Uso de arcillas argentinas naturales y calcinadas para la remoción de Cd(II) de soluciones acuosas

Gisele Portela; Alejandra Tironi; Claudia Cecilia Wagner

doi:10.24215/25456377e177

Autores

Gisele Portela 1Facultad de Ingeniería, CIFICEN Centro de investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires (CONICET ? CICPBA ? UNCPBA)
Alejandra Tironi Facultad de Ingeniería, CIFICEN Centro de investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires
Claudia Cecilia Wagner Facultad de Ingeniería, CIFICEN Centro de investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires

DOI:

https://doi.org/10.24215/25456377e177

Palavras-chave:

Illita, Montmorilonita, Caulinita, Calcinação, Adsorção, Metais pesados,

Resumo

As argilas têm sido amplamente utilizadas para remediação de águas residuais contaminadas com metais pesados. O objetivo deste trabalho é avaliar as alterações na adsorção de Cd(II) quando são utilizadas argilas naturais e calcinadas. Foram selecionadas quatro amostras de argilas procedentes de diferentes regiões da Argentina com médio teor de argilominerais: ilita (I), montmorilonita (M), caulinita com estrutura ordenada (CO) e caulinita com estrutura desordenada (CD). Estas foram caracterizadas por Difração de Raios X, Espectroscopia no Infravermelho com Transformada de Fourier e superfície específica BET. Foram realizados estudos de adsorção de Cd(II) com as mesmas na forma natural e calcinada, variando a concentração inicial do íon metálico. Verificou-se que a argila natural com médio teor de montmorilonita e a argila calcinada com médio teor de ilita (IC) apresentaram os maiores percentuais de adsorção (M 95%, IC 76%). Conclui-se que o tratamento térmico permite potencializar o uso de uma argila (I) da região de influência da Universidade Nacional do Centro da Província de Buenos Aires (UNCPBA).

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