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

作者：Li Cui; Xu Xin; Bao Chang Li^*; Wang Huan Feng; Liu Li; Liu Xiao Ting

来源：Chemical Journal of Chinese Universities, 2012, 33(3): 586-590.

DOI：10.3969/j.issn.0251-0790.2012.03.029

• Multiwalled carbon nanotube (MWCNTs)
• 2,2 '-Diaminodiethylamine (DETA)
• Modification
• Adsorption
• Precious metal ion

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 equilibrium 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.

• 出版日期2012-3-10
• 单位吉林大学