Desenvolvimento de nanocompósitos poliméricos magnetizados pela técnica de Eletrofiação visando estudos de remoção de chumbo (II) em água

Abstract

In this work, different materials were evaluated as adsorbent for lead ions (Pb2+) present in aqueous solution: magnetic nanoparticles composed by manganese ferrite, cellulose diacetate membranes produced by electrospinning and composites of these materials. These materials were also tested after thermal treatment in inert atmosphere. Adsorption essays were carried out in solutions presenting different pH values in order to evaluate eventual interference in the adsorption capacity of the adsorbents. The produced materials were characterized by Fourier transformed infrared spectrometry, thermogravimetric analysis, X-ray diffraction and atomic absorption spectrometry. Considering solution pH, the experiments carried out in pH 7.0 presented the best adsorption results when compared to those carried out in pH 3.0 and 5.0. The best results of Pb2+ removal were obtained for cellulose diacetate membranes that received thermal treatment, as well as the composite containing magnetic nanoparticles obtained by the same methodology. However, the presence of magnetic nanoparticles is justified due to the ease of removing the adsorbent from the system.