Research on Chemical Intermediates

, Volume 39, Issue 8, pp 3791–3802 | Cite as

Synthesis of pyridin-3-yl-functionalized silica as a chelating sorbent for solid-phase adsorption of Hg(II), Pb(II), Zn(II), and Cd(II) from water



Silica gel modified with 3-aminopropyltrimethoxysilane was anchored with nicotinaldehyde to prepare a new chelating surface (or matrix). It was synthesized and characterized by elemental analysis, cross-polarization magic-angle spinning 13C nuclear magnetic resonance (NMR) spectroscopy, diffuse reflectance infrared Fourier-transform spectroscopy, nitrogen adsorption–desorption isotherm, Brunauer–Emmett–Teller surface area, and Barrett–Joyner–Halenda pore sizes. The new surface exhibits good chemical and thermal stability as determined by thermogravimetry curves. This new organic–inorganic material was used for preconcentration of Hg(II), Pb(II), Zn(II), and Cd(II) from water prior to their determination by inductively coupled plasma atomic emission spectrometry. The optimum pH for quantitative sorption of these metal ions is in the range of 6–8, and the sorption capacity is in range of 486–1,449 μmol/g. By batch method, 95 % extraction takes ≤30 min. All the metals could be desorbed with a solution of hydrochloric acid (6 N) without loss of the expensive ligand. Solutions of the metal ions were prepared by dissolution of the nitrate solution.


Modified surface Nicotinaldehyde Metal ions Adsorption 


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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  1. 1.Laboratoire de Chimie Organique, Macromoléculaire et Produits Naturels; Equipe de Chimie Bio-organique et Macromoléculaire; Unité Associée au CNRST (URAC 25), Département de ChimieFaculté des Sciences, Université Med IOujdaMorocco
  2. 2.Centre de l’Oriental des Sciences et Technologies de l’Eau (COSTE)Université Med IOujdaMorocco
  3. 3.UMET: Unité Matériaux et Transformations UMR8207, Equipe Ingénierie des Systèmes PolymèresUniversité des Sciences et Technologies de LilleVilleneuve d’AscqFrance

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