Siberian Federal University

The paper presents the results of a study of Pepper’s dioxanlignins isolated from the stems (xylem) of various species of annual and perennial plants: cabbage Brássica olerácea, walnut tree Juglans regia, Jerusalem artichoke Helianthus tuberosus, quinoa spreading Atriplex patula, oak Quercus robur. Using the methods of spectral and chemical analysis, the elemental and functional composition of lignin samples was established. As a result of the research, the differences in the chemical structure of these biopolymers were revealed, including the number of acidic (phenolic and carboxyl) groups, as well as the content of guaiacil, syringyl and p-coumaric structural elements. The results of the study of the surface-porous structure of lignins by the method of low-temperature adsorption of nitrogen are presented. The adsorption capacity of the studied drugs for one of the most dangerous mycotoxins, aflatoxin B 1, was assessed. The experiments were carried out in aquatic environments that mimic conditions in the gastrointestinal tract of mammals. The relationship between the parameters of the surface-porous structure, chemical structure and adsorption-desorption indicators has been established. The obtained results indicate that the most important role for the implementation of strong adsorption of aflatoxin B 1 belongs to the mechanism of chemisorption, due to the presence of acidic functional groups of lignins