Tetraethylene glycol-based polymer networks for the efficient removal of radioactive methyl iodide and iodine vapor

Abstract

Capturing radioiodine species produced during nuclear fuel reprocessing and nuclear accidents is crucial for nuclear safety, environmental protection, and public health. Here, we synthesized three tetraethylene glycol-based polymers, which were...

Linking Nitrogen-Rich Pillar[5]arene to Hyper-Cross-Linked Polymers for Efficient and Simultaneous Capture of Iodine and Methyl Iodide

“…After CH 3 I adsorption, HCP could be regenerated thoroughly by pickling. The regenerated HCP conserved 97–99% of its original adsorption ability for CH 3 I over five full cycles (Figure b) . There are no obvious signals ascribed to iodine that appeared in the energy-dispersive X-ray spectroscopy (EDS) mapping of the regenerated P­[5]­A-TPTA12 , further confirming the complete regeneration of material (Figure S11).…”

“…Materials with various structures − have been used to adsorb iodine successfully. Various sites, including metals (e.g., Ag and Sn), electron-rich groups (e.g., nitrogen (N), sulfur (S), oxygen (O), and aromatic rings), and cationic groups (e.g., [RN-(CH 3 ) 3 ] + ·Br – ) can promote the adsorption of iodine. ,,− Some materials have been constructed for the efficient adsorption of CH 3 I. − These adsorbents contain Ag or nucleophilic N sites, and adsorption is achieved by forming AgI or pyridinium/quaternary ammonium salts. It is thus clear that the Ag and nucleophilic N sites can capture both I 2 and CH 3 I.…”

Amide-Linked cis,cis-1,3,5-Cyclohexanetricarbonyl-Based Porous Organic Polymers for the Uptake of Iodine in Solution and Vapor Phase

“…To ensure the use of nuclear energy, it is important to store nuclear waste safely . Usually, the process of nuclear energy generation through uranium ( 235 U) fission results in the creation of various detrimental radioactive isotopes, such as technetium ( 99 Tc), selenium ( 79 Se), iodine ( 129 I, 131 I), krypton ( 85 Kr), and other organic iodides (e.g., methyl iodide and ethyl iodide). − Inorganic compounds containing radioactive iodine, such as HI, HOI, and ICN, were also found to be present, although typically in very small quantities . The global impact of nuclear waste, including radioactive iodine ( 129 I and 131 I), has drawn attention due to its adverse effects on environmental and biological health caused by radiation.…”