Application of magnetic nanoparticles for the extraction of radium-226 from water samples
| Autor: | Natalie Mesnic, Chunsheng Li, Edward P. C. Lai, Baki Sadi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Chromatography Health Toxicology and Mutagenesis Extraction (chemistry) Liquid scintillation counting Public Health Environmental and Occupational Health Salt (chemistry) Picric acid Pollution Analytical Chemistry chemistry.chemical_compound Nuclear Energy and Engineering chemistry Surface modification Magnetic nanoparticles Radiology Nuclear Medicine and imaging Spectroscopy Crown ether |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 298:1501-1509 |
| ISSN: | 1588-2780 0236-5731 |
| Popis: | Bare (unmodified) and crown ether (CE)- modified Fe3O4 magnetic nanoparticles (MNPs) were investigated for the rapid extraction of 226 Ra from water samples. It involved synthesizing the MNPs, introducing them into the sample solutions, ultrasonicating and agitat- ing the suspension, magnetically separating the nanoparti- cles from solution, and measuring the 226 Ra content in the supernatant. Experimental parameters such as salt choice, salt concentration and pH were optimized to achieve maximum extraction of 226 Ra onto the MNPs. 226 Ra con- tent was determined using a Hidex 300SL liquid scintilla- tion counter with a/b separation capability, or a gamma spectrometric detection system. The bare Fe3O4 nanopar- ticles showed significant pH dependence for the extraction of 226 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 NaClO4, 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 sur- face functionalization of Fe3O4 MNPs with suitable ligand modification can offer a selective mode of extraction for 226 Ra in the presence of its daughter progenies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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