Elemental characterization of crystalline silicotitanate following Hanford tank waste processing

Emily L. CampbellEnergy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USACorrespondence[email protected]

https://orcid.org/0000-0002-8069-2160 View further author information

Amy M. WestesenEnergy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USAView further author information

Ferdinan C. ColonEnergy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USAView further author information

Daria BoglaienkoEnergy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USAView further author information

Tatiana G. LevitskaiaEnergy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA

https://orcid.org/0000-0002-6217-3105 View further author information

Reid A. PetersonEnergy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington, USA

https://orcid.org/0000-0003-3368-1896 View further author information

ABSTRACT

To expedite vitrification of low activity waste at the Hanford Site, a Tank-Side Cesium Removal system, using crystalline silicotitanate (CST) as the ion exchange media, is being evaluated. Laboratory scale testing of Cs removal by CST from Hanford tank waste supernates has been conducted by Pacific Northwest National Laboratory. Selectivity and partitioning of analytes on spent CST, specifically RCRA hazardous metals, selected +2 cations, and transuranic elements, were characterized through the complete digestion of CST. The CST was shown to adsorb a relevant fraction of Ca, Cd, Pb, Sr, U, Pu, Np, Am, and potentially Fe by IX and/or other mechanisms.

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This work was supported by the Washington River Protection Solutions.

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Elemental characterization of crystalline silicotitanate following Hanford tank waste processing

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Elemental characterization of crystalline silicotitanate following Hanford tank waste processing

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