抄録
The objective of this research is to evaluate the ability of clay minerals to adsorb aflatoxin B1 (AFB1) in vitro. Fourteen clay minerals from different sources in Thailand and commercial adsorbents including bentonites and toxin binders were tested for AFB1 adsorption capacities. Our results indicated that the clay minerals were capable of sequestering AFB1 from aqueous solution differently. The experimental data were fitted to modified Freundlich model better than Langmuir model to investigate adsorption capacities and affinity constant. The S-shaped isotherms were observed for these clay minerals and commercial adsorbents. The clay minerals had maximum capacity (Qmax) ranged from 7.10 × 10-4 mol/kg to 4.76 × 10-3 mol/kg whereas the commercial adsorbents had Qmax ranged from 8.21 × 10-4 mol/kg to 4.52 × 10-3 mol/kg. The distribution constant (Kd) for the clay mineral samples and commercial adsorbents were in the ranges of 2.15 × 105-6.70 × 107 and 2.52 × 105-4.71 × 105, respectively. This in vitro method may be useful for accurately predicting the efficacy of adsorbents before testing in vivo.
