Türkiye'deki Uçucu Küllerden Nadir Toprak Elementlerinin (NTE) Zenginleştirilmesi için Karakterizasyonu

Öz

Teknolojinin hızla gelişmesi, nadir toprak elementlerine (NTE) olan talebi her geçen gün artırmaktadır. Stratejik öneme sahip bu metaller, ülkelerin ihtiyaçlarını karşılamak için birincil kaynaklardan temin edilmekte, bu kaynaklar yetersiz kaldığında ise ikincil kaynaklar araştırılmaktadır. Üretim sonrası ortaya çıkan atık ürünleri önemli sorunlara yol açsa da kömür yakıtlı termik santral uçucu külü içerdiği yüksek miktarda NTE nedeniyle ikincil kaynak olarak değerlendirilebilir. Bu çalışmada, Türkiye'deki termik santrallerden çıkan altı uçucu külün karakterizasyon analizleri gerçekleştirilmiş ve tespit edilen NTE'lerin zenginleştirme olasılıkları araştırılmıştır. Uçucu küller, atomik absorpsiyon spektrofotometresi (AAS), indüktif eşleşmiş plazma kütle spektrometrisi (ICP-MS), X-ışını floresansı (XRF) ve X-ışını kırınımı (XRD) yöntemleri kullanılarak analiz edilmiştir. Seçilen iki uçucu külde NTE'lerin zenginleştirme potansiyeli incelenmiştir. Toplam NTE değerlerinin 168.9 ve 244.9 ppm olduğu tespit edilmiştir. Elde edilen sonuçlar, uçucu küllerin ikincil NTE kaynağı olarak kullanılabilirliğini ortaya koymaktadır. Ayrıca, biyoliç yönteminin uçucu küllerden NTE zenginleştirilmesinde uygulanmasının ekonomik ve çevre dostu bir alternatif sunacağı düşünülmektedir. Bu bağlamda, Türkiye'den elde edilen uçucu külün, NTE’nin geri kazanımı için önemli bir potansiyele sahip olduğu ve bu yöntemin, mevcut kaynakların sürdürülebilir kullanımına katkı sağlayacağı sonucuna varılmıştır. Bu çalışma, geçmişte yapılan çalışmalarla da karşılaştırılarak elde edilen bulguların doğruluğunu pekiştirmektedir.

Anahtar Kelimeler

• Uçucu kül
• nadir toprak elementi
• cevher zenginleştirme
• atık yönetimi
• biyomadencilik

Destekleyen Kurum

Çukurova Üniversitesi

Proje Numarası

FDK-2019-12004

Fly Ash Characterisation for Rare Earth Elements (REEs) Beneficiation in Türkiye

Öz

The rapid advancement of technology is continuously increasing the need for rare earth elements (REEs). These strategically important metals are mainly sourced from primary resources, and then secondary resources are explored. Despite the significant issues caused by post products, fly ash from coal-fired power plants can be considered a secondary source due to its high REE content. This study conducted characterization analyses of six fly ash samples from power plants in Türkiye and investigated the potential for REE enrichment. The fly ashes were analysed using atomic absorption spectrophotometry (AAS), inductively coupled plasma mass spectrometry (ICP-MS), X-ray fluorescence (XRF), and X-ray diffraction (XRD) methods. The enrichment potential of REEs in two selected fly ashes was examined. Total REE values were found to be 168.9 and 244.9 ppm. The results indicate that fly ashes can be utilized as a secondary source of REEs. Moreover, the application of bioleaching for the enrichment of REEs from fly ash is considered both an economically viable and environmentally friendly alternative. In this context, fly ash from Türkiye is concluded to have significant potential for REE recovery, and this method can contribute to the sustainable use of existing resources. This study also validates its findings by comparing them with literature.

Anahtar Kelimeler

• Coal fly ash
• rare earth elements
• mineral processing
• waste management
• biomining

Destekleyen Kurum

Çukurova University

Proje Numarası

FDK-2019-12004

Teşekkür

This study was derived from a PhD thesis project supported by Çukurova University's Scientific Research Coordination Office under project number FDK-2019-12004. We would like to express our gratitude to the General Directorate of TKI Institution and the operating authorities for their support in our studies.

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