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

Environmental Chemistry Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

Language: Английский

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

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 70, P. 107080 - 107080

Published: Jan. 24, 2025

Language: Английский

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

Sci, Journal Year: 2025, Volume and Issue: 7(1), P. 31 - 31

Published: March 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.

Language: 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, Journal Year: 2025, Volume and Issue: 17(10), P. 4376 - 4376

Published: May 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.

Language: 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, Journal Year: 2024, Volume and Issue: 31(20), P. 29957 - 29970

Published: April 10, 2024

Language: 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, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 30, 2024

Language: Английский

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