Lithium Recovery Research Articles

Recovery of rare earths and lithium from rare earth molten salt electrolytic slag by lime transformation, co-leaching and stepwise precipitation

The rare earth molten salt electrolytic slag (REMSES) has recently attracted significant attention due to its potential environmental hazards and high content of rare earths and lithium, leading to a surge in recycling efforts. In this study, we propose and demonstrate a novel and straightforward process for the simultaneous extraction of rare earths and lithium from REMSES through lime transformation and sulfuric acid leaching at low temperatures. Firstly, during the lime transformation process, REMSES is converted into hydroxides that can be easily dissolved in acids. Secondly, REEs and Li present in the slag are co-extracted using a conditional sulfuric acid leaching method, resulting in 95.72% REEs leaching efficiency and 99.41% Li leaching efficiency under optimal conditions. Finally, REEs and Li in the solution are precipitated using oxalic acid and trisodium phosphate with precipitation efficiencies of 99.02% for REEs and 94.85% for Li respectively. This innovative process enables the conversion of REEs and lithium from REMSES into high-purity products (a mixture of REOs with 99.31% purity; Li<sub>3</sub>PO<sub>4</sub> with 98.93% purity), thereby facilitating their valuable utilization.

Facile recovery of lithium as Li2CO3 or Li2O from α-hydroxy-carboxylic acid chelates through pyrolysis and the decomposition mechanism

Chelation of lithium with readily available α-hydroxy carboxylic acids is a sustainable recovery method from spent Li-ion battery wastes as well as a possible lithium extraction method. In this work pyrolytic decomposition of a series of selected lithium chelates of glycolic, lactic, malic and tartaric acid were studied and compared with lithium acetate as a potential lithium recovery method from chelates. In thermogravimetric analysis, the four α-hydroxy carboxylic acid chelates studied showed lower initial decomposition temperatures in the 313–356 °C range, in comparison to the lithium acetate with an initial decomposition temperature of 444 °C. The ease of decomposition of α-hydroxy carboxylic acid chelates may be due to their favorable decomposition pathways through dimerization and tetramerization of α-hydroxy acids via esterification and free radical coupling mechanisms leading to a complex mixtures of products; including alkenes, dienes and enones. The lithium α-hydroxy carboxylic acid chelate pyrolysis residue formed above 300 °C was identified as lithium carbonate and further heating above 700 °C, lithium carbonate decomposes to lithium oxide, allowing the recovery of lithium as Li2CO3 or Li2O.

Efficient Recovery of Lithium from Spent Lithium Ion Batteries Effluent by Solvent Extraction Using 2-Ethylhexyl Hydrogen {[Bis(2-Ethylhexyl) Amino]methyl} Phosphonate Acid

In order to overcome the interface emulsification problem of TBP-FeCl3 systems and the instability of β-diketone systems in high-concentration alkaline medium, it is necessary to design and synthesize some new extractants. By introducing amino groups into a phosphorus extractant, a new 2-ethylhexyl hydrogen {[bis(2-ethylhexyl)amino]methyl} phosphonate acid (HA) extractant was synthesized. In this study, an efficient method of recovering lithium from the effluent of spent lithium-ion batteries (LIBs) is proposed. Experiments were conducted to assess the influential factors in lithium recovery, including the solution pH, saponification degree, extractant concentration, and phase ratio. Over 95% of lithium in the effluent was extracted into the organic phase, and nearly all lithium in the organic phase could be stripped into the aqueous phase using a 3 mol/L HCl solution. There was no significant decrease in extraction capacity after 10 cycles. The experimental results indicated that the extraction mechanism was a cation exchange process, and the extractive complex was proposed as LiA. Importantly, after three months of stable operation, the process demonstrated excellent stability and extraction efficiency, with rapid phase separation and a clear interface. This study offers an efficient, cost-effective, and environmentally friendly method for lithium extraction from the effluent of spent LIBs.

A novel integrating approach to assess the role of LiFePO4 battery recycling in the automotive industries in the Greater Bay Area of China

Amidst the swift progression and extensive use of electric vehicles, demands on lithium iron phosphate (LiFePO4) batteries have surged, leading to an imminent scarcity of raw materials for battery manufacturing. This reality heightens the needs for effective battery recycling. This study outlines an integrated evaluation approach of combining laboratory-scale pilot experiment, Monte Carlo Simulations, and Life Cycle Assessment (LCA). An optimized recycling process for LiFePO4 batteries was developed, aiming to salvage and retrieve valuable elements. The process involves lithium's selective leaching followed by subsequent lithium (Li) and iron (Fe) recovery, achieving efficient recovery rates for both Li and Fe. A novel evaluation, integrating economic and environmental aspects, was conducted by employing a direct costs/revenues approach, with the inclusion of stochastic uncertainties determined via Monte Carlo Simulation. Two scenarios are applied to the electric vehicles data of Guangzhou in 2022. The recycling strategy of spent lithium-ion batteries (LIBs) within the Greater Bay Area of China (Scenario A) could potentially save 373.2 million US$, and reduce carbon dioxide emissions by 96,850 tons, compared to manufacturing batteries from mined raw materials and long-distance transportation (Scenario B). This demonstrates the importance of localized, efficient industrial automotive chain within the Greater Bay Area, which besides being cost-effective, offers profound environmental benefits. Other important factors for the result are the efficiency of the developed hydrometallurgical process, the price of the sellable material, and the transport distance. Scenario modeling results from the developed integrating evaluation clearly reveal the significant potential of battery recycling, and the innovative integrating approach has the potential for broader applicability beyond the specific context of our study.

Closed-loop recycling of lithium iron phosphate cathodic powders via citric acid leaching.

Lithium recovery from Lithium-ion batteries requires hydrometallurgy but up-to-date technologies aren't economically viable for Lithium-Iron-Phosphate (LFP) batteries. Selective leaching (specifically targeting Lithium and based on mild organic acids and low temperatures) is attracting attention because of decreased environmental impacts compared to conventional hydrometallurgy. This study analysed the technical and economic performances of selective leaching with 6%vv. H2O2 and citric acid (0.25-1M, 25°C, 1h, 70g/l) compared with conventional leaching with an inorganic acid (H2SO4 1M, 40°C, 2h, 50g/l) and an organic acid (citric acid 1M, 25°C, 1h, 70g/l) to recycle end of life LFP cathodes. After conventional leaching, chemical precipitation allowed to recover in multiple steps Li, Fe and P salts, while selective leaching allowed to recover Fe and P, in the leaching residues and required chemical precipitation only for lithium recovery. Conventional leaching with 1M acids achieved leaching efficiencies equal to 95 ± 2% for Li, 98 ± 8% for Fe, 96 ± 3% for P with sulfuric acid and 83 ± 0.8% for Li, 8 ± 1% for Fe, 12 ± 5% for P with citric acid. Decreasing citric acid's concentration from 1 to 0.25 M didn't substantially change leaching efficiency. Selective leaching with citric acid has higher recovery efficiency (82 ± 6% for Fe, 74 ± 8% for P, 29 ± 5% for Li) than conventional leaching with sulfuric acid (69 ± 15% for Fe, 70 ± 18% for P, and 21 ± 2% for Li). Also, impurities' amounts were lower with citric acid (335 ± 19 335 ± 19 of S mg/kg of S) than with sulfuric acid (8104 ± 2403 mg/kg of S). In overall, the operative costs associated to 0.25 M citric acid route (3.17€/kg) were lower compared to 1 M sulfuric acid (3.52€/kg). In conclusion, citric acid could be a viable option to lower LFP batteries' recycling costs, and it should be further explored prioritizing Lithium recovery and purity of recovered materials.

A facile route for the efficient leaching, recovery, and regeneration of lithium and iron from waste lithium iron phosphate cathode materials

The recycling of lithium iron phosphate power batteries that have exploded in retirement is urgent, but the focus and difficulty of the recycling is the effective recovery of lithium and iron elements in the cathode active material. In this study, the cathode sheets and other components of the lithium-ion batteries were obtained by pretreatment, and the cathode active material and the Al foil of the collector were recovered by stirring with dilute alkali solution (optimized conditions of alkali solution concentration 0.075 mol L-1, liquid–solid ratio 20 mL g−1, and stirring time 40 min). The H2SO4-H2O2 system was used to leach used lithium iron phosphate cathode powder, the leaching process conditions were optimized and the leaching mechanism was revealed. The leaching rates of Li and Fe elements reached 98.79 % and 94.97 %, respectively, at a H2SO4 concentration of 2.5 mol L-1, a H2O2 dosage of 6 mL, a liquid–solid ratio of 25 mL g−1, a leaching temperature of 60 °C and a leaching time of 60 min. The pH value was precisely adjusted in the chemical precipitation method to recover lithium and iron elements from cathode active material. The recovered products FePO4 and Li2CO3 were used as the precursors for the regeneration of LiFePO4 cathode material. The electrochemical performance of LiFePO4/C materials regenerated at 700 °C from the raw material with a lithium to iron molar ratio of 1.03:1 was relatively good, with a first discharge specific capacity of 160.1 mAh g-1 at 0.1 C, and a charge/discharge efficiency of 96.70 % for the first cycle. The good electrochemical performance was still maintained at a higher rate, with a capacity retention of 99.7 % after 100 cycles at 1 C.

Dialkyl(5-ethyl-2-hydroxyphenyl)phosphonates as extractants for the selective recovery of lithium from alkaline media

Dialkyl(5-ethyl-2-hydroxyphenyl)phosphonates as extractants for the selective recovery of lithium from alkaline media

Utilization of lithium sulphate electrodialysis for closed-loop LIB recycling: Experimental study and process simulation

The hydrometallurgical recycling of spent lithium-ion batteries (LIBs) frequently relies on sodium hydroxide and sodium carbonate. This process generates a sodium-enriched solution, requiring treatment prior to safe discharge. This study focuses on a closed-loop recycling process for spent Lithium Nickel Manganese Cobalt Oxide (NMC) cathode material, eliminating sodium ions from conventional hydrometallurgical methods and regenerating acid and precipitant from disposal slurry. It employs lithium hydroxide (LiOH) as the precipitating reagent, while lithium recovery is conducted employing electrodialysis (ED) to regenerate LiOH and sulfuric acid (H2SO4) from the lithium sulfate solution. A part of the LiOH and H2SO4 reagents are subsequently used for the leaching and precipitation steps, creating a closed-loop recycling process. An experimental setup was developed to study the leaching, impurity removal, and metal extraction processes. The closed-loop recycling process was further investigated by simulation of this process. This involved the development of the ED module in both continuous and batch configurations using the Aspen Custom Modeler. This ED module is incorporated into Aspen Plus to integrate with the recycling process under experimental operational conditions. The minimal deviations of 3.34% and 2.38% within the precipitation and co-precipitation processes indicated the accuracy and validity of this work. Utilizing multiple batch-mode ED cells yields a 25% higher recovery of LiOH solution compared to continuous ED cells in the same operation conditions, i.e., employing 48 cells for 96 min under a current density of 1100 A·m−2. Furthermore, increasing the leaching temperature by 60°C yields a 53% increase in lithium leaching efficiency.

A green recycling process for spent lithium-ion batteries with extremely low chemical consumption

Selective recovery of lithium from spent cathodes is an attractive, green and efficient recycling method for spent lithium-ion batteries (LIBs). However, current technologies face numerous challenges including high reagent consumption, limited versatility and significant secondary pollution. In this study, we found that an intermediate phase formed during leaching exhibited high physiochemical stability, which hindered leaching of Li+ and led to increased reagent and energy consumption. A simple mechanical activation strategy was used to change the intermediate phase of the leaching process by activating the spent cathode without grinding additives. The energy input of the mechanical force resulted in defects in the activated waste, leading to a novel activated intermediate phases. Through experimental characterization and DFT analyses, this novel intermediate phase containing H+ was found to have a large specific surface area, large internal stress and low reaction energy, which enabled the leaching of the Li+. As a result, the method showed a high utilization efficiency of H+ in recycling most spent cathodes. In the end, we established a closed-loop recovery route for spent LIBs that exhibited exceptional efficiency for H+ utilization (> 97 %), obviated the need for auxiliary reagents, and substantially reduced secondary pollutant generation.

Lithium Recovery from NCM Lithium Ion Battery by Hydrogen Reduction Followed by Water Leaching

Lithium Recovery from NCM Lithium Ion Battery by Hydrogen Reduction Followed by Water Leaching

Lithium Extraction from Lithium-Bearing Clay Minerals by Calcination-Leaching Method

Lithium is a significant energy metal. This study focuses on the extraction of lithium from lithium-bearing clay minerals utilizing calcination combined with oxalic acid leaching. The relevant important parameters, leaching kinetics analysis, and the lithium extraction mechanism were deeply investigated. The results demonstrate that a high lithium recovery of 91.35% could be achieved under the optimal conditions of calcination temperature of 600 °C, calcination time of 60 min, leaching temperature of 80 °C, leaching time of 180 min, oxalic acid concentration of 1.2 M, and liquid-to-solid ratio of 8:1. According to the shrinkage core model, the leaching kinetics of lithium using oxalic acid followed a chemical reaction-controlled process. XRD, TG, and SEM analysis showed that the kaolinite, boehmite, and diaspore phases in raw ore transformed into corundum, quartz, and muscovite phase in calcination products when the calcination temperature was higher than 600 °C. Moreover, the expansion of the interlayer spacing of minerals during the calcination process could promote the lithium release. During the leaching process, lithium present in the layered silicates was efficiently recovered through ion exchange with the dissociated H+ from oxalic acid. This study could provide a promising guide for lithium extraction from lithium-bearing clay minerals.

Mechanism and process study of lithium extraction by 2-ethylhexyl salicylate extraction system

With the increasing demand for lithium resources, recovery of lithium from solution with high Na/Li ratio is an effective way to meet the growing demand. Salicylate extraction system has been found to be an effective system for Li/Na separation. In this work, the studies of equilibrium, process and mechanism were carried out for the 2-ethylhexyl salicylate (ES) and trialkyl phosphine oxide (TRPO) co-extraction system. The factors affecting lithium extraction such as composition of the organic phase, the conditions of aqueous phase, extraction time and acid-alkali tolerance of the ES extraction system were systematically investigated; According to the equilibrium study, a series of process studies were carried out for lithium recovery from mother solution of lithium carbonate, and the whole process including extraction, elution, stripping and regeneration was designed, and through the process, 99% of lithium was recovered and lithium-rich solution containing 25.85 g/L Li and 0.08 g/L Na was obtained. In the mechanism study, the extraction process was proved as a thermodynamic spontaneous entropy increase process; At the molecular level, the coordination mechanism was first expounded by ultraviolet–visible (UV–Vis) and fluorescence spectrum (Fl), which was further confirmed by 1H NMR and Fourier transform infrared (FT-IR). The current study points a way to separation of lithium from alkaline solutions, which will support the future supply of lithium in a more economical and sustainable manner.

Selective extraction of lithium ions by phosphoroxy-functionalized ionogels from the mother liquor of Li2CO3

Functionalized ionic liquids (FILs), as novel extractants, offer a promising way for the effective separation of Li+, but are limited by their high viscosity which increases the mass transfer resistance and hinders their practical application in industry. To overcome the above problem, this work develops a phosphoroxy-functionalized ionogels (PFIG) with a high specific surface area, hydroxyl-rich groups and porous structure, which was formed by introducing highly hydrophilic [N4444][DEHP] into a silica gel substrate via the sol–gel method. The PFIG can take advantage of the beneficial properties of each component, including the nature of the solid carrier and the Li+ selective extraction ability of [N4444][DEHP]. The high extraction rate of Li+ up to 80.4 % was attained when the content of [N4444][DEHP] in the PFIG composite was 7 mL, which may be due to the strong chelation between [N4444][DEHP] and Li+ and the excellent hydrophilicity of the substrate to increase the mass transfer. Moreover, the competitive extraction experiments indicated that PFIG-7 had excellent high selectivity. Therefore, PFIG-7 has great potential application for lithium recovery from the mother liquor of Li2CO3.

A three-electrode dual-power-supply electrochemical pumping system for fast and energy efficient lithium extraction and recovery from solutions

The demand for Li-ion batteries (LIBs) for use in electric vehicles, which is key to realizing a decarbonized society, is accelerating. However, the supply of Li resources has recently become a major issue, thereby necessitating the development of economical and sustainable technologies of brine/seawater-based Li extraction and recycling Li from spent LIBs. This paper presents an innovative electrochemical pumping technology based on a new cell structure for Li extraction/recovery. This system can provide large electrochemical driving forces while preventing the occurrence of electronic conduction due to electrolyte reduction. This electrochemical pumping system allows extraction/recovery of Li ions from the anode side to the cathode side, rather than the diffusion of other ions, due to the ion-diffusion-bottleneck size of the electrolyte material. Using this system, high-purity Li can be collected with high energy efficiency and at least 464 times faster than that via conventional electrochemical pumping, even with a commercially available Li-ion electrolyte plate.

Adsorptive lithium recovery by magnetic beads harboring lithium-binding peptide

Magnetic beads functionalized with lithium-binding peptides were developed as reusable adsorbents for lithium recovery from aqueous environments. Among three tested peptides, screened as lithium-binding peptides in a previous study, the bead linked to the GPGDP sequence (Pep-D-Bead) exhibited the best adsorption performance, capturing 36.4 mg lithium per gram-over four times more than bare beads without peptides. To further improve the lithium recovery, we fabricated beads incorporating a trimeric repeat of GPGDP (Pep-D3-Bead), achieving a significant increase in adsorption capacity (85.5 mg Li/g bead), which is approximately 2.3-fold higher than Pep-D-Bead. The adsorption isotherm of Pep-D3-Bead followed the Langmuir model with a maximum adsorption load (qmax) of 126.26 mg Li/g bead. Furthermore, the persistence of the lithium-binding efficiency of Pep-D3-Bead was demonstrated over six consecutive adsorption–desorption cycles. Pep-D3-Bead retained more than 72 % of its initial lithium recovery capacity. Finally, the selectivity of the peptide beads for lithium was validated in the presence of competing metal ions, including Pb (II), Ni (II), and Cu (II), highlighting the specificity of the beads for lithium. These properties are crucial for the practical application of these beads in complex real-world aquatic systems in which multiple ions are present.

Coupling redox flow desalination with lithium recovery from spent lithium-ion batteries

Electrochemical redox flow desalination is an emerging method to obtain freshwater; however, the costly requirement for continuously supplying and regenerating redox species limits their practical applications. Recycling of spent lithium-ion batteries is a growing challenge for their sustainable utilization. Existing battery recycling methods often involve massive secondary pollution. Here, we demonstrate a redox flow system to couple redox flow desalination with lithium recovery from spent lithium-ion batteries. The spontaneous reaction between a battery cathode material (LiFePO4) and ferricyanide enables the continuous regeneration of the redox species required for desalination. Several critical operating parameters are optimized, including current density, the concentrations of redox species, salt concentrations of brine, and the amounts of added LiFePO4. With the addition of 0.5920 g of spent LiFePO4 in five consecutive batches, the system can operate over 24 h, achieving 70.46 % lithium recovery in the form of LiCl aqueous solution at the concentration of 6.716 g·L−1. Simultaneously, the brine (25 mL, 10000 ppm NaCl) was desalinated to freshwater. Detailed cost analysis shows that this redox flow system could generate a revenue of ¥ 13.66 per kg of processed spent lithium-ion batteries with low energy consumption (0.77 MJ kg−1) and few greenhouse gas emissions indicating excellent economic and environmental benefits over existing lithium-ion battery recycling technologies, such as pyrometallurgical and hydrometallurgical methods. This work opens a new approach to holistically addressing water and energy challenges to achieve sustainable development.

Nanofiltration Ceramic Membranes as a Feasible Two-Pronged Approach toward Desalination and Lithium Recovery.

Ceramic membranes are taking center stage for separation technologies in water treatment. Among them, ceramic nanofiltration membranes are at the forefront of membrane technologies. The desalination of seawater using ceramic nanofiltration membranes is a potential application toward increasing the global water supply and tackling water scarcity. However, while the high fabrication cost poses a challenge to their large-scale applications, high-value separation applications can help to offset the overall cost. In this regard, ceramic nanofiltration membranes can also be explored as a viable option for high-value lithium extraction from the waste seawater brine. In order to determine the potential of nanofiltration ceramic membranes for desalination and lithium recovery from seawater, the current efficiency of salt rejection across various operation parameters must be thoroughly evaluated. Specifically, the interactions between the Donnan exclusion, steric exclusion, zeta potential, and salt concentration play an important role in determining the salt rejection efficiency. Several strategies are then proposed to guide ceramic nanofiltration membranes toward potentially practical applications regarding desalination and lithium recovery.

A novel Co-doped H2TiO3 spinning composite for efficient lithium recovery from alkaline lithium precipitation mother liquor

The efficient recovery of lithium from the alkaline mother liquor with high Na/Li ratios after Li2CO3 precipitation by adsorption has received extensive attention. However, synthesizing composite adsorbents with excellent adsorption capacity and rate still faces huge challenges. In this work, we synthesized a novel Co-doped Li2TiO3 lithium ion sieve (LTO-1/32Co) using the calcination method. After converting to Co-doped H2TiO3 (HTO-1/32Co) by pickling, the adsorption capacity of the material was 1.4 times higher than that of conventional H2TiO3. To realize the industrial application of the powdered HTO-1/32Co, it was coated with polysulfone (PSF) by the wet spinning method. The saturated adsorption capacity of the material could reach 60.79 mg·g−1, which was at the forefront of reported composite adsorbents. When the adsorbent was applied for lithium recovery from lithium precipitation mother liquor, the adsorption capacity could reach 40.12 mg·g−1, and the equilibrium time was only 50 min. The elution rate of Li+ could be maintained at 90.56 % with the dissolution loss of Ti no more than 0.43 % after six cycles. The developed fibrous composite adsorbent exhibits excellent adsorption/desorption performance and cyclic stability, making it a competitive candidate for efficient lithium recovery from lithium precipitation mother liquor and other lithium-rich alkaline brine resources.

A high-efficiency and low-carbon strategy for selective lithium recovery from spent lithium-ion batteries: Combining mechanochemical activation with biomass reduction roasting

Biomass reduction roasting has attracted considerable attention as an emerging strategy for selectively recovering lithium from spent lithium-ion batteries (LIBs). However, the utilization of excessive roasting conditions in current practices results in significant energy consumption and C emissions, thereby hindering further development. Herein, we propose a novel recycling strategy that combines mechanochemical activation (MCA) with biomass reduction roasting. The optimized roasting conditions with MCA pretreatment achieve a 100 °C reduction in roasting temperature, a halving of biomass ratio and roasting time, compared to the case without activation. By analyzing the changes in physicochemical properties of mixed samples (cathode materials and biomass) under different activation conditions and their impacts, the action mechanism of MCA on biomass reduction roasting is revealed. The introduction of MCA pretreatment achieves milder roasting conditions by promoting homogeneous mixing and disrupting NCM crystal structures through the “pre-oxygen elements removal” process. Furthermore, mechanical treatment was applied to enhance the carbonated water leaching process. The results of sustainability analysis and economic evaluation demonstrate that the proposed recycling strategy not only reduces CO2 emissions and energy consumption but also generates considerable benefits. Overall, this high-efficiency and low-carbon recycling strategy provides a promising direction for the development of spent LIBs recycling technology.

Development of a Manganese Dioxide-Decorated Activated Carbon Nano-sorbent via Co-precipitation method for efficient lithium ion adsorption from aqueous solutions

ABSTRACT Recently, the utilization of lithium has increased significantly, particularly in high-tech industries such as nuclear, aerospace, automotive, battery, military, glass and ceramic, and lubricants. However, lithium recovery methods from brines present certain drawbacks, making lithium exploitation a global challenge. A comparative analysis of lithium recovery methods from brine solutions indicates that the adsorption method holds promising potential for separating lithium from low-concentration solutions. Despite this, the quest for an effective and efficient adsorbent for lithium-ion adsorption remains a challenge, necessitating the development of an adsorbent, using readily available materials. In this study, carbon-active underwent chemical modification. Notably, the co-precipitation method was employed for the first time to create a composite adsorbent decorated with manganese dioxide (MnO2). Various analyses, including XRD, SEM-EDS, FTIR, and BET, were conducted to elucidate the structural, morphological, physical, and chemical properties of the adsorbent. This synthesized adsorbent was applied to the adsorption of lithium from an aqueous sample. Exploration of adsorption parameters affecting capacity led to the identification of optimal conditions: 14-hour duration, an adsorbent dosage of 0.02 g, and an ambient temperature of 25°C, in a lithium solution with a concentration of 60.4 ppm. Under these conditions, the maximum adsorption capacity of the adsorbent was determined to be 30.5 mg/g. Based on experimental results, kinetic and adsorption isotherm models were investigated. The Pseudo-quadratic kinetic model, with an R2 value of 0.999, emerged as the most suitable for describing the adsorbent’s behavior. The Hill isotherm model with R2 = 0.9634 is the most appropriate isotherm model to describe the adsorbent behavior. Additionally, the selectivity of the adsorbent in the presence of other ions was investigated. The adsorbent’s reusability was examined, and after two recycling periods, the adsorbent maintained an efficiency of up to 88%, demonstrating its stability. The CAC-MnO2-P composite adsorbent shows technical and economic promise for industrial use in lithium-ion recovery processes.