Adsorção do corante reativo azul 19 em solução aquosa por lama vermelha tratada quimicamente com peró:xido de hidrogênio
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Data
2013-08-05
Autores
De Souza, Kelli Cristina [UNESP]
Antunes, Maria Lúcia Pereira [UNESP]
Da Conceição, Fabiano Tomazini [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Adsorption of Reactive Blue 19 dye onto activated red mud was investigated. Red mud was treated with hydrogen peroxide (LVQ) and heated at both 400 °C (LVQ400) and 500 °C (LVQ500). These samples were characterized by pH, specific surface area, point of zero charge and mineralogical composition. Adsorption was found to be significantly dependent on solution pH, with acidic conditions proving to be the most favorable. The adsorption followed pseudo-second-order kinetics. The Langmuir isotherm was the most appropriate to describe the phenomenon of dye removal using LVQ, LVQ400 and LVQ500, with maximum adsorption capacity of 384.62, 357.14 and 454.54 mg g-1, respectively.
Descrição
Palavras-chave
Adsorption, Reactive dye, Red mud
Como citar
Quimica Nova, v. 36, n. 5, p. 651-656, 2013.