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Reference type: Journal
Authors: Sedghi R, Heidari B, Kazemi S
Article Title: Novel magnetic ion-imprinted polymer: an efficient polymeric nanocomposite for selective separation and determination of Pb ions in aqueous media.
Publication date: 2018
Journal: Environmental Science and Pollution Research
Volume: 25
Issue: (26)
Page numbers: 26297-26306.
DOI: 10.1007/s11356-018-2680-0

Abstract: A novel ion-imprinted polymer (IIP) toward Pb(II) recognition was synthesized on the surface of magnetic multi-walled carbon nanotubes (magnetic MWCNTs). In order to prepare magnetic functionalized-MWCNT/IIP (magnetic f-MWCNT/IIP), copolymerization of methylenebisacrylamide (MBAm) and acrylamide (AM) in the presence of dithizone-Pb(II) complex was carried out on the surface of the magnetic f-MWCNTs. Selectivity of the new synthesized sorbent toward Pb(II) and the influence of a variety of foreign ions on the recognition, preconcentration, and removal of Pb(II) were evaluated using adsorption experiments in aqueous solution. The synthesized sorbent exhibited a good affinity with high adsorption capacity (Q = 80.81-mg/g) and an excellent selectivity toward Pb(II) in comparison with other common cations including alkaline, alkaline earth, and transition metals such as Na+, K+, Mg2+, Ca2+, Cd2+, and Ni2+. The parameters such as adsorption and desorption time, adsorption capacity, effect of the sorbent mass, eluent type, concentration and volume, and also pH of the solutions were investigated. The result demonstrated that the proposed sorbent provided a fast removal and higher maximum binding capacity compared to other reported synthesized sorbents. The characteristics of the magnetic f-MWCNT/IIP were analyzed using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), vibrating sample magnetometer (VSM), and elemental analysis (EA)
Template and target information: lead ion, Pb(II)
Author keywords: ion-imprinted polymer (IIP), Magnetic MWCNTs, Ion-selective separation, Polymeric nanocomposite, Solid-Phase Extraction (SPE)

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