Adsorption of Au(Ⅲ) and Pd(Ⅱ) in Solution of 2,2'-Diaminodiethylamine Modified Multiwalled Carbon Nanotubes

doi:10.3969/j.issn.0251-0790.2012.03.029

Abstract

Abstract:

2,2'-Diaminodiethylamine(DETA) covalently modified multi-walled carbon nanotubes(MWCNTs-DETA) were synthesized and used for the adsorption of Au(Ⅲ) and Pd(Ⅱ). The experimental parameters affecting the adsorption capacities were studied and optimized. The highest elution ratios were determined as 94.48% for Au(Ⅲ) and 89.06% for Pd(Ⅱ) using 1.0 mol/L thiourea-hydrochloric acid solution as the eluent. Under the optimal experimental conditions, the maximum adsorption capacities for Au(Ⅲ) and Pd(Ⅱ) were 50.45 and 25.68 mg/g, respectively. Langmuir isotherm model agreed well with the equili-brium experimental data of Au(Ⅲ) while Freundlich isotherm model agreed with those of Pd(Ⅱ). Adsorption kinetics of Au(Ⅲ) and Pd(Ⅱ) could be well described by the pseudo-second-order model.

Key words: Multiwalled carbon nanotube(MWCNTs), 2,2’-Diaminodiethylamine(DETA), Modification, Adsorption, Precious metal ion

CLC Number:

O647.3

TrendMD:

LI Cui, XU Xin, BAO Chang-Li, WANG Huan-Feng, LIU Li, LIU Xiao-Ting. Adsorption of Au(Ⅲ) and Pd(Ⅱ) in Solution of 2,2'-Diaminodiethylamine Modified Multiwalled Carbon Nanotubes[J]. Chem. J. Chinese Universities, 2012, 33(03): 586.

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