Oxidation of organic pollutants over MnO2 in cold water assisted by peroxydisulfate

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 479, P. 147170 - 147170

Published: Nov. 6, 2023

MnO2 can be used in advanced oxidation processes to activate peroxydisulfate (PS) and generate reactive species such as sulfate radicals (SO4•-), hydroxyl (•OH) singlet oxygen (1O2) for the abatement of organic water contaminants. Alternatively, one use particulate oxidant which, contrast PS, is active already at low temperatures. This low-temperature activity particularly attractive situ groundwater treatment. The roles PS catalyst, respectively, may invert: functions primary works re-oxidant reduced Mn-oxides. In this way, limited capacity overcome. So far, reaction systems have not been extensively explored. present study, degradation 4-hydroxybenzoic acid (HBA) by + was studied under various experimental conditions, varying temperature (15–45 °C), reagent concentrations, matrix. Both alone ability effect HBA. co-presence MnO2, a fast removal HBA from achieved even temperatures (half-life about 0.5 h with 2.4 g/L 25 owing synergic between two components. Quenching experiments indicate that step heterogeneous on surface rather than homogeneous driven SO4•- or 1O2, frequently reported literature. line results perfluorooctanoic which significantly enhanced presence MnO2.

Language: Английский

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Development of antifungal fibrous ocular insert using freeze-drying technique

Drug Delivery and Translational Research, Journal Year: 2024, Volume and Issue: 14(9), P. 2520 - 2538

Published: Feb. 16, 2024

Abstract Candida species is one of the pathogenic fungi eye responsible for keratitis that frequently causes vision impairment and blindness. Effective treatment requires long-term use antifungal drugs, which opposed by defensive mechanisms inadequate corneal penetration. The objective this study was to develop a carrier prolonged ocular application fluconazole (FLZ) treat keratitis. FLZ encapsulated into chitosan fibrous matrices (F1–F4) using different concentrations (0.02, 0.1, 0.5, 1%w/v, respectively) freeze-drying as single-step technique. Studying morphology surface properties inserts revealed porous matrix with features large area. Thermal stability chemical compatibility were confirmed DSC/TGA/DTA FT-IR, respectively. Loading capacity (LC) entrapment efficiency (EE) determined. According in vitro release study, F4 (0.11 mg −1 LC 87.53% EE) selected optimum insert because it had most sustained release, 15.85% burst followed 75.62% within 12 h. Ex vivo permeation 1.2-fold increase from compared aqueous solution. Also, pharmacokinetic rabbits, increased AUC 0-8 9.3-fold its concentration humor maintained above MIC through experimentation time. Studies on cytotoxicity (MTT assay) provide evidence safety biocompatibility F4. Therefore, freeze-dried FLZ-loaded could be promising candidate treating Graphical

Language: Английский

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MnCe-based catalysts for removal of organic pollutants in urban wastewater by advanced oxidation processes - A critical review

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 370, P. 122773 - 122773

Published: Oct. 9, 2024

Language: Английский

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A Review of Pathogen Removal from Municipal Wastewater using Advanced Oxidation Processes: Agricultural Application, Regrowth Risks, and New Perspectives

Heliyon, Journal Year: 2024, Volume and Issue: 10(20), P. e39625 - e39625

Published: Oct. 1, 2024

Language: Английский

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Facile microwave-assisted synthesis of Sb2O3-CuO nanocomposites for catalytic degradation of p-nitrophenol

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 409, P. 125503 - 125503

Published: July 18, 2024

Language: Английский

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