Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 261, Issue -, Pages 83-90Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2013.07.001
Keywords
Azo dye; Adsorption; Ionic liquid; Polymers
Categories
Funding
- National Basic Research Program [2009CB930101]
- National Natural Science Foundation of China [91127017]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120131130003]
- Shandong Provincial Natural Science Foundation, China [ZR2012BZ001]
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A novel functional ionic liquid based cross-linked polymer (PDVB-IL) was synthesized from 1-aminoethyl-3-vinylimidazolium chloride and divinylbenzene for use as an adsorbent. The physicochemical properties of PDVB-IL were investigated by Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis. The adsorptive capacity was investigated using anionic azo dyes of orange II, sunset yellow FCF, and amaranth as adsorbates. The maximum adsorption capacity could reach 925.09, 734.62, and 547.17 mg/g for orange 11, sunset yellow FCF and amaranth at 25 degrees C, respectively, which are much better than most of the other adsorbents reported earlier. The effect of pH value was investigated in the range of 1-8. The result shows that a low pH value is found to favor the adsorption of those anionic azo dyes. The adsorption kinetics and isotherms are well fitted by a pseudo second-order model and Langmuir model, respectively. The adsorption process is found to be dominated by physisorption. The introduction of functional ionic liquid moieties into cross-linked poly(divinylbenzene) polymer constitutes a new and efficient kind of adsorbent. (C) 2013 Elsevier B.V. All rights reserved.
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