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

The effective capture and storage of radioactive iodine is of importance for nuclear waste storage during nuclear power station accidents. Here we report FeO@PPy powder containing ∼12nm magnetite (FeO) nanoparticles encapsulated in the polypyrrole (PPy) matrix. It shows 1627mg/g uptake of iodine dissolved in water, within 2h at room temperature.