期刊
AICHE JOURNAL
卷 55, 期 8, 页码 2062-2069出版社
WILEY
DOI: 10.1002/aic.11797
关键词
ionic liquid; chitosan; cellulose; biosorption; heavy metals
资金
- Chinese Academy of Sciences, National Natural Science Foundation of China [50574080]
- National Key Technology R&D Program of China [2006BAC02A10]
- Distinguished Young Scholar Foundation [20060114]
Chitosan(chitin)/cellulose composites as biodegradable biosorbents were prepared under an environment-friendly preparation processes using ionic liquids. Infrared and X-ray photoelectron spectra indicated the stronger intermolecular hydrogen bond between chitosan and cellulose, and the hydroxyl and amine groups were believed to be the metal ion binding sites. Among the prepared biosorbents, freeze-dried composite had higher adsorption capacity and better stability. The capacity of adsorption was found to be Cu(II) (0.417 mmol/g) > Zn(II) (0.303 mmol/g) > Cr(VI) (0.251 mmol/g) > Ni(II) (0.225 mmol/g) > Ph(II) (0.127 mmol/g) at the same initial concentration 5 mmol L-1. In contrast to some other chitosan-type biosorbents, preparation and component of the biosorbent were obviously more environment friendly. Moreover, adsorption capacity of chitosan in the blending biosorbent could be fully shown. (C) 2009 American Institute of Chemical Engineers AIChE J, 55: 2062-2069, 2009
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