Please view the posters presented at the 18th Annual CityTech Faculty and Student Research Poster Session below. You can click on each poster to enlarge it and view the PDF version under the poster abstract.
We thank all presenters for sharing their innovative and informative research with the CityTech community and beyond!
11. Strategies for the Photoreduction of Tc-99 Pertechnetate to Low ValentTc by Keggin Polyoxometalates
Technetium-99 (99Tc) is a hazardous radiological contaminant, which in its predominant form of pertechnetate (TcO4-) is highly mobile in the environment. Most strategies for the removal of pertechnetate from the environment involve uptake and or absorption of pertechnetate using resins, clays, and cationic metal-organic frameworks. In this work, we investigate using the “plenary” Keggin polyoxometalates (POMs), (XW12O40n-)(X = P, Si, Al, n = 3, 4, 5) as a - photocatalyst to both reduce TcO4 and stabilize the reduced Tc species. We report on the mechanism by which the reduction of Tc occurs and find that these - POMs promote the reduction of TcO4 from TcVII to lower valent states. X-ray absorption spectroscopy was used to confirm TcIV and TcV species. View or download a PDF version of this poster.
