Kinetic peculiarities of Quillaja Saponaria Molina saponin sorption by chitosan

Abstract

A relationship between adsorption layer structure at different stages of sorbent filling, hydrophilicity, and spatial orientation of saponin in chitosan phase is revealed by joint analysis of the kinetic curves of saponin sorption, IR spectra of chitosan and saponin samples, and computer-simulation data. The sorbent–sorbate complex is formed due to electrostatic interactions between protonated amino groups in chitosan and carboanions of glucuronic acid in saponin, as well as hydrogen bonding between NH₂ and OH groups in chitosan molecules and OH groups in the carbohydrate moiety of saponin molecules.