Revisiting sustainable resources in the combustion products of alumina-rich coal: Critical metal (Li, Ga, Nb, and REY) potential of ash from the Togtoh Power Plant, Inner Mongolia, China
文献类型：期刊论文
| 作者 | Zheng, Yanmin4; Zhao, Lei4; French, David3; Graham, Ian3; Wei, Qiang2; Dai, Shifeng4; Feng, Lili1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2024-11-10 |
| 卷号 | 950页码:12 |
| 关键词 | Alumina-rich fly ash Critical metals Modes of occurrence Lithium Gallium Niobium |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2024.175056 |
| 产权排序 | 3 |
| 英文摘要 | Coal fly ash has gained much attention as a potential alternative source for extracting critical metals such as Li, Ga, Nb, and lanthanides and yttrium (REY). This study investigates their distribution characteristics and modes of occurrence in alumina-rich fly ashes from the Togtoh Power Plant in Inner Mongolia, using various analytical methods. The objective was to provide a reference for the pre-enrichment of critical metals in fly ash. Lithium is primarily present in the glass phase, and its concentration is extremely low in the crystalline phases. Lithium is mainly concentrated in "pure" aluminosilicate glass, and is present but at a low level in Ca-rich aluminosilicate glass. Gallium is primarily present in the glass phase and in corundum, while Nb mainly exists in submicron zircon particles surrounded by Si-Al-Ca glass. Lanthanides and yttrium primarily occur in the glass phase and in crystalline phases, including an intermediate phase composed of the three end-member minerals of the gorceixite-crandallite-florencite series, as well as in monazite, crystalline forms of iron oxides and REY oxides. The Li concentrations in the alumina-rich fly ashes range from 562 to 894 mu g/g for Li2O, from 43.9 to 81.9 mu g/g for Ga, from 58.7 to 70.6 mu g/g for Nb2O5, and from 258 to 450 mu g/g for REY oxides, respectively, indicating their substantial potential for resource recovery. Especially, the 2nd row fly ash has the highest contents of these metals, allowing for direct extraction without the necessity for complex pre-processing. Physical separation can further enrich Li, Ga, Nb, and REY in the fly ash. In particular, particle size separation enriches these elements in the < 20 mu m size range and magnetic separation enriches Li, Ga, Nb, and REY (except Ce) in the non-magnetic fraction. However, Ce is significantly enriched in the magnetic fraction compared to the original fly ash. |
| WOS关键词 | RARE-EARTH-ELEMENTS ; FLY-ASH ; CHEMICAL-COMPOSITION ; MULTICOMPONENT UTILIZATION ; BOTTOM ASH ; MINERALOGY ; GEOCHEMISTRY ; EXTRACTION ; COALFIELD ; BEHAVIOR |
| 资助项目 | National Key Research & Development Program of China[2021YFC2902601] ; National Natural Science Foundation of China[42372186] ; National Natural Science Foundation of China[42022015] ; Fundamental Research Funds for the Central Uni-versities[2023YQTD01] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001296423500001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research & Development Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Uni-versities |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/209030]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhao, Lei |
| 作者单位 | 1.China Univ Min & Technol Beijing, Sch Chem & Environm Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Univ New South Wales, Earth & Sustainabil Sci Res Ctr, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia 4.China Univ Min & Technol Beijing, Coll Geosci & Survey Engn, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yanmin,Zhao, Lei,French, David,et al. Revisiting sustainable resources in the combustion products of alumina-rich coal: Critical metal (Li, Ga, Nb, and REY) potential of ash from the Togtoh Power Plant, Inner Mongolia, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,950:12. |
| APA | Zheng, Yanmin.,Zhao, Lei.,French, David.,Graham, Ian.,Wei, Qiang.,...&Feng, Lili.(2024).Revisiting sustainable resources in the combustion products of alumina-rich coal: Critical metal (Li, Ga, Nb, and REY) potential of ash from the Togtoh Power Plant, Inner Mongolia, China.SCIENCE OF THE TOTAL ENVIRONMENT,950,12. |
| MLA | Zheng, Yanmin,et al."Revisiting sustainable resources in the combustion products of alumina-rich coal: Critical metal (Li, Ga, Nb, and REY) potential of ash from the Togtoh Power Plant, Inner Mongolia, China".SCIENCE OF THE TOTAL ENVIRONMENT 950(2024):12. |
入库方式： OAI收割
来源：地理科学与资源研究所
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