Estimation of Cesium Ion Exchange Distribution Coefficients for Concentrated Electrolytic Solutions When Using Crystalline Silicotitanates

Preliminary Ion Exchange Modeling for Removal of Technetium from Hanford Waste Using SuperLig 639 Resin

“…This variation can be addressed in a thermodynamically consistent manner using the approach presented by Polzer et al (1992). An application of this technique is presented in Zheng et al (1995) for cesium ion exchange using crystalline silicotitanates (CSTs). However, in the development that follows average values for the selectivity coefficients are assumed.…”

“…(4-5) implicitly assumes that a single surface site represents an ionic exchange unit. For some exchange systems multiple surface sites constitute an ionic exchange unit (Zheng et al, 1995) which can have profound effects on certain ionic species.…”

Preliminary Ion Exchange Modeling for Removal of Cesium from Hanford Waste Using Hydrous Crystalline Silicotitanate Material

“…Supporting information and earlier modeling are provided by Zheng et al (1995) and Zheng et al (1996). Further information on ZAM is available by contacting Rayford G. Anthony at e-mail: RG-ANTHONY@TAMU.edu, Telephone (409) This appendix contains or references the information necessary for using version 4 or 5 of the ZAM code (i.e., executables referred to as CSTIEXV4 or CSTIEXV5; CST Ion Exchange Version 4 or 5).…”

Technical Report: Growth of Environmental Science at the NSLS

“…[24,25] in examining the potential application of crystalline silicotitanates (CST) as ion exchangers for the sequestration of 137 Cs and 90 Sr from radioactive nuclear waste solutions. The selectivity for Cs + , even in highly alkaline solutions of 1-7M NaOH and NaNO 3 [26], and its physicochemical resistance to crystalline deterioration by both high TECHNICAL REPORTS radiation fields and high pH (>12) solutions, make CST a promising candidate for selective removal of Cs + from waste solutions.…”