Evaluación de la capacidad de adsorción de aflatoxinas totales sobre arcillas modificadas

Y. HUAYPAR , E. GABRIEL, A. GUTARRA, R. SUN, J. BRAVO, C. VOLZONE

13-16 de agosto de 2006, Maringá, Brasil

Congreso; 6º Encontro Brasileiro sobre Adsorçao; 2006

Departamento Departamento de Engenharia Química.

Studies have been carried out about the capacity for adsorption of aflatoxins (B1, B2, G1 and G2) in contaminated corn feed by three clays classified as smectites, which had been modified previously by acid activation treatment. The mineralogical characterization of the clays was realized by DRX, FTIR, and MS. These techniques were used also for monitoring structural changes in the minerals associated to the activation treatment. The evaluation of the adsortion of aflatoxins by the clays was performed by means of the ELISA method; for this purpose we used a dose of 0.1% w/w clay/corn naturally contaminated with 80 ppb of aflatoxins. The results show that in some cases the modified samples have a higher efficiency for adsorption than the natural untreated clays.