Polydopamine Nanoparticles as a New and Highly Selective Biosorbent for the Removal of Copper (II) Ions from Aqueous Solutions

被引：105
|
作者：
Farnad, Neda [2 ,3 ]
Farhadi, Khalil [1 ]
Voelcker, Nicolas H. [4 ]
机构：
[1] Urmia Univ, Dept Chem, Fac Sci, Orumiyeh, Iran
[2] Urmia Univ, Dept Biol, Fac Sci, Orumiyeh, Iran
[3] Payamnour Univ Urmia, Orumiyeh, Iran
[4] Univ S Australia, Mawson Inst, Adelaide, SA 5001, Australia
来源：
WATER AIR AND SOIL POLLUTION | 2012年 / 223卷 / 06期
关键词：
Adsorption; Copper; Biopolymer; Polydopamine; Nanoparticles; HEAVY-METALS; ACTIVATED CARBON; HAZELNUT SHELL; WASTE-WATER; ADSORPTION; BIOSORPTION; BIOMASS; EQUILIBRIUM; SORPTION; PB(II);
D O I：
10.1007/s11270-012-1131-7
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The adsorption and desorption of copper (II) ions from aqueous solutions were investigated using polydopamine (PD) nanoparticles. The nanoscale PD nanoparticles with mean diameter of 75 nm as adsorbent were synthesized from alkaline solution of dopamine and confirmed using scanning electron microscopy and X-ray diffraction analysis. The effects of pH (2-6), adsorbent dosage (0.2-0.8 g L-1), temperature (298-323 K), initial concentration (20-100 mg L-1), foreign ions (Zn2+, Ni2+, Cd2+, Fe2+, and Ag+), and contact time (0-360 min) on adsorption of copper ions were investigated through batch experiments. The isotherm adsorption data were well described by the Langmuir isotherm model. The maximum uptake capacity of Cu2+ ions onto PD nanoparticles was found to 34.4 mg/g. The kinetic data were fitted well to pseudo-second-order model. Moreover, the thermodynamic parameters of the adsorption (the Gibbs free energy, entropy, and enthalpy) were studied.
引用
收藏
页码：3535 / 3544
页数：10
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