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Aqueous heavy metals removal on amine-functionalized Si-MCM-41 and Si-MCM-48.

Abstract : Ordered mesoporous silica with hexagonal and cubic structure, type MCM-41 and MCM-48 respectively, were synthesized under basic media using pure silica, cetyltrimethylammonium bromide and tetramethylammonium hydroxide, for MCM-41 and tetraethylorthosilica, cetyltrimethylammonium and NaOH for MCM-48. The expanded materials were prepared by post-synthesis method with N-N dimethyldodecylamine (DMDDA) and dodecylamine (DDA). Small angle X-ray diffraction, nitrogen adsorption-desorption measurements, FT-IR and thermogravimetry were used to characterize the samples. The expanded materials were tested for adsorption of Cd(2+), Co(2+), Cu(2+) and Pb(2+) in aqueous solution. Aminated materials were found to be fast adsorbents for metallic ions cation with affinity for Cu(2+), Pb(2+), than for Cd(2+) and Co(2+) from single solution. In mixed metallic ions cation solutions, competition by the adsorption sites is likely to occur, the adsorption preference is for Cu(2+)and Pb(2+). The kinetic of the reaction is very rapid and follow pseudo-second order and clearly indicated that Langmuir model describe better the for metal ions adsorption on aminated mesoporous material than Freundlich model.
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https://hal-unilim.archives-ouvertes.fr/hal-00653594
Contributeur : Françoise Merigaud <>
Soumis le : lundi 19 décembre 2011 - 17:38:59
Dernière modification le : lundi 24 septembre 2018 - 09:42:14

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A. Benhamou, Michel Baudu, Z. Derriche, Jean-Philippe Basly. Aqueous heavy metals removal on amine-functionalized Si-MCM-41 and Si-MCM-48.. J Hazard Mater, 2009, 171 (1-3), pp.1001-8. ⟨10.1016/j.jhazmat.2009.06.106⟩. ⟨hal-00653594⟩

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