Journal
CARBOHYDRATE POLYMERS
Volume 90, Issue 2, Pages 1100-1105Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2012.06.049
Keywords
Plasma grafting; CD/MWCNT/iron oxide composite; Zn(II); Magnetic separation; Reusability
Categories
Funding
- National Natural Science Foundation of China [20971126, 21077107]
- National Basic Research Program of China [2011CB933700]
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Herein, beta-cyclodextrin (beta-CD) was grafted onto magnetic MWCNT/iron oxide particles by using low temperature plasma-induced technique to synthesize a novel nanocomposite. The prepared composite (denoted as CD/MWCNT/iron oxide) exhibited high magnetic property (saturation magnetization M-s = 37.8 emu/g) and good dispersion property in aqueous solution. Batch experiments were conducted to evaluate the application potential of CD/MWCNT/iron oxide in the decontamination of Zn(II) from aqueous solutions. The sorption amount of Zn(II) on CD/MWCNT/iron oxide was higher than that of Zn(II) on MWCNT/iron oxides and oxidized MWCNTs, indicating that the grafted beta-CD could enhance the sorption capacity of CD/MWCNT/iron oxide composite toward Zn(II) by providing multiple hydroxyl functional groups. Due to its high magnetic, CD/MWCNT/iron oxide could be easily separated from aqueous solution with an external magnetic field. Regeneration studies suggested that CD/MWCNT/iron oxide can support long term use as a cost-effective material in sewage treatment with minimum replacement costs. (C) 2012 Elsevier Ltd. All rights reserved.
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