<p>Lithium in bauxite generally enters into sodium aluminate solution during the digestion step of the Bayer process, leading to adverse effects on alumina production. To mitigate this problem, this study synthesized a Fe-doped titanium-based lithium-ion sieve and systematically investigated its adsorption performance of lithium from sodium aluminate solution. The doped lithium-ion sieve had a specific surface area of 31.077 m²&#xa0;g⁻¹, representing a 157.98% increase compared to that before doping. Adsorption efficiency of the doped lithium-ion sieve increased from 36.30% to 54.26% under a dosage of 2 g&#xa0;L⁻¹, a temperature of 373 K, and a time of 2 h. Meanwhile, an adsorption capacity of 16.28 mg&#xa0;g⁻¹, a Ti dissolution loss of 0.30%, and an alumina hydrolysis loss of 2.41% were achieved. The adsorption process of the Fe-doped lithium-ion sieve in sodium aluminate solution could be well described by the quasi-secondary kinetic model and the Freundlich isothermal model, which agrees with the multilayer chemical adsorption. The results provide insights into lithium recovery from sodium aluminate solution.</p>