Smectite clay sequestration of aflatoxin B1 : Particle size and morphology - Mulder, I. (Texas A and M University. Soil and Crop Sciences Department) ; Barrientos Velazquez, A. L. (Texas A and M University. Soil and Crop Sciences Department) ; Tenorio Arvide, M. G. (Texas A and M University. Soil and Crop Sciences Department) ; White, G. N. (Texas A and M University. Soil and Crop Sciences Department) ; Dixon, Joe B. (Texas A and M University. Soil and Crop Sciences Department)