Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 175, Issue -, Pages 19-26Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.seppur.2016.11.029
Keywords
Macroporous; Ion imprinted membranes; Crown ether; Lithium ion; Selective separation
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Funding
- National Natural Science Foundation of China, China [U1507118, U1407123, 21406085]
- Natural Science Foundation of Jiangsu Province, China [BK20151350, BK20140580, BK20161367]
- China Postdoctoral Science Foundation Funded Project, China [2014M561588, 1501067C]
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A macroporous polymer-ion imprinted macroporous membranes (IIMMs) was synthesized using Poly (vinylidene fluoride) (PVDF) as membrane matrix and crown ether (CE) as function monomer by using phase inversion technique. In addition, dopamine (DA) was introduced between PVDF membrane matrix and imprinted layer to ensure combinative in a stable fashion. Attributing to the unique properties of CE can react with alkali metal ions to form a stable complex, promoting the growth of large and homogeneous specific recognition cavity on the surface of IIMMs, hence the IIMMs exhibited highly effective in separation performance of template ion (Li+). Classical adsorption isotherms including Langmuir and Freundlich and kinetic toward Li+ of IIMMs and NIMMs were employed to describe the adsorption equilibria. The excellent separation (maximum selectivity factor alpha is 4.42) and recognition behavior coupling with the low preparation consumed and green, quick, facile synthesis conditions make the as-prepared IIMMs attractive in broad technological applications of recognition and separation of Li+ in salt lake. (C) 2016 Elsevier B.V. All rights reserved.
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