文献类型：期刊文献

英文题名：Efficient lithium recovery and valorization from high-sodium industrial wastewater

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

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

年份：2026

卷号：547

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20263321321649);Scopus(收录号：2-s2.0-105047336997);WOS:【SCI-EXPANDED(收录号:WOS:001854524100001)】；

基金：This work sponsored by the National Natural Science Foundation of China (92475114, 22508122, 92475207) .

语种：英文

外文关键词：Sn-doped Li/Al-LDHs; Granulation; Industrial wastewater; lithium recovery; Selective separation

摘要：In view of the sharp surge in lithium demand from the new energy industry, making efficient lithium recycling from secondary waste streams is increasingly essential. Herein, a novel granular aluminum-based layered double hydroxide adsorbent (DW-LDHs) was fabricated using Sn-doped Li/Al-LDHs powder for selective lithium recovery from high-sodium low-grade industrial wastewater. DW-LDHs outperforms conventional extruded granules (C-LDHs), reaching equilibrium in 30 min with 3.41-fold higher capacity, enabled by the small granule size, well-developed pore structure that eliminates diffusion constraints, and Sn doping that promotes uptake in low-Li+ environment. Fixed-bed cycling experiments confirmed its stable lithium recovery efficiency of over 95% and a saturated capacity of 9.78 mg/g in complex wastewater with 30.4 mg/L Li+. Benefiting from remarkable anti-interference ability toward coexisting Na+, DW-LDHs produced high-purity eluent with a low Na/Li mass ratio of 0.40. Material-balance estimation indicated a theoretical yield of 145.70 g Li2CO3 per m3 of wastewater, valued at $3.63, demonstrating its laboratory-scale potential for lithium recovery from high-sodium industrial wastewater.