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1. Deng, Yi-Ting. Assessing the role of high affinity sorption sites in cesium desorption from hyperalkaline-weathered Hanford sediments.

Degree: MS, Crop and Soil Sciences, 2012, University of Georgia

At the Department of Energy’s Hanford Site, hyperalkaline (pH > 13) and radioactive waste leaking from storage tanks causes rapid sediment weathering and de novo mineral formation—both of which can alter the mobility of the principal radioactive contaminants, Cs and Sr. These new-formed minerals, such as NO3-feldspathoids, sequester contaminants in their structures and the frayed-edge sites (FES) of the sediment clays strongly bind Cs. However the long-term stability of the sequestered contaminants is unknown, so existing reactive-transport models cannot address weathering related impact of the sediments. Our goal is to determine the mechanisms of contaminant release from NO3-feldspathoids and to quantify how the weathering process alters the FES density. Our results suggest that Cs and Sr are released from NO3-feldspathoids through both ion exchange and mineral dissolution. Furthermore, the hyperalkaline-weathering process increases the density of high-affinity Cs sorption sites in Hanford sediments, which may include the FES and also the high-affinity sites on the neo-formed minerals. Advisors/Committee Members: Aaron Thompson.

Subjects/Keywords: Cs Release

…Figure 2.3: Cs release from the 6-month LOW and HIGH treatments during the ~8000 PV leaching… …24 Figure 2.5: The extension of Cs and Sr release from the 6-month and 12-month LOW… …Sr release from these neo-formed minerals (16, 17). Few studies of Cs and Sr… …hyperalkalineweathered Hanford sediments. Thompson et al. (2010) suggested that Cs release from NO3… …FES to Cs sorption in order to predict Cs transport and the mechanisms of Cs release from… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Deng, Y. (2012). Assessing the role of high affinity sorption sites in cesium desorption from hyperalkaline-weathered Hanford sediments. (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/deng_yi-ting_201205_ms

Chicago Manual of Style (16th Edition):

Deng, Yi-Ting. “Assessing the role of high affinity sorption sites in cesium desorption from hyperalkaline-weathered Hanford sediments.” 2012. Masters Thesis, University of Georgia. Accessed November 20, 2019. http://purl.galileo.usg.edu/uga_etd/deng_yi-ting_201205_ms.

MLA Handbook (7th Edition):

Deng, Yi-Ting. “Assessing the role of high affinity sorption sites in cesium desorption from hyperalkaline-weathered Hanford sediments.” 2012. Web. 20 Nov 2019.

Vancouver:

Deng Y. Assessing the role of high affinity sorption sites in cesium desorption from hyperalkaline-weathered Hanford sediments. [Internet] [Masters thesis]. University of Georgia; 2012. [cited 2019 Nov 20]. Available from: http://purl.galileo.usg.edu/uga_etd/deng_yi-ting_201205_ms.

Council of Science Editors:

Deng Y. Assessing the role of high affinity sorption sites in cesium desorption from hyperalkaline-weathered Hanford sediments. [Masters Thesis]. University of Georgia; 2012. Available from: http://purl.galileo.usg.edu/uga_etd/deng_yi-ting_201205_ms

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