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Metal ion uptake from aqueous solution by olive stones: A carbon-13 solid-state nuclear magnetic resonance and potentiometric study

The use of biomasses that result from the agriculture and food industries in removing heavy metals from wastewaters is attracting increasing interest. We present a joined potentiometric and cross polarization magic angle spinning (CP-MAS) carbon-13 (13C) nuclear magnetic resonance (NMR) study on the interaction of olive stones with copper(II), nickel(II), and cadmium(II). The potentiometric measurements allow both to distinguish two kind of basic sites in the olive stones and to postulate the coordination models for the three studied metals. The NMR spectral analysis allows the attribution of the different signals to the components of the olive stone matrix. A comparison of CP-MAS 13C NMR spectra of the samples after metal treatment suggests a specific complexation between metal ions and hydroxyl groups on guaiacyl and syringyl moieties.

© Water Environment Research, 2007, vol. 79, p. 2363-2367

Water Environment Federation

Author: Nurchi, Valeria Marina
Floris, Costantino
Pinna, Rosalba
Fiol Santaló, Núria
Villaescusa Gil, Isabel
Date: 2007
Abstract: The use of biomasses that result from the agriculture and food industries in removing heavy metals from wastewaters is attracting increasing interest. We present a joined potentiometric and cross polarization magic angle spinning (CP-MAS) carbon-13 (13C) nuclear magnetic resonance (NMR) study on the interaction of olive stones with copper(II), nickel(II), and cadmium(II). The potentiometric measurements allow both to distinguish two kind of basic sites in the olive stones and to postulate the coordination models for the three studied metals. The NMR spectral analysis allows the attribution of the different signals to the components of the olive stone matrix. A comparison of CP-MAS 13C NMR spectra of the samples after metal treatment suggests a specific complexation between metal ions and hydroxyl groups on guaiacyl and syringyl moieties.
Format: application/pdf
ISSN: 1061-4303 (versió paper)
1554-7531 (versió electrònica)
1061-4303
Document access: http://hdl.handle.net/10256/9437
Language: eng
Publisher: Water Environment Federation
Collection: Reproducció digital del document publicat a: http://dx.doi.org/10.2175/106143007X183880
Articles publicats (D-EQATA)
Is part of: © Water Environment Research, 2007, vol. 79, p. 2363-2367
Rights: Tots els drets reservats
Subject: Cadmi
Cadmium
Coure
Copper
Metalls pesants
Heavy metals
Níquel
Nickel
Potenciometria
Potentiometry
Title: Metal ion uptake from aqueous solution by olive stones: A carbon-13 solid-state nuclear magnetic resonance and potentiometric study
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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