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Actinides selective extractants coated magnetite nanoparticles for analytical applications |
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| Authors: | Ojha Shashikala Chappa Sankararao Mhatre Amol M. Singh Krishan Kant Chavan Vivek Pandey Ashok K. |
| Affiliation: | 1.Radiation Safety Systems Division, Bhabha Atomic research Centre, Trombay, Mumbai, 400085, India ;2.Homi Bhabha National Institute, TSH Complex, Anushakti Nagar, Mumbai, 400094, India ;3.Radiochemistry Division, Bhabha Atomic Research Centre, Troambay, Mumbai, 400085, India ;4.Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India ;5.Department of Physics, Sungkyunkwan University, Seoul, Republic of Korea ; |
| Abstract: | N,N,N′,N′-tetraoctyl diglycolamide (TODGA) and bis(2-ethylhexy)phosphoric acid (HDEHP) were coated on Fe3O4 nanoparticles under different chemical conditions. The TODGA-coated magnetite nanoparticles (Fe3O4@TODGA) captured representative actinides Am(III) and Pu(IV) at 3–4 M HNO3 with high efficiency. However, the HNO3 induced pre-organization of TODGA, before coating on the magnetite nanoparticles, was found to be important for the sorption of Am(III) and Pu(IV) ions. The Fe3O4@HDEHP particles exhibited selectivity toward Pu(IV), and Am(III) did not sorb from 3 to 4 M HNO3. The quantification of Pu(IV) preconcentrated on coated particles was carried out by removing the extractant coating in dioxane based scintillator, followed by liquid scintillation counting. |
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