Optimizing the efficient removal of ibuprofen from water environment by magnetic carbon aerogel: kinetics, isotherms, and thermodynamic studies

Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 408, P. 125337 - 125337

Published: June 22, 2024

Language: Английский

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Collaborative adsorption and photocatalytic degradation of high concentration pharmaceutical pollutants in water using a novel dendritic fibrous nano-silica modified with chitosan and UiO-66

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 275, P. 133534 - 133534

Published: June 29, 2024

This study presents a novel hybrid mesoporous material for degrading drug pollutants in water. The materials, derived from UiO-66 metal-organic framework and chitosan, coated on nano-silica, showed excellent adsorption through hydrogen-bonding interactions efficient photodegradation of antibiotics. material's enhanced conductivity reduced band gap significantly improved pollution reduction by minimising electron-hole recombination. allows more charge transport better light absorption, boosting the ability to break down pollutants. Structural morphological analyses were conducted using various techniques, including scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, transmission Brunauer-Emmett-Teller analysis, photoelectron thermogravimetric analysis. Optimising adsorption-photodegradation process involved investigating pH, catalyst dose, radiation time. Non-linear optimisation revealed an efficiency exceeding 85 % 400 mg/L tetracycline doxycycline, model optimal parameters maximal elimination determined as pH = 4.3, mesosphere dose 4.0 mg/mL, time 10 min. Kinetic studies favored pseudo-second-order diffusion models over pseudo-first-order models. sustained after three cycles performed well real aqueous samples, removing 80 each antibiotic. demonstrates potential pharmaceutical water systems.

Language: Английский

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Efficient removal of tetracycline from water using copper MOFs/bismuth molybdate composite nano adsorbent

Desalination and Water Treatment, Journal Year: 2024, Volume and Issue: 320, P. 100589 - 100589

Published: July 9, 2024

A composite nanomaterial comprising of bismuth molybdate and copper-based MOFs (BCuM) was obtained by a facile hydrothermal technique applied as nano-adsorbent for the decontamination wastewater with tetracycline (TC). The nanosorbents' internal elemental constitution, surface morphologic features crystallite structure were analysed using EDS, SEM XRD techniques. As can be seen from kinetics adsorption, dominating forces adsorption are chemisorption. At 323 K, total sorption in accordance Langmuir isotherm reaching 354.610 mg/g. results thermodynamic analysis desorption reaction indicate that TC through BCuM occurs spontaneously is related to an intrinsic heat absorption process. findings indicated adsorbent showed excellent over pH range 3 ∼ 8 good reusability. Fourier Transform Infrared (FT-IR) spectroscopy shows this mainly function π-π bonds present system sorbent polluting substance. Composite Copper based MOF demonstrated superior properties wider application prospects treating sewage comparison single nanomaterials.

Language: Английский

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Remediation of tetracycline pollution using microplastics, green materials, membranes and sonocatalysts: a review

Environmental Chemistry Letters, Journal Year: 2024, Volume and Issue: 22(6), P. 2943 - 2975

Published: Oct. 9, 2024

Language: Английский

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Continuous Scavenging of Long-Lived Reactive Radicals for Enhancing the Photocatalytic Reduction Efficiency of Conjugated Polymers

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(13), P. 5499 - 5512

Published: March 22, 2024

Reactive radicals can significantly affect the timely exposure of catalyst's active site and lead to a significant impact on reaction rates, especially for long-lived radicals. Here, two types metal-free polymers are designed according theoretical calculations: one without acetylene, which produces more superoxide radicals, another with short-lived hydroxyl Subsequent experimental characterization revealed that polymer containing acetylene (P1-E) outperformed acetylene-free (P1) in terms photon absorption, separation photogenerated charges, photoreduction heavy metals (Cr(VI)). However, when tetracycline was introduced as radical scavenger, continuous consumption resulted 43-fold increase rate constant (k) Cr(VI) P1 system (from 0.00309 0.13248 min–1). In contrast, P1-E dominated by increased factor only 3 0.00623 0.02111 This transformation be attributed prolonged occupation sites catalyst surface free thereby inhibiting efficiency reduction reaction. their rapid annihilation exposes catalyst. Therefore, coexisting Cr(VI), there distinct differences performance catalysts Cr(VI). The same phenomenon also observed addition other contaminants (p-nitrophenol, levofloxacin, carbamazepine). study highlights removal improve photocatalytic offers new insights enhancing reactions.

Language: Английский

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Facile single-step fabrication of Z-scheme NH2-UiO-66/NH2-MIL-53 heterojunctions for enhanced photocatalytic degradation of ciprofloxacin and ofloxacin in visible light

Journal of Materials Science Materials in Electronics, Journal Year: 2024, Volume and Issue: 35(36)

Published: Dec. 1, 2024

Language: Английский

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