Sorption-based lithium recovery from Aral Sea brines: process development and experimental validation

This study presents the development and experimental substantiation of a sorption-based process for selective lithium recovery from highly mineralized brines. The process integrates alkaline precipitation of interfering cations with dynamic sorption using acetophosphate cellulose as a selective sorbent. The static exchange capacity of the developed sorbent was determined as 25.48 mg/g, with lithium desorption efficiency reaching 98.25% and sorbent stability maintained through 10 consecutive sorption-desorption cycles (93% capacity retention). The process demonstrates selective lithium extraction under moderate temperature conditions without toxic organic solvents, providing a scientific foundation for subsequent technological development and pilot-scale implementation. The results demonstrate both scientific significance and technological applicability of the proposed process.

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