Effect of aluminium oxide nanoparticles on the enzymatic activity on microorganisms of activated sludge

In this study, a novel basalt embedded fiber membranes was prepared by the electrospinning method. The effects of the feed rate, voltage, tip to collector distance, and the basalt content on the prepared composite fiber membranes were investigated and optimized using the response surface method. Four models were built to compare the fibers in terms of deionized water flux (DWF), activated sludge flux, chemical oxygen demand (COD) removal, and porosity of fiber membranes. All the developed models were significant and adequately precise. The maximum flux of DWF was obtained when the voltage was 17.25 kV, the tip to collector distance of 19 cm, and a basalt content in polymer of 1.25%. COD removal decreased at higher voltage values as the feed rate increased. The porosity, pore size, and the contact angle values decreased for basalt embedded fiber membrane. The increases in the basalt percentage in polymer increased the hydrophilicity of the fiber. The flux decline for the basalt embedded fiber membrane was compared with the pristine fiber membrane. The permeate fluxes of pristine and basalt embedded fiber membranes were 42.3 and 59.6 L/m 2 /h, respectively. The biofouling performances of pristine and basalt embedded fiber membranes were also examined. Irreversible fouling decreased from 42.9% to 8.0%, and reversible fouling increased from 56.5% to 91.1% after modification of the membrane with basalt powder. Scanning electron microscopy with energy dispersive X-ray analysis (SEM-EDX) analysis showed that basalt powder was successfully embedded into polyether sulfone polymer.

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Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Saleh

Demir

Özay

et al. 2021

J of Applied Polymer Sci

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Effectiveness assessment of TiO₂-Al₂O₃ nano-mixture as a filler material for improvement of packaging performance of PLA nanocomposite films

Yakdoumi

Hadj‐Hamou

2020

Journal of Polymer Engineering

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The main objective of this study was to assess the effectiveness of TiO2-Al2O3 nano-mixture used as filler in improving packaging films performance. Polylactic acid/titanium dioxide (PLA/TiO2), polylactic acid/alumina (PLA/Al2O3) and polylactic acid/TiO2-Al2O3 (PLA/TiO2-Al2O3) nanocomposite films were successfully prepared via melt mixing process and thoroughly characterized by FTIR spectroscopy, X-ray diffraction (XRD), UV–vis spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The properties such as heat resistant, barrier, mechanical and antimicrobial properties, required for food packaging have also been investigated. As compared to the neat PLA film, the developed PLA nanocomposites have displayed superior properties particularly the PLA/ TiO2-Al2O3 nanocomposite film. This resulted material has showed a 22 °C increase in its thermal stability versus 14 and 2 °C in the cases of PLA/TiO2 and PLA/Al2O3 respectively, and a 54% reduction of its water vapor permeability in comparison with 47% for PLA/TiO2 and 39% for PLA/Al2O3. In addition, the PLA/TiO2-Al2O3 had a significant enhancement of its mechanical properties. Its Young modulus increased by 102% unlike 23.60% for the PLA/TiO2 and 44.66% for the PLA/Al2O3. It was also noticed that this nanocomposite film demonstrated stronger antibacterial activity than the two others. The bacterial growth inhibition effect of TiO2-Al2O3 nano-mixture against Pseudomonas aeruginosa and Escherichia coli bacteria was more effective than that of its two constituents.

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Effect of aluminium oxide nanoparticles on the enzymatic activity on microorganisms of activated sludge

Cited by 2 publications

References 17 publications

Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Effectiveness assessment of TiO₂-Al₂O₃ nano-mixture as a filler material for improvement of packaging performance of PLA nanocomposite films

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Effect of aluminium oxide nanoparticles on the enzymatic activity on microorganisms of activated sludge

Cited by 2 publications

References 17 publications

Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Fabrication of basalt embedded composite fiber membrane using electrospinning method and response surface methodology

Effectiveness assessment of TiO2-Al2O3 nano-mixture as a filler material for improvement of packaging performance of PLA nanocomposite films

Contact Info

Product

Resources

About

Effectiveness assessment of TiO₂-Al₂O₃ nano-mixture as a filler material for improvement of packaging performance of PLA nanocomposite films