Removal of heavy metals from aqueous solution by carbon nanotubes: adsorption equilibrium and kinetics

被引：0
作者：
Li, YH
Di, ZC
Luan, ZK [1 ]
Ding, J
Zuo, H
Wu, XQ
Xu, CL
Wu, DH
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China
[2] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES | 2004年 / 16卷 / 02期
关键词：
carbon nanotubes; heavy metals; adsorption;
D O I：
暂无
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Carbon nanotubes prepared by catalytic chemical vapor deposition of hydrocarbon at 650degreesC show good adsorption capability of Pb2+, Cu2+ and Cd2+ ions from aqueous solution after oxidized with concentrated nitric acid at 140 degreesC for 1 h. The specific surface area and particle size distribution of the as-grown and oxidized CNTs were studied by BET method and laser particle analyzer. Three kinetic models, that is, first-, pseudo second- and second-order, were used to investigate the adsorption data and the pseudo second-order model can represent the experimental data better than two others. The equilibrium data fitted well with the Langmuir model and showed the following adsorption order: Pb2+ > Cu2+ > Cd2+.
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页码：208 / 211
页数：4
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