Journal
CHEMICAL ENGINEERING RESEARCH & DESIGN
Volume 133, Issue -, Pages 235-242Publisher
INST CHEMICAL ENGINEERS
DOI: 10.1016/j.cherd.2018.03.026
Keywords
Nanocomposites; Carbon nanotubes; Sorbents; Contaminant removal; Adsorption
Categories
Funding
- National Key Research and Development Program of China [2016YFC0502602]
- National Natural Science Foundation of China [U1612441]
- International Scientific and Technological Cooperation Project of Guizhou Province [G[2012]7050]
- Chinese Academy of Sciences [[2012]179]
- State Key Laboratory of Environmental Geochemistry [2018907]
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In this work, novel environmentally benign nanocomposites, carboxyl functionalized multiwall carbon nanotubes (MWCNT-COOH) impregnated into calcium-alginate (CA) beads (CA-MWCNT-COOH), were tested for their abilities to remove a common dye contaminant, methylene blue (MB), from aqueous solution. Kinetic studies showed that the adsorption process of CA-MWCNT-COOH had similar speed to that of CA beads but was slower than that of undispersed MWCNT-COOH. With a Langmuir maximum MB adsorption capacity of 1189 mg g(-1), the CA-MWCNT-COOH performed best, outperforming both CA beads alone (1144.7 mg g(-1)) and the undispersed MWCNT-COON (33.4 mg g(-1)). Furthermore, the impregnation also dramatically enhanced the adsorption of MB onto other types of MWCNTs, indicating CA beads are an excellent supporting material to disperse and stabilize carbon nanotubes for their optimal application as a high-capacity adsorbent. (C) 2018 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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