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

Journal of Hazardous Materials
Dilip K L HarijanKwang S Kim

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 ∼12nm magnetite (Fe3O4) nanoparticles encapsulated in the polypyrrole (PPy) matrix. It shows 1627mg/g uptake of iodine dissolved in water, within 2h 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°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 (I3- and I5-) bound to the PPy surface. This excellent iodine capture and storage from iodine contaminated water is an environment friendly, inexpensive and large scale method.

Citations

Apr 3, 2020·Environmental Science and Pollution Research International·Tongmou GengQingyuan Niu
Feb 19, 2021·ACS Applied Materials & Interfaces·Sanan SongFengqi Liu
Jul 6, 2021·Chemical Science·Jianhong ChangQianrong Fang
Jul 23, 2019·ACS Applied Materials & Interfaces·Shaohui XiongGuipeng Yu
Nov 4, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiangxiang WangJiansheng Li
Dec 29, 2021·Journal of the American Chemical Society·Dan LuoXiaodong Chi

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