期刊
RSC ADVANCES
卷 7, 期 54, 页码 34182-34191出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra03056h
关键词
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资金
- Guangxi Youth Natural Science Fund [GXNSFBA053025]
- National High Technology Research and Development Program (863 Program) of China [2009AA06A416]
- National Natural Science Foundation of China [51108261]
- Guangxi Science and Technology Research Program [14251009]
- Natural Science Foundation of Guangxi [2013GXNSFFA019005]
A new biosorbent (PEI/SA-MCCMV) with abundant amino and carboxyl groups was prepared by grafting polyethylenimine (PEI) onto carboxylated microcrystalline cellulose (SA-MCCMV), which was obtained through grafting succinic anhydride (SA) on pretreated microcrystalline cellulose (MCCMV) with microwave-H2O2. It was confirmed by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), X-ray photoelectron microscopy (XPS) and thermogravimetric (TG) that the amino and carboxyl groups were introduced onto the microcrystalline cellulose, and the amino and carboxyl groups content were 2.61 mmol g(-1) and 4.64 mmol g(-1), respectively. The effects of the contact time and pH on heavy metal ion uptake were investigated. The adsorption kinetic data was described well with the pseudo-second-order model (R-2 > 0.99) and the adsorption isotherms were well fitted by the Freundlich isotherm model, demonstrating that chemisorption was the rate-controlling factor for heavy metal ion adsorption on the PEI/SA-MCCMV biosorbent. Furthermore, the remarkable adsorption capacity (217.3 and 357.1 mg g(-1) for Cd(II) and Pb(II), respectively) obtained from the Langmuir isotherm indicated that this biomass adsorbent has a promising application in water treatment.
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