期刊
CHEMICAL ENGINEERING JOURNAL
卷 266, 期 -, 页码 299-308出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.11.126
关键词
Lignin; Molecularly imprinted multi-hollow microspheres; Pickering double emulsions; Selective adsorption; Lambda-cyhalothrin
资金
- National Natural Science Foundation of China [21107037, 21446005]
- Natural Science Foundation of Jiangsu Province [BK20131223]
- Special National Postdoctoral Science Foundation [2014T70480]
- National Postdoctoral Science Foundation [2013M530240]
- Postdoctoral Science Foundation of Jiangsu Province [1202002B]
- Programs of Senior Talent Foundation of Jiangsu University [12JDG090]
In this work, lignin was simply tailored by chemical modification with oleic acid, and then surfactant-free water-in-oil-in-water (W-1/O/W-2) Pickering double emulsions were formed by stabilizing two types of lignins (original and modified) at both interfaces. Based on as-prepared W-1/O/W-2 emulsions, three kinds of molecularly imprinted multi-hollow microspheres (denoted as MIMMs1, MIMMs2 and MIMMs3) were fabricated and evaluated as adsorbents to selective removal of lambda-cyhalothrin (LC). MIMMs exhibited tunable pore structures (size and number of inner pores) by adjusting the volume ratio of internal water phase to the medium oil phase (W1O), and MIMMs2 showed the larger adsorption capacity than those of MIMMs2 and MIMMs3, resulting from the common action mechanism of more and larger inner pores. Static adsorption experiments showed that equilibrium time was about 3.0 h, and the equilibrium adsorption amount was 24.79 mg g(-1) for MIMMs2. The selective recognition experiments exhibited the obviously selective adsorption effect of the MIMMs2 for target LC, and MIMMs2 could be effectively regenerated and recycled at less seven times without significant loss of adsorption capacity. Overall, batch mode data suggested that MIMMs2 may be useful for the selective removal of LC from aqueous media. (C) 2014 Elsevier B.V. All rights reserved.
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