CESIUM REMOVAL FROM HIGH-pH, HIGH-SALT WASTEWATER USING CRYSTALLINE SILICOTITANATE SORBENT

Simultaneous detection and removal of radioisotopes with modified alginate beads containing an azo-based probe using RGB coordinates

“…The traditional processes include precipitation, extraction, ion-exchange, and adsorption techniques [3][4][5][6]. Meanwhile, ion-exchange techniques are frequently employed for radioisotope separation, as well as for the removal of hazardous products from aqueous waste prior to discharge into the environment [7][8][9].…”

Strontium/strontium‐90 removal from c helate‐bearing Hanford tank waste using crystalline silicotitanate

“…Both Hanford and Savannah River Sites are at various stages in developing or operating processes to remove cesium from the waste using crystalline silicotitanate (CST) as an ionexchange media. [3][4][5][6][7][8][9][10][11] The Savannah River Site CST application for cesium removal is more limited with primary separation by solvent extraction treatment. 12 The CST is highly selective for cesium exchange, even in the presence of high concentrations of Na + .…”

“…The site plans to remove 137 Cs, from the waste to allow for less shielding of downstream processes and contact maintenance of the LAW vitrification facility. Both Hanford and Savannah River Sites are at various stages in developing or operating processes to remove cesium from the waste using crystalline silicotitanate (CST) as an ion‐exchange media 3–11 . The Savannah River Site CST application for cesium removal is more limited with primary separation by solvent extraction treatment 12 .…”

A Potential Wasteform for Cs Immobilization: Synthesis, Structure Determination, and Aqueous Durability of Cs2TiNb6O18

“…IONSIV IE-911 is a material commercially available from UOP and has been used to remove cesium from wastewater in the Fukushima efforts as well as at several Magnox storage ponds in the U.K. and various US locations, including Three Mile Island, Savannah River, and Oak Ridge National Laboratory. , In previous work we showed that hot isostatic pressing of Cs-exchanged IONSIV IE-911 leads to a dense mixture of ceramic phases with the cesium partitioning into Cs 2 TiNb 6 O 18 at lower exchange levels and then a mixture of Cs 2 TiNb 6 O 18 and Cs 2 ZrSi 6 O 15 at higher exchange levels. Cs 2 TiNb 6 O 18 is a pyrochlore analogue first reported by Desgardin et al in 1977 but has been little researched since then.…”