Preparation and ion exchange studies of cesium and ...
The NaFeTiO was found to follow the ion exchange mechanism, in which the sodium ion from NaFeTiO was exchanged with cesium or strontium ion from aqueous phase. The strontium exchange capacity on NaFeTiO was determined to be 233 mg g −1 .
Ion Exchange - an overview | ScienceDirect Topics
The ion exchange material used is clinoptilolite, a naturally occurring zeolite that is quite specific for cesium and strontium. These species are sufficiently removed by the SIXEP process for the treated basin purge water to meet regulatory requirements for discharge to the ocean.
Ion Exchange of Cesium on Potassium Nickel ...
Mar 30, 2007 · The ion exchange of Cs+ on a nonstoichiometric compound K0.87Ni0.57[NiFe(CN)6]·nH2O (KNiFC) was examined by batch methods. The distribution coefficient of Cs+, Kd,Cs, was independent of Na+ concentration up to 5M (=mol/dm3), while it decreased with increasing concentrations of both K+ and NH4 +.
Cesium ion exchange using actual waste: Column size ...
Nov 01, 2019 · To support the development of a cesium ion exchange process, laboratory experiments produced column breakthrough curves using wastes simulants in 200 mL columns. To verify the validity of the simulant tests, column runs with actual supernatants are being planned.
Ion exchange of cesium by crystalline silico-titanates ...
The crystalline silico-titanates developed by the Department of stone Engineering at Texas A&M University, Sandia National Laboratories and UOP exhibits extremely high ion exchange selectivity for removing cesium from aqueous defense wastes.
Cesium and Strontium Ion Exchange on the Framework ...
Abstract. The ion exchange properties of the titanium silicate, M 2 Ti 2 O 3 SiO 4 · n H 2 O (M = H, Na), toward stable and radioactive 137 Cs + and 89 Sr 2+, have been examined. By studying the cesium and strontium uptake in the presence of NaNO 3, CaCl 2, NaOH, and HNO 3 (in the range of 0.01−6 M) the sodium titanium silicate was found...
Small-Column Cesium Ion Exchange Elution Testing of ...
Cesium ion exchange loading and elution curves were generated for a nominal 5 M Na, 2.4E-05 M Cs, 0.115 M Al loading solution traced before beginning testing with 134 Cs.
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Fast Anion-Exchange in Highly Luminescent Nanocrystals of ...
Fast Anion-Exchange in Highly Luminescent Nanocrystals of Cesium ... as ion-exchange reactions, provide an avenue to compositional fine-tuning or to ... exchange in highly luminescent semiconductor nanocrystals of cesium lead halide perovskites (CsPbX 3, X = …
MODELING CST ION EXCHANGE FOR CESIUM REMOVAL FROM …
Small Column Ion Exchange (SCIX) treatment for cesium removal is a primary in-riser technology for decontamination prior to final waste immobilization in Saltstone. Through this process, radioactive cesium from the salt solution is adsorbed onto the ion exchange media …
Electroactive magnetic microparticles for the selective ...
Apr 05, 2020 · To improve operability as well as the removal efficiency for cesium ions in the wastewater treatment, a novel electrochemically switched ion exchange …
Cesium and Strontium Removal with Highly Selective Ion ...
In the first cesium removal system the engineered zeolite is used in a 1.2 m. 3. bed [10]. If the density of that material is about 0.9 kg/l, one vessel contains about 1080 kg of ion exchange media. The performance of this system in its early days of operation and …
Direct Feed Low-Activity Waste (DFLAW) - Washington River ...
Ion Exchange: Radioactive cesium is soluble in water and cannot be filtered out. Ion exchange is used to remove the cesium molecules from the liquid supernate in Hanford’s waste tanks. Ion exchange resins are very small stone beads placed in a column.
Exceptionally Selective Removal of Cesium and Strontium ...
Both organic and inorganic ion exchange materials have been developed for the selective removal of cesium and strontium in both LLW and HLW. These materials are available in a variety of forms with widely different stone and physical properties. In general, an ion exchanger is chosen based upon its suitability for a given application. o