Roles of Iron (V) and Iron (IV) Species in Ferrate-Triggered Oxidation of Phenolic Pollutants and Their Transformation Induced by Phenoxyl Radical

Water Research, Journal Year: 2025, Volume and Issue: 274, P. 123133 - 123133

Published: Jan. 11, 2025

Language: Английский

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High-valent metal-oxo species transformation and regulation by co-existing chloride: Reaction pathways and impacts on the generation of chlorinated by-products

Water Research, Journal Year: 2024, Volume and Issue: 257, P. 121715 - 121715

Published: May 2, 2024

High-valent metal-oxo species (HMOS) have been extensively recognized in advanced oxidation processes (AOPs) owing to their high selectivity and chemical utilization efficiency. However, the interactions between HMOS halide ions sewage wastewater are complicated, leading ongoing debates on intrinsic reactive impacts remediation. Herein, we prepared three typical HMOS, including Fe(IV), Mn(V)-nitrilotriacetic acid complex (Mn(V)NTA) Co(IV) through peroxymonosulfate (PMS) activation comparatively studied with Cl

Language: Английский

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Confronting the Mysteries of Oxidative Reactive Species in Advanced Oxidation Processes: An Elephant in the Room

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(42), P. 18496 - 18507

Published: Oct. 9, 2024

Advanced oxidation processes (AOPs) are rapidly evolving but still lack well-established protocols for reliably identifying oxidative reactive species (ORSs). This Perspective presents both the radical and nonradical ORSs that have been identified or proposed, along with extensive controversies surrounding mechanisms. Conventional identification tools, such as quenchers, probes, spin trappers, might be inadequate analytical demands of systems in which multiple coexist, often yielding misleading results. Therefore, challenges these complex, short-lived, transient must fully acknowledged. Refining methods is necessary, supported by rigorous experiments innovative paradigms, particularly through kinetic analysis based on situ spectroscopic techniques multiple-probe strategies. To demystify complex ORSs, future efforts should made to develop advanced tools strategies enhance mechanism understanding. In addition, integrating real-world conditions into experimental designs will establish a reliable framework fundamental studies, providing more accurate insights effectively guiding design AOPs.

Language: Английский

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Catalytic ozonation of reverse osmosis concentrate from coking wastewater reuse by surface oxidation over Mn-Ce/γ-Al2O3: Effluent organic matter transformation and its catalytic mechanism

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 471, P. 134363 - 134363

Published: April 21, 2024

Language: Английский

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Reactivity of unactivated peroxymonosulfate and peroxyacetic acid with thioether micropollutants: Mechanisms and rate prediction

Water Research, Journal Year: 2024, Volume and Issue: 256, P. 121601 - 121601

Published: April 11, 2024

Language: Английский

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Ozone Reactions with Olefins and Alkynes: Kinetics, Activation Energies, and Mechanisms

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

Published: Feb. 28, 2025

The temperature dependence of the kinetics and mechanisms ozone reactions with 19 olefins 3 alkynes were investigated. second-order rate constants (kO3) for mostly in range 103–106 M–1 s–1, activation energies 17.4–37.7 kJ mol–1. In comparison, had lower kO3 (∼102 s–1) higher (36.7–48.1 mol–1). Reactivities both are mainly influenced by inductive effects substituents, steric observed cyclic olefins. 2-Buten-1,4-dial (BDA), synthesized a novel method, is toxic olefinic oxidation product from phenols. Its cis- trans-isomers show distinct reactivities ozone, (20 °C) 3.0 × 103 1.2 104 respectively. Two mols glyoxal formed per mol ozonated BDA, slow release second an α-hydroxyalkylhydroperoxide intermediate. 2-Ethynylbenzaldehyde reacts stoichiometry 1:1 = 1.6 102 s–1. Ozone attacks ethynyl group, yielding carboxyl (2-carboxybenzaldehyde, 54%), aldehyde (phthaldialdehyde), dicarbonyl stoichiometric H2O2 (21%). This study provides kinetic mechanistic information assessing abatement olefin- alkyne-containing micropollutants ozonation at various temperatures.

Language: Английский

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A competitive kinetic model based on chemical framework of ozone to predict removal performance of multi-pollutants

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145362 - 145362

Published: March 1, 2025

Language: Английский

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Optimizing taste and odor compound β-cyclocitral abatement by UV-based advanced oxidation processes: From kinetics to cost-effective comparisons

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116530 - 116530

Published: April 1, 2025

Language: Английский

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Domestic wastewater treatment towards reuse by “self-supplied” microbial electrochemical system assisted UV/H2O2 process

Water Research, Journal Year: 2024, Volume and Issue: 267, P. 122504 - 122504

Published: Sept. 23, 2024

Language: Английский

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Molecular-Level Insights into Recalcitrant Ozonation Products from Effluent Organic Matter

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Wastewater ozonation is commonly employed to enhance the subsequent biodegradation of effluent organic matter (EfOM) and contaminants concern. However, there evidence suggesting formation recalcitrant products (OPs) from EfOM. To investigate biodegradability OPs we conducted batch experiments using wastewater ozonated with mass-labeled (

Language: Английский

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