Study on efficacy of natural Thai clays for adsorption of aflatoxin B1

Abstract

Natural Thai clays from different areas and commercial adsorbents were investigated in relation to their adsorption capacities of aflatoxin B1 (AFB 1) in vitro. The Thai clays were capable of sequestering AFB 1 from aqueous solution differently. The experimental data were fitted to modified Freundlich model for investigating adsorption capacities and affinity constant. The S-shaped isotherms studies to measure capacity and affinity of toxin adsorption were observed for these clays as well as the commercial adsorbents. Results of X-ray diffraction spectrometry demonstrated that several Thai clays contained mainly montmorillonite. These results may be useful for predicting the efficacy of adsorbents in vivo prior to include in animal feeds.