期刊
RSC ADVANCES
卷 5, 期 14, 页码 10611-10618出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra11177j
关键词
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资金
- National Natural Science Foundation of China [21105117, 31160317, 21175084, 21307052, 21275068]
- Natural Science Foundation of Shandong Province of China [ZR2013BL006]
- Key Laboratory of Coastal Zone Environmental Processes, YICCAS [201207]
A facile strategy was developed to prepare magnetic molecularly imprinted microspheres (MMIMs) for the selective recognition and effective removal of 17-beta-estradiol (17b-E2) by reversible addition-fragmentation chain transfer precipitation polymerization. One-pot synthesis was employed, which could simplify the imprinting process and shorten the experimental period. The resultant MMIMs displayed fast kinetics and high binding capacity, and the adsorption processes followed Langmuir-Freundlich isotherm and pseudo-second-order kinetic models. Excellent recognition selectivity toward 17b-E2 was attained over other phenolic estrogens such as 17-alpha-E2, estriol and estrone. The magnetic property of MMIMs provided fast and simple separation, and the recycling process for magnetic solid phase extraction (MSPE) was sustainable at least five times without obvious efficiency decrease. Furthermore, the MMIMs-MSPE presented satisfactory recoveries within 71.7-108.3% with the precisions of 1.1-6.0% for spiked 17b-E2 in water, soil and food samples. The developed MMIMs-based method proved to be a convenient and practical way in sample pretreatment and targeted pollutants removal.
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