Photoaged Tire Wear Particles Leading to the Oxidative Damage on Earthworms (Eisenia fetida) by Disrupting the Antioxidant Defense System: The Definitive Role of Environmental Free Radicals

Environmental Science & Technology, Год журнала: 2024, Номер 58(10), С. 4500 - 4509

Опубликована: Фев. 28, 2024

Tire wear particles (TWPs) have caused increasing concerns due to their detrimental effects on the soil ecosystem. However, role of weathering in altering toxicity TWP organisms is poorly understood. In this study, original and photoaged was compared using earthworms (Eisenia fetida) as model organisms. The obtained results indicated that photoaging resulted an increase environmentally persistent free radicals (EPFRs) from 3.69 × 1017 5.20 spin/g. Meanwhile, induced changes toxic endpoint E. fetide, i.e., weight loss death ratio 0.0425 0.0756 g/worm 23.3 50% under a 10% concentration, respectively. Analyses transcriptomics, antioxidant enzyme activity, histopathology demonstrated enhanced mainly oxidative damage, which by disruption defense system. Free-radical quenching correlation analysis further suggested excessive production ex vivo reactive oxygen species, EPFRs, led exhaustion Overall, work provides new insights into potential hazard weathered environment has significant implications for recycling proper disposal spent tire particles.

Язык: Английский

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Soil carbon and nitrogen cycles driven by iron redox: A review

The Science of The Total Environment, Год журнала: 2024, Номер 918, С. 170660 - 170660

Опубликована: Фев. 6, 2024

Язык: Английский

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Strong Substance Exchange at Paddy Soil-Water Interface Promotes Nonphotochemical Formation of Reactive Oxygen Species in Overlying Water

Environmental Science & Technology, Год журнала: 2024, Номер 58(17), С. 7403 - 7414

Опубликована: Апрель 17, 2024

Photochemically generated reactive oxygen species (ROS) are widespread on the earth's surface under sunlight irradiation. However, nonphotochemical ROS generation in water (e.g., paddy overlying water) has been largely neglected. This work elucidated drivers of and its spatial distribution undisturbed water, by combining imaging technology with situ monitoring. It was found that H2O2 concentrations formed three waters could reach 0.03–16.9 μM, profiles exhibited heterogeneity. The O2 planar-optode indicated redox interfaces were not always at soil–water interface but also possibly layer, depending soil properties. facilitated a rapid turnover reducing oxidizing substances, creating an ideal environment for ROS. Additionally, electron-donating capacities increased 4.5–8.4 times compared to top layers. Importantly, field investigation results confirmed sustainable •OH through pathways constituted significant proportion total daily production (>50%), suggesting comparable or even greater role than photochemical generation. In summary, process reported this study greatly enhances understanding natural processes soils.

Язык: Английский

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Dynamic Production of Hydroxyl Radicals during the Flooding–Drainage Process of Paddy Soil: An In Situ Column Study

Environmental Science & Technology, Год журнала: 2023, Номер 57(43), С. 16340 - 16347

Опубликована: Окт. 19, 2023

Frequent cycles of flooding and drainage in paddy soils lead to the reductive dissolution iron (Fe) minerals reoxidation Fe(II) species, all while generating a robust consistent output reactive oxygen species (ROS). In this study, we present comprehensive assessment temporal spatial variations Fe ROS during flooding-drainage process representative soil. Our laboratory column experiments showed that decrease dissolved O2 concentration led rapid reduction below water-soil interface, aqueous was transformed into solid phases over an extended time. As result, •OH production capacity liquid reduced improved. The increased from 227-271 μmol kg-1 (within 1-11 cm depth) 500-577 499-902 after 50 day, 3 month, 1 year incubation, respectively. During drainage, dynamic triggered by consumption oxidation. ROS-trapping film situ capture revealed soil surface active zone for intense H2O2 production, limited observed deeper layers (>5 cm) due penetration. These findings provide more insights complex interplay between cycling redox transition zones fields.

Язык: Английский

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New Barrier Role of Iron Plaque: Producing Interfacial Hydroxyl Radicals to Degrade Rhizosphere Pollutants

Environmental Science & Technology, Год журнала: 2023, Номер 58(1), С. 795 - 804

Опубликована: Дек. 14, 2023

Iron plaque, as a natural barrier between rice and soil, can reduce the accumulation of pollutants in by adsorption, contributing to safe production contaminated soil. In this study, we unveiled new role iron i.e., producing hydroxyl radicals (·OH) activating root-secreted oxygen degrade pollutants. The ·OH was produced on plaque surface then diffused interfacial layer rhizosphere environment. activated via successive three-electron transfer produce ·OH, involving superoxide hydrogen peroxide intermediates. structural Fe(II) played dominant rather than adsorbed Fe(II), since thermodynamically more favorable for activation. vacancies accompanied an important activation ·OH. selectively degraded that could be onto less affected environments free This study uncovered oxidative mediated its reshaping our understanding rice.

Язык: Английский

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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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Stability and Biotransformation of 6:2 Fluorotelomer Sulfonic Acid, Sulfonamide Amine Oxide, and Sulfonamide Alkylbetaine in Aerobic Sludge

Environmental Science & Technology, Год журнала: 2024, Номер 58(5), С. 2446 - 2457

Опубликована: Янв. 5, 2024

The 6:2 fluorotelomer sulfonamide (6:2 FTSAm)-based compounds signify a prominent group of per- and polyfluoroalkyl substances (PFAS) widely used in contemporary aqueous film-forming foam (AFFF) formulations. Despite their widespread presence, the biotransformation behavior these wastewater treatment plants remains uncertain. This study investigated FTSAm-based amine oxide FTNO), alkylbetaine FTAB), sulfonic acid FTSA) aerobic sludge over 100-day incubation period. alkylamine FTAA), primary intermediate product FTNO, was indirectly assessed. Their stability ranked based on estimated half-lives (t1/2): FTAB (no obvious products were detected) ≫ FTSA (t1/2 ≈28.8 days) > FTAA ≈11.5 FTNO ≈1.2 days). Seven transformation 15 identified through nontarget suspect screening using high-resolution mass spectrometry. pathways proposed. Interestingly, FTSAm hardly hydrolyzed to further biotransformed perfluoroalkyl carboxylic acids (PFCAs). Furthermore, novel for generation perfluoroheptanoic (PFHpA) from revealed.

Язык: Английский

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Field Quantification of Hydroxyl Radicals by Flow-Injection Chemiluminescence Analysis with a Portable Device

Environmental Science & Technology, Год журнала: 2024, Номер 58(6), С. 2808 - 2816

Опубликована: Янв. 16, 2024

Hydroxyl radical (•OH) is a powerful oxidant abundantly found in nature and plays central role numerous environmental processes. On-site detection of •OH highly desirable for real-time assessments •OH-centered processes yet restrained by lack an analysis system suitable field applications. Here, we report the development flow-injection chemiluminescence (FIA-CL) continuous •OH. The based on reaction with phthalhydrazide to generate 5-hydroxy-2,3-dihydro-1,4-phthalazinedione, which emits (CL) when oxidatively activated H2O2 Cu3+. FIA-CL was successfully validated using Fenton as standard source. Unlike traditional absorbance- or fluorescence-based methods, CL could minimize interference from medium (e.g., organic matter), therefore attaining sensitive (limits quantification = 0.035 0.12 nM, respectively). broad applications were illustrated on-site 24 h produced photochemical lake water air, where temporal variations productions (1.0–12.2 nM 1.5–37.1 × 107 cm–3 air) agreed well sunlight photon flux. Further, enabled oxidation reduced substances triggered tidal fluctuations coastal soils. superior analytical capability opens new opportunities monitoring dynamics under conditions.

Язык: Английский

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Differential interactions between natural clay minerals and dissolved organic matter affect reactive oxygen species formation

Water Research, Год журнала: 2023, Номер 249, С. 120984 - 120984

Опубликована: Дек. 6, 2023

Naturally occurring reactive oxygen species (ROS) are widely involved in many environmental processes. Here we investigated the ROS generation associated with interaction between complexed natural clay minerals (CMs) and dissolved organic matter (DOM). Our results showed that among nine chemical-reduced CMs (CR-CMs), light brown CR-CM (CR-CM 7) generated highest via oxygenation, relying on structural Fe(II) (Fe can transfer electrons to oxygen) instead of total as previously reported. Moreover, DOM affected oxygenation CR-CMs differently. The tight 7 formed DOM-complexed Fe, while weak dark gold 1) black 5) exhibited decreased efficiencies. Mechanism studies revealed were through three pathways but all followed a similar one-electron process presence DOM. We further developed three-layer geobattery model system demonstrated long electron driven by CR-CMs/DOM could extend several centimetres across oxic-anoxic interface, even without redox switching. These findings offer new insights into CMs-involved transformation environments.

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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