Volume 129, Issue 4 pp. 1952-1958
Article

Selective recognition of beta-cypermethrin by molecularly imprinted polymers based on magnetite yeast composites

Wei-Sheng Guan

Corresponding Author

Wei-Sheng Guan

Ministry of Education, College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China

College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China===Search for more papers by this author
Jun-Ru Lei

Jun-Ru Lei

Ministry of Education, College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China

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Xu Wang

Xu Wang

Ministry of Education, College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China

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Ya Zhou

Ya Zhou

Ministry of Education, College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China

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Chen-Chen Lu

Chen-Chen Lu

Ministry of Education, College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China

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Shao-Fang Sun

Shao-Fang Sun

Ministry of Education, College of the Environmental Science and Engineering, Chang'an University, Xi'an 710054, People's Republic of China

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First published: 03 January 2013
Citations: 9

Abstract

Magnetic nanoparticles were attached to yeast by co-precipitation reaction of FeCl3·6H2O and FeCl2·4H2O. Then, based on magnetite yeast composites (M@Y), the magnetic molecularly imprinted polymers (MMIPs) were synthesized for the selective recognition of beta-cypermethrin (PP321). MMIPs were characterized by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared analysis, thermogravimetric analysis, and elemental analysis. MMIPs exhibited uniform morphology and magnetic property (Ms = 17.87 emu/g) and thermal stability. Batch mode adsorption studies were carried out to investigate the specific adsorption equilibrium, kinetics, and selective recognition. The Langmuir isotherm model was fitted to the equilibrium data slightly better than the Freundlich model, and the adsorption capacity of MMIPs was 39.64 mg/g at 298 K. The kinetic properties of MMIPs were well described by the pseudo-second-order equation. Hydrogen bonds between methacrylic acid and PP321 were mainly responsible for the adsorption mechanism. The MMIPs prepared were applied to the separation of PP321 from experimental samples successfully. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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