Simple synthesis and chelation capacity of N-(2-sulfoethyl)chitosan, a taurine derivative / Petrova Yulia S.,Neudachina Ludmila K.,Mekhaev Alexandr V.,Pestov Alexandr V. // CARBOHYDRATE POLYMERS. - 2014. - V. 112, l. . - P. 462-468.

ISSN/EISSN:

0144-8617 / 1879-1344

Type:

Article

Abstract:

This study presents a simple and effective synthesis method of N-(2-sulfoethyl)chitosan (NSE-chitosan) via a reaction between sodium 2-bromoethanesulfonate and chitosan that allows polymer transformation without using additional reagents and organic solvents. The chemical structure of the obtained NSE-chitosan was characterized by FT-IR and H-1 NMR spectroscopies. Thermogravimetric study of NSE-chitosan coupled with FT-IR analysis has shown stability of the polymer up to 200 degrees C, which almost does not change with the increase of degree of substitution (DS). The sorption of transition and alkaline earth metal ions from multicomponent solutions on NSE-chitosan was investigated. The synthesized sorbents showed the selective recovery of silver(I) and copper(II) ions from ammonium acetate buffer solution. The increase of DS enhanced the selectivity to silver(I) ions sorption in comparison with copper(II) ions. Selectivity coefficients K-Ag/Cu increase from 1.3 to 10.9 with DS increasing up to 0.7 (ammonium acetate buffer solution, pH 6.5). Sorption isotherms of transition metal ions on NSE-chitosan with DS=0.5 have been fitted using Langmuir, Freundlich, and Redlich-Peterson models. The maximum sorption capacities of sorbent in ammonium acetate buffer solution at pH 6.0 were 1.72 mmol/g for Cu(II), 1.23 mmol/g for Ag(I) and below 0.5 mmol/g for Co(II), Zn(II), Cd(II), Pb(II), Mn(II) and Ni(II) ions. (C) 2014 Elsevier Ltd. All rights reserved.

Author keywords:

Chitosan; Sulfoderivatives; Thermal properties; Sorption; Selectivity CROSS-LINKED CHITOSAN; CHEMICALLY-MODIFIED CHITOSAN; METAL-IONS; ADSORPTION PROPERTIES; SELECTIVE ADSORPTION; SORPTION PROPERTIES; COPPER(II) IONS; CHITIN; GEL; WATER

DOI:

10.1016/j.carbpol.2014.06.028

Web of Science ID:

ISI:000341464600061

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV 4
Publisher	ELSEVIER SCI LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Language	English
EISSN	1879-1344
Keywords-Plus	CROSS-LINKED CHITOSAN; CHEMICALLY-MODIFIED CHITOSAN; METAL-IONS; ADSORPTION PROPERTIES; SELECTIVE ADSORPTION; SORPTION PROPERTIES; COPPER(II) IONS; CHITIN; GEL; WATER
Research-Areas	Chemistry; Polymer Science
Web-of-Science-Categories	Chemistry, Applied; Chemistry, Organic; Polymer Science
Author-Email	pestov@ios.uran.ru
Funding-Acknowledgement	UrFU; Russian Federation {[}MK-5745.2013.3]
Funding-Text	This research project has been supported by UrFU under the Framework Programme of development of UrFU through the ``Young scientists UrFU{''} competition, and grant of the President of the Russian Federation MK-5745.2013.3.
Number-of-Cited-References	60
Usage-Count-Last-180-days	6
Usage-Count-Since-2013	54
Journal-ISO	Carbohydr. Polym.
Doc-Delivery-Number	AO6LW