Comparative Evaluation of Physical and Chemical Beneficiation Routes for Rare Earth Element Recovery from Coal Bottom Ash: A Case Study from Soma Power Plant, Türkiye

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dc.authorid0000-0002-8076-5120
dc.authorid0009-0004-0468-1592
dc.authorid0000-0002-0676-3805
dc.authorid0000-0001-7051-0063
dc.contributor.authorULUCAN Tülin
dc.contributor.authorGÜVEN, Gülşah
dc.contributor.authorDİNÇ, N. İlkyaz
dc.contributor.authorPURAL, Y. Enes
dc.contributor.authorYÜCE, A. Ekrem
dc.contributor.authorSOYDAŞ SÖZER, Belma
dc.contributor.authorBURAT, Fırat
dc.date.accessioned2026-01-26T09:31:26Z
dc.date.available2026-01-26T09:31:26Z
dc.date.issued2026-01-14
dc.departmentTENMAK-Nadir Toprak Elementleri Araştırma Enstitüsü
dc.description.abstractThe recovery of rare earth elements (REEs) from coal combustion by-products has attracted increasing attention due to their strategic importance and supply constraints. This study evaluates the recovery potential of REEs from bottom ash (BA) produced by the Soma Thermal Power Plant through an integrated physical–chemical beneficiation route. Characterization indicated that REEs are mainly hosted in aluminosilicate glass and mullite phases, showing limited liberation. Physical separation methods, including jigging, shaking table, centrifugal (MGS and Knelson), and magnetic separation, achieved only minor enrichment because of the low density and encapsulation of REE-bearing phases. To overcome these limitations, sequential alkaline and acid leaching were employed. Alkaline pretreatment using 5 mol/L NaOH at 90 °C for 4 h partially decomposed the matrix and improved REE accessibility. Subsequent HCl leaching (5 mol/L, 90 °C, 3 h) resulted in the highest ΣREE recovery (>80%) for the −0.106 mm fraction, while 4 mol/L HCl and −0.3 mm conditions provided a more selective and stable extraction. The combined alkaline–acid leaching process demonstrated a synergistic enhancement in REE mobilization. Overall, sequential chemical leaching offers an effective and scalable approach for REE recovery from coal combustion residues, supporting resource efficiency and waste valorization.
dc.identifier.urihttps://kurumsalarsiv.tenmak.gov.tr/handle/20.500.12878/2086
dc.institutionauthorSOYDAŞ SÖZER, Belma
dc.language.isoen
dc.publisherTurkish Energy, Nuclear and Mineral Research Agency (TENMAK), Ankara, Türkiye
dc.relation.publicationcategoryDiğer
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectRare earth elements (REEs)
dc.subjectCoal bottom ash
dc.subjectPhysical beneficiation
dc.subjectAlkaline pretreatment
dc.subjectSequential chemical leaching
dc.subjectHydrometallurgical processing
dc.subjectWaste valorization
dc.subjectSoma thermal power plant (Türkiye)
dc.titleComparative Evaluation of Physical and Chemical Beneficiation Routes for Rare Earth Element Recovery from Coal Bottom Ash: A Case Study from Soma Power Plant, Türkiye
dc.typearticle
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