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aminobenzenesulfonamide functionalized sba-15 nanoporous molecular sieve: A new and promising adsorbent for preconcentration of lead and copper ions

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Journal of Environmental Sciences 2012年第7期24卷 1347-1354页

作者： Leila Hajiaghababaei Babak Ghasemi Alireza Badiei Hassan Goldooz Mohammad Reza Ganjali Ghodsi Mohammadi Ziarani Department of Chemistry Islamic Azad UniversityShahre Rey Branch School of Chemistry College of ScienceUniversity of Tehran Center of Excellence in Electrochemistry Faculty of ChemistryUniversity of Tehran Department of Chemistry Alzahra University

A rapid method for the extraction and monitoring of nanogram level of Pbz＋ and Cuz＋ ions using uniform silanized mesopor （sba-15） functionalized with aminobenzenesulfonamide groups and flame atomic absorption spectrometry （FAAS） is presented. aminobenzenesulfonamide functionalized sba-15 was synthesized according to procedure in the literature and the presence of organic groups in the silica framework was demonstrated by FT-IR spectra. The functionalized product showed the BET surface area 110 mZ/g and pore diameter 5. l nm, based on adsorption-desorption of N2 at 77 K. The effect of several variables such as （amount of adsorbent, stirring time, pH and presence of other ions in the medium） has been studied. Lead and copper were completely extracted at pH greater than 3 after stirring for 10 min. The maximum capacity of the adsorbent was found to be 191.3 ＋ 1.4 and 155.0 ＋ 1.0 ~xg of lead and copper ions/mg functionalized sba-15, respectively. The preconcentration factor of the method was found to be 200. The detection limit of the technique was 3.4 and 0.4 ng/mL for Pb2＋ and Cuz＋, respectively. The applications of this methodology for real samples were examined by various water type, black tea and pepper samples.

关键词： aminobenzenesulfonamide functionalized sba-15 preconcentration Pb2+ and Cu2+ions

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