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Estudo dos nÃveis de adsorção do vermelho do Congo utilizando nanopartÃculas de magnetite
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ISBN10: 6208602513
ISBN13: 9786208602512
Publisher: Edicoes Nosso Conhecimento
Published: Jan 28 2025
Pages: 72
Weight: 0.24
Height: 0.17 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208602512
Publisher: Edicoes Nosso Conhecimento
Published: Jan 28 2025
Pages: 72
Weight: 0.24
Height: 0.17 Width: 6.00 Depth: 9.00
Language: Portuguese
As nanopartÃculas de óxido de ferro são partÃculas de óxido de ferro com diâmetros entre cerca de 1 e 100 nanómetros. As duas formas principais são a magnetite (Fe3O4) e a sua forma oxidada maghemite (γ-Fe2O3). Estas formas têm atraÃdo grande interesse devido à s suas propriedades superparamagnéticas e à s suas potenciais aplicações em muitos domÃnios. Entre os vários métodos de sÃntese quÃmica de óxidos metálicos, o processo sol-gel oferece várias vantagens em relação a outros métodos, incluindo boa homogeneidade, baixo custo e elevada pureza. Nesta tese, nanopartÃculas de magnetita pura são sintetizadas com sucesso através do método sol-gel combinado com recozimento na faixa de temperatura de 200-400 ᵒC usando nitrato férrico e etilenoglicol como materiais de partida.O método de difração de raios X (XRD), UV / VIS, TG / DTA, SEM e técnicas de caraterização TEM, EDS, Analisador de tamanho de partÃcula (DLS) e VSM foram utilizados para obter propriedades de nanopartÃculas. Uma das aplicações das nanopartÃculas de Fe3O4 é no tratamento de águas. O vermelho Congo é um corante disazo aniónico à base de benzidina. É tóxico para muitos organismos. É utilizado em diferentes indústrias. As nanopartÃculas de magnetite foram utilizadas para a remoção do RC e como um adsorvente eficaz no tratamento de águas residuais.
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