Applying a novel advanced oxidation process of biochar activated periodate for the efficient degradation of bisphenol A: Two nonradical pathways

Chemical Engineering Journal, Год журнала: 2022, Номер 453, С. 139889 - 139889

Опубликована: Окт. 19, 2022

Язык: Английский

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Efficient peroxymonosulfate activation by CoFe2O4-CeO2 composite: Performance and catalytic mechanism

Chemical Engineering Journal, Год журнала: 2022, Номер 435, С. 134840 - 134840

Опубликована: Янв. 21, 2022

Язык: Английский

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Understanding the nonradical activation of peroxymonosulfate by different crystallographic MnO2: The pivotal role of MnIII content on the surface

Journal of Hazardous Materials, Год журнала: 2022, Номер 439, С. 129613 - 129613

Опубликована: Июль 16, 2022

Язык: Английский

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Novel insights into the mechanism of periodate activation by heterogeneous ultrasonic-enhanced sludge biochar: Relevance for efficient degradation of levofloxacin

Journal of Hazardous Materials, Год журнала: 2022, Номер 434, С. 128860 - 128860

Опубликована: Апрель 6, 2022

Язык: Английский

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Carbon nitride nanotubes anchored with high-density CuNx sites for efficient degradation of antibiotic contaminants under photo-Fenton process: Performance and mechanism

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 306, С. 121119 - 121119

Опубликована: Янв. 21, 2022

Язык: Английский

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Periodate activation for degradation of organic contaminants: Processes, performance and mechanism

Separation and Purification Technology, Год журнала: 2022, Номер 292, С. 120928 - 120928

Опубликована: Март 26, 2022

Язык: 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, Год журнала: 2023, Номер 57(17), С. 7051 - 7062

Опубликована: Апрель 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

Язык: Английский

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Removal of Phenols by Highly Active Periodate on Carbon Nanotubes: A Mechanistic Investigation

Environmental Science & Technology, Год журнала: 2023, Номер 57(29), С. 10804 - 10815

Опубликована: Июль 11, 2023

Carbon nanotubes (CNTs) and their derivatives have been widely exploited to activate various oxidants for environmental remediation. However, the intrinsic mechanism of CNTs-driven periodate (PI) activation remains ambiguous, which significantly impedes scientific progress toward practical application. Here, we found that CNTs can strongly boost PI oxidation phenols. Reactive oxygen species analysis, in situ Raman characterization, galvanic process experiments, electrochemical tests revealed could form high-potential metastable intermediates (CNTs-PI*) rather than produce free radicals 1O2, thereby facilitating direct electron transfer from pollutants PI. Additionally, analyzed quantitative structure-activity relationships between rate constants phenols double descriptors (e.g., Hammett logarithm octanol-water partition coefficient). The adsorption on CNT surfaces electronic properties are critical factors affecting process. Besides, CNTs/PI system, phenol adsorbed was oxidized by CNTs-PI* complexes, products were mainly generated via coupling reaction phenoxyl radical. Most accumulated realized removal bulk solution. Such a unique non-mineralization achieved an extremely high apparent utilization efficiency 378%. activity evaluation theoretical calculations confirmed carbonyl/ketonic functional groups double-vacancy defects primary active sites, where high-oxidation-potential formed. Further, achieve stoichiometric decomposition into iodate, safe sink iodine species, without generation typical iodinated byproducts. Our discovery provides new mechanistic insight green future

Язык: Английский

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Mechanism insights into visible light-induced crystalline carbon nitride activating periodate for highly efficient ciprofloxacin removal

Chemical Engineering Journal, Год журнала: 2023, Номер 471, С. 144521 - 144521

Опубликована: Июнь 30, 2023

Язык: Английский

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Selective Removal of Organic Pollutants in Groundwater and Surface Water by Persulfate-Assisted Advanced Oxidation: The Role of Electron-Donating Capacity

Environmental Science & Technology, Год журнала: 2023, Номер 57(36), С. 13710 - 13720

Опубликована: Авг. 28, 2023

The efficiency of persulfate-assisted advanced oxidation processes (PS-AOPs) in degrading organic pollutants is affected by the electron-donating capability substances present water source. In this study, we systematically investigate capacity (EDC) difference between groundwater and surface demonstrate dependence removal on EDC target PS-AOPs with carbon nanotubes (CNTs) as a catalyst. Laboratory analyses field experiments reveal that CNT/PS system exhibits higher performance pollutant high concentration phenols, compared to water, which rich quinones. We attribute disparity selective electron transfer pathway induced potential PS-CNT substance-CNT intermediates, preferentially degrade stronger capability. This study provides valuable insights into inherent mechanism application scenarios process-dominated for treatment based pollutants.

Язык: Английский

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