Abstract
Interest in lithium sources has been increasing because of wide applications of the metal in high-energy storage lithium batteries and its compounds in other fields. Lithium is found in sea and geothermal waters, lakes, brines and several minerals. Among several methods that have been suggested for the extraction of lithium from these resources such as adsorption (ion exchange), solvent extraction and co-precipitation, the adsorption method is more suitable for recovery of lithium from seawater because certain inorganic ion-exchange materials show extremely high selectivity only for lithium ions. The objective of this study is to evaluate the applicability of nano-structured zirconium oxide adsorbent for the recovery of lithium from the brine. The investigations on structure and chemical composition, morphology and Li+ adsorption properties of the adsorbents were carried out by X-ray diffractometer, field emission gun scanning electron microscope and atomic absorption spectrophotometer, lithium ion adsorptive isotherm and kinetic measurement. It was found that zirconium ion sieves had potential application for lithium recovery from aqueous phases, and under optimized conditions the maximum lithium uptake has been obtained 17 mg/g in lithium chloride solution. Kinetic experiments suggested that the adsorption process followed the Freundlich model.
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