ADSORPTION MODELS FOR DESCRIBING THE EQUILIBRIUM IN THE NPAV - PLANT SORBENT SYSTEM

Shakirova Victoria Viktorovna  -  Candidate of Chemical Sciences, Associate Professor, Associate Professor, Astrakhan State University named by V.N. Tatishchev, Astrakhan, Russia, 414056, Tatishchev str., 20a, svv_2004@mail.ru

Sadomtseva Olga Sergeevna  -  Candidate of Chemical Sciences, Associate Professor, Associate Professor, Astrakhan State University named by V.N. Tatishchev, Astrakhan, Russia, 414056, Tatishchev str., 20a, sadomtseva.olga@yandex.ru

Kudryakova Liya Rinatovna  -  student, Astrakhan State University named by V.N. Tatishchev, Astrakhan, Russia, 414056, Tatishchev str., 20a, liya_kudryakova@mail.ru

The results of the study of the processes of adsorption of nonionic surfactants (on the example of OP-10) on a sorbent of plant origin, which is the products of tomato processing ? tomato cake, are presented. Langmuir, Freundlich and Temkin adsorption models were used to describe experimental adsorption isotherms. The parameters of the intensity and efficiency of the sorption process are calculated. A comparative analysis of the obtained constants corresponding to these models was carried out, and the most preferred model was determined taking into account the coefficient of determination. It is established that the Langmuir model is the most preferable for adsorption in the OP-10 ? plant sorbent system, which allows us to confidently assume that the surface of the natural materials under consideration contains a large number of active centers.

Key words: nonionic surfactants, sorption, sorbent, adsorption equilibrium, sorption models, thermodynamic parameters.