Li-Mn-O Yapılı Lityum İyon Eleklerinin Sentezinde Öğütme Süresinin ve KCl İlavesinin Etkisinin Araştırılması

Öz

Teknolojik açıdan kritik öneme sahip lityumun yer kabuğunda geniş bir alana yayılmamış olması, farklı lityum kaynaklarının araştırılmasının önünü açmıştır. Lityum geri kazanımı için yapılan uygulamalardan biri de adsorpsiyon yöntemidir. Çözelti ortamındaki lityum iyonlarını almak için etkili adsorban özelliklerine sahip lityum-iyon elekleri sentezlenmeye başlanmıştır. Yüksek lityum seçicilikleri nedeniyle lityum mangan oksit iyon elekleri, lityum kaynaklarından lityum geri kazanımı için en umut verici iyon elekleridir. Bu çalışmada başlangıç malzemesi olarak KMnO4 ve MnCl2 stokiyometrik olarak tercih edilmiştir. Ayrıca farklı kütle oranlarında (%0, %5, %10 ve %20) KCl eklenmiştir. Öğütme süresi sırasıyla 1, 2, 3 ve 4 saattir. Daha sonra kalsinasyon ve lityum emdirme işlemlerinden sonra asit ile aktive edilen lityum mangan oksit eleklerin lityum adsorpsiyon kapasiteleri araştırılmıştır. AAS ile yapılan ölçümler sonucunda çözeltide en az mangan iyonunun tespit edildiği koşullar %20 KCl ilaveli ve 2 saat öğütme süreli iyon elek numunesi olmuştur. Bu koşullar altında sentezlenen iyon eleğin lityum adsorpsiyon veriminin %50,74 civarında olduğu tespit edilmiştir.

Anahtar Kelimeler

• Lityum iyon elekler
• Lityum geri kazanımı
• Adsorpsiyon
• Lityum mangan oksitler

Destekleyen Kurum

TÜBİTAK

Proje Numarası

TÜBİTAK 2218 Doktora Sonrası Araştırma Burs Programına (Proje No: 122C113)

Etik Beyan

Bu makalenin yazarları çalışmalarında kullandıkları materyal ve yöntemlerin etik kurul izni ve/veya yasal özel bir izin gerektirmediğini beyan ederler.

Teşekkür

Tüm yazarlar TÜBİTAK 2218 Doktora Sonrası Araştırma Burs Programına (Proje No: 122C113) finansal destekleri için teşekkür eder. Ayrıca Türkiye Enerji, Nükleer ve Maden Araştırma Enstitüsü (TENMAK)/Bor Araştırma Enstitüsü'ne (BOREN) altyapı tesislerinin kullanımına ilişkin destekleri için teşekkür ederler.

Investigation of the Effect of Grinding Time and KCl Addition on the Synthesis of Li-Mn-O Structured Lithium Ion Sieves

Öz

Technologically critical lithium has not spread over a wide area in the earth's crust, which paved the way for investigating different lithium sources. One of the applications for lithium recovery is the adsorption method. Lithium-ion sieves with effective adsorbent properties have begun to be synthesized to take lithium ions in the solution medium. Due to their high lithium selectivity, lithium manganese oxide ion sieves are the most promising ion sieves for the recovery of lithium from lithium sources. In this study, KMnO4 and MnCl2 were preferred as starting materials stoichiometrically. In addition, KCl was added at different mass ratios (0%, 5%, 10% and 20%). Grinding time is 1, 2, 3, and 4 hours, respectively. Then, the lithium adsorption capacities of lithium manganese oxide sieves activated with acid after calcination and lithium impregnation processes were investigated. As a result of the measurements made with AAS, the conditions in which the least manganese ions were detected in the solution were the ion sieve sample with 20% KCl addition and 2 hours of grinding time. It was determined that the lithium adsorption efficiency of the ion sieve synthesized under these conditions was around 50.74%.

Anahtar Kelimeler

• Lithium ion sieves
• Lithium recovery
• Adsoprtion
• Lithium manganese oxides

Proje Numarası

TÜBİTAK 2218 Doktora Sonrası Araştırma Burs Programına (Proje No: 122C113)

Kaynakça

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