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Received June 15, 2014
Accepted August 24, 2014
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Preparation and characterization of molecularly-imprinted magnetic microspheres for adsorption of 2,4,6-trichlorophenol from aqueous solutions
1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China 2School of Computer Science, Jilin Normal University, 1301 Haifeng Street, Siping 136000, China 3School of Management, Jilin Normal University, 1301 Haifeng Street, Siping 136000, China 4School of Foreign language, Jilin Normal University, 1301 Haifeng Street, Siping 136000, China
jsdxtzj@126.com
Korean Journal of Chemical Engineering, April 2015, 32(4), 767-776(10), 10.1007/s11814-014-0251-8
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Abstract
Magnetic molecularly imprinted microspheres (MMIS) were successfully prepared by suspension polymerization, and then as-prepared MMIS were used as adsorbents for selective recognition of 2,4,6-trichlorophenol (2,4,6-TCP) from aqueous solutions. The results composites were characterized by Fourier transform infrared (FT-IR), X-ray diffraction (XRD), thermo gravimetric analysis (TGA), scanning electron microscope (SEM) and vibrating sample_x000D_
magnetometer (VSM). The results demonstrated that MMIS possesses porous spherical morphology, and exhibits good thermal stability and magnetic property (Ms=10.14 emu g-1). Then batch mode of binding experiments was used to determine the equilibrium, kinetics and selectivity recognition. The Langmuir isotherm model fitted the equilibrium data better than did the Freundlich model, and the maximum adsorption capacity on MMIS was about 1.7 times higher_x000D_
than that of MNIS. Kinetics behaviors of MMIS were well described by the pseudo-second-order model. MMIS possessed outstanding selectivity recognition for 2,4,6-TCP in the presence of other competitive phenols (such as sesamol, 3-CP, thymol, 2,4-DCP). Furthermore, the reusability performance of MMIS showed about 17.53% loss after five repeated cycles. Finally, the MMIS were successfully applied to the selective extraction of 2,4,6-TCP from the vegetable_x000D_
samples.
Keywords
References
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An FQ, Gao BJ, Desalination, 249(3), 1390 (2009)
