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Molecules 2014, 19(1), 247-262; doi:10.3390/molecules19010247
Article

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

1,2,* , 1, 3, 3, 4, 5 and 6
Received: 3 December 2013; in revised form: 17 December 2013 / Accepted: 19 December 2013 / Published: 24 December 2013
(This article belongs to the Section Organic Synthesis)
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Abstract: 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.
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)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

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.

AMA Style

Radi S, Tighadouini S, Bacquet M, Degoutin S, Cazier F, Zaghrioui M, Mabkhot YN. Organically Modified Silica with Pyrazole-3-carbaldehyde as a New Sorbent for Solid-Liquid Extraction of Heavy Metals. Molecules. 2014; 19(1):247-262.

Chicago/Turabian Style

Radi, Smaail; Tighadouini, Said; Bacquet, Maryse; Degoutin, Stéphanie; Cazier, Francine; Zaghrioui, Mustapha; Mabkhot, Yahia N. 2014. "Organically Modified Silica with Pyrazole-3-carbaldehyde as a New Sorbent for Solid-Liquid Extraction of Heavy Metals." Molecules 19, no. 1: 247-262.


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