It was confirmed that the detrimental effect of SO₄^2– on Li⁺ desorption and readsorption intensified with the increase of the SO₄^2–/Cl^– ratio, resulting in application limitations of aluminum-based adsorbent (Li/Al-LDHs) in sulfate-type brines. Based on the interlayer anion exchangeability of Li/Al-LDHs, a one-step interlayer restoration strategy was designed with the assistance of molecular dynamics to rapidly substitute the intercalated SO₄^2– with preferentially desorbed Cl^–, aiming to fundamentally address the damage to the cycling performance. The strategy effectiveness was verified by the restored adsorption and desorption capacities in various sulfate-type brines. Furthermore, enhanced lithium extraction processes for sulfate-type brines were established and showed universal applicability for complex brines with different compositions during fixed-bed cycles. By regulating the implementation frequency, the Li⁺ extraction efficiency was improved, in which the extraction amount per unit time could increase by more than 100% compared with the conventional process.

中文翻译：

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硫酸盐型卤水中锂吸附工程增强的即时层间恢复策略


证实SO ₄ ^2– 对Li ⁺ 脱附和再吸附的不利影响随着SO ₄ 的增加而增强< b4> /Cl ^– 比值，导致铝基吸附剂（Li/Al-LDHs）在硫酸盐型盐水中的应用受到限制。基于Li/Al-LDHs的层间阴离子交换性，借助分子动力学设计了一种一步式层间修复策略，优先快速取代插层的SO ₄ ^2– 。解吸Cl ^– ，旨在从根本上解决对循环性能的损害。通过在各种硫酸盐型盐水中恢复的吸附和解吸能力验证了该策略的有效性。此外，还建立了硫酸盐型卤水的强化锂提取工艺，并在固定床循环过程中显示出对不同成分的复杂卤水的普遍适用性。通过调节实施频率，提高了Li ⁺ 的提取效率，单位时间的提取量较常规工艺提高100%以上。