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Open AccessArticle

Organically Modified Silica with Pyrazole-3-carbaldehyde as a New Sorbent for Solid-Liquid Extraction of Heavy Metals

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Laboratoire de Chimie Appliquée et Environnement (LCAE), Faculté des Sciences, Université Mohamed I, Oujda 60 000, Morocco
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Centre de l'Oriental des Sciences et Technologies de l'Eau (COSTE), Université Med I, Oujda 60 000, Morocco
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Unité Matériaux et Transformations UMR8207 (UMET), Equipe Ingénierie des Systèmes Polymères, Université des Sciences et Technologies de Lille, Bâtiment C6 salle 119-59655 Villeneuve d'Ascq, France
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Université Lille Nord de France, F-59000 Lille, Unité de Chimie Environnementale et Interactions sur le Vivant, 145 Avenue M. Schuman F-59140 Dunkerque, France
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Laboratoire GREMAN CNRS-UMR 7347 IUT de BLOIS, Université François-Rabelais de Tours, 15 rue de la Chocolatrie 41029 Blois, France
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Department of Chemistry, Faculty of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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Author to whom correspondence should be addressed.
Molecules 2014, 19(1), 247-262; https://doi.org/10.3390/molecules19010247
Received: 3 December 2013 / Revised: 17 December 2013 / Accepted: 19 December 2013 / Published: 24 December 2013
(This article belongs to the Section Molecular Diversity)
A new chelating matrix, SiNP, has been prepared by immobilizing 1.5-dimethyl-1H-pyrazole-3-carbaldehyde on silica gel modified with 3-aminopropyl-trimethoxysilane. This new chelating material was well characterized by elemental analysis, FT-IR spectroscopy, cross polarization magic angle spinning solid state 13C-NMR, nitrogen adsorption-desorption isotherm, BET surface area, BJH pore size, and scanning electron microscopy (SEM). The new product exhibits good chemical and thermal stability as determined by thermogravimetry curves (TGA). The new prepared material was used as an adsorbent for the solid-phase extraction (SPE) of Pb(II), Cd(II), Cu(II) and Zn(II) from aqueous solutions using a batch method, prior to their determination by flame atomic adsorption spectrometry. The adsorption capacity was investigated using kinetics and pH effects. Common coexisting ions did not interfere with separation and determination. View Full-Text
Keywords: chemically modified SiO2; synthesis; characterization; adsorption; Pb(II); Cd(II); Cu(II); Zn(II) chemically modified SiO2; synthesis; characterization; adsorption; Pb(II); Cd(II); Cu(II); Zn(II)
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Radi, S.; Tighadouini, S.; Bacquet, M.; Degoutin, S.; Cazier, F.; Zaghrioui, M.; Mabkhot, Y.N. Organically Modified Silica with Pyrazole-3-carbaldehyde as a New Sorbent for Solid-Liquid Extraction of Heavy Metals. Molecules 2014, 19, 247-262.

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