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Sorption behaviour of CS(I) on the tk300 resinfor CS-135/137 separation and analysis

Başlık çevirisi mevcut değil.

  1. Tez No: 786090
  2. Yazar: ELİF EKEBAŞ
  3. Danışmanlar: DR. HİBAAQ MOHAMUD, DR. ELSJE VAN ES
  4. Tez Türü: Yüksek Lisans
  5. Konular: Nükleer Mühendislik, Çevre Mühendisliği, Nuclear Engineering, Environmental Engineering
  6. Anahtar Kelimeler: Belirtilmemiş.
  7. Yıl: 2019
  8. Dil: İngilizce
  9. Üniversite: The University of Birmingham
  10. Enstitü: Yurtdışı Enstitü
  11. Ana Bilim Dalı: Belirtilmemiş.
  12. Bilim Dalı: Belirtilmemiş.
  13. Sayfa Sayısı: 41

Özet

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Özet (Çeviri)

The present study explores the topic of sorption behaviour of Cs(I) on the TK300 resin for the separation and analysis of Cs-135/137. Accurate measurement of Cs-135/137 plays an important role in nuclear decommissioning, long-term waste monitoring and nuclear forensics. Prior to measurement, it is important to efficiently remove stable and radioactive elements that can otherwise prevent accurate detection. To address this issue, TrisKem, the leading European resin manufacturer, has worked on specific resins for use in radioanalytical separation. A new commercial resin, TK300, has been developed by TrisKem for the separation of radiocaesium isotopes. Before the resin can be sold for commercial use it must be fully characterised. The first step of the characterisation process is to investigate the retention ability of Cs(I) and various alkali, alkaline earth, transition, lanthanides and actinide elements on the TK300 resin. Their distribution coefficients (𝐾𝑑) were determined by inductively coupled plasma mass spectrometry (ICP-MS) across a range of hydrochloric (HCl) and nitric acid (HNO3) molarities (0.01 – 10 M). The distribution coefficient (𝐾𝑑) graphs obtained by ICP-MS analysis provided good insight into the sorption properties of caesium as a function of the HCl and HNO3 acid molarity. Overall, it can be seen that 0.01 M HNO3 is a suitable acid solution for Cs loading onto the TK300 resin due to the strong complex that Cs+ and NO3 - forms. The distribution coefficient for Cs and Rb was 2x104 mL g-1 and 2.4x103 mL g-1 , respectively in the presence of 0.01M HNO3 medium. Additionally, it was found that 8M HNO3 was a suitable elution agent due to the Kd for Cs dropping down to 3.8 mL g -1 . Therefore, they can be retained effectively into TK300 resin easily at 0.01M nitric acid medium and eluted by >8M HNO3. The next step for this work is to obtain elution profiles for Cs and Rb and then to test TK300 resin for decommissioning and nuclear forensic samples for source identification.

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