| In this investigation, natural bauxite (NBX) was used as raw material to prepare bauxite based Li+ adsorbent (SATA-AIS-LDH-BX) by solid phase alkali-thermal acid-in situ method, and the adsorption properties of the material to simulated Li+ solution and actual Li+ brine were investigated. The adsorbents were characterized by SEM, EDS, XRD, FT-IR and XPS. The results showed that LiCl?2Al(OH)3?nH2O was present in the adsorbent structure .SATA-AIS-LDH-BX had better adsorption capacity in neutral environment. In the presence of Na+, K+, Ca2+ and Mg2+, it had certain selective adsorption capacity for Li+. The adsorption kinetics and adsorption isothermal model were consistent with the second-order kinetics model and Langmuir model. The saturated adsorption capacity was 1.54 mg/g at 298K. In the actual brine adsorption, when the solid-liquid ratio is 1.8g /25 mL, the adsorption rate of SATA-AIS-LDH-BX for Li+ in brine was 81.64%, and after 5 cycles of elution and adsorption, the adsorption capacity of SATA-AIS-LDH-BX for Li+ was reduced by 12.26%, indicated that the good regeneration performance of the material. |