Effect of the addition mode of carbon nanotubes for the production of chitosan hydrogel core-shell beads on adsorption of Congo red from aqueous solution

被引：59
作者：
Chatterjee, Sudipta [1 ]
Chatterjee, Tania [1 ]
Lim, Seong-Rin [2 ]
Woo, Seung H. [1 ]
机构：
[1] Hanbat Natl Univ, Dept Chem Engn, Taejon 305719, South Korea
[2] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA
来源：
BIORESOURCE TECHNOLOGY | 2011年 / 102卷 / 06期
关键词：
Chitosan; Carbon nanotube; Sodium dodecyl sulfate; Surfactant; Adsorption; LOW-COST ADSORBENTS; ACTIVATED CARBON; DYE REMOVAL; WASTE-WATER; METAL-IONS; COIR PITH; BIOSORPTION; EFFLUENT;
D O I：
10.1016/j.biortech.2010.12.117
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The adsorption performance of chitosan (CS) hydrogel beads (CSBs) generated by sodium dodecyl sulfate (SOS) gelation with multi-walled carbon nanotube (CNT) impregnation was investigated for Congo red removal as a model anionic dye. CNT-impregnated CSBs were prepared by four different strategies for dispersing CNTs: (a) in CS solution (CSBN1), (b) in SOS solution (CSBN2), (c) in CS solution containing cetyltrimethylammonium bromide (CTAB) (CSBN3), and (d) in SDS solution for gelation with CTAB-containing CS solution (CSBN4). It was observed from FE-SEM study that depending on nature of CNT dispersion, CNTs were found on the outer surface of CSBN2 and CSBN4 only. The adsorption capacity of the CSBs varied with the strategy used for CNT impregnation, and CSBN4 exhibited the highest maximum adsorption capacity (375.94 mg/g) from the Sips model. The lowest Sips maximum adsorption capacity by CSBN3 (121.07 mg/g) suggested significant blocking of binding sites of CS by CNT impregnation. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4402 / 4409
页数：8
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