2013
DOI: 10.1590/s0100-40422013000500007
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Adsorção do corante Reativo Azul 19 em solução aquosa por lama vermelha tratada quimicamente com peróxido de hidrogênio

Abstract: ADSORPTION OF REACTIVE BLUE 19 DYE IN AQUEOUS SOLUTION BY RED MUD CHEMICALLY TREATED WITH HYDROGEN PEROXIDE. 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 o C (LVQ400) and 500 o 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 … Show more

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Cited by 12 publications
(6 citation statements)
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“…This result is in accordance with data obtained by Smiljanić et al ( 2010) which was 7.5; Liu et al (2011) with a variation of 6.9 to 7 and Smičiklas et al (2014) of 6.8. In addition, the calcination process did not cause significant changes to the surface loads of the RM as observed by Souza et al (2013) who evaluated different treatments in RM.…”
Section: Kinetic Modelmentioning
confidence: 63%
“…This result is in accordance with data obtained by Smiljanić et al ( 2010) which was 7.5; Liu et al (2011) with a variation of 6.9 to 7 and Smičiklas et al (2014) of 6.8. In addition, the calcination process did not cause significant changes to the surface loads of the RM as observed by Souza et al (2013) who evaluated different treatments in RM.…”
Section: Kinetic Modelmentioning
confidence: 63%
“…2) e de Langmuir (Eq. 3) (SOUZA; ANTUNES; CONCEIÇÃO, 2013;YAO et al, 2010), as quais foram utilizadas neste trabalho.…”
Section: Fundamentação Teóricaunclassified
“…Recentemente têm-se desenvolvido pesquisas com o objetivo de se encontrar adsorventes alternativos e de baixo custo para o tratamento de efluentes. Entre esses materiais alternativos estão resíduos da indústria e da agricultura, dentre os quais se destaca a lama vermelha, um resíduo insolúvel gerado no processo Bayer da produção do alumínio, um potencial agente de poluição devido a sua elevada alcalinidade e a grande quantidade produzida, que requer grande área para despejo, podendo provocar danos ambientais se lixiviada até os corpos de água subterrâneo (FUNGARO & BRUNO, 2009;SOUZA & ANTUNES, 2013;VIEGAS, 2016). Conhecer e controlar os parâmetros do processo é fundamental, neste âmbito pode-se aplicar o planejamento fatorial, uma importante ferramenta estatística, que possibilita a interpretação dos resultados considerando todos os parâmetros experimentais envolvidos, além de fornecer o efeito das possíveis interações entre as variáveis selecionadas (COSTA et al, 2006).…”
Section: Introductionunclassified