文献类型：期刊文献

英文题名：Granulating-avoiding aluminum-based adsorbents for fast salt lake lithium extraction with low freshwater consumption

作者：Cao, Yujiao[1,2];Chen, Jun[1,2];Lin, Sen[1,3,4];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Salt Lake Resources Proc Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[4]Qinghai Univ, Salt Lake Chem Engn Res Complex, Xining 810016, Peoples R China

年份：2025

卷号：523

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20253719147413);WOS:【SCI-EXPANDED(收录号:WOS:001585835700005)】；

基金：This work was sponsored by the National Natural Science Foundation of China (92475114, 92475207) and the Salt Lake Chemical Engineering Research Complex, Qinghai University (2024-DXSSKF-01) .

语种：英文

外文关键词：Granulating-avoiding adsorbent; Lithium extraction; Aluminum substrate; Structural stability; Salt lake brine

摘要：Lithium aluminum layered double hydroxides (Li/Al-LDHs) have demonstrated great applicability for industrial lithium extraction from salt lakes. This study developed a novel universal granulating-avoiding strategy for Li/AlLDHs in situ preparation using various aluminum substrates, eliminating high mass transfer resistance and excessive rinse freshwater consumption. Gradual alkaline etching and Li+ insertion formed a stable Li/Al-LDHs layer on the substrate, with a thick interfacial transition zone that endowed these granulation-avoiding Li/AlLDHs (GALDHs) with high structural stability. Experimental results demonstrated GALDHs maintained stable Li+ adsorption performance over multiple adsorption-desorption cycles under enhanced desorption conditions. Time-of-flight secondary ion mass spectrometry (TOF-SIMS) and density functional theory (DFT) calculation confirmed the direct exposure of Li+ adsorption sites in GALDHs could significantly reduce mass transfer resistance and brine adhesion during adsorption. Consequently, adsorption equilibrium could achieve within 15 min, accompanied by a halved rinse freshwater consumption and a lithium loss reduced by 40.48 %.