Recovery of Lithium from Wastewater Using Development of Li Ion-Imprinted Polymers

By Xubiao Luo, Bin Guo, Jinming Luo, Fang Deng, Siyu Zhang, Shuai Luo, John C. Crittenden. 2015

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Recycling lithium from waste lithium batteries is a growing problem, and new technologies are needed to recover the lithium. Currently, there is a lack of highly selective adsorption/ion exchange materials that can be used to recover lithium. We have developed a magnetic lithium ion-imprinted polymer (Fe3O4@SiO2@IIP) by using novel crown ether. The Fe3O4@SiO2@IIP has been synthesized by a surface imprinting technique using our newly synthesized 2-(allyloxy) methyl-12-crown-4 as a functional monomer. The Fe3O4@SiO2@IIP was analyzed by Fourier infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The optimum pH for adsorption is 6. Fe3O4@SiO2@IIP shows fast adsorption kinetics for lithium ions (10 min to reach complete equilibrium), and the adsorption process obeys an external mass transfer model. Homogeneous binding sites are proved by the Langmuir isotherm, and the maximum adsorption capacity is 0.586 mmol/g. Fe3O4@SiO2@IIP has excellent selectivity for Li(I) beca...

Subfields: Industrial and Manufacturing Engineering, Inorganic Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/0bf91ee961b2b6b13a976c3ac4672fd30bdf63a3