Sorption of vanillin on highly basic anion exchanger under static conditions
- Autores: Sholokhova A.1, Eliseeva T.1, Voronyuk I.1
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Afiliações:
- Faculty of Chemistry
- Edição: Volume 91, Nº 11 (2017)
- Páginas: 2237-2243
- Seção: Physical Chemistry of Surface Phenomena
- URL: https://journals.rcsi.science/0036-0244/article/view/169777
- DOI: https://doi.org/10.1134/S0036024417110255
- ID: 169777
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Resumo
The kinetics of the sorption of vanillin by a granulated anion exchanger is studied under static conditions. A comparison of the kinetic curves of the uptake of hydroxybenzaldehyde by gel and macroporous anion exchanger shows that macroporous sorbent has better kinetic characteristics. The effect temperature has on the capacity of an anion exchanger and the time needed to establish sorption equilibrium is found, and the activation energy of vanillin uptake is determined. Studying the effect experimental factors have on the rate of sorption and using the formal kinetics approach, it is established that in the investigated range of concentrations, the limiting stage of the uptake of vanillin by an anion exchanger with the functional groups of a quaternary ammonium base is that of external diffusion. Vanillin sorption by a highly basic anion exchanger in hydroxyl form is characterized by polymolecular uptake best described by a BET isotherm; at the same time, the uptake of sorbate by a chloride form is of a monomolecular character and can be described by a Freindlich isotherm. Structural changes in the anion exchanger sorbed hydroxybenzaldehyde are identified via FTIR spectroscopy.
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Sobre autores
A. Sholokhova
Faculty of Chemistry
Email: tatyanaeliseeva@yandex.ru
Rússia, Voronezh, 394018
T. Eliseeva
Faculty of Chemistry
Autor responsável pela correspondência
Email: tatyanaeliseeva@yandex.ru
Rússia, Voronezh, 394018
I. Voronyuk
Faculty of Chemistry
Email: tatyanaeliseeva@yandex.ru
Rússia, Voronezh, 394018