Environmental damage from serious nuclear accidents should be urgently restored, which needs the removal of radioactive species. Radioactive iodine isotopes are particularly problematic for human health because they are released in large amounts and retain radioactivity for a substantial time. Herein, we prepare platinum-coated iron nanoparticles (Fe@Pt) as a highly selective and reusable adsorbent for iodine species, i.e., iodide (I−), iodine (I2), and methyl iodide (CH3I). Fe@Pt selectively separates iodine species from seawater and groundwater with a removal efficiency ≥ 99.8%. The maximum adsorption capacity for the iodine atom of all three iodine species was determined to be 25 mg/g. The magnetic properties of Fe@Pt allow for the facile recovery and reuse of Fe@Pt, which remains stable with high efficiency (97.5%) over 100 uses without structural and functional degradation in liquid media. Practical application to the removal of radioactive 129I and feasibility for scale-up using a 20 L system demonstrate that Fe@Pt can function as a reusable adsorbent for the selective removal of iodine species. This systematic procedure is a standard protocol for designing highly active adsorbents for the clean separation and removal of various chemical species dissolved in wastewater.
|Publication status||Published - 2022 Aug 15|
Bibliographical noteFunding Information:
This work was supported by the mid- and long-term nuclear research and development program (NRF-2017M2A8A5014716 and 2016M2B2B1945256) and by the Institute (2021M2E1A1085202) for Korea Spent Nuclear Fuel (iKSNF) and National Research Foundation of Korea (NRF) grant funded by the Korea government(Ministry of Science and ICT, MSIT). T. H. acknowledges financial support from the Research center Program of the IBS (IBS-R006-D1) in the Republic of Korea. H. J. acknowledges the Korea Atomic Energy Research Institute for a grant (Project No. 522330–22).
© 2022 The Author(s)
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Civil and Structural Engineering
- Ecological Modelling
- Water Science and Technology
- Waste Management and Disposal