文献类型：期刊文献

英文题名：Bridging microextraction and fiber coalescence for rare-earth enrichment

作者：Liu, Hengyuan[1,2];Cao, Zhongning[1];Zhang, Ye[3];Gu, Siwei[1];Yan, Tian[1];Liu, Yingzhe[4];Liu, Yiqian[1];Yang, Qiang[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore;[3]Tsinghua Univ, Bldg Energy Res Ctr, Sch Architecture, Beijing 100084, Peoples R China;[4]Xiamen Univ Technol, Sch Mech & Automot Engn, Xiamen 361024, Peoples R China

年份：2026

卷号：575

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20263421340829);Scopus(收录号：2-s2.0-105047781936);WOS:【SCI-EXPANDED(收录号:WOS:001856927600001)】；

基金：H.Y. Liu and Z.N. Cao contributed equally to this work. This work was supported by the Fundamental and Interdisciplinary Disciplines Breakthrough Plan of the Ministry of Education of China (Grant No. JYB2025XDXM908) , the National Natural Science Foundation of China (Grant Nos. 52025103, 52300086) and the Xplorer Prize (XPLORER-2022-1034) .

语种：英文

外文关键词：Rare-earth enrichment; Solvent extraction; Microextraction; Fiber-induced phase separation; High aqueous-to-organic ratio

摘要：Efficient enrichment of rare-earth ions from dilute aqueous solutions remains challenging for conventional solvent extraction, as high aqueous-to-organic ratios limit interfacial mass transfer and slow phase disengagement. Herein, we report an integrated microextraction and fiber-induced phase separation (MEFS) system for continuous-flow rare-earth enrichment. Microscale biphasic dispersion in the micromixer and tubular extractor accelerates interfacial mass transfer, while the downstream fiber separator promotes droplet coalescence and phase disengagement, enabling stable recirculation of a low-volume organic phase. Using Nd3+ as a model ion, the MEFS system achieved a 16.7-fold increase in the apparent extraction rate constant compared with batch extraction while enabling rapid phase disengagement within seconds. At an aqueous-to-organic volume ratio of 100:1, the system delivered an average Nd3+ extraction efficiency of approximately 95% from a 100 ppm feed and enriched the circulating organic phase to 18.9 g/L. Its applicability was further demonstrated across different mixer configurations, acidic organophosphorus extractants, and representative light and heavy rare-earth ions. These results suggest that coupling microextraction with fiber-induced phase separation provides an effective continuous-flow strategy for rare-earth enrichment under high-ratio solvent extraction conditions.