期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 205, 期 -, 页码 179-188出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2011.12.056
关键词
Magnetic molecularly imprinted nanoparticles; Atom transfer radical emulsion polymerization; Selective recognition; Aqueous medium; Tetracycline
资金
- National Natural Science Foundation of China [21077046, 21107037, 21176107, 21174057]
- Ph.D. Programs Foundation of Ministry of Education of China [20093227110015]
- Ph.D. Innovation Programs Foundation of Jiangsu Province [CX10B_276Z]
- Natural Science Foundation of Jiangsu Province [SBK201122883]
In the work, we reported an effective method for the preparation of molecularly imprinted nanoparticles with superparamagnetic susceptibility through atom transfer radical emulsion polymerization (ATREP), and then as-prepared magnetic molecularly imprinted nanoparticles (MMINs) were evaluated as adsorbents for selective recognition of tetracycline (TC) molecules from aqueous medium. The resulting nanoparticles were characterized by FT-IR, TGA, VSM, SEM and TEM. The results demonstrated MMINs with a narrow diameter distribution were cross-linked with modified Fe3O4 particles, composed of imprinted layer and exhibited good magnetic sensitivity, magnetic and thermal stability. Batch rebinding studies were carried out to determine the specific adsorption equilibrium, kinetics, and selective recognition. The estimated adsorption capacity of MMINs towards TC by the Langmuir isotherm model was 12.10 mg g(-1) at 298 K, which was 6.33 times higher than that of magnetic non-molecularly imprinted nanoparticles (MNINs). The kinetic property of MMINs was well-described by the pseudo-second-order rate equation. The results of selective recognition experiments demonstrated outstanding affinity and selectivity towards TC over competitive antibiotics. The reusability of MMINs showed no obviously deterioration at least five repeated cycles in performance. In addition, the MMINs prepared were successfully applied to the extraction of TC from the spiked pork sample. (C) 2011 Elsevier B.V. All rights reserved.
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