Abstract
The silica layer protected magnetite (Fe3O4) NPs were functionalized with phosphate group bearing monomer ethylene glycol methacrylate phosphate (EGMP) and its polymer (poly(EGMP) having affinity toward f-element ions. The polymerizable double bonds of EGMP anchored on silica coated magnetite NPs were used to grow poly(EGMP) chains by γ-rays induced polymerization. It was observed in the extraction studies that Pu4+ ions sorbed preferentially in Fe3O4@SiO2-EGMP NPs over UO22+ ions from 3 mol L−1 HNO3. Contrary to this, Fe3O4@SiO2-poly(EGMP) NPs did not exhibit significant selectivity toward UO22+ and Pu4+ ions under similar chemical conditions. Indicating a multiple ligating groups coordination requirement for the binding of UO22+ ions with phosphate groups.
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Acknowledgements
Shashikala Ojha is thankful to Dr Pradeepkumar K. S., Associate Director, HS&EG and Head RSSD, BARC and R.K. Gopalakrishnan, Head RHCS, RSSD, BARC for giving permission to carry out doctoral work and their keen interest in the present work. Authors are also thankful to Dr P. K. Pujari, Head Radiochemistry Division, BARC for his keen interest in the present work.
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Ojha, S., Chappa, S., Mhatre, A.M. et al. Poly(ethylene glycol methacrylate phosphate) grafting on silica shell formed on magnetite nanoparticles: applications to selective sequestration of f-element ions. J Radioanal Nucl Chem 318, 1171–1179 (2018). https://doi.org/10.1007/s10967-018-6228-z
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DOI: https://doi.org/10.1007/s10967-018-6228-z