Water Research, Journal Year: 2024, Volume and Issue: 258, P. 121769 - 121769
Published: May 11, 2024
Language: Английский
Water Research, Journal Year: 2024, Volume and Issue: 258, P. 121769 - 121769
Published: May 11, 2024
Language: Английский
Water Research, Journal Year: 2023, Volume and Issue: 243, P. 120330 - 120330
Published: July 12, 2023
Language: Английский
Citations
86Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 471, P. 134351 - 134351
Published: April 19, 2024
Language: Английский
Citations
15Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 195, P. 109454 - 109454
Published: May 7, 2024
Language: Английский
Citations
13The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 919, P. 170904 - 170904
Published: Feb. 12, 2024
Language: Английский
Citations
11Microbiome, Journal Year: 2024, Volume and Issue: 12(1)
Published: Sept. 7, 2024
Language: Английский
Citations
11Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(26), P. 11436 - 11446
Published: June 21, 2024
The frequency and intensity of global wildfires are escalating, leading to an increase in derived pyrogenic dissolved organic matter (pyDOM), which potentially influences the riverine carbon reservoir poses risks drinking water safety. However, changes pyDOM properties as it traverses through soil bodies highly understudied due challenges simulating such processes under laboratory conditions. In this study, we extracted DOM along hillslope gradients depths both burned unburned catchments post wildfire. Using high-resolution mass spectrometry a substrate-explicit model, observed significant increases relative abundance condensed aromatics (ConAC) tannins wildfire-affected DOM. Wildfire-affected also displayed broader spectrum molecular thermodynamic properties, indicative its diverse composition reactivity. Furthermore, fire-induced weakening topsoil microbial reprocessing abilities hindered transformation plant-derived DOM, lignin-like compounds increased with depth fire regions. Meanwhile, distribution shared formulas gradient (from shoulder toeslope) exhibited analogous patterns catchments. Although there was prevalence ConAC tannin catchments, these fractions diminished all three Based on biodegradability by offers possibility conversion hillslopes. Our findings reveal spatial after wildfire, facilitating accurate evaluation involved watershed-scale cycle.
Language: Английский
Citations
9Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 21, 2025
Climate-driven increases in wildfire frequency may disrupt soil carbon dynamics, potentially creating positive feedback within global cycle. However, the release and lability of following remain unclear, limiting our ability to predict fire impacts on cycling. Here, we investigated chemical alterations water-extractable organic matter (WEOM) a subtropical forest by comparing burned soils an adjacent unburned site. The consensus is that fire-altered DOM aromatic less reactive. found 10 months postfire, contained nearly three times more (WEOC) than control Reactomics analysis further revealed overall 8-fold increase potential reactivity this carbon, identified higher abundances molecular formulas involved microbial reaction pathways. Specifically, exhibited elevated oxidative enzyme reactions, linked nominal oxidation state (NOSC) WEOM. Metagenomic enrichment taxa specialized degrading compounds areas, supporting occurrence pathways acting WEOM postfire soils. These findings highlight wildfires accelerate loss through reactive mobilization response, with implications for long-term carbon-climate projections.
Language: Английский
Citations
1Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 27, 2025
Pigmented microalgae thrive on supraglacial surfaces, producing "sticky" extracellular polymeric substances that combine into a mineral–organic matrix. Together, they enhance snow and ice melting by lowering the albedo. Understanding chemical nature of particulate organic matter (POM) in this matrix is crucial assessing its role carbon dynamics. We evaluated POM complexity alga-rich samples containing 0.3–6.4 wt % (OC) via extractions with solvents varying polarity, pH, OM selectivity. Extraction yields were OC analysis extracts, composition extracted was analyzed using ultrahigh-resolution mass spectrometry. Individual hot water (HW), hydrochloric acid (HCl), sodium hydroxide (NaOH) achieved up to 87% efficiency, outperforming sequential, solvent-based (<11%). HW, HCl, NaOH combined had more molecular formulas (2827) than (1926 formulas). Combined NaOH, HCl yielded an unsaturated, highly aromatic, N-containing compounds, while unsaturated aliphatics black carbon-derived polycyclic aromatics enriched solvent extracts. This profiling provides first comprehensive insights composition, opening window for understanding cryospheric cycle.
Language: Английский
Citations
1Global Biogeochemical Cycles, Journal Year: 2024, Volume and Issue: 38(10)
Published: Oct. 1, 2024
Abstract Microbes are the drivers of soil phosphorus (P) cycling in terrestrial ecosystems; however, role microbes mediating P P‐rich soils during primary succession remains uncertain. This study examined impacts bacterial community structure (diversity and composition) its functional potential (absolute abundances P‐cycling genes) on along a 130‐year glacial chronosequence eastern Tibetan Plateau. Bacterial was better predictor fractions than genes chronosequence. After glacier retreat, solubilization inorganic mineralization organic were significantly enhanced by increased diversity, changed interspecific interactions, abundant species involved mineralization, thereby increasing availability. Although 84% associated with these more closely carbon P. demand probably determined turnover, indicating dominant matter decomposition processes alpine soils. Moreover, significant decrease complexity co‐occurrence network taxa‐gene‐P at later stage indicates declining dominance driving succession. Our results reveal that bacteria complex have prominent for biogeochemical early stages
Language: Английский
Citations
8Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(13), P. 5899 - 5910
Published: March 19, 2024
The established benefits of ozone on microbial pathogen inactivation, natural organic matter degradation, and inorganic/organic contaminant oxidation have favored its application in drinking water treatment. However, viable bacteria are still present after the ozonation raw water, bringing a potential risk to membrane filtration systems terms biofilm accumulation fouling. In this study, we shed light role specific dose (0.5 mg-O3/mg-C) during long-term ultrafiltration. Results demonstrated that transformed molecular structure influent dissolved (DOM), producing fractions were highly bioavailable at 0.5, which was inferred be turning point. With increase dose, consortium substantially shifted, demonstrating decrease richness diversity. Unexpectedly, opportunistic Legionella stimulated occurred approximately 40% relative abundance higher 1. Accordingly, system with 0.5 presented lower thickness, weaker fluorescence intensity, smaller concentrations polysaccharides proteins, Raman activity, leading hydraulic resistance, compared Our findings highlight interaction mechanism between molecular-level DOM composition, consortium, performance, provides an in-depth understanding impact accumulation.
Language: Английский
Citations
7