A Review On Various Analytical Techniques For Determining REEs

Abstract

Due to the transition from traditional energy sources to clean energy in recent years, it is stated that there will be a continuous increase in the need for REEs worldwide in the coming years owing to their especial physical and chemical properties. The principal sources of REEs are the minerals bastnazite, monazite, and xenotime, etc.. Rare earths have peculiar, unique properties and become essential in many high-tech applications. Therefore, the REEs is used for applications such as improvement of industrial. It is worth highlighting that the separation of rare earth can be both complex and challenging owing to similar properties which are shared to produce high quality and better quantity of REEs. In industrial production, complex ores containing rare earth elements are concentrated by physical ore beneficiation processes. For this, the processes proposed in this work possesses aguide on green chemistry, solvent extraction, membran filtration, adsorption of recovering REEs through stepwise extraction and enrichment technique. This review, attempts to provide notable information on the separation and purification efforts to date for the recovery of REEs.

Keywords

• Rare-earth elements
• adsorption
• green chemistry
• extraction

REE'lerin Belirlenmesine Yönelik Çeşitli Analitik Teknikler Üzerine Bir Derleme

Abstract

Son yıllarda geleneksel enerji kaynaklarından temiz enerjiye geçiş nedeniyle, özellikle fiziksel ve kimyasal özelliklerinden dolayı NTE'lere olan ihtiyacın dünya genelinde önümüzdeki yıllarda sürekli bir artış olacağı belirtilmektedir. Nadir toprak elementlerinin temel kaynakları, bastnazit, monazit ve ksenotim vb. mineralleridir. Nadir toprak elementleri (NTE) kendine özgü, benzersiz özelliklere sahiptir ve birçok yüksek teknoloji uygulamasında gerekli hale gelmektedir. Bu nedenle, NTE'ler endüstriyel iyileştirme gibi uygulamalar için kullanılmaktadır. Endüstriyel üretimde, nadir toprak elementi içeren kompleks cevherler fiziksel cevher zenginleştirme prosesleriyle deriştirirler. Yüksek kalitede ve daha iyi miktarda REE üretmek için paylaşılan benzer özellikler nedeniyle nadir toprak ayrıştırmasının hem karmaşık hem de zor olabileceğini vurgulamakta fayda var. Bunun için, bu çalışmada önerilen süreçler, yeşil kimya, çözücü ekstraksiyonu, membran filtrasyonu, ardışık ekstraksiyon ve zenginleştirme, adsorpsiyon tekniği yoluyla NTE'nin geri kazanımı üzerine bir kılavuza sahiptir. Bu derleme, NTE'lerin geri kazanımı için şimdiye kadar yapılan ayırma ve saflaştırma çalışmaları hakkında dikkate değer bilgi sağlamaya çalışmaktadır.

Keywords

• Nadir toprak elementleri
• adsorpsiyon
• yeşil kimya
• ekstraksiyon

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