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D-Glucosamine Sorption on Cu(II)-Montmorillonite as the Protonated and Neutral Species

Published online by Cambridge University Press:  02 April 2024

A. Pusino ,
G. Micera ,
A. Premoli  and
C. Gessa
A. Pusino
Affiliation:
Istituto di Chimica Agraria, Università di Sassari, Via E. de Nicola 10, 07100 Sassari, Italy
G. Micera
Affiliation:
Dipartimento di Chimica, Università di Sassari, Via Vienna 2, 07100 Sassari, Italy
A. Premoli
Affiliation:
Istituto di Chimica Agraria, Università di Sassari, Via E. de Nicola 10, 07100 Sassari, Italy
C. Gessa
Affiliation:
Istituto di Chimica Agraria, Università di Sassari, Via E. de Nicola 10, 07100 Sassari, Italy
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Abstract

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The adsorption of D-glucosamine (2-amino-2-deoxy-D-gIucose) in the protonated or neutral form on homoionic Cu2+-bentonite was investigated by infrared (IR) and electron spin resonance (ESR) spectroscopy and chemical analyses of solution. The results show that the interaction of the glucosamine hydrochloride with the clay complexed a small fraction of interlayer metal ions with neutral amino sugar molecules. In contrast, the adsorption of free glucosamine was much more favorable and resulted in interlayer copper(II) complexes, mainly those in which the ligand was coordinated through amino and deprotonated hydroxyl groups. Part of the amino sugar molecules, however, were transformed into glucosammonium, replacing copper as the saturating ion.

Keywords

AdsorptionCopperD-glucosamineElectron spin resonanceInfrared spectroscopyMontmorilloniteProtonation
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 4 , August 1989 , pp. 377 - 380
Copyright
Copyright © 1989, The Clay Minerals Society

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