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

作者：Hajiaghababaei Leila^*; Ghasemi Babak; Badiei Alireza; Goldooz Hassan; Ganjali Mohammad Reza; Ziarani Ghodsi Mohammadi

来源：Journal of Environmental Sciences, 2012, 24(7): 1347-1354.

DOI：10.1016/S1001-0742(11)60892-9

• aminobenzenesulfonamide functionalized SBA-15
• preconcentration
• Pb2+ and Cu(+2)ions

A rapid method for the extraction and monitoring of nanogram level of Pb2+ and Cu2+ ions using uniform silanized mesopor (SBA-15) functionalized with aminobenzenesulfonamide groups and flame atomic absorption spectrometry (FAAS) is presented. Aminobenzenesulfonarnide 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 m(2)/g and pore diameter 5.1 nm, based on adsorption-desorption of N-2 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 mu g 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/rnL for Pb2+ and Cu2+, respectively. The applications of this methodology for real samples were examined by various water type, black tea and pepper samples.

• 出版日期2012