Degradation of Organic Contaminants by Reactive Iron/Manganese Species: Progress and Challenges

Water Research, Journal Year: 2022, Volume and Issue: 221, P. 118765 - 118765

Published: June 16, 2022

Language: Английский

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Efficient activation of ferrate(VI) by colloid manganese dioxide: Comprehensive elucidation of the surface-promoted mechanism

Water Research, Journal Year: 2022, Volume and Issue: 215, P. 118243 - 118243

Published: March 1, 2022

Language: Английский

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Dissolved organic matter promotes photocatalytic degradation of refractory organic pollutants in water by forming hydrogen bonding with photocatalyst

Water Research, Journal Year: 2023, Volume and Issue: 242, P. 120297 - 120297

Published: July 2, 2023

Language: Английский

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Ferrate(VI)/Periodate System: Synergistic and Rapid Oxidation of Micropollutants via Periodate/Iodate-Modulated Fe(IV)/Fe(V) Intermediates

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(17), P. 7051 - 7062

Published: April 19, 2023

The presence of organic micropollutants in water sources worldwide has created a need for the development effective and selective oxidation methods complex matrices. This study is first report combination ferrate(VI) (Fe(VI)) periodate (PI) synergistic, rapid, elimination multiple micropollutants. combined system was found to outperform other Fe(VI)/oxidant systems (e.g., H2O2, peroxydisulfate, peroxymonosulfate) rapid decontamination. Scavenging, probing, electron spin resonance experiments showed that high-valent Fe(IV)/Fe(V) intermediates, rather than hydroxyl radicals, superoxide singlet oxygen, iodyl played dominant role process. Further, generation evidenced directly by 57Fe Mössbauer spectroscopic test. Surprisingly, reactivity PI toward Fe(VI) low (0.8223 M-1 s-1) at pH 8.0, implying not acting as an activator. Besides, only iodine sink PI, iodate also enhanced micropollutant abatement oxidation. Further proved and/or might function ligands, causing utilization efficiency intermediates pollutant outcompete their auto-decomposition. Finally, oxidized products plausible transformation pathways three different single Fe(VI)/PI were characterized elucidated. Overall, this proposed novel strategy (i.e., system) could efficiently eliminate clarified unexpected interactions between PI/iodate accelerated

Language: Английский

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Ozone- and Hydroxyl Radical-Induced Degradation of Micropollutants in a Novel UVA-LED-Activated Periodate Advanced Oxidation Process

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(47), P. 18607 - 18616

Published: Feb. 6, 2023

In this study, novel light emitting diode (LED)-activated periodate (PI) advanced oxidation process (AOP) at an irradiation wavelength in the ultraviolet A range (UVA, UVA-LED/PI AOP) was developed and investigated using naproxen (NPX) as a model micropollutant. The AOP remarkably enhanced degradation of NPX seven other selected micropollutants with observed pseudo-first-order rate constants ranging from 0.069 ± 0.001 to 4.50 0.145 min-1 pH 7.0, demonstrating broad-spectrum micropollutant ability. Lines evidence experimental analysis kinetic modeling confirmed that hydroxyl radical (•OH) ozone (O3) were dominant species generated AOP, they contributed evenly degradation. Increasing negatively affected degradation, could be well explained by decreased quantum yield (ΦPI) PI. kinetics presence water matrices (i.e., chloride, bicarbonate, humic acid) real waters examined, underlying mechanisms illustrated. total nine transformation products identified mainly via hydroxylation, dealkylation, pathways. proposed might promising technology for treatment aqueous solutions. pivotal role ΦPI during photolysis PI may guide future design light-assisted AOPs.

Language: Английский

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pH-Driven Efficacy of the Ferrate(VI)–Peracetic Acid System in Swift Sulfonamide Antibiotic Degradation: A Deep Dive into Active Species Evolution and Mechanistic Insights

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(48), P. 20206 - 20218

Published: Nov. 15, 2023

In the realm of wastewater treatment, power ferrate (Fe(VI)) and peracetic acid (PAA) as oxidants stands out. But their combined might is where enhancement truly lies. Their collaborative effect intensifies, but underlying mechanics, especially across varying pH levels pollutant types, still lurks in obscurity. Our study delved into sophisticated oxidation interplay among Fe(VI)-PAA, Fe(VI)-H2O2, standalone Fe(VI) systems. Notably, at a 9.0, boasting kinetic constant ∼0.127 M-1·s-1, Fe(VI)-PAA system annihilated sulfamethoxazole, outpacing its counterparts by staggering 48.73-fold when compared to Fe(VI)-H2O2 105.58-fold using individually. The behavior active species─such dynamic •OH radicals high-valent iron species (Fe(IV)/Fe(V))─shifted with variations, leading distinct degradation pathways. detailed exploration pinpoints behaviors certain from 3.0 9.0. more acidic environments, proved indispensable for system's reactivity. Conversely, inclined, was increasingly steered species. This intensive probe demystifies interactions, deepening our understanding capabilities Fe(VI)-centered guiding us toward cleaner water solutions. Importantly, value, often underappreciated, holds reins organic decontamination. Embracing this key player vital we strategize expansive systems upcoming ventures.

Language: Английский

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Facile synthesis of N-doped carbon nanorods for antibiotics degradation via PMS activation: Mechanism insight and biotoxicity assessment

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 340, P. 126849 - 126849

Published: Feb. 20, 2024

Language: Английский

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Simultaneous generation of free radicals, Fe(IV) and Fe(V) by ferrate activation: A review

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148669 - 148669

Published: Jan. 9, 2024

Language: Английский

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Catalytic MnO2/MXene/chitosan nanocomposite membrane in removing caffeine from wastewater

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: 361, P. 131504 - 131504

Published: Jan. 9, 2025

Language: Английский

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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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