Synergistic interactions and reaction mechanisms of biochar surface functionalities in antibiotics removal from industrial wastewater

Environmental Pollution, Journal Year: 2024, Volume and Issue: 356, P. 124365 - 124365

Published: June 11, 2024

Language: Английский

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Endogenous iron-enriched biochar loaded nickel-foam cathode in electro-Fenton for ciprofloxacin degradation: performance, mechanism and DFT calculation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155446 - 155446

Published: Sept. 2, 2024

Language: Английский

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Silica aerogels modified with vinyl, epoxide, methacrylate moieties for the removal of ciprofloxacin by adsorption from water

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 129112 - 129112

Published: Aug. 6, 2024

Water pollution caused by antibiotic effluents, particularly ciprofloxacin is a growing environmental concern. To address this problem, silica aerogels containing vinyl, epoxide, or methacrylate organic functionalities were synthesized through facile sol–gel synthesis under ambient conditions and employed as adsorbents in study. The physicochemical structural features of the materials characterized using conventional complementary techniques. Structural characterization confirmed successful chemical functionalization surface for all samples. Similar to pristine aerogel, vinyl-functionalized aerogel displayed typical mesoporous network, whereas epoxide dominantly macroporous structures. Batchwise sorption experiments performed different operating conditions. results equilibrium kinetic adsorption studies showed excellent alignment with Langmuir isotherm pseudo-second-order models, respectively. Under optimum (C0 = 100 mg/L, mads/Vsoln 0.5, pH=6, t 90 min), capacities onto methacrylate-modified 62.7, 45.8 47.8 mg/g, Despite differences at micro- meso- macrostructure level, obtaining similar adsorptive performances confirms that mechanism not only relied on pore filling but also controlled molecular interactions. exhibited repetable performance least six cycles.

Language: Английский

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Insight into adsorption-desorption of methylene blue in water using zeolite NaY: kinetic, isotherm and thermodynamic approaches

Results in Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 16, P. 100281 - 100281

Published: Aug. 1, 2024

It is critical to find an efficient method separate methylene blue (MB) in wastewater before discharging them into environment. Adsorption using zeolites the most commonly used one. To determine adsorption mechanism providing useful data enhance capacity and practicability of scale-up, kinetic, isotherm thermodynamic were evaluated discussed intensely. Zeolite NaY was synthesized from rice husk ash with a one-stage process. Effects pH, contact time, initial concentration, adsorbent dose, temperature, solvents recyclic stability on MB desorption investigated detail via alternating variable method. Optimal conditions for at pH 8, 1 hour, 50 mgMB/L, 303K. kinetics isotherms showed that process fitted pseudo-second-order, Freundlich Temkin isotherm, indicating spontaneous, exothermic physical multilayer adsorption. Desorption EtOH:H2O (1:1) solvent 323K optimal releasing its studies revealed this favorable rising temperature. The maximum calculated as 49 mg/g could maintain performance after six cycles. Generally, study provided comprehensive approach efficient, cost-effective, recyclable removal water.

Language: Английский

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High-efficiency removal of ciprofloxacin by persulfate activated with 3D Bi2WO6/g-C3N4/GA Z-scheme heterojunction under simulated sunlight

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 63, P. 105490 - 105490

Published: May 18, 2024

Language: Английский

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Polystyrene-reduced graphene oxide composite as sorbent for oil removal from an Oil-Water mixture

Chemical Engineering Science, Journal Year: 2024, Volume and Issue: 298, P. 120383 - 120383

Published: June 15, 2024

This study enhanced the adsorptive capacity of polystyrene (PS) by infusing reduced graphene oxide (rGO) nanoparticles obtained from synthesis to produce PS-rGO composites via electrospinning method. Physicochemical characterization as-synthesized rGO and were carried out through scanning electron microscopy, N2 physisorption among others. Oil sorption performance synthesized in crude oil, vegetable fresh engine oil used are 130.96 g/g, 121.77 105.01 g/g 100.56 g/g. capacities electrospun pure PS 46.32 38.54 35.14 32.57 those infused with 4 wt% found be 105.52 98.86 86.25 83.47 for samples respectively. Pseudo second order (PSO) kinetic model fits data four on composite sorbents produced. Intra-particle diffusion (IPD) evidently showed that sorbents, occurred three (3) phases. Composites demonstrate high adsorption capacity, reusable upto sorption–desorption cycles.

Language: Английский

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Removal of fluoroquinolone antibiotic from wastewater based on immobilized metal affinity mechanism

International Journal of Environmental Science and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

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Exploring interface interactions in antibiotics adsorption on bentonite-alginate composite: Insights from advanced simulations and adsorption isotherms modeling

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106038 - 106038

Published: Feb. 1, 2025

Language: Английский

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Synthesis of iron oxide/activated hydrochar composite from residual brewery biomass for remediation of water contaminated with chlorophenol

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 28, 2025

This study presents the development of iron oxide/activated hydrochar composites from brewer's spent grain (BSG) to remove 2-chlorophenol (2-CP) water via adsorption and Fenton oxidation. Two synthesis methods were employed: (1) incipient wetness impregnation hydrothermal carbonization (FeOHC) (2) chemical coprecipitation oxide onto surface (FeOHC-C). Characterization revealed mesoporous structures with areas ranging 44 66 m² g⁻¹ magnetite (Fe₃O₄) as predominant phase. Adsorption studies demonstrated equilibrium capacities 24.63 mg for FeOHC 18.70 FeOHC-C, kinetics best described by Elovich model behavior fitting Sips isotherm, suggesting a heterogeneous monolayer process. Thermodynamic analysis confirmed that was spontaneous exothermic, primarily driven physical interactions, including hydrogen bonding, π-π electrostatic attraction. oxidation experiments 2-CP degradation most efficient under acidic neutral conditions (pH 3.0-6.0), diminishing drastically at alkaline conditions. The fact good results obtained pH demonstrates its practical applicability. Reusability tests long-term stability materials, FeOHC-C maintaining sustained catalytic performance over multiple cycles. These findings highlight dual functionality adsorbents self-regenerating catalysts, offering promising scalable solution remediation chlorinated organic pollutants in water.

Language: Английский

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New approach for adsorptive removal of the antibiotic ciprofloxacin: carboxymethyl-dextran-functionalised magnetic iron oxide nanomaterials

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 144006 - 144006

Published: May 1, 2025

Language: Английский

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