective

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 137372 - 137372

Опубликована: Янв. 1, 2025

Язык: Английский

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Revealing Molecular Connections between Dissolved Organic Matter in Surface Water Sources and Their Cytotoxicity Influenced by Chlorination Disinfection

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

Опубликована: Янв. 27, 2025

Dissolved organic matter (DOM) is the primary precursor of disinfection products (DBPs) during chlorination. However, compositional characteristics DOM transformation chlorination process in different source waters and its relationship to cytotoxicity remain understudied. Here, we used high-resolution mass spectrometry evaluate chlorination-induced molecular-level changes derived from surface water sources. We correlated components with profiles selected DBPs using new alternative methods predictive toxicological assessments. Our findings indicate a selective natural tendency for lignin protein conversion manual process. The reactivity bioactive compounds decreased order > tannin or ConAC. mainly attributed lignin- protein-like within CHO CHNO groups. Additionally, mitochondrial damage highly sensitive indicator DOM-induced cytotoxicity. toxicity revealed 37 common toxicity-driving characterized by low mass, medium H/C ratio, O/C reduction state, hydrophobicity. highlight need exploit health effects provide substantial experimental evidence necessity remove potential toxicants.

Язык: Английский

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Iron(II/III) Alters the Relative Roles of the Microbial Byproduct and Humic Acid during Chromium(VI) Reduction and Fixation by Soil-Dissolved Organic Matter

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

Опубликована: Янв. 30, 2025

Though reduction of hexavalent chromium (Cr(VI)) to Cr(III) by dissolved organic matter (DOM) is critical for the remediation polluted soils, effects DOM chemodiversity and underlying mechanisms are not fully elucidated yet. Here, Cr(VI) immobilization mediated microbial byproduct (MBP)- humic acid (HA)-like components in (hot) water-soluble (WSOM), (H)WSOM, from four soil samples tropical subtropical regions China were investigated. It demonstrates that capacity decreases order WSOM > HWSOM MBP-enriched HA-enriched due higher contents low molecular weight saturated compounds CHO molecules former. The presence Fe(II/III) selectively coprecipitates with high (e.g., tannins, lignin, CHON-rich compounds) form ferrihydrite greatly inhibits transformation fixation but enhances DOM. This probably owing combined (1) increase electron-donating Fe(II) generation during reactions HA Fe(III), respectively; (2) enrichment phenolic carboxyl groups, aromatic compounds, carbon defects on surfaces; (3) acceleration decomposition MBP mineralization hydroxyl radicals. These findings enhance our understanding DOM, complex interactions between Cr(VI), Fe(II/III), can help design strategies contaminated environments.

Язык: Английский

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Biocrusts benefit soil carbon sequestration via increasing the stability of soil dissolved organic carbon in dryland ecosystem

Journal of Environmental Management, Год журнала: 2025, Номер 375, С. 124304 - 124304

Опубликована: Янв. 30, 2025

Язык: Английский

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Evaluating soil dissolved organic matter as a proxy for soil organic matter properties across diverse ecosystems

Soil Biology and Biochemistry, Год журнала: 2025, Номер unknown, С. 109752 - 109752

Опубликована: Фев. 1, 2025

Язык: Английский

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Woody plant reduces soil organic carbon controlled by precipitation

Journal of Environmental Management, Год журнала: 2025, Номер 377, С. 124581 - 124581

Опубликована: Фев. 22, 2025

Язык: Английский

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Unravelling Riverine Dissolved Organic Matter Sources Using Molecular Fingerprints and FEAST Model in A Multi-tributary Mountain River Basin

Water Research, Год журнала: 2025, Номер 280, С. 123478 - 123478

Опубликована: Март 11, 2025

Язык: Английский

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Effects of DOM Chemodiversity on Microbial Diversity in Forest Soils on a Continental Scale

Global Change Biology, Год журнала: 2025, Номер 31(3)

Опубликована: Март 1, 2025

ABSTRACT Soil dissolved organic matter (DOM) is a critical reservoir of carbon and nutrients in forest ecosystems, playing central role cycling microbial community dynamics. However, the influence DOM molecular‐level diversity (chemodiversity) on spatial distribution remains poorly understood. In this study, we used Fourier transform ion cyclotron resonance mass spectrometry high‐throughput sequencing to analyze soil along ~4,000 km transect China. We found that chemodiversity varies significantly across sites, initially increasing then decreasing with latitude. Additionally, observed biogeographic components has differential effects bacterial fungal diversity: lipid‐like compounds are strongly associated diversity, while aromatic‐, carbohydrate‐, primarily diversity. Linear models structural equation modeling both reveal acts as key intermediary, mediating temperature properties distribution. Our findings emphasize importance molecular characteristics shaping structure functioning, providing new insights into how environmental factors ecosystems cycles ecosystems.

Язык: Английский

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Soil-derived Dissolved Organic Matter in Inland Wetlands along A Temperate River: Insights from Spectroscopic Characteristics Coupled with Machine Learning Methods

Water Research X, Год журнала: 2025, Номер unknown, С. 100339 - 100339

Опубликована: Март 1, 2025

Язык: Английский

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