FUTURE PROSPECTS OF RARE EARTH ELEMENTS IN COAL AND COAL ASH: BASED ON MAPPING OF GLOBAL RESEARCH (1973-2023)

Öz

As industrial activities continue to expand, there is a growing demand for Rare Earth Elements (REEs). However, REE resources are rapidly depleting, leading to a search for alternative sources. Notably, REEs are found in significant quantities in coal, a fossil fuel with substantial global reserves and active extraction operations. Some countries, particularly China, extract REEs from coal, indicating its potential as an alternative REE source soon. The increasing number of academic research studies on this topic further underscores its importance. This study aims to analyze global academic research on REEs in coal and coal ash from 1973 to 2023 using bibliometric analysis to identify future trends. Data from the WoS database was utilized to ensure objective and comprehensive results. The research encompassed various aspects such as document type, country of origin, co-authors, institutions, citations, keywords, journals, and WoS categories. The findings suggest that coal could emerge as a significant REE source with sustainable and environmentally conscious practices, potentially forming a widespread business network.

Anahtar Kelimeler

• Coal
• Rare Earth Elements
• REEs
• Bibliometric Analysis

KÖMÜR VE KÖMÜR KÜLÜNDEKİ NADİR TOPRAK ELEMENTLERİNİN KÜRESEL ARAŞTIRMALARIN HARİTALANMASINA DAYALI GELECEK GÖRÜNÜMÜ (1973-2023)

Öz

Gelişen endüstriyel faaliyetler ile NTE’lere (Nadir Toprak Element) olan ihtiyaç da aynı oranda artmaktadır. NTE kaynakları hızla tükenmekte ve alternatif kaynak arayışları ortaya çıkmaktadır. Global çapta büyük rezerve sahip ve aktif olarak işletilmekte olan fosil kökenli yakıt kaynaklarından biri olan kömürde de NTE’ler azımsanmayacak oranda bulunmaktadır. Çin başta olmak üzere bazı ülkeler kömürden NTE üretimi yapmaktadır. Kömürün önümüzdeki yıllarda önemli bir alternatif NTE kaynağı olması muhtemeldir. Konu ile ilgili çok sayıda akademik araştırma yapılıyor olması da bunun bir göstergesidir. Bu çalışma 1973-2023 yılları arasında kömür ve kömür külündeki NTE’ler ile ilgili global çapta yapılan akademik araştırmaların bibliyometrik analiz ile irdelenmesi, gelecek beklentilerin saptanması amacıyla yapılmıştır. Çalışmada objektif ve kapsamlı sonuçların elde edilebilmesi adına WoS veri tabanından çekilen veriler kullanılmıştır. Yapılan araştırmalar doküman türü, ülke, ortak yazar, enstitü, atıf, anahtar kelimeler, dergi, WoS kategorisi gibi çok yönlü olarak incelenmiştir. Kömürün sürdürülebilir ve çevresel yaklaşımlarla NTE kaynağı olarak yaygın bir işletme ağına sahip olması muhtemeldir.

Anahtar Kelimeler

• Kömür
• Nadir Toprak Elementleri
• NTE
• Bibliometrik Analiz

Kaynakça

1. Alvin, M.A., Granite, E., Miller, C., 2017. The Future of Rare Earth Elements May Lie with Coal. American Coal Council, America.
2. Balaram, V., 2023. Advances in Analytical Techniques and Applications in Exploration, Mining, Extraction, and Metallurgical Studies of Rare Earth Elements. Minerals, 13, 1031. https://doi.org/10.3390/min13081031
3. Bullock, L.A., Parnell, J., Perez, M., Armstrong, J.G., Feldmann, J., Boyce, A.J., 2018. High selenium in the Carboniferous coal measures of Northumberland, North East England. International Journal of Coal Geology, 195, 61–74.
4. Dai, S., Finkelman, R.B., 2018. Coal as a promising source of critical elements: progress and future prospects. International Journal of Coal Geology, 186, 155–164.
5. Dai, S., Ren, D., Chou, C.L., Finkelman, R.B., Seredin, V.V., Zhou, Y., 2012. Geochemistry of trace elements in Chinese coals: a review of abundances, genetic types, impacts on human health, and industrial utilization. International Journal of Coal Geology, 94, 3-21.
6. Finkelman, R.B., 2004. Potential health impacts of burning coal beds and waste banks. International Journal of Coal Geology, 59, 19-24.
7. Finkelman, R.B., Dai, S., French, D., 2019. The importance of minerals in coal as the hosts of chemical elements. International Journal of Coal Geology, 212, 103251.
8. Franus, W., Wiatros-Motyka, M.M., Wdowin, M., 2015. Coal fly ash as a resource for rare earth elements. Environmental Science and Pollution Research, 22, 9464-9474.

9. Global Power Plant, 2024. Available online: https://www.globalfirepower.com (accessed on 16 January 2024).
10. Gollakota, A.R.K., Volli, V., Shu, C.M., 2019. Progressive utilization prospects of coal fly ash: A review. Science of the Total Environment, 672, 951-989.
11. Hower, J.C., Ruppert, L.F., Eble, C.F., 1999. Lanthanide, yttrium, and zirconium anomalies in the Fire Clay coal bed, Eastern Kentucky. International Journal of Coal Geology, 39, 141-153. https://doi.org/10.1016/S0166-5162(98)00043-3
12. Karadirek, S., 2023. Mineralogy and geochemistry of coal-bearing Tunçbilek Formation in the Tunçbilek-Tavşanlı coalfıeld (Kütahya, W-Turkey). Journal of Scientific Reports-A, 52, 65–98. https://doi.org/10.59313/jsr-a.1192487
13. Ober, J.A., 2017. Mineral commodity summaries 2017: U.S. Geological Survey, 202 p. https://doi.org/10.3133/70180197
14. Peng, B., Guo, D., Oiao, H., Yang, Q., Zhang, B., Hayat, T., Alsaedi, A., Ahmad, B., 2018. Bibliometric and visualized analysis of China's coal research 2000-2015. Journal of Cleaner Production, 197, 1177-1189.
15. Şahiner, M., Akkök, Y.Z., Arslan, M., Ergin, M.H., 2017. Rare Earth Elements in the World and Türkiye. Mineral Research and Exploration Series-5, Ankara, Türkiye.
16. Steckel, J.C., Edenhofer, O., Jakob, M., 2015. Drivers for the renaissance of coal. Proceedings of the National Academy of Sciences, 112, E3775-E3781.
17. van Eck, N.J., Waltman, L., 2010. Software survey: VOSviewer, a computer program for bibliometric mapping. Scientometrics, 84, 523–538. https://doi.org/10.1007/s11192-009-0146-3
18. Yalcin Erik, N., 2022. A non-traditional resource for critical minerals: Rare Earths +Y(REY), and Sc contents of some Turkish low-rank coals. KSU J Eng Sci, 25(2), 155-172. https://doi.org/10.17780/ksujes.954292
19. Yang, L., Wang, Q., Bai, X., Deng, J., Hu, Y., 2018. Mapping of Trace Elements in Coal and Ash Research Based on a Bibliometric Analysis Method Spanning 1971–2017. Minerals, 89, 1-18.
20. Yuan, J., Chen, C., Yang, W., Liu, m., Xia, J., Liu, S., 2021. A survey of visual analytics techniques for machine learning. Computational Visual Media, 7, 3–36. https://doi.org/10.1007/s41095-020-0191-7
21. Zhao, L., Ward, C.R., French, D., Graham, I.T., Dai, S., Yang, C., Xie, P., Zhang, S., 2018. Origin of a kaolinite-NH4-illite-pyrophyllitechlorite assemblage in a marine-influenced anthracite and associated strata from the Jincheng Coalfield, Qinshui Basin, Northern China. International Journal of Coal Geology, 185, 61–78.