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Recovery of Li+ from geothermal water has been investigated using a combination of adsorptive separation with magnetite and λ-MnO2 adsorbents. The inhibition of Li+ adsorption together with decomposition of λ-MnO2 was observed when geothermal water containing As was fed to the column in which λ-MnO2 was packed. Magnetite (Fe3O4) was therefore used for removal of As from the geothermal water, prior to adsorption of Li+. Using As removal from the geothermal water with magnetite, decomposition of λ-MnO2 was significantly prevented during adsorption of Li+, although a small amount of As still remained.
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Park et al. (2012) studied this question.
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