Effect of Ozonation of Lignocellulosic Materials on Sorption of Cationic Dye

Autor:	A. N. Kharlanov, N. A. Mamleeva, E.M. Benko
Rok vydání:	2021
Předmět:	Aqueous solution Sorbent Ion exchange Chemistry Inorganic chemistry technology industry and agriculture Langmuir adsorption model Sorption complex mixtures symbols.namesake chemistry.chemical_compound Adsorption Specific surface area symbols Lignin Physical and Theoretical Chemistry
Zdroj:	Russian Journal of Physical Chemistry A. 95:1698-1704
ISSN:	1531-863X 0036-0244
Popis:	Isotherms of the adsorption methylene blue (MB) from aqueous solutions by sulfate lignin, aspen wood, and wood samples pretreated with ozone are recorded and analyzed. The adsorption isotherms are described in terms of the Langmuir model. Adsorption capacity, specific surface area, and values of adsorption interaction constants are determined. It is found that ozone pretreatment of wood reduces the constant of dye bonding to a surface, while the sorption capacity remains almost unchanged. IR spectroscopy data show that ozonized lignocellulosic materials are characterized by high contents of carbonyl and carboxyl groups capable of electrostatic interaction and ion exchange, and low contents of aromatic structures. It is concluded that the presence of lignin in the plant sorbent contributes to an increase in the efficiency of dye sorption.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d221134c9bdd339721437aa04e3e117e https://doi.org/10.1134/s0036024421080069 Zobrazit plný text záznamu Full text from SpringerLink