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Metal Ion Uptake from Aqueous Solution by Olive Stones: A Carbon‐13 Solid‐State Nuclear Magnetic Resonance and Potentiometric Study
Author(s) -
Nurchi Valeria Marina,
Floris Costantino,
Pinna Rosalba,
Fiol Núria,
Villaescusa Isabel
Publication year - 2007
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143007x183880
Subject(s) - potentiometric titration , chemistry , magic angle spinning , metal ions in aqueous solution , aqueous solution , metal , copper , solid state nuclear magnetic resonance , inorganic chemistry , carbon 13 nmr , cadmium , nuclear magnetic resonance spectroscopy , analytical chemistry (journal) , ion , nuclear magnetic resonance , organic chemistry , physics
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 ( 13 C) 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 13 C NMR spectra of the samples after metal treatment suggests a specific complexation between metal ions and hydroxyl groups on guaiacyl and syringyl moieties.