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Removal of Pb2+ Ions onto Magnetic Graphene/Nylon 6: Optimized by Taguchi Method

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Abstract

A novel sorbent consisting of graphene, Fe3O4 and nylon-6 is described for removal of Pb2+ ions. Graphene has high surface area, Fe3O4 lets the nanocomposite to be controllable via magnetic field and nylon-6 increases active negative sites. Accordingly, the nanocomposite can be a good candidate to be a magnetic sorbent. Graphene oxide was prepared via modified Hummer’s method and magnetized by precipitation of Fe3O4. The modification of magnetic nanocomposite was done through dispersion of the composite in solution of nylon-6. X-ray diffraction, scanning electron microscopy, electron diffraction spectroscopy and Fourier-transform infrared spectroscopy were used to characterize the nanocomposite. The optimum adsorption conditions were achieved through Taguchi method, which decreased the optimization time and usage amount of mGN6. Regarding to the data, pH of 9, sorbent amount of 10 mg and Pb2+ concentration of 6 mg L−1 were optimum conditions. The actual value from optimized level condition was 97%. In comparison with other sorbents used for Pb2+ removal and determination with FAAS, mGN6 has serious improvements including more capacity adsorption and less usage amount of sorbent. The co-existing ions effect was examined. The Freundlich model and the pseudo second-order model confirmed isotherm adsorption and kinetic adsorption behaviors, respectively.

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Authors and Affiliations

  1. Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran

    Seyed Yadollah Mirnezami, Mehran Davallo, Mahmoudreza Sohrabi, Morteza Khosravi & Fereshteh Motieea

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  1. Seyed Yadollah Mirnezami
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  2. Mehran Davallo
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  3. Mahmoudreza Sohrabi
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  5. Fereshteh Motieea
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Correspondence to Mehran Davallo.

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Mirnezami, S.Y., Davallo, M., Sohrabi, M. et al. Removal of Pb2+ Ions onto Magnetic Graphene/Nylon 6: Optimized by Taguchi Method. J Inorg Organomet Polym 30, 3531–3539 (2020). https://doi.org/10.1007/s10904-020-01498-6

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  • DOI: https://doi.org/10.1007/s10904-020-01498-6

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