دورية أكاديمية
Rare Earth Element Speciation in Coal and Coal Combustion Byproducts: A XANES and EXAFS Study.
| العنوان: | Rare Earth Element Speciation in Coal and Coal Combustion Byproducts: A XANES and EXAFS Study. |
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| المؤلفون: | Bishop BA; Department of Earth Sciences, University of Regina. 3737 Wascana Parkway, Regina S4S 0A2, Saskatchewan, Canada., Ramachandran Shivakumar K; Department of Earth and Atmospheric Sciences, University of Alberta. 1-26 Earth Sciences Building, Edmonton T6G 2E3, Alberta, Canada., Schmidt J; Department of Earth Sciences, University of Regina. 3737 Wascana Parkway, Regina S4S 0A2, Saskatchewan, Canada., Chen N; Canadian Light Source Inc., University of Saskatchewan, 114 Science Place, Saskatoon S7N 2V3, Saskatchewan, Canada., Alessi DS; Department of Earth and Atmospheric Sciences, University of Alberta. 1-26 Earth Sciences Building, Edmonton T6G 2E3, Alberta, Canada., Robbins LJ; Department of Earth Sciences, University of Regina. 3737 Wascana Parkway, Regina S4S 0A2, Saskatchewan, Canada. |
| المصدر: | Environmental science & technology [Environ Sci Technol] 2024 Aug 13; Vol. 58 (32), pp. 14565-14574. Date of Electronic Publication: 2024 Jul 30. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: American Chemical Society Country of Publication: United States NLM ID: 0213155 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1520-5851 (Electronic) Linking ISSN: 0013936X NLM ISO Abbreviation: Environ Sci Technol Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: Washington DC : American Chemical Society Original Publication: Easton, Pa. : American Chemical Society, c1967- |
| مواضيع طبية MeSH: | Coal* , X-Ray Absorption Spectroscopy* , Metals, Rare Earth*/chemistry |
| مستخلص: | Transitioning to a low-carbon economy, necessary to mitigate the impacts of anthropogenic climate change, will lead to a significant increase in demand for critical minerals such as rare earth elements (REE). Meeting these raw materials requirements will be challenging, so there is increasing interest in new sources of REE including coal combustion byproducts (CCBs). Extraction of REE from CCBs can be advantageous as it involves reusing a waste product, thereby contributing to the circular economy. While a growing body of literature reports on the abundance of REE in CCBs globally, studies examining the key factors which control their recovery, including speciation and mode of occurrence, are lacking. This study employed synchrotron-based X-ray absorption spectroscopy to probe the speciation and local bonding environment of yttrium in coals and their associated CCBs. Linear Combination Fitting identified silicate and phosphate minerals as the dominant REE-bearing phases. Taken together with the results of extended X-ray absorption fine structure (EXAFS) curve fitting, we find there is minimal transformation in the REE host phase during combustion, indicating it is transferred in bulk from the coals to the CCBs. Accordingly, these findings can be incorporated into the development of an efficient, environmentally conscious recovery process. |
| فهرسة مساهمة: | Keywords: EXAFS; circular economy; coal fly ash; energy transition; rare earth elements |
| المشرفين على المادة: | 0 (Coal) 0 (Metals, Rare Earth) |
| تواريخ الأحداث: | Date Created: 20240730 Date Completed: 20240813 Latest Revision: 20240813 |
| رمز التحديث: | 20240813 |
| DOI: | 10.1021/acs.est.4c04256 |
| PMID: | 39077826 |
| قاعدة البيانات: | MEDLINE |
Find this issue from the American Chemical Society | تدمد: | 1520-5851 |
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| DOI: | 10.1021/acs.est.4c04256 |