Capturing Radionuclides

  • Author: ChemistryViews.org
  • Published: 14 November 2015
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Chemical Science/Royal Society of Chemistry (RSC)
  • Associated Societies: Royal Society of Chemistry (RSC), UK
thumbnail image: Capturing Radionuclides

The fission of uranium in nuclear power plants generates radionuclides such as 137Cs and 90S. These isotopes have halflives of roughly 30 years. Selectively removing them from nuclear waste could facilitate safe storage until their activity has decreased sufficiently.


Mercouri G. Kanatzidis, Northwestern University, Evanston, USA, and colleagues have developed the layered sulfide K2xSn4−xS8−x (x = 0.65–1). The team synthesized the compound by heating potassium carbonate, tin powder, and elemental sulfur in a hydrothermal process at 220 °C for 15 hours. The resulting sulfide was characterized by X-ray crystallography, as well as IR and Raman spectroscopy. It crystallizes in the space group P21/c, and consists of anionic layers composed of SnS6 octahedra and SnS4 tetrahedra, with potassium cations between the layers.


The interlayer potassium ions can be exchanged for Cs+, Sr2+, or UO22+ ions rapidly, capturing the radionuclides. The researchers suggest further investigations into the use of the material for nuclear waste storage.


 

Article Views: 1252

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH