REMOÇÃO DE CORANTES EM EFLUENTE TÊXTIL UTILIZANDO BIOCARVÃO DE FOLHAS DE Persea americana Mill.: ESTUDO ISOTÉRMICO E COLUNA DE ADSORÇÃO
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A indústria têxtil gera grandes volumes de efluentes com alta concentração de corantes. O tratamento destes efluentes com adsorventes alternativos têm sido investigado. Estudos preliminares demonstraram que o biocarvão produzido com folhas de Persea americana Mill. foi eficiente na remoção de corantes. Assim, de forma complementar, o presente trabalho avaliou a eficiência de remoção dos corantes Levafix Brilliant Red e Remazol Preto B em efluente têxtil sintético com o adsorvente em duas etapas: a) estudos isotérmicos e b) ensaios em coluna de adsorção com fluxo contínuo. Cinco modelos isotérmicos foram estudados. O modelo de Langmuir foi o que melhor se ajustou aos dados, com RL de 0.001, indicando que a adsorção é favorável. Nas colunas de adsorção, a capacidade máxima de adsorção dos corantes foi de 8.71 mg.g-1 de adsorvente. Logo, o estudo demonstrou que o adsorvente alternativo pode ser utilizado para remoção eficiente dos corantes em processo contínuo.
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