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Application of magnetic nanoparticles for the extraction of radium-226 from water samples

Journal of Radioanalytical and Nuclear Chemistry, ISSN: 0236-5731, Vol: 298, Issue: 3, Page: 1501-1509
2013
  • 5
    Citations
  • 0
    Usage
  • 21
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    5
    • Citation Indexes
      5
  • Captures
    21

Article Description

Bare (unmodified) and crown ether (CE)-modified FeO magnetic nanoparticles (MNPs) were investigated for the rapid extraction of Ra from water samples. It involved synthesizing the MNPs, introducing them into the sample solutions, ultrasonicating and agitating the suspension, magnetically separating the nanoparticles from solution, and measuring the Ra content in the supernatant. Experimental parameters such as salt choice, salt concentration and pH were optimized to achieve maximum extraction of Ra onto the MNPs. Ra content was determined using a Hidex 300SL liquid scintillation counter with α/β separation capability, or a gamma spectrometric detection system. The bare FeO nanoparticles showed significant pH dependence for the extraction of Ra from an aqueous solution over a pH range of 2-10. They gave an extraction of 95 ± 1 and 98 ± 1 % at pH 9 in 0.1 M NaCl and 0.1 M NaClO, respectively, whereas an extraction of 8-24 % was obtained, over the pH ranges from 2 to 5. The CE-modified MNPs yielded extraction efficiencies as high as 99 ± 1 % in the presence of 0.01 M picric acid at pH 4. This study demonstrates that the surface functionalization of FeO MNPs with suitable ligand modification can offer a selective mode of extraction for Ra in the presence of its daughter progenies. © 2013 Akadémiai Kiadó, Budapest, Hungary.

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