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Editors: Tsing L, Luo AQ
ISBN: 978-94-6252-151-3
Volume number: 49
Conference information: Proceedings of the 2015 2nd International Conference on Machinery, Materials Engineering, Chemical Engineering and Biotechnology (MMECEB)

Abstract: Several different Li+-imprinted gels were prepared by different precursors. And the gels were characterized by textual properties and point of zero charges (PZCs). The adsorption of Li+ from their aqueous solutions by the gels was investigated. The surface areas of the gels were found to range from 60 to 633 m2/g depending on the gel composition. In general, most of the gels are microporous with a pore size smaller than 2 nm. The gels have PZCs ranging from 1.25 to 3.20 after acidification with HCl solution. The adsorption amount of Li+ was affected by the composition of different gels significantly. Different gels present different adsorption amount with the gel derived from aminopropyltriethoxysilane (APTES) and tetraethoxysilane (TEOS) having the highest adsorption amount of 0.25 mmol/g. Ion exchange should be an important mechanism for the adsorption with the size of lithium ions exactly fits the cavity of the gel adsorbents.
Template and target information: lithium ion, Li(I)
Author keywords: Li+-imprinting, Hybrid gel, adsorption, ion exchange