AER/I Chemistry Seminar with Hannah Johnson
About the event
Presenter: Hannah Johnson
Group: Moreau
Title: Optimizing Metal-Organic Framework Adsorbents for the Recovery of Uranium from Seawater
Abstract: Nuclear power, fueled by uraniumoxide, is an increasingly significant source of global energy due to its low carbon emissions and high efficiency. However, the current mineable supply of uranium is being depleted at a rate of 1% every year, and new sources and methods of uranium recovery will be required to sustain nuclear power as a viable energy source. The world ocean contains one thousand times more uranium than is available in terrestrial deposits at a very dilute level of 3.3ppb, and an extraction technology that is selective and efficient at such low concentrations could potentially sustain the global uranium demand indefinitely. Solid adsorbents, specifically metal-organic frameworks (MOFs), are one class of material that has shown great promise for oceanic uranium extraction, but further optimization is required prior to large-scale applications, namely with regards to the maximum uranium uptake capacity and the adsorption kinetics. Recent studies have demonstrated two effective strategies, functionalization and defect induction, that drastically improve the performance of MOFs as uranium adsorbents by different mechanisms. Both alteration methods, as applied to a representative MOF species UiO-66, are discussed and compared, and some final considerations of this technology’s practicality and applicability are presented.
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Meeting ID: 939 5084 0487
Passcode: 418252
Date & Time: Apr 30, 2021 03:00 PM Pacific Time (US and Canada)