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Issue 20, 2018
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2-Methylol-12-crown-4 ether immobilized PolyHIPEs toward recovery of lithium(I)

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A facile strategy to fabricate crown ether (2-methylol-12-crown-4, 2M12C4) immobilized porous polymers (PGMA-CE) was reported toward lithium(I) (Li+) recovery. Macroporous polymer foam (polymeric glycidyl methacrylate, PGMA) with abundant epoxy groups was firstly prepared as a support using a high internal phase emulsion (HIPE) template. And then 2M12C4 was covalently attached onto the surface of PGMA to endow the PGMA-CE with good stability and high selectivity. PGMA-CE was characterized by SEM, FT-IR, XPS, and 13C NMR spectroscopy, and its porous structure and the successful introduction of 2M12C4 were confirmed. In batch mode experiments under optimum conditions, PGMA-CE exhibited fast adsorption kinetics (the equilibrium time was 3.0 h), and the kinetics data were well described using a pseudo-second-order model. A Langmuir-type monolayer adsorption was investigated, and the calculated maximum equilibrium adsorption capacity was 3.15 mg g−1. In addition, PGMA-CE displayed excellent selectivity for Li+ in the presence of multiple interfering ions (Na+, K+, Mg+, and Ca2+), and the selective separation factors (α) were above 4.75. Regeneration analysis showed that the adsorption capacity of PGMA-CE toward Li+ after five cycles was 91.8% of the first cycle.

Graphical abstract: 2-Methylol-12-crown-4 ether immobilized PolyHIPEs toward recovery of lithium(i)

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Publication details

The article was received on 23 Apr 2018, accepted on 15 Aug 2018 and first published on 06 Sep 2018

Article type: Paper
DOI: 10.1039/C8NJ01961D
Citation: New J. Chem., 2018,42, 16814-16822

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    2-Methylol-12-crown-4 ether immobilized PolyHIPEs toward recovery of lithium(I)

    W. Huang, S. Liu, J. Liu, W. Zhang and J. Pan, New J. Chem., 2018, 42, 16814
    DOI: 10.1039/C8NJ01961D

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