Artículos de revistas
Kinetic And Isotherm Studies Of Ni2+adsorption On Poly(methacrylic Acid) Synthesized Through A Hierarchical Double-imprinting Method Using A Ni2+ Ion And Cationic Surfactant As Templates
Registro en:
Industrial And Engineering Chemistry Research. , v. 52, n. 25, p. 8550 - 8557, 2013.
8885885
10.1021/ie4003624
2-s2.0-84879508523
Autor
De Oliveira F.M.
Somera B.F.
Ribeiro E.S.
Segatelli M.G.
Santos Yabe M.J.
Galunin E.
Tarley C.R.T.
Institución
Resumen
A novel poly(methacrylic acid) material (IIP/CTAB) was prepared by a hierarchical double-imprinting process with Ni2+ ion and cationic surfactant - cetyltrimethylammonium bromide (CTAB) as templates, and it was employed to adsorb Ni2+ ions from aqueous medium. Other poly(methacrylic acid) materials - single-imprinted (IIP/no CTAB) and nonimprinted (NIP/no CTAB) were investigated in adsorption studies. All the synthesized polymers were characterized by FTIR, SEM, and nitrogen adsorption-desorption isotherm. The maximum Ni2+ adsorption capacities of IIP/CTAB and NIP/no CTAB were found to be 33.31 and 18.64 mg g-1, respectively, at pH 7.25. The relative selectivity coefficient (k′) values for Ni2+/Cu2+, Ni2+/Mn +, Ni2+/Co2+ and Ni2+/Pb 2+ systems were higher than 1, thus confirming the significant improvement in the selectivity of the polymer. 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