Novel insights into the factors influencing rhizosphere reactive oxygen species production and their role in polycyclic aromatic hydrocarbons transformation

Soil Biology and Biochemistry, Journal Year: 2024, Volume and Issue: 198, P. 109562 - 109562

Published: Aug. 22, 2024

Language: Английский

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Fe-Based Nanomaterials and Plant Growth Promoting Rhizobacteria Synergistically Degrade Polychlorinated Biphenyls by Producing Extracellular Reactive Oxygen Species

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(34), P. 12771 - 12781

Published: Aug. 16, 2023

Plant growth promoting rhizobacteria (PGPR) produce extracellular reactive oxygen species (ROS) to protect plants from external stresses. Fe-based nanomaterials can potentially interact with PGPR and synergistically degrade organic pollutants, yet they have received no study. Here, we studied how the interaction between a typical (Pseudomonas chlororaphis, JD37) facilitated degradation of 2,4,4'-trichlorobiphenyl (PCB28), by comparing zerovalent iron 20 nm (nZVI20), 100 (nZVI100), 5 μm; oxide (α-Fe2O3, γ-Fe2O3, Fe3O4) ca. nm; ferrous ferric salts. Although all Fe materials (0.1 g L-1) alone could not aqueous PCB28 mg under dark or aerobic conditions, nZVI20, nZVI100, α-Fe2O3, Fe2+ promoted JD37, half-life shortened 16.5 h JD37 8.1 nZVI100 cotreatment. Mechanistically, stimulated secrete phenazine-1-carboxylic acid accelerated NADH/NAD+ conversion, O2*- generation; increased Fe(II) dissolution nanomaterials, facilitating *OH ROS gradually degraded into benzoic through dihydroxy substitution, oxidation quinone, Michael addition. These findings provide new strategy nanoenabled biodegradation pollutants applying PGPR.

Language: Английский

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Temporal variations in reactive oxygen species in biofilms of submerged macrophytes: The key role of microbial metabolism mediated by oxygen fluctuations

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 461, P. 132542 - 132542

Published: Sept. 12, 2023

Language: Английский

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Production of reactive oxygen species and its role in mediating the abiotic transformation of organic carbon in sandy soil under vegetation restoration

Carbon Research, Journal Year: 2023, Volume and Issue: 2(1)

Published: Oct. 13, 2023

Abstract The significant impact of vegetation restoration on the turnover organic carbon (OC) is mainly attributed to biological processes. However, contribution abiotic processes associated with reactive oxygen species (ROS) during has remained largely overlooked. Therefore, we systematically explored ROS distribution and production mechanisms in sandy soil their corresponding effects OC oxidation through field monitoring incubation experiments. cumulative concentrations hydroxyl radicals ( • OH) produced within 24 h varied different soils undergoing restoration, ranging from 2.36 22.05 μmol kg ‒1 , which were derived Fenton-like reaction hydrogen peroxide (H 2 O ) biotic-induced Fe(II). In addition, reductive SOC, H can be formed react Fe(II) generate OH. Further, OH significantly induced transformation OC, accounting for 15.93%‒25.80% dioxide (CO efflux. Specifically, 1 mol induce 0.01–0.02 CO particulate (POC) 0.03‒0.23 mineral-associated (MOC), as demonstrated by chemical quenching sterilisation This indicated that MOC was more sensitive attacks. Collectively, our findings provide insights into accumulation playing a key role SOC oxidation, well patterns its response changes environment. Graphical

Language: Английский

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Mechanism of tartaric acid mediated dissipation and biotransformation of tetrabromobisphenol A and its derivatives in soil

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 471, P. 134350 - 134350

Published: April 18, 2024

Language: Английский

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Ferric Oxide Nanomaterials and Plant-Rhizobacteria Symbionts Cogenerate Iron Plaque for Removing Highly Chlorinated Contaminants in Dryland Soils

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(25), P. 11063 - 11073

Published: June 13, 2024

Rhizosphere iron plaques derived from Fe-based nanomaterials (NMs) are a promising tool for sustainable agriculture. However, the requirement flooded conditions to generate plaque limits scope of NM application. In this study, we achieved in situ Fenton oxidation highly chlorinated persistent organic pollutant (2,2′,4,5,5′-pentachlorobiphenyl, PCB101) through mediated by interaction between α-Fe2O3 NMs and plant-rhizobacteria symbionts under dryland conditions. Mechanistically, coexistence Pseudomonas chlororaphis JD37 stimulated alfalfa roots secrete acidic reductive agents as well H2O2, which together rhizosphere reaction converted into rich Fe(II)-silicate. Further verifications reproduced vitro using compounds, confirming critical role •OH oxidative degradation PCB101. Significant reductions PCB101 content 18.6%, 42.9%, 23.2% were respectively found stem, leaf, soil after 120-d treatment, proving effectiveness NMs-plant-rhizobacteria technique simultaneously safe crop production remediation. These findings can help expand potential applications nanobio its generation both agricultural practice

Language: Английский

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Visualizing Hydrogen Peroxide Diffusion in Soils with Precipitation-Based Fluorescent Probe

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Hydrogen peroxide (H2O2)-based advanced oxidation technology has emerged as a cost-effective and green solution for tackling soil pollution. Given the highly heterogeneous nature of soil, effectiveness H2O2 remediation is significantly influenced by its diffusion distance in soils. However, dynamics effective range remain largely unexplored, primarily due to lack analytical methods mapping This study introduces precipitation-based fluorescent probe (PFP) method situ, high-resolution (micrometer scale) Using PFP method, we visualized real-time various types soils, revealing distinct patterns with rates ranging from 0.011 >0.56 mm min–1. The observed differences are associated permeability. Additionally, soils exhibited wide distances, 0.22 >11 20 min. Soil's reactivity decomposition, previously overlooked factor, critical determining H2O2. We further demonstrate that efficacy pivotal factor controlling pollutant degradation efficiency. These findings enhance our understanding reagent processes remediation, informing optimization more efficient strategies.

Language: Английский

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Microscale Spatiotemporal Variation of Reactive Oxygen Species in the Charosphere: Underlying Formation Mechanism and Their Role in CO₂ Emission

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 23, 2025

Charosphere, a highly active zone between biochar and surrounding soil, is widely present in agricultural wildfire-affected soils, yet whether reactive oxygen species (ROS) are produced within the charosphere remains unclear. Herein, production spatiotemporal evolution of ROS were explored. In situ capture visualized gradual decrease with increasing distance from biochar/soil interface. Temporally, O2•- H2O2 contents initially increased then declined incubation time, peaking at 3.04 5.40 μmol kg-1, respectively, while •OH content decreased continuously. High-throughput sequencing revealed that dissolved (DBC) facilitated by promoting growth bacteria electron-releasing capacity, such as Bacteroidetes, Acidobacteria, Actinobacteria, Chloroflexi. Additionally, adding electron transfer-weakened DBC significantly (ANOVA, P < 0.05), demonstrating also served shuttle electron-storing materials to promote accelerating transfer. This was further confirmed via fluorescence imaging, which visually showed stronger transfer ability near soil/biochar surface. Inhibition isotope experiments critical role CO2 emissions, primarily soil organic carbon. study highlights prevalent overlooked hotspot, advancing our understanding carbon turnover soils.

Language: Английский

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Enhanced removal of perfluorooctanoic acid and perfluorooctane sulphonic acid by direct current in iron-based constructed wetlands

Water Research, Journal Year: 2025, Volume and Issue: 277, P. 123302 - 123302

Published: Feb. 15, 2025

Language: Английский

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The effects of using periodic electric fields on restoring saline soil and preserving microbial communities simultaneously

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116025 - 116025

Published: March 1, 2025

Language: Английский

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