Optimizing radionuclide sequestration in anion nanotraps with record pertechnetate sorption

Qi Sun, Lin Zhu, Briana Aguila, Praveen K. Thallapally, Chao Xu, Jing Chen, Shuao Wang (), David Rogers and Shengqian Ma ()
Additional contact information
Qi Sun: University of South Florida
Lin Zhu: Soochow University
Briana Aguila: University of South Florida
Praveen K. Thallapally: Pacific Northwest National Laboratory Richland
Chao Xu: Tsinghua University
Jing Chen: Tsinghua University
Shuao Wang: Soochow University
David Rogers: University of South Florida
Shengqian Ma: University of South Florida

Nature Communications, 2019, vol. 10, issue 1, 1-9

Abstract: Abstract The elimination of specific contaminants from competitors poses a significant challenge. Rather than relying on a single direct interaction, the cooperation of multiple functionalities is an emerging strategy for adsorbents design to achieve the required affinity. Here, we describe that the interaction with the target species can be altered by modifying the local environment of the direct contact site, as demonstrated by manipulating the affinity of pyridinium-based anion nanotraps toward pertechnetate. Systematic control of the substituent effect allows the resulting anion nanotraps to combine multiple features, overcoming the long-term challenge of TcO4− segregation under extreme conditions of super acidity and basicity, strong irradiation field, and high ionic strength. The top material exhibits the highest sorption capacity together with record-high extraction efficiencies after a single treatment from conditions relevant to the used nuclear fuel (Hanford tank wastes, 95%) and legacy nuclear wastes (Savannah River Sites, 80%) among materials reported thus far.

Date: 2019
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DOI: 10.1038/s41467-019-09630-y

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