Selective recycling of spent LiFePO4 batteries Enables toward flame-retardant polyurethane foam

Separation and Purification Technology, Год журнала: 2025, Номер 361, С. 131491 - 131491

Опубликована: Янв. 8, 2025

Язык: Английский

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Insights into the activation of PAA by a 1D single-atom Fe hollow nanotube catalyst for acyclovir degradation: The formation mechanism and nearly 100 % contribution of high-valent iron-oxo species

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 131569 - 131569

Опубликована: Янв. 1, 2025

Язык: Английский

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Rapid Iron-Mediated Aqueous-Phase Reactions of Organic Peroxides from Monoterpene-Derived Criegee Intermediates and Implications for Aerosol and Cloud Chemistry

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Fenton-like reactions between organic peroxides and transition-metal ions in the atmospheric aqueous phase have profound impacts on chemistry, composition, health effects of aerosols. However, kinetics, mechanisms, key influencing factors such remain poorly understood. In this study, we synthesized a series monoterpene-derived α-acyloxyalkyl hydroperoxides (AAHPs), an important class formed from Criegee intermediates during ozonolysis alkenes, investigated their with iron phase. We found that AAHPs are essentially chemically inert to Fe3+ but highly reactive toward Fe2+. The aqueous-phase reaction rate constant Fe2+ (kIIAAHP+Fe(II)) was determined range 11.0 ± 0.8 150.0 3.3 M–1 s–1, depending positively solution pH (1–3), water content (50%–90%), temperature (8–25 °C). Meanwhile, kIIAAHP+Fe(II) value is linearly correlated O/C ratio AAHPs, which allows for estimation reactivity based oxygenation level. addition, decomposition via predominantly yields alkoxy (RO) radicals production yield OH smaller than 16%. Similar several abundant including pinonic acid-derived AAHP exhibit high low dissolved α-pinene secondary aerosol. A quantitative analysis measured kinetics suggests even dominant drivers behind transformation atmosphere, would significantly affect multiphase chemistry aerosol impacts.

Язык: Английский

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Peroxide Directing the Iron Cycling for Tailored Generation of Active Oxidants in Aqueous Fenton Reactions

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 6, 2025

The diverse electron transfer between iron and peroxides endows Fenton related reactions with versatility in generating multiple active oxidants, underpinning their important contribution to environmental remediation. type of oxidant generated can be tailored by the structure peroxides, yet underlying mechanism remains uncovered. Herein, taking reaction Fe(III)-picolinate (FeIII-PICA) as an examplary case, we provide a detailed structure-activity analysis clarify this issue. Experimental results show that FeIII-PICA H2O2, tert-butyl hydroperoxide, isopropyl hydroperoxide initiates Haber-Weiss cycle generate radicals exclusively, whereas peroxymonosulfate, peracetic acid, m-chloroperoxybenzoic acid generates Fe(IV). Theoretical calculations reveal peroxide-dependent generation oxidants is attributed selectivity lysis PICA-FeIII-OOR intermediate, which serves rate-limiting step reactions. inductive effect R dynamically modulates strength Fe-O/O-O bonding stability cleavage products favor Fe-O homolysis toward Fe(III)/Fe(II) cycling. Conversely, coordination Fe(III) stabilizes transition states O-O for Fe(III)/Fe(IV) These findings are believed shed new light on pathway cycling aqueous

Язык: Английский

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Prolonged degradation of organic contaminants by Fe(II)/peracetic acid: Unraveling the roles of coexisting H2O2 and pH

Journal of Hazardous Materials, Год журнала: 2025, Номер 489, С. 137567 - 137567

Опубликована: Фев. 11, 2025

Язык: Английский

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Natural attenuation and sulfite-mediated degradation of trichloroethylene in soil: A mechanism analysis across diverse soil types

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160979 - 160979

Опубликована: Фев. 1, 2025

Язык: Английский

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Spinel-based zinc-doped Co3O4 (ZCO) catalytic membrane for efficient peroxymonosulfate activation and Chloroquine phosphate degradation: an atom doping strategy

Environmental Research, Год журнала: 2025, Номер unknown, С. 121408 - 121408

Опубликована: Март 1, 2025

Язык: Английский

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Amino-Functionalized MIL-101(Fe)-NH2 as Efficient Peracetic Acid Activator for Selective Contaminant Degradation: Unraveling the Role of Electron-Donating Ligands in Fe(IV) Generation

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138028 - 138028

Опубликована: Март 1, 2025

Язык: Английский

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Anchoring of Cu nanoparticles on the surface of magnetic separable high-entropy oxides for ultrafast catalytic degradation of sulfadiazine

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 132804 - 132804

Опубликована: Апрель 1, 2025

Язык: Английский

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High-valent ferryl intermediates generation, reactivity and kinetic characterization with contaminants of emerging concern via a facile photo-Fenton competition kinetic methodology

Journal of Hazardous Materials, Год журнала: 2025, Номер 492, С. 138216 - 138216

Опубликована: Апрель 10, 2025

Язык: Английский

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