Citrate-regulated synthesis of hydrotalcite-like compounds as peroxymonosulfate activator - Investigation of oxygen vacancies and degradation pathways by combining DFT

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 317, P. 121704 - 121704

Published: July 5, 2022

Language: Английский

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Interfacial engineering boosting the piezocatalytic performance of Z-scheme heterojunction for carbamazepine degradation: Mechanism, degradation pathway and DFT calculation

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 317, P. 121793 - 121793

Published: July 25, 2022

Language: Английский

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Magnetic Co/Fe nanocomposites derived from ferric sludge as an efficient peroxymonosulfate catalyst for ciprofloxacin degradation

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 432, P. 134180 - 134180

Published: Dec. 23, 2021

Language: Английский

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Photocatalytic, electrocatalytic and photoelectrocatalytic degradation of pharmaceuticals in aqueous media: Analytical methods, mechanisms, simulations, catalysts and reactors

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 343, P. 131061 - 131061

Published: Feb. 23, 2022

Pharmaceuticals are used every day in most parts of the world and great proportions these substances excreted unaltered or as active sub-products, posing a threat pollution. To protect aquatic ecosystems, innovative solutions such photocatalysis, electrocatalysis photoelectrocatalysis required. In this article we provide comprehensive review photo- electrocatalytic techniques for removal pharmaceuticals from water wastewaters. The analytical toxicity methods commonly to study degradation presented, it is pointed high performance liquid chromatography analysis common method evaluate efficiency pharmaceutical's degradation. However, also highlighted that evaluation fundamental ensure adequate treatment. determination reactive species mechanistic essential understanding enhancing process. A deep discussion principles practical examples their application treatment presented. catalytic materials reactors processes pollutants reviewed focusing on some representative examples. reusability catalysts still restricted few reuse cycles. It was observed very limited results larger amounts effluent lack information about process costs, which were correlated difficulty real scale. Finally, main advantages degradation, drawbacks, low quantum and/or energetic consume out along with alternatives overcome limitations.

Language: Английский

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Peracetic Acid Enhances Micropollutant Degradation by Ferrate(VI) through Promotion of Electron Transfer Efficiency

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(16), P. 11683 - 11693

Published: July 26, 2022

Ferrate(VI) and peracetic acid (PAA) are two oxidants of growing importance in water treatment. Recently, our group found that simultaneous application ferrate(VI) PAA led to much faster degradation micropollutants compared by a single oxidant, this paper systematically evaluated the underlying mechanisms. First, we used benzoic methyl phenyl sulfoxide as probe compounds concluded Fe(IV)/Fe(V) was main reactive species, while organic radicals [CH3C(O)O•/CH3C(O)OO•] had negligible contribution. Second, removed coexistent hydrogen peroxide (H2O2) stock solution with free chlorine and, surprise, second-order reaction rate constant between be only about 1.44 ± 0.12 M–1s–1 H2O2 high (2.01 0.12) × 101 at pH 9.0. Finally, further experiments on ferrate(VI)-bisulfite ferrate(VI)-2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic)acid systems confirmed not an activator for ferrate(VI). Rather, could enhance oxidation capacity Fe(IV)/Fe(V), making their outcompete self-decay. This study, first time, reveals ability promote electron transfer efficiency high-valent metals contaminants confirms benefits co-application alkaline wastewater

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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Singlet oxygen in the removal of organic pollutants: An updated review on the degradation pathways based on mass spectrometry and DFT calculations

Chemosphere, Journal Year: 2023, Volume and Issue: 345, P. 140203 - 140203

Published: Sept. 19, 2023

Language: Английский

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In situ etched graphite felt modified with CuFe2O4/Cu2O/Cu catalyst derived from CuFe PBA for the efficient removal of sulfamethoxazole through a heterogeneous electro-Fenton process

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 331, P. 122722 - 122722

Published: April 3, 2023

Language: Английский

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Metallic Bi self-deposited BiOCl promoted piezocatalytic removal of carbamazepine

Surfaces and Interfaces, Journal Year: 2021, Volume and Issue: 26, P. 101335 - 101335

Published: July 10, 2021

Language: Английский

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Self-Assembly of Nanosheet-Supported Fe-MOF Heterocrystals as a Reusable Catalyst for Boosting Advanced Oxidation Performance via Radical and Nonradical Pathways

ACS Applied Materials & Interfaces, Journal Year: 2021, Volume and Issue: 13(19), P. 22694 - 22707

Published: May 4, 2021

Heterojunction catalysts have drawn increasing interest for the visible light-driven Fenton reaction and bring tremendous opportunities environmental remediation. Herein, a BiOI/MIL-53(Fe) Z-scheme heterojunction (named BMFe) was synthesized first time via facile strategy. Compared with pristine BiOI MIL-53(Fe) catalysts, two-dimensional/three-dimensional (2D/3D) catalyst manifested remarkable catalytic performance toward degradation of phenol, bisphenol A, methylene blue, carbamazepine, which is attributed mainly to interfacial integration efficient charge separation. By virtue coupling at interface, as confirmed by XPS, 57Fe Mössbauer spectroscopy, DFT calculations, BMFe promoted transfer electron–hole pairs improved chemical activation hydrogen peroxide. The subsequent holes, free radicals, nonradicals can effectively continuously decompose pollutants, achieving positive synergistic effect between photocatalysis reactions. Simultaneously, specially designed BiOX(X = Br, Cl)/MIL-53(Fe) BiOI/Fe-MOFs(MIL-101, MIL-88) heterojunctions also exhibited advanced oxidative capacity organic pollutants. Given their practical value industrial applications, beads (1.0 ± 0.15 mm) blend cross-linking method significantly advance long-term stability recyclability. Fe-based metal–organic frameworks bismuth oxyhalide semiconductors provides new perspective on developing

Language: Английский

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