文献类型：期刊文献

英文题名：Double-edged role of interlayer water on Li+ extraction from ultrahigh Mg2+ /Li+ ratio brines using Li/Al-LDHs

作者：Lin, Sen[1,5];Pan, Yanan[1];Du, Jianglong[2,3];Yang, Yong[4];Su, Haiping[2,3];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai, Peoples R China;[2]Chinese Univ Sci & Technol, State Key Lab Chem Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai, Peoples R China;[4]Northwestern Polytech Univ, Ctr Adv Lubricat & Seal Mat, State Key Lab Solidificat Proc, Xian, Shaanxi, Peoples R China;[5]Shanghai Inst Pollut Control & Ecol Secur, Shanghai, Peoples R China

年份：2022

卷号：627

起止页码：872

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20223012419694);WOS:【SCI-EXPANDED(收录号:WOS:000888401800011)】；

基金：This work was sponsored by the National Natural Science Foundation of China (21978094, U20A20142), Shanghai Pujiang Program (2019PJD011) and Major Science and Technology Projects of Qinghai Province (2019-GX-A7).

语种：英文

外文关键词：Li/Al-LDHs; Interlayer water; Adsorption selectivity; High Mg2+/Li+ ratio brine; Lithium recovery

摘要：Lithium-aluminum layered double hydroxides (Li/Al-LDHs) are the only industrial adsorbents for Li+ extraction from Mg2+/Li+ ratio brines dependent on the special neutral desorption without dissolution damage. In this work, Li/Al-LDHs with different interlayer water contents were designed for the investigation of correlation between interlayer water and Li+ adsorption performances in high Mg2+/Li+ ratio brines. On the one hand, the Li+ adsorption capacity of Li/Al-LDHs in the Qarham Salt Lake old brine with a Mg2+/Li+ ratio exceeding 300 presented a positive correlative relation with the interlayer water content, rising from 1.05 mg/g to 7.89 mg/g as the interlayer water content increased from 5.52% to 18.18%. On the other hand, the interlayer water content would not affect the structure stability of Li/Al-LDHs, while the interlayer spacing was lessened with less interlayer water resulting in an uptrend to the adsorption selectivity on account of the depressed confinement effect. The density functional theory (DFT) calculation further indicated that LiCl was easier to enter the structure of Li/Al-LDHs with more interlayer water in view of the greater interaction energy. (C) 2022 Published by Elsevier Inc.