成果归属机构：

材料科学与工程学院

作者：

Luo, Shaojun ; Wang, Yuehai ; Zhang, Qing ; He, Mingming ; Wang, Haijuan ; He, Xuwen ; Zheng, Xiaohong ; Sun, Zhi

单位：

China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China;Chinese Acad Sci, Inst Proc Engn, Natl Engn Res Ctr Green Recycling Strateg Met Reso, Beijing 100190, Peoples R China;Chinese Acad Sci, Chem & Chem Engn Data Ctr, Beijing 100864, Peoples R China;China Univ Geosci Beijing, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China;Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

关键词：

EXTRACTION; ACTIVATION; NMR

摘要：

With the surging global demand for lithium, the utilization of complex or low-grade lithium-bearing resources has attracted significant attention worldwide. However, conventional methods encounter considerable limitations when processing low-grade lithium-bearing clay resource or residue, which typically contains less than 0.5 wt% lithium. These challenges include high chemical and energy consumption, as well as substantial environmental burdens resulting from leaching residues and wastewater discharge. In this research, we propose a nearto-zero waste lithium extraction strategy that achieves an efficiency of 91.52 %, while the leaching efficiencies of Fe and Al remain below 1 %. By introducing proper mechanical treatment, lithium ions in the crystals can be selectively converted into soluble lithium bicarbonate via CO2 under mild conditions (at 120 degrees C, 1.5 MPa), thereby eliminating the need for acids. The acid-free residue retains the original properties of the mineral and can be upgraded to a high-capacity zeolite adsorbent, with an adsorption capacity for heavy metals reaching 509 mg/g. This work offers fundamental insights on the mechanistic pathway and process design for lithium recovery from low-grade lithium-bearing resources and presents a viable and environmentally benign alternative to conventional processing routes.

基金：

Strategic Priority Research Program of Chinese Academy of Sciences [XDA0430105]; National Natural Science Foundation of China [52525408]; Chinese Academy of Sciences, Construction of Scientific Data Center System [WX145XQ07-12]

语种：

英文

DOI：

10.1016/j.seppur.2025.135432

来源：

SEPARATION AND PURIFICATION TECHNOLOGY,2026():.

出版日期：

2026-02-07

提交日期：

2025-11-15

引用参考：

Luo, Shaojun; Wang, Yuehai; Zhang, Qing; He, Mingming; Wang, Haijuan; He, Xuwen; Zheng, Xiaohong; Sun, Zhi. A 'zero waste' solution for effective recovery of lithium from low-grade lithium-bearing resources[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2026():.