Síntese, caracterização e aplicação de biossorvente híbrido nanomodificado (BNM) a partir de resíduo de levedura da indústria sucroalcooleira impregnado com nanopartículas ferromagnéticas (Fe3O4)

• Ano de defesa: 2017
• Autor(a) principal: Debs, Karina Bugan [UNIFESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de São Paulo
• Palavras-chave em Português: Development of composites; Textile wastewater; Magnetite nanoparticles; Oils removal; Water treatment; Desenvolvimento de compósitos; Efluente têxtil; Nanopartículas de magnetita; Remoção de óleos; Tratamento de águas
• Link de acesso: https://sucupira.capes.gov.br/sucupira/public/consultas/coleta/trabalhoConclusao/viewTrabalhoConclusao.jsf?popup=true&id_trabalho=5139904; http://repositorio.unifesp.br/handle/11600/49917

The clean water access is a global problem that concerns the organizations involved in public health. In this context, the employment of hybrid nanomodified biosorbent (NMB) from yeast residue of ethanol industry, impregnated with magnetite nanoparticles (Fe3O4), for oils and dyes removal from aqueous solution were investigated. The oils studies revealed that temperature is the most relevant parameter in the oil removal process. The best removal for new motor oil and petroleum 28 °API happened at low temperatures, and were, respectively, 3522  118 g kg-1 e 2157  281 g kg-1. However, for mixed used motor oils, the removal was 2841  280 g kg-1, presenting this result at higher temperatures. All the experimental data followed the D-optimum and neural network models. Regarding the dyes, the composite showed a similar sorption capacity than the yeast biomass. Therefore, the composite uses were justified due to the simple and fast removal of the material from aqueous medium when a magnetic field is applied. In methylene blue sorption, both, yeast biomass and the composite, were well adjusted to SIPS model, which is a combination of Langmuir and Freundlich models, showing that the sorption process includes chemicals and physicals phenomenon’s. The magnetite nanoparticles have low affinity with methylene blue, indicating that, in the composite, some interactions occur between the nanoparticles and the yeast biomass. In textile wastewater sorption, the composite and yeast biomass sorption capacity were, respectively, 10,9  0,5 mg g-1 e 13,0  2,0 mg g-1.