THE EVALUATION OF THE DRIED BEET PULP DETOXIC PROPERTIES BASED ON THE MODEL EXPERIMENTS
The study is devoted to the investigation of dried beet pulp detoxic properties in relation to positive low-molecular compounds, toxins and metabolites of protein nature with irregular structure on the basis of model experiments. Sorption activity of dried beet pulp, activated carbon and lignin-comprising preparation «Polifepan» in relation to methylene blue and gelatin was determined by spectrophotometric method. Then their comparative assessment was performed. It was shown that sorption activity in relation to methylene blue was increasing in a row: «Polifepan» (28.9±2.1 mg/g), beet pulp (66.1±1.1 mg/g), activated carbon (94.5±2,8 mg/g). Activated carbon and beet pulp demonstrate high affinity to methylene blue mainly due to developed specific surface and the micropores presence where sorption capacity is significantly higher than in mesopores and macropores. However, sorption activity of enterosorbents also depends on their ability to electrostatic and ion-exchange interaction with the adsorbate. It was established that adsorption activity in relation to gelatin is increasing in a row: activated carbon (2.1±0.5 mg/g), «Polifepan» (15.6±0.9 mg/g), beet pulp (27.9±1.2 mg/g). Minimum sorption capacity of gelatin on activated carbon is connected with surface hydrophobicity and the adsorbate molecule size which are too large to enter into the carbonic sorbate micropores so huge activated carbon specific surface is inaccessible for the protein. The growth of «Polifepan» sorption activity is probably connected with the presence of mesopores and macropores capable to sorb macromolecules better as well as with hydrophobic- hydrophilic surface of «Polifepan». Beet pulp demonstrates maximum sorption activity in relation to gelatin due to electrostatic interaction between positive gelatin fragments and anionic surface (carboxylic groups) of the adsorbate. The study of the sorbate extraction degree with regard to beet pulp mass showed that in small masses gelatin is sorbed better. However, when sorbate mass is 3g the extraction degrees are equal (95 %). Such polynomial dependence in the case of gelatin is related to the reduction of dissociated carboxylic groups number in beet pulp composition when its concentration is increased. It was demonstrated that dried beet pulp according to its detoxic properties in relation to low-molecular organic compounds and metabolites of protein nature is equal to the registered enterosorbents based on activated carbon and hydrolytic lignin.