Response surface methodology for optimization of operational parameters to remove tetracycline from contaminated water by new magnetic Ho2MoO6/Fe2O3 nano adsorbent

Results in Engineering, Год журнала: 2024, Номер 21, С. 101746 - 101746

Опубликована: Янв. 12, 2024

World-wide, tetracycline is among the most commonly used and produced antibiotics. The entry of these chemicals into domestic sewage can result in water pollution. purpose this study to evaluate a new nano-adsorbent for separating from aquatic environments. Lab-scale batch experiments were conducted. Tetracycline removal parameters, such as temperature, adsorbent amount, initial concentration antibiotic, well contact time, investigated. Using Response Surface Methodology (Central Composite Design), effective parameters optimized appropriate model was developed predicting removal. We determined structure morphological properties nano absorbents by using Fourier transform infrared (FT-IR), X-ray powder diffraction (XRD), field emission scanning electron microscope (FE-SEM), transmission (TEM), vibrating sample magnetometer (VSM), diffuse reflectance spectroscopy (DRS) Brunauer-Emmett-Teller (BET) analysis. Data obtained practical tests compared with Langmuir Freundlich isotherms. Furthermore, adsorption kinetics studied. Results showed that best absorption, which equal 99.96 %, occurred at 30 °C, 1000 mg per liter, 20 90 min incubation. According RSM, quadratic equation calculate separation R2 = 0.9931. results studies related isotherms demonstrate process follows pseudo-second-order high ability nanocomposite absorb its ease due magnetic make an ideal choice removing water.

Язык: Английский

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Polymer-assisted synthesis of ternary magnetic graphene oxide nanocomposite for the adsorptive removal of Cr(VI) and Pb(II) ions

Heliyon, Год журнала: 2024, Номер 10(15), С. e35204 - e35204

Опубликована: Июль 26, 2024

The presence of chromium [Cr(VI)] and lead [Pb(II)] ions in the water bodies have adverse effects on humans aquatic life. Graphene oxide-based magnetic nanocomposites synthesized chitosan (mGO/CS) or polyaniline (mGO/PA) as potential adsorbents for removal Cr(VI) Pb(II) ions. FTIR (Fourier transform infrared spectroscopy), EDX (Energy dispersive X-ray), XRD (X-ray diffraction) SEM (Scanning electron microscopy) were employed to investigate chemical composition, structural, elemental analysis, crystalline size morphology nanocomposites. results confirmed synthesis by detecting peaks specific functional groups. average crystallite sizes mGO, mGO/CS, mGO/PA 17, 25, 23 (nm), respectively, determined Debye-Scherrer equation from data. Batch adsorption experiments conducted varying variables like pH, concentration metal contact time. Box Behnken design (BBD) was used optimize parameters. Under optimum conditions, mGO/CS showed maximum percentages (%R) 92.36 98.7 Pb(II), 85.25 93.08 Cr(VI), respectively. capacities 110.84 118.44 mg/g 87.74 111.7 obtained mGO/PA, pseudo-second-order kinetic model Langmuir isotherm fitted well experimental data explain mechanism nanocomposite materials both

Язык: Английский

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Magnetic Graphene based materials for removal of pharmaceutical compounds – Review on applications and machine learning approaches

Journal of Molecular Structure, Год журнала: 2025, Номер 1328, С. 141309 - 141309

Опубликована: Янв. 1, 2025

Язык: Английский

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Theoretical exploration of fullerene-based X-Y@C80 (X = in, Sb, Te) nanomaterials as sensors for Thioguanine

Diamond and Related Materials, Год журнала: 2025, Номер unknown, С. 112012 - 112012

Опубликована: Фев. 1, 2025

Язык: Английский

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Graphene oxide nanocellulose composite as a highly efficient substrate-free room temperature gas sensor

Results in Engineering, Год журнала: 2024, Номер 22, С. 102228 - 102228

Опубликована: Май 9, 2024

This study introduces the development of novel, flexible gas sensors operating at room temperature (RT), utilizing a graphene oxide (GO) via modified Hummers method and bacterial nanocellulose (BNC) composite to enhance detection in industrial environmental settings. The materials, denoted as GO@BNC, were synthesized with varying GO concentrations ranging from 2 % 30 %, aiming investigate their responsiveness gases such carbon dioxide (CO2), oxygen (O2), acetone (Ac), ethanol (Eth). prepared nanomaterials characterized using FT-IR, Raman, TGA, SEM, AFM techniques. bandgap Go ranges 4.19, 3.47, 3.16, 2.79, 2.48 eV for 2, 5, 10, 20, concentrations, respectively. Notably, sensor containing wt 20 concentration exhibited remarkable sensitivity Ac, achieving 270 increase resistance 250 μL/L. Conversely, 30% composition showed superior Eth, 420% signal enhancement under similar conditions. Further modification GO@BNC through mild reduction resulted formation reduced (rGO@BNC) composites intended assess functional groups' impact on sensing performance. Our findings underscore potential sustainable efficient materials fabricating eco-friendly devices detecting organic compounds.

Язык: Английский

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Immobilization of Phospholipase D on Fe3O4@SiO2-Graphene Oxide Nanocomposites: A Strategy to Improve Catalytic Stability and Reusability in the Efficient Production of Phosphatidylserine

Molecules, Год журнала: 2025, Номер 30(4), С. 912 - 912

Опубликована: Фев. 16, 2025

Phospholipase D (PLD) plays a pivotal role in the biosynthesis of phosphatidylserine (PS), but its practical application is constrained by limitations stability and reusability. In this study, we successfully fabricated Fe3O4@SiO2-graphene oxide (GO) nanocomposite chemical binding Fe3O4@SiO2 GO. Subsequently, PLD was immobilized onto via physical adsorption, with aim enhancing catalytic stability, reducing mass transfer resistance, improving Under optimal conditions, immobilization efficiency reached 84.4%, loading capacity 111.4 mg/gsupport. The pH for PS production shifted from 6.0 to 6.5, while temperature increased 45 °C 50 °C. Notably, demonstrated shorter reaction time higher yield, achieving 95.4% yield within 90 min, compared free (78.1% 150 min), representing 1.04-fold improvement efficiency. Furthermore, exhibited outstanding storage thermal along remarkable Even after being reused 10 cycles, still stays as high 78.3%. These findings strongly suggest that Fe3O4@SiO2-GO has potential efficient PS.

Язык: Английский

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Pineapple leaf-derived TEMPO-oxidized cellulose nanospheres and graphene oxide composite: a green solution for ciprofloxacin adsorption

Cellulose, Год журнала: 2025, Номер unknown

Опубликована: Фев. 26, 2025

Язык: Английский

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Multifunctional Magnetic Nanoparticles in Water and Wastewater Treatment

Royal Society of Chemistry eBooks, Год журнала: 2025, Номер unknown, С. 244 - 272

Опубликована: Май 7, 2025

Currently, scientists worldwide are facing the challenge of solving problem water pollution. Pollutants coming mainly from industrial activity, including toxic metals, dyes and antibiotics, reach bodies, resulting in their contamination. In this context, environmental remediation is key to preserving environment, for which various technologies have been used over years, present drawbacks based on times, efficiencies costs. recent development nanomaterials applied treatment has allowed resolving limitations conventional technologies. Among them, use magnetic nanoparticles highlighted easy manipulation, thanks intrinsic magnetism, especially those formed by metal oxides. The tendency oxides agglomerate resolved through surface modification chemical functionalization, turn allows removal specific analytes selective interactions with certain functional groups. Based above, book chapter proposes a review most advances (2020–2023) functionalized metals organic compounds wastewater samples. Different parameters discussed, us understand processes, along capacity reuse, synthesis characterization, addressing current challenges future perspectives.

Язык: Английский

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Study of controlled pulsed illumination (CPI) efficiency in the homogeneous UV-LED/S2O82− process for the removal of organic dye from contaminated water

Results in Engineering, Год журнала: 2024, Номер 21, С. 101792 - 101792

Опубликована: Янв. 15, 2024

The present investigation aims to shed light on the efficiency of irradiation-based advanced oxidation processes using controlled pulsed illumination (CPI) in a homogeneous process. A more in-depth emphasis has been applied considering ultraviolet-light emitting diodes/persulfate (LED/S2O82−) system. Irradiation-driven can unexpected behaviour under irradiation compered continuous irradiation. This be explained by Parrando's paradox concept. removal organic dyes source was compared CPI system employing UV-LED/S2O82− photoreactor explore performance. UV-LED/PS method investigated three as model pollutants and duty cycle pulse period parameters source. have crucial impact efficiencies, which were studied values 10 %, 25 50 75 90 99 % for periods from 1 ms (ms) few hundred current study. For all experiments, electrical energy consumption (EEO) calculated, values. According results, cycles (10 800 ms), with EEO amounts 58.29, 120.65, 29.62 kWh per order showed best performance dyes, respect other experiments terms saving energy. Besides, game theory collision hypothesis scrutinized justify achieved results.

Язык: Английский

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Removal of Cephalexin-Antibiotic from Drinking Water by Designing CaCl2 Incorporated Chitosan Co- Tragacanth Gum Composite Hydrogel

Journal of Health and Rehabilitation Research, Год журнала: 2024, Номер 4(1), С. 1442 - 1449

Опубликована: Март 21, 2024

Background: The prevalence of antibiotic contaminants in aquatic environments presents a critical challenge to public health, necessitating the development efficient removal methods. Emerging pollutants, especially antibiotics, have been implicated rise antibiotic-resistant bacteria, threatening ecological balance and human well-being. Objective: This study aims synthesize evaluate efficacy CaCl2-based composite hydrogel using chitosan as biopolymer for adsorption pollutants from water, targeting improvement water purification technologies healthcare settings. Methods: Chitosan-based hydrogels were synthesized via free radical polymerization, incorporating CaCl2 utilizing techniques such Field Emission Scanning Electron Microscopy (FESEM) morphology analysis, Energy-dispersive X-ray (EDX) analysis elemental verification, Fourier-transform infrared spectroscopy (FTIR) functional group identification, diffraction (XRD) determine crystallinity. Physicochemical parameters, including contact time, pH, temperature, reusability, swelling behavior various media, systematically assessed ascertain hydrogel's adsorptive performance. Results: demonstrated porous rough surface ideal adsorption, with an initial rate 80% within 30 minutes time. FTIR confirmed presence groups corresponding absorption bands at 1053, 1415, 1601, 2600, 2900, 3300, 3500 cm-1. EDX XRD analyses affirmed incorporation CaCl2, crystalline phase characterized by sharp peaks. maximum efficiency reached 95% optimized adsorbent dose 0.05 g. Conclusion: exhibits significant potential suggesting viable approach mitigate environmental impact pharmaceutical enhance health reducing spread resistance.

Язык: Английский

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