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Issue 89, 2015
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Development of a novel magnetite–chitosan composite for the removal of fluoride from drinking water: adsorption modeling and optimization

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Abstract

Magnetic nanoparticles (MNPs) have recently been adopted by researchers in the field of adsorption/biosorption for separation of pollutants from aqueous solutions. In this paper, chitosan was impregnated with magnetite nanoparticles through a chemical co-precipitation method to fabricate hybrid adsorbents of Fe3O4–chitosan. The physicochemical and structural properties of the adsorbent were characterized, and then the performance of the adsorbent was evaluated for fluoride removal from water. The operational factors affecting the adsorption process, including pH, contact time, adsorbent dosage, initial fluoride concentration, and temperature, were studied. Various isotherm and kinetic models were also used to evaluate the fit of the experimental data with the modeled results. The equilibrium data were well described by the Freundlich model. The kinetics of the adsorption process followed the pseudo-second-order model. Recycling results suggested that the Fe3O4–chitosan particles maintain a great reusability potential for five consecutive cycles. Findings also showed that the Fe3O4–chitosan can be easily regenerated via acid treatment. The results of the present work highlighted the potential of using the Fe3O4–chitosan magnetic composite for the removal of fluoride from water. In conclusion, Fe3O4–chitosan can be considered as an appropriate adsorbent for fluoride removal from water, because it can be separated both quickly and easily, it has high efficiency, and it does not lead to secondary pollution.

Graphical abstract: Development of a novel magnetite–chitosan composite for the removal of fluoride from drinking water: adsorption modeling and optimization

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Publication details

The article was received on 13 Jun 2015, accepted on 24 Aug 2015 and first published on 24 Aug 2015


Article type: Paper
DOI: 10.1039/C5RA11294J
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Citation: RSC Adv., 2015,5, 73279-73289

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    Development of a novel magnetite–chitosan composite for the removal of fluoride from drinking water: adsorption modeling and optimization

    A. Mohseni-Bandpi, B. Kakavandi, R. R. Kalantary, A. Azari and A. Keramati, RSC Adv., 2015, 5, 73279
    DOI: 10.1039/C5RA11294J

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