文献类型：期刊文献

英文题名：Echelon extraction of valuable components from salt lake brine substrate

作者：Tang, Xiangting[1];Chen, Jun[1];Zhang, Ye[1,2];Yu, Jianguo[1];Lin, Sen[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430070, Peoples R China

年份：2025

卷号：594

外文期刊名：DESALINATION

收录：;EI(收录号：20244717385562);WOS:【SCI-EXPANDED(收录号:WOS:001360313300001)】；

语种：英文

外文关键词：Lithium; Salt lake; Valuable element; Leaching; Salt field substrate

摘要：Salt fields are indispensable for the salt lake industry, yet their substrates, which are rich in valuable resources accumulated over time by the formation of solid solution enrichment, always stand at a neglected position. In this study, the distribution and occurrence state of elements in the Mahai Salt Lake substrate were comprehensively investigated by multiple characterizations. The substrate was primarily found to consist of calciumsilica-aluminum minerals, with significant concentrations of lithium (0.0053 %), strontium (0.1130 %), and rubidium (0.0266 %) adsorbed onto these mineralized phases. Besides, an echelon extraction was developed to exploit these valuable resources including hydrochloric acid leaching and segmented calcination-leaching coupled process. It was confirmed that over 95 % of rubidium and 93 % of strontium could be effectively extracted via hydrochloric acid leaching through cation exchange mechanisms. 80 % lithium was extracted by calcination-leaching coupled process with three cycles to conquer the interlayer structure of mineralized lithium, facilitating the occupation of Li+ lattice sites by H+.