Sulfonated multi-walled carbon nanotubes for the removal of copper (II) from aqueous solutions

被引：49
|
作者：
Ge, Yuanyuan [1 ,2 ]
Li, Zhili [1 ,2 ]
Xiao, Duo [1 ]
Xiong, Piao [1 ]
Ye, Na [1 ]
机构：
[1] Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China
[2] Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China
来源：
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2014年 / 20卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Heavy metal ion; Adsorption; Carbon nanotube; Sulfonation; Wastewater; HEAVY-METAL IONS; ADSORPTION; EQUILIBRIUM; WATER; FUNCTIONALIZATION; CU2+; PB2+; THERMODYNAMICS;
D O I：
10.1016/j.jiec.2013.08.030
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Sulfonated multi-walled carbon nanotubes (s-MWCNTs) was prepared from purified multi-walled carbon nanotubes (p-MWCNTs) by concentrated H2SO4 at elevated temperature. The structure was characterized by SEM, FTIR, Raman, XPS, and BET. It could be dispersed steadily in water at a dosage of 1.0 mg/mL for a week. The adsorption performance of s-MWCNTs toward Cu(II) was investigated including the effects of pH and ionic strength. Results indicated the adsorption was much dependent on pH but not on ionic strength. The adsorption capacity for Cu(II) was enhanced 58.9% via the sulfonation. Moreover, the adsorption mechanisms were carefully analyzed by Freundlich and D-R models. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：1765 / 1771
页数：7
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