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Synthesis, Characterization, and Application of TiO2–Magnetite/Chitosan Nanocomposite for Adsorptive Removal of Naphthalene from Aqueous Solutions

Synthesis, Characterization, and Application of TiO2–Magnetite/Chitosan Nanocomposite for... This study demonstrates the synthesis of titanium oxide-magnetite/chitosannanocomposite (TiO2–MNPs/CT) whereTiO2 nanoparticles were precipitated onto preparedMNPs followed by immobilization onto CT. The prepared nanocomposite wasinvestigated using scanning electron microscopy, X-ray diffraction spectrometry,and Fourier transform infrared spectrometry. The nanocomposite was applied foradsorptive removal of naphthalene, which is the most prevalent compound of themost hazardous polycyclic aromatic hydrocarbon, from aqueous solutions. Theparameters assumed to considerably controlling the removal process wasoptimized. The highest removal efficiency (98%) with the maximum adsorptioncapacity (49.7 mg/g) was obtained at pH 7, adsorbent concentration 2 g/L, andcontact time 24 h. The experimental results were analyzed using isotherm modelsincluding Langmuir, Freundlich, and Dubinin–Radushkevich, which revealedmultilayer adsorption with maximum adsorption capacity of 60.48 mg/g. Thekinetic studies showed good fit for the experimental results with pseudo-secondorder model referring to the presence of chemical adsorption. Furthermore, thespent adsorbent particles were regenerated via shaking with ethanol for 60 minand studied in repeated adsorption cycles. Slight decrease after the fifthadsorption-regeneration cycle was observed, indicating good stability of thenanocomposite against regeneration.[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Petroleum Chemistry Springer Journals

Synthesis, Characterization, and Application of TiO2–Magnetite/Chitosan Nanocomposite for Adsorptive Removal of Naphthalene from Aqueous Solutions

Petroleum Chemistry , Volume 62 (7) – Jul 1, 2022

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References (42)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2022. Translated from Neftekhimiya, 2022, Vol. 62, No. 5, pp. 701–714 https://doi.org/10.31857/S0028242122050094.
ISSN
0965-5441
eISSN
1555-6239
DOI
10.1134/s0965544122010066
Publisher site
See Article on Publisher Site

Abstract

This study demonstrates the synthesis of titanium oxide-magnetite/chitosannanocomposite (TiO2–MNPs/CT) whereTiO2 nanoparticles were precipitated onto preparedMNPs followed by immobilization onto CT. The prepared nanocomposite wasinvestigated using scanning electron microscopy, X-ray diffraction spectrometry,and Fourier transform infrared spectrometry. The nanocomposite was applied foradsorptive removal of naphthalene, which is the most prevalent compound of themost hazardous polycyclic aromatic hydrocarbon, from aqueous solutions. Theparameters assumed to considerably controlling the removal process wasoptimized. The highest removal efficiency (98%) with the maximum adsorptioncapacity (49.7 mg/g) was obtained at pH 7, adsorbent concentration 2 g/L, andcontact time 24 h. The experimental results were analyzed using isotherm modelsincluding Langmuir, Freundlich, and Dubinin–Radushkevich, which revealedmultilayer adsorption with maximum adsorption capacity of 60.48 mg/g. Thekinetic studies showed good fit for the experimental results with pseudo-secondorder model referring to the presence of chemical adsorption. Furthermore, thespent adsorbent particles were regenerated via shaking with ethanol for 60 minand studied in repeated adsorption cycles. Slight decrease after the fifthadsorption-regeneration cycle was observed, indicating good stability of thenanocomposite against regeneration.[graphic not available: see fulltext]

Journal

Petroleum ChemistrySpringer Journals

Published: Jul 1, 2022

Keywords: naphthalene; polycyclic aromatic hydrocarbon; nanocomposite; adsorption; chitosan; titanium oxide; magnetite

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