Hydroxyl radicals in ozone-based advanced oxidation of organic contaminants: A review

Environmental Chemistry Letters, Год журнала: 2024, Номер unknown

Опубликована: Сен. 2, 2024

Язык: Английский

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TPA and PET Photo-Degradation by Heterogeneous Catalysis Using a (Al2O3)0.75TiO2 Coating

Surfaces, Год журнала: 2025, Номер 8(2), С. 34 - 34

Опубликована: Май 21, 2025

The combination of the catalytic properties Al2O3/TiO2 formed an efficient system to degrade ubiquitous pollutants TPA and PET. coating (Al2O3)0.75TiO2 was characterized by X-ray diffraction. Stainless steel disks with photo-catalyst were placed transversely in a 3.0 L vertical glass reactor ascending airflow for supplying oxygen reaction medium visible light lamps photo-activation. analysis homogeneity, morphology particle size distribution TiO2 coatings confirmed SEM. Optical band-gap energy calculated using Tauc equation. UV–Vis spectrophotometry (UV–Vis) chemical demand (COD) quantitative techniques measure reduction initial PET concentrations.

Язык: Английский

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Study on Fe-Co/γ-Al2O3 ozone-catalyzed degradation of coking reverse osmosis concentrates

Journal of Water Process Engineering, Год журнала: 2025, Номер 70, С. 107080 - 107080

Опубликована: Янв. 24, 2025

Язык: Английский

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Synergistic Degradation of Organic Contaminants in Landfill Leachates Using Catalytic Ozonation with Magnetite

Sci, Год журнала: 2025, Номер 7(1), С. 31 - 31

Опубликована: Март 6, 2025

This study evaluated the efficiency of catalytic ozonation with magnetite (Fe3O4) in degrading recalcitrant organic compounds leachates from two sanitary landfills Colombia. The optimum treatment conditions were also analyzed by means a response surface design, resulting 6 g O3/h, 2.5 g/L Fe3O4, and pH 9, which resulted COD removal rates 85.3% El Guayabal 75.8% La Madera. Moreover, BOD5/COD ratio increased 0.26 to 0.38 0.23 0.32, respectively, suggesting effluent biodegradability. most efficient ozone consumption (2.7 O3 per gram removed) was obtained under alkaline high catalyst concentration. Magnetite demonstrated structural stability, although its progressively decreased after three cycles use, decreasing 73.6%. These findings validate as an alternative for advanced leachate treatment, potential optimize contaminant industrial effluents strengthen environmental remediation strategies.

Язык: Английский

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Comparative Study on the Catalytic Ozonation of Biotreated Landfill Leachate Using γ-Al2O3-Based Catalysts Loaded with Different Metals

Sustainability, Год журнала: 2025, Номер 17(10), С. 4376 - 4376

Опубликована: Май 12, 2025

Global municipal solid waste (~2B tons/year) affects sustainability, as landfill and incineration face persistent leachate contamination, demanding effective management to advance water recycling circular economies. Accelerated investigation of hybrid biocatalytic ozonation systems is imperative enhance contaminant removal efficiency for stringent discharge compliance. This study investigates the catalytic effects γ-Al2O3-based catalysts loaded with different metals (Cu, Mn, Zn, Y, Ce, Fe, Mg) on biochemical effluent leachate. The were synthesized via a mixed method subsequently characterized using scanning electron microscopy (SEM) X-ray diffraction (XRD). Pseudo-second-order kinetics revealed active metal loading’s impact adsorption capacity, Cu/γ-Al2O3 Mg/γ-Al2O3 achieving highest Qe (0.85). To elucidate differential degradation performance among catalysts, ozone/oxygen gas mixture was introduced at controlled flow rate. Experimental results demonstrate that catalyst, exhibiting optimal comprehensive performance, achieved COD TOC efficiencies 84.5% 70.9%, respectively. UV–vis absorbance ratios following disparities: aromatic compound efficiency; Ce/γ-Al2O3 excelled in macromolecular organics degradation. EEM-PARAFAC analysis fluorophore removal: exhibited broad efficacy across all five components, while demonstrated C2 C4, but showed limited toward C5. These findings provide important insights into selecting practical engineering applications treatment. aims catalyst formulation-dependent disparities, guiding quality-specific selection ultimately efficiency.

Язык: Английский

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Enhanced degradation and removal of ciprofloxacin and ofloxacin through advanced oxidation and adsorption processes using environmentally friendly modified carbon nanotubes

Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(20), С. 29957 - 29970

Опубликована: Апрель 10, 2024

Язык: Английский

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Comparative Studies on Photo-Degradation of Landfill Leachate Using TiO2 Doped Fe2O3 and Cu

Iranian Journal of Science and Technology Transactions of Civil Engineering, Год журнала: 2024, Номер unknown

Опубликована: Авг. 30, 2024

Язык: Английский

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