| Autor: |
Aleeva, C. V., Lepilova, O. V., Koksharov, S. A. |
| Předmět: |
|
| Zdroj: |
Protection of Metals & Physical Chemistry of Surfaces; Feb2022, Vol. 58 Issue 1, p13-21, 9p |
| Abstrakt: |
To obtain effective mesoporous sorbents for air purification, flax shive was modified by biocatalyzed cleavage of hemicelluloses and pectin substances using fermentation products for redox transformations of lignin. The changes in the polymer composition and parameters of the pore structure of flax shive were estimated by the methods of sequential extraction of polysaccharides and low-temperature adsorption of nitrogen. The change in the state of lignin upon the binding of o- and p-cresols was traced by the method of Fourier IR spectroscopy. For samples of native and modified flax shive and lignin preparations isolated from them, the kinetics of adsorption of cresol vapors was analyzed in the temperature range of 298–313 K. An adequate description of the sorption process was obtained by using a kinetic model of pseudosecond order to determine the level of limiting sorption of cresols on glycans and lignin. The thermodynamic parameters of sorption were calculated from specific sorbate retention volume data. Modeling results made it possible to differentiate the contribution of polymeric components of the flax substrate and to estimate the ability of functional groups of lignin of the biomodified flax shive to sorption binding of cresol in ortho- and para-isomeric forms. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink