The Dead Sea, a live pool of minerals and elements, holds ~9% of the world's known lithium reserves. However, the low lithium concentrations (30–40 mg/L) in the end brine and the high divalent to lithium ratio (Mg⁺² + Ca⁺² to Li⁺) were obstacles that must be overcome to extract the lithium. In our previous work, lithium concentrations in the Dead Sea end brine were enriched by chemical precipitation up to 1700 mg/kg in the produced solid precipitate. The obtained precipitate was decomposed by double-distilled water, and about 66% of lithium was leached, producing an environmental liquor containing an elevated concentration of lithium. A sequential ion exchange technique was used to achieve selective lithium recovery in this study. The ability of the UBK 10 strong acid-type cation exchange resin (Na type) to remove lithium from simulated and environmental lithium-bearing solutions was investigated. Because of the complex matrix comprising components that may compete with lithium adsorption, a greater quantity of adsorbent was required to achieve the equilibrium state for the environmental solution (7 g) compared to (3.6 g) for the simulated solution. For both lithium-bearing solutions, the kinetics investigation revealed a pseudo-second-order tendency. The interfering capacity was determined to be 0.405, confirming the UBK 10 challenge to selective lithium adsorption. The divalent to lithium ratio was decreased by more than 50 times, yielding encouraging findings for extracting lithium from the low lithium—high divalent to lithium sophisticated Dead Sea end brines.

中文翻译：

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使用 UBK10 离子交换树脂从死海末端卤水中选择性回收锂

死海是一个活泼的矿物和元素池，拥有世界已知锂储量的约 9%。然而，最终盐水中的低锂浓度 (30–40 mg/L) 和高二价锂比 (Mg ⁺²  + Ca ⁺² to Li ⁺) 是提取锂必须克服的障碍。在我们之前的工作中，死海末端盐水中的锂浓度通过化学沉淀在产生的固体沉淀物中增至高达 1700 mg/kg。所得沉淀物经双蒸水分解，约66%的锂被浸出，得到高浓度锂的环保液。本研究采用顺序离子交换技术实现选择性锂回收。研究了 UBK 10 强酸型阳离子交换树脂（Na 型）从模拟和环境含锂溶液中去除锂的能力。由于复杂的基质包含可能与锂吸附竞争的成分，与模拟溶液 (3.6 g) 相比，环境溶液 (7 g) 需要更大量的吸附剂才能达到平衡状态。对于两种含锂溶液，动力学研究揭示了伪二级趋势。干扰容量被确定为 0.405，证实了 UBK 10 对选择性锂吸附的挑战。二价锂比降低了 50 倍以上，这为从低锂-高二价锂复杂的死海末端卤水中提取锂提供了令人鼓舞的发现。确认 UBK 10 对选择性锂吸附的挑战。二价锂比降低了 50 倍以上，这为从低锂-高二价锂复杂的死海末端卤水中提取锂提供了令人鼓舞的发现。确认 UBK 10 对选择性锂吸附的挑战。二价锂比降低了 50 倍以上，这为从低锂-高二价锂复杂的死海末端卤水中提取锂提供了令人鼓舞的发现。