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Removal of Lead Ions from Wastewater Using Functionalized Multiwalled Carbon Nanotubes with Tris(2-Aminoethyl)Amine

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Author(s): Mohammad S. Tehrani | Parviz A. Azar | Parvin E. Namin | Shahram Moradi Dehaghi

Journal: Journal of Environmental Protection
ISSN 2152-2197

Volume: 04;
Issue: 06;
Start page: 529;
Date: 2013;
Original page

Keywords: Functionalized Multiwalled Carbon Nanotubes | Tris(2-Aminoethyl)Amine | Lead Adsorption | Isotherm Adsorption Models

ABSTRACT
Recently, many attempts have been made to use carbon nanotubes in analytical chemistry, especially in adsorption of heavy metal ions from water. In this study, multiwalled carbon nanotubes (MWCNTs) were functionalized with tris(2-aminoethyl) amine. The functionalized nanoparticles were characterized using Fourier transform infrared (FTIR), thermal gravimetric analyzer (TGA), elemental analysis, and Raman spectroscopy. The results revealed that the functionalization reaction was successfully accomplished. Lead adsorption from water was carried out using functionalized MWCNTs and measured by flame atomic absorption spectrometry (FAAS). The effects of pH, shaking time, initial metal ion concentration, and adsorbent dosage on the adsorption process were studied via batch method. The results obtained showed that removal of lead ions strongly depended on the pH. Desorption study revealed that lead ions adsorbed on the functionalized MWCNTs could be desorbed at pH
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