Efficient removal of carmoisine dye from aqueous solution using Fe3O4 magnetic nanoparticles modified with asparagine

In the present study, Fe3O4@SiO2-NH2-Asn magnetic nanoparticles (MNPs) were prepared and used for the first time as an efficient adsorbent for the removal of Carmoisine dye from aqueous solutions. Characterization of the synthesized adsorbent was performed by transmission electron microscopy, field...

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Bibliographic Details
Published in:Desalination and water treatment 2021-07, Vol.229, p.441-451
Main Authors: Mostashari, Seyedeh Zahra, Shojaei, Abdollah Fallah, Tabatabaeian, Khalil, Kefayati, Hassan, Shariati, Shahab
Format: Article
Language:English
Subjects:
Asparagine
Carmoisine
Dye
Fe3O4@SiO2-NH2-Asn
Magnetite
Removal
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Summary:In the present study, Fe3O4@SiO2-NH2-Asn magnetic nanoparticles (MNPs) were prepared and used for the first time as an efficient adsorbent for the removal of Carmoisine dye from aqueous solutions. Characterization of the synthesized adsorbent was performed by transmission electron microscopy, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and vibrating sample magnetometer instruments. Taguchi experimental design method (OA16) was utilized to evaluate the effect of adsorption parameters on the dye removal efficiency from aqueous solutions. Experimental results showed 96.6% removal efficiency of Carmoisine dye from aqueous solutions at pH = 3, adsorbent weight = 0.08 g, ionic strength = 0.05 mol L–1, and contact time = 20 min. The adsorption isotherm studies with Freundlich, Langmuir, and Temkin isotherm models revealed that the adsorption data were best fitted to the Freundlich model (R2 = 0.9989, n = 0.19), which showing multilayer adsorption of the dye on the adsorbent surface. The kinetic data were investigated by pseudo-first-order, pseudo- second-order, intra-particle diffusion, and Elovich kinetic models. According to obtained data, the pseudo-second-order kinetic model was the best model for describing the adsorption kinetic (R2 = 0.9999). In addition, the Fe3O4@SiO2-NH2-Asn MNPs could be easily recovered by an external magnet and it displayed reusability for the subsequent seven runs. The results of Carmoisine removal from real samples showed that the Fe3O4@SiO2-NH2-Asn MNPs are appropriate adsorbents for the elimination of this pollutant from aqueous media.
ISSN:1944-3986
1944-3986
DOI:10.5004/dwt.2021.27404