Abstract
The rapid growth of demand for lithium, especially in lithium batteries calls for an increase in the supply of lithium resources. We synthesized H1.33Mn1.67O4 adsorbent by solid-phase reaction method to recover lithium for the first time from shale gas flowback and produced water (SGFPW) in the Sichuan Basin, China. Na2CO3 precipitation pre-treatment was employed to improve the adsorption capacity and selectivity of lithium. The adsorption capacity of lithium in the pre-treated water (P-SGFPW) was 16.24 mg/g higher than that in SGFPW (13.27 mg/g), and the partition coefficient of Li+ increased from 731.58 to 1073.58 mL/g after precipitation. After four cycles of adsorption and desorption, the adsorption capacity of lithium was stable and showed only a slight decrease equal to 3.53% and 5.35% in P-SGFPW and SGFPW, respectively. H1.33Mn1.67O4 is a promising adsorbent for lithium extraction from SGFPW, and precipitation before adsorption can improve its performance significantly.
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