Use of organophilic Bofe clay in removing oily contaminants / Uso de argila Bofe organofílica na remoção de contaminantes oleosos

Rochelia Silva Souza Cunha, Joseane Damasceno Mota, Anna Karoline Freires de Sousa, Meiry Gláucia Freire Rodrigues

Abstract


A modificação de argilominerais em organofílica pela incorporação do surfactante é extremamente importante em questões ambientais e industriais porque faz com que a argila atraia contaminantes hidrofóbicos e outros compostos orgânicos apolares. Uma argila Bofe foi utilizada como matéria-prima para a preparação de argila organofílica sintetizada com cloreto de cetiltrimetilamônio. As propriedades de sorção desta organofílica foram avaliadas para remover o óleo. A organofílica foi preparada por método direto e caracterizada por difração de raios-X, adsorção-dessorção de N2, capacidade de troca catiônica, espectroscopia na região do infravermelho, teste de expansão (capacidade de adsorção e inchamento de Foster). Foram realizadas medições para avaliar o desempenho das reações de troca iônica e grau de afinidade com derivados de petróleo. O aumento significativo em d(001) de CTAC-BC mostra a incorporação efetiva de CTAC nas camadas de argila. Os resultados de DRX e infravermelho indicaram que o CTAC foi intercalado entre as camadas de argila. Com base no sistema batelada, fica evidente que o CTAC-BC tem potencial para remover 99,35 % da concentração inicial de gasolina e 98,54 % da concentração inicial de óleo diesel. Os dados experimentais obtidos com um conjunto de técnicas (difração de raios X e espectroscopia de infravermelho) evidenciam que o CTAC-BC apresenta excelente afinidade com a gasolina e o diesel. O alto percentual de remoção de contaminantes oleosos justifica o uso da argila organofílica no sistema de remoção de óleo/água.


Keywords


Organofilização, surfactante CTAC, capacidade de sorção e remoção, Gasolina, Diesel, óleo emulsionado.

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DOI: https://doi.org/10.34117/bjdv.v7i5.29601

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