期刊
BIORESOURCE TECHNOLOGY
卷 101, 期 15, 页码 5820-5826出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.03.013
关键词
Graft copolymerization; Corn stalk; Cadmium removal; Aqueous solution
资金
- National Natural Science Foundation of China [40730741]
- Hi-Tech Research and Development Program of China [2007AA061001]
- Open Foundation of the State Key Laboratory of Pulp and Paper Engineering in South China University of Technology
- State Key Laboratory of Environmental Geochemistry in Institute of Geochemistry, Chinese Academy of Science
Corn stalk was modified using graft copolymerization to produce absorbent (AGCS), which was characterized by elemental analysis, fourier transform infrared, X-ray diffraction, solid-state CP/MAS C-13 NMR spectra, thermogravimetric analysis and differential scanning calorimeter. AGCS, having cyano group (-CN) after grafted successfully, exhibits more high adsorption potential for Cd(II) than unmodified forms. The efficiency of AGCS for removal of cadmium ions was evaluated. Factors affecting Cd(II) adsorption such as pH value and adsorbent dosage were investigated. More than 90% removal was achieved at pH 3.0-7.0 and the adsorption increased from 16.0% to 99.2% with increase of adsorbent dose. In addition, two isotherm models, namely. Langmuir and Freunlich were also analyzed to determine the best fit equation for adsorption of Cd(II) on AGCS. (C) 2010 Elsevier Ltd. All rights reserved.
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