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Author

Kim, Kwang S.
Center for Superfunctional Materials (CSM)
Research Interests
  • Theoretical/experimental nanosciences, molecular electronics spectroscopy, energy materials

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Radioactive iodine capture and storage from water using magnetite nanoparticles encapsulated in polypyrrole

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Title
Radioactive iodine capture and storage from water using magnetite nanoparticles encapsulated in polypyrrole
Author
Harijan, Dilip K. L.Chandra, VimleshYoon, TaeseungKim, Kwang S.
Keywords
Radioactive iodine;  Magnetic separation;  Adsorption;  Magnetite nanoparticles;  Polypyrrole
Issue Date
201802
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF HAZARDOUS MATERIALS, v.344, no., pp.576 - 584
Abstract
The effective capture and storage of radioactive iodine is of importance for nuclear waste storage during nuclear power station accidents. Here we report Fe3O4@PPy powder containing similar to 12 nm magnetite (Fe3O4) nanoparticles encapsulated in the polypyrrole (PPy) matrix. It shows 1627 mg/g uptake of iodine dissolved in water, within 2 h at room temperature. Fe3O4@PPy is ferromagnetic in nature and can be separated from water using external magnetic field. The nitrogen gas sweeping test at 30 degrees C shows release of 2% iodine from iodine adsorbed Fe3O4@PPy, revealing stable storage of iodine for a moderate period. The iodine-adsorbed magnetic powder can be regenerated by washing with ethanol. The XPS spectrum of iodine adsorbed Fe3O4@PPy confirmed the presence of polyiodides (I-3(-) and I-5(-)) bound to the PPy surface. This excellent iodine capture and storage from iodine contaminated water is an environment friendly, inexpensive and large scale method.
URI
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DOI
http://dx.doi.org/10.1016/j.jhazmat.2017.10.065
ISSN
0304-3894
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