Improvement of lithium adsorption capacity by optimising the parameters affecting synthesised ion sieves

Abstract

Recent study has shown that the spinel type of MnO 2 nanoparticles have a required capacity for lithium extraction from liquid resources. The low lithium adsorption capacity of synthesised ion sieves was found to be an important limiting parameter for their use in industrial applications. Therefore, increasing the uptake capacity of different ion sieves by studying the effect of six effective parameters, involving lithium salt compound, manganese salt compound, oxidising reagent, calcination temperature, heating time and Li/Mn mol ratio, on the synthesised ion sieves was investigated. Hence, in this reported work, a specific approach based on the L 9 (3 4) Taguchi orthogonal array was employed to evaluate these parameters and to optimise them in two separate stages. Also, the relative importance of each factor was determined using analysis of variance. Although, all mentioned parameters had a significant effect on lithium uptake capacity, the oxidising reagent and the lithium salt compound were the most effective factors. Also, an appropriate ion sieve with a lithium adsorption capacity of more than 9 mmol g −1 was synthesised for the first time.

Geological Insights into Exploration and Extraction of Lithium from Oilfield Produced-Water in the USA: A Review

“…However, aluminum-based adsorbents may exhibit lower extraction efficiency compared to other methods, requiring longer contact times to achieve desired lithium concentrations. Manganese-based adsorbents present an alternative approach, capitalizing on the adsorption capabilities of manganese compounds to selectively capture lithium ions from brine solutions. ,,− While manganese-based adsorbents offer higher extraction efficiency than aluminum-based counterparts, they may entail higher production costs and environmental considerations due to the use of manganese compounds, which can be toxic if released into the environment.…”

Preparation of Manganese Dioxide Lithium Ion Sieve and Its Application in Lithium Extraction from Coal Fly Ash

“…When the elution time is short, H + cannot completely replace Li + in the solution. When the time is too long, H + completely replaces Li + in the solution, and at this time the reaction products of HCl and other substances affect the lithium elution efficiency [44]. Therefore, based on a comprehensive data analysis, an elution time of 40 min was optimum.…”

A Facile Synthesis of Hexagonal Spinel λ-MnO2 Ion-Sieves for Highly Selective Li+ Adsorption

“…However, the ratio of magnesium to lithium in the salty brine is extremely high, making it difficult to extract and recover lithium using conventional separation technologies [5,6]. Compared with precipitation and solvent extraction methods, ion-sieve adsorption has many technical merits, such as excellent selectivity and relatively low cost [7,8], which is considered to be the most promising environmentally benign technology for extracting lithium from salt lakes [9,10].…”