title: Al-O-F materials as novel adsorbents for gaseous radioiodine capture.
abstract: Re-processing used nuclear fuel requires a method to effectively capture and dispose of gaseous radioiodine. Previous work has shown that nanoporous Al-O materials are effective at capturing gaseous iodine; molecular dynamics simulations have shown that the addition of fluoride to the Al-O surface should increase the amount of iodine capture. Twelve different materials with different ratios of F:Al were created. These materials were chemically characterized and functionally characterized with respect to gaseous iodine uptake. The addition of fluoride does in fact lead to a substantial (10-100×) increase in iodine uptake per unit surface area. However, the amount of uptake does not appear to be directly related to the total fluoride content of the solid phase material.
authors.affiliation: Sandia National Laboratories, 1515 Eubank Dr. SE, Albuquerque, NM 87123, USA. Electronic address: andmill@sandia.gov.
authors.forename: Andrew
authors.initials: A
authors.lastname: Miller
authors.affiliation: Sandia National Laboratories, 1515 Eubank Dr. SE, Albuquerque, NM 87123, USA.
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D007457:Iodine Radioisotopes / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry
chemical_list: D007457:Iodine Radioisotopes; D010710:Phosphates; C012980:fluorophosphate; D000535:Aluminum; D005459:Fluorides
keywords: Iodine; Nanoporosity; Nanoporous materials; Re-processing; Waste treatment