Moringa oleifera Lam. Seeds as a Natural Solid Adsorbent for Removal of AgI in Aqueous Solutions
نویسندگان
چکیده
Este trabalho descreve o potencial de sorção das sementes de Moringa oleifera para descontaminação de Ag em soluções aquosas. Espectroscopia de infravermelho foi usada para elucidação de possíveis grupos funcionais responsáveis pela adsorção de Ag. Estudos de adsorção foram feitos em batelada usando soluções padrão de Ag como função da massa do adsorvente, tempo de extração, tamanho da partícula e pH. A Ag foi quantificada antes e após os experimentos de remoção usando espectrometria de absorção atômica por chama. Adicionalmente, considerandose os estudos de adsorção e isotermas de adsorção aplicadas ao modelo de Langmuir foi possível verificar que as sementes de M. oleifera apresentam alta capacidade de adsorção. As condições ótimas foram: 2,0g de adsorvente com tamanhos de partícula de 75-500 μm, 100 mL de solução 25,0 mg L Ag, tempo de extração de 20 min e pH 6,5. Os resultados mostram que as sementes de Moringa oleifera podem ser usadas para remoção de Ag em soluções aquosas.
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