Preparation and Characterization of a Cylinder-Type Adsorbent for the Recovery of Lithium from Seawater

Abstract

In this work, a spinel lithium manganese oxide (LMO) used as a lithium adsorbent was prepared with a conventional solid state reaction using lithium carbonate and manganese carbonate as the reactants. A cylinder-type LMO was prepared using water glass (sodium silicate solution) as a binder together with the reactants and examined for its lithium adsorption capacity. The effect of the preparation condition on the adsorption capacity of the LMO powder was investigated. The optimum heating condition for the LMO powder, determined to be 500°C for 4 h, was applied to prepare the cylinder-type LMO. The cylinder-type LMO showed a maximum adsorption capacity of 15.06 mg/g when immersed in lithium-enriched seawater, whereas LMO powder showed a maximum adsorption capacity of 27.62 mg/g under identical conditions. The cylinder-type LMO generally maintained its structure after the acid treatment and the Li adsorption process. Thus, the cylinder-type LMO developed in this study can overcome the limits associated with powder-type adsorbents and may be appropriate for multiple adsorption runs in seawater.

Lithium recovery from brine using a λ-MnO2/activated carbon hybrid supercapacitor system

“…These adsorbents are highly selective to lithium ion and efficient for lithium recovery. However, additional process for the adsorbent such as granulation, membranization for industrial application is necessary, at the same time, leaving the concern for decreasing the capacity or the rate of lithium recovery (Umeno et al, 2002;Ryu et al, 2013b). Also, a couple of weeks of adsorption are followed by adsorbent regeneration using a strong acid.…”

Adsorption–Desorption Properties of Granular EP/HMO Composite and Its Application in Lithium Recovery from Brine

“…The total dissolution of manganese ion is 0.12% or 6.7 mg after 30 cycles, showing that the EP/HMO composite has good stability. In the conventional method, 18,21,22,26,27 the adsorption process is completed when the adsorbent is saturated with Li + , and then the desorption is carried out, which takes a long time for a single cycle (Table 3). In this study, it was observed that the adsorptive efficiency (Figure 7) was higher in the early stage than that in the later stage and 1.25 h was chosen as the adsorption time in the optimized method.…”

Global Lithium Sources—Industrial Use and Future in the Electric Vehicle Industry: A Review

“…Lithium is the 14th most abundant element in seawater. Its concentration varies across different oceans, despite this it is largely accepted to occur in seawater at a concentration between 0.14 and 0.20 mg/L (Table S3, Supplementary Material [14,17,26,[36][37][38][39][40][41][42]). An average lithium concentration of 0.17 mg/L is often reported.…”