This octopus grabs radioiodine in nuclear fission systems
S. Himmelstein | October 20, 2023
A new process for capturing radioactive iodine, a byproduct of nuclear fission has been devised by University of Houston researchers. Molecular crystals based on cyclotetrabenzil hydrazones are reusable materials that demonstrate strong iodine uptake capacity, comparable to that of porous metal-organic frameworks and covalent organic frameworks previously considered as the leading solutions for iodine capture.
Each ring-shaped crystal structure features eight protrusions, earning it the moniker “The Octopus.” The material can be produced at a cost of about $1 per gram and serve to preserve the integrity of reactor coatings and enhance containment. The material proved capable of capturing iodine in aqueous and organic solutions, and on the interface between the two. The captured iodine could also then be moved from one area to another to simplify radioactive waste management.
The applications of these organic crystals are not limited to nuclear waste management, as they have shown potential in capturing carbon dioxide. The structure of these carbon-, hydrogen- and oxygen-containing crystals resembles materials used in lithium-ion batteries, hinting at possible energy-related applications.
The research is published in Cell Reports Physical Science.