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Journal of Nanostructures، جلد ۱۲، شماره ۲، صفحات ۲۶۲-۲۷۸
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عنوان انگلیسی Magnetized Nanocomposite of Sea Shell and Walnut Shell-waste as Adsorbent for Efficient Removal of Methylene Blue
چکیده انگلیسی مقاله In this paper, nano magnetized composite of sea shell (SS) and walnut shell-waste based activated carbon (WAC), (SS/WAC/Fe3O4), was synthesized and used for the removal of methylene blue (MB) from an aqueous solution. Field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), Fourier-Transform infrared (FT-IR) spectroscopy, X-ray diffraction analysis (XRD) and UV-Vis were used to characterize the SS/WAC/Fe3O4 nanocomposite. The SS/WAC/Fe3O4 nanocomposite proved to be an effective adsorbent in the adsorption of methylene blue (MB) in the optimized effective parameters. Effective parameters such as pH, adsorption time (min), adsorbent dosage (g/L) and initial dye concentration were optimized with Box-Behnken Design (BBD). Optimal adsorption conditions including pH=6.5, dye concentration of 4.0 mg L-1, adsorbent amount of 0.232 g L-1 and contact time of 40 min were obtained. Fitting the experimental equilibrium data to various isotherm models such as Langmuir and Freundlich models show the suitability and applicability of the Langmuir model. The maximum monolayer sorption capacity was 37.2 mg g-1. More than 93% removal efficiency for MB dye showed that this adsorbent is an effective natural compound and also inexpensive for treatment processes. Therefore, using this method and process to remove dye pollutants from aqueous media is recommended.
کلیدواژه‌های انگلیسی مقاله Box-Behnken Design, dye removal, magnetic iron oxide nanocomposite, Methylene blue, Seashell powder, walnut activated carbon
نویسندگان مقاله Maryam Bordbar |
Department of Chemistry, Faculty of Science, University of Qom, Qom 37185-359, Iran

Neda Negahdar |
Department of Chemistry, Faculty of Science, University of Qom, Qom 37185-359, Iran

Bahar Khodadadi |
Department of Chemistry, Faculty of Science, University of Qom, Qom 37185-359, Iran

نشانی اینترنتی https://jns.kashanu.ac.ir/article_111618_09f258896d49fd210e4b8f680b3038ef.pdf
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