Radioactive iodine capture in silver-containing mordenites through nanoscale silver iodide formation.
Abstract
The effective capture and storage of radiological iodine ({sup 129}I) remains a strong concern for safe nuclear waste storage and safe nuclear energy. Silver-containing mordenite (MOR) is a longstanding benchmark for iodine capture; however, the molecular level understanding of this process needed to develop more effective iodine getters has remained elusive. Here we probe the structure and distribution of iodine sorbed by silver-containing MOR using differential pair distribution function analysis. While iodine is distributed between {gamma}-AgI nanoparticles on the zeolite surface and subnanometer {alpha}-AgI clusters within the pores for reduced silver MOR, in the case of unreduced silver-exchanged MOR, iodine is exclusively confined to the pores as subnanometer {alpha}-AgI. Consequently, unreduced silver-containing zeolites may offer a more secure route for radioactive iodine capture, with the potential to more effectively trap the iodine for long-term storage.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 983470
- Report Number(s):
- ANL/XSD/JA-67093
Journal ID: ISSN 0002-7863; ISSN 1520-5126; TRN: US1004467
- DOE Contract Number:
- DE-AC02-06CH11357
- Resource Type:
- Journal Article
- Journal Name:
- J. Am. Chem. Soc.
- Additional Journal Information:
- Journal Volume: 132; Journal Issue: 26 ; 2010; Journal ID: ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 29 ENERGY PLANNING, POLICY AND ECONOMY; BENCHMARKS; DISTRIBUTION; DISTRIBUTION FUNCTIONS; GETTERS; IODINE; MORDENITE; NUCLEAR ENERGY; RADIOACTIVE WASTES; SILVER; SILVER IODIDES; STORAGE; ZEOLITES
Citation Formats
Chapman, K W, Chupas, P J, Nenoff, T M, X-Ray Science Division, and SNL,. Radioactive iodine capture in silver-containing mordenites through nanoscale silver iodide formation.. United States: N. p., 2010.
Web. doi:10.1021/ja103110y.
Chapman, K W, Chupas, P J, Nenoff, T M, X-Ray Science Division, & SNL,. Radioactive iodine capture in silver-containing mordenites through nanoscale silver iodide formation.. United States. https://doi.org/10.1021/ja103110y
Chapman, K W, Chupas, P J, Nenoff, T M, X-Ray Science Division, and SNL,. 2010.
"Radioactive iodine capture in silver-containing mordenites through nanoscale silver iodide formation.". United States. https://doi.org/10.1021/ja103110y.
@article{osti_983470,
title = {Radioactive iodine capture in silver-containing mordenites through nanoscale silver iodide formation.},
author = {Chapman, K W and Chupas, P J and Nenoff, T M and X-Ray Science Division and SNL,},
abstractNote = {The effective capture and storage of radiological iodine ({sup 129}I) remains a strong concern for safe nuclear waste storage and safe nuclear energy. Silver-containing mordenite (MOR) is a longstanding benchmark for iodine capture; however, the molecular level understanding of this process needed to develop more effective iodine getters has remained elusive. Here we probe the structure and distribution of iodine sorbed by silver-containing MOR using differential pair distribution function analysis. While iodine is distributed between {gamma}-AgI nanoparticles on the zeolite surface and subnanometer {alpha}-AgI clusters within the pores for reduced silver MOR, in the case of unreduced silver-exchanged MOR, iodine is exclusively confined to the pores as subnanometer {alpha}-AgI. Consequently, unreduced silver-containing zeolites may offer a more secure route for radioactive iodine capture, with the potential to more effectively trap the iodine for long-term storage.},
doi = {10.1021/ja103110y},
url = {https://www.osti.gov/biblio/983470},
journal = {J. Am. Chem. Soc.},
issn = {0002-7863},
number = 26 ; 2010,
volume = 132,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}