Kinetics of Water Sorption by Soybean and Pigeonpea Grains

Abstract

ABSTRACT Kinetics of liquid water sorption by soybean ( Glycine max ) and pigeonpea ( Cajanus cajan ) seeds was studied at several temperatures. The data could be accurately correlated in terms of an empirical model involving a single rate constant. The temperature dependence of the rate constant followed Arrhenius relation. Swelling of grains due to water sorption was slightly less than the volume of water imbibed. This loss related to the energy of activation of the water sorption process.