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Abstract: This paper reports the synthesis, characterization and mercury adsorption behaviour of new organic-inorganic hybrid nanostructured silicas obtained by co-condensation, molecular imprinting and post-synthesis routes. N2 adsorption-desorption measurements, XRD, FT-IR, MAS NMR, SEM, TEM and elemental analysis were used to characterize the physico-chemical properties of the hybrid nanostructured materials. The materials were studied for Hg(II) adsorption in aqueous medium at pH 3 and compared with unmodified nanostructured silica. Mercury adsorption was higher in the hybrid material prepared by the co-condensation method that reached a mercury uptake of 134 mg Hg/g. The best mercury adsorption efficiency was observed for the hybrid material prepared by molecular imprinting route. The synthetic route employed clearly affects the textural properties of the silica, the amount of organic ligand attached onto the support and mercury adsorption behaviour
Template and target information: mercury ion, Hg(II)
Author keywords: hybrid materials, Heavy metal adsorption, Co-condensation, Molecular impression, Post-synthesis