İbrahim DOLAK

Toryum(IV) Baskılı Kriyojel Polimer Kullanılarak Bastnaesit Cevherindeki Toryum(IV)’un Seçici Olarak Ayrılması ve Önderiştirilmesi

Bu çalışmada, Th(IV)-baskılı Polimerler kullanılarak çeşitli lantanid iyonlarının varlığında sulu çözeltilerde ve bastnaesit cevherinde Th(IV) iyonunun seçici olarak ayrılması ve önderiştirilmesi gerçekleştirildi. Bu amaçla, Th(IV), N-metakriloil antipirin (MAAP) ile kompleksleştirildi ve hazırlanan (MAAP)2-Th(IV) kompleks monomer, serbest radikal polimerizasyon yöntemiyle 2-hidroksietil metakrilat (HEMA) kriyojel ile etkileştirilerek pHEMA-(MAAP)2-Th(IV) kriyojel polimeri hazırlandı. Th(IV), 5.0 mol.L-1 HNO3 ile desorbe edildi ve böylece Th(IV) baskılı p-HEMA-(MAAP)2 kriyojel polimeri oluşturuldu. Th(IV) iyonunun Th(IV)-baskılı p-HEMA-(MAAP)2 kriyojel polimere seçici olarak bağlanması işleminde optimum koşulları belirlemek için pH, akış hızı, başlangıç Th(IV) konsantrasyonu gibi bazı parametreler araştırıldı. Belirlenen bu optimum koşullar altında, maksimum bağlanma kapasitesi 48.30 mg.g-1 olarak tespit edildi. Seçicilik çalışmaları da, Th(IV)-baskılı p-HEMA-(MAAP)2 kriyojel polimer kullanılarak Ce(III), La(III) and Eu(III) iyonlarının varlığında gerçekleştirildi. p-HEMA-(MAAP)2 kriyojel polimer, Th(IV) iyonuna karşı yüksek seçicilik gösterdiği bulundu.

Selective Separation and Preconcentration of Thorium(IV) in Bastnaesite Ore Using Thorium(IV)-Imprinted Cryogel Polymer

In this study, selective separation and preconcentration of Th(IV) in aqueous solutions and bastnaesite ore in the presence various lanthanide ions by using Th(IV)-imprinted polymer was conducted. For this purpose, Th(IV) was complexed with N-methacryloyl antipyrine (MAAP) and the prepared (MAAP)2-Th(IV) complex monomer was polymerized with 2-hydroxyethyl methacrylate (HEMA) cryogel to prepare pHEMA-(MAAP)2- Th(IV) cryogel polymer by free radical polymerization. Th(IV) was desorbed with 5.0 mol.L-1 HNO3 and thus Th(IV)-imrinted were created onto p-HEMA-(MAAP)2 cryogel polymer. To determine the optimum conditions, in the process of selective binding of Th(IV) ion to Th(IV)-imprinted p-HEMA-(MAAP)2 cryogel polymer, some parameters such as pH, flow rate, initial Th(IV) concentration were investigated. Under the optimum conditions, the maximum binding capacity was obtained as 48.30 mg.g-1. Selectivity studies were also carried out in the presence of Ce(III), La(III) and Eu(III) ions using Th(IV)-imprinted p-HEMA-(MAAP)2 cryogel polymer. It was found that p-HEMA-(MAAP)2 cryogel polymer displayed high selectivity toward Th(IV) ion.

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