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Home / Publications / Journals / Nuclear Science and Engineering / Volume 181 / Number 3

Impact of Magnesium Oxide Preparation Conditions on Iodine Adsorption Capacity

Pengcheng Li, Matthew T. Bernards

Nuclear Science and Engineering / Volume 181 / Number 3 / November 2015 / Pages 310-317

Technical Paper /

First Online Publication:September 28, 2015
Updated:November 4, 2015

Radioactive iodine gas is a problematic species in multiple nuclear energy–related applications. Therefore, it is highly desirable to develop an adsorbent that has a high capacity for iodine. In this investigation, the iodine adsorption capacity of high-purity magnesium oxide was investigated as a function of the calcination conditions. Differences in the magnesia substrates were characterized by scanning electron microscopy and X-ray diffraction, and the iodine adsorption capacity was determined using thermogravimetric analysis. The results indicate that the calcination temperature and time have a significant impact on the adsorption capacity, with longer times and higher temperatures having a negative impact. However, under the optimal calcination conditions identified in this study (550°C for 20 min), the high-purity magnesia was found to have an adsorption capacity >300 mg of iodine per gram of sorbent. This suggests that magnesia holds promise for nuclear applications where iodine gas adsorption would be beneficial.

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