Removal of lead(II) from aqueous solution by adsorption onto manganese oxide-coated carbon nanotubes

被引：291

作者：

Wang, Shu-Guang ^{[1
]}

Gong, Wen-Xin ^{[1
]}

Liu, Xian-Wei ^{[1
]}

Yao, Ya-Wei ^{[1
]}

Gao, Bao-Yu ^{[1
]}

Yue, Qin-Yan ^{[1
]}

机构：

[1] Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2007年 / 58卷 / 01期

关键词：

carbon nanotubes; manganese oxide coated; Pb(II); adsorption;

D O I：

10.1016/j.seppur.2007.07.006

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Mn oxide-coated carbon nanotubes (MnO2/CNTs) were prepared and used to remove Pb(II) from aqueous solution. The XRD revealed that MnO2 covered MnO2/CNTs was an amorphous phase. The Pb(II) removal capacity of MnO2/CNTs decreased with the decrease of pH. From the Langmuir isotherms, maximum adsorption capacity (Q(0)) of MnO2/CNTs towards Pb(II) was determined (Q(0) = 78.74 mg/g). Comparing with CNTs, significant improvement of Pb(Il) adsorption shows MnO2/CNTs can be good Pb(11) absorbers. Although Pb(II) adsorption by MnO2/CNTs occurred rapidly within the first 15 min of contact time, contact time needed at least 2 It in order to attain adsorption equilibrium and the kinetic adsorption can be described by the pseudo-second-order rate equation. Thermodynamics of Pb(H) was studied at various temperatures of 283, 303 and 323 K and the thermodynamic parameters were also determined. (c) 2007 Published by Elsevier B.V.

引用

页码：17 / 23

页数：7

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