Avaliação da eficiência de híbridos magnéticos na remoção de ibuprofeno em água

• Ano de defesa: 2019
• Autor(a) principal: Farias, Douglas Lira de
• Orientador(a): Romão, Luciane Pimenta Cruz
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Programa de Pós-Graduação: Pós-Graduação em Química
• Palavras-chave em Português: Química; Adsorção; Ibuprofeno; Aguapé (Planta); Ferrita; Cobalto; Hibrido magnético; Ferrita de cobalto
• Palavras-chave em Inglês: Adsorption; Ibuprofen; Hybrid magnetic; Water hyacinth; Cobalt ferrite
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: http://ri.ufs.br/jspui/handle/riufs/12322

Ibuprofen (IBU) is one of the most consumed drugs in the world and much of it is eliminated in aquatic bodies, being harmful to the environment even at low concentrations. Adsorption using magnetic hybrid materials is especially attractive because the adsorbent can be easily removed from the water. aqueous medium by the simple application of an external magnetic field. In this work we synthesized the hybrid magnetic adsorbent materials AGMG and MONG, and for this purpose they were used to compose the organic phases of the adsorbents, water hyacinth biomass (AGIN) and to the second water. with high content of natural organic matter (MON) and cobalt ferrite (CoFe2O4) to compose the inorganic phase in both materials. The formation of the materials was confirmed by X-ray diffraction, which identified the cobalt ferrite phase in the synthesized materials. Infrared confirmed the materials the presence of hydroxyl and carboxylate groups from AGIN and MON, as well as Fe-O stretches characteristic of cobalt ferrite. Tests of the influence of pH on the removal of IBU showed higher percentages of removal in the range. pH 2-3 for both adsorbents with removal percentages of 100 and 86% and equilibration times of 10 and 30 min for AGMG and MONG, respectively. However with only 5 minutes of kinetic assay there was a high adsorption response of 70% for MONG and 91% for AGMG. The kinetic data fit the pseudo-second order model. The isotherm data for the AGMG and MONG fit the Langmuir model, showing good linear correlation in the concentration range studied, with determination coefficient 2 between 0.9971-0.9981. The maximum adsorbent capacity values calculated (qmax) were 11.7mg g-1 for AGMG and 1.5 mg g-1 for MONG. The Adsorbents were reused in six adsorption cycles without the use of desorption process. , and the efficiency varied in both materials. For AGMG the removal remained high in all cycles, with 100% removal in the first cycle and 70% in the sixth cycle. For MONG, the removal decreased with each cycle, reaching a removal 78% in the first cycle and 30% that in the sixth cycle. The results show that the magnetic hybrids have deficiency in IBU removal and reusability.