scholarly journals Modeling of Crystalline Silicotitanate Ion Exchange Columns Using Experimental Data from SRS Simulated Waste

10.2172/4768 ◽  
1999 ◽  
Author(s):  
D.D. Walker
Keyword(s):  
Experimental Data ◽  
Ion Exchange ◽  
Simulated Waste ◽  
Crystalline Silicotitanate

Equilibrium Sorptions in Heterogeneous Ion Exchange Membranes

1992 ◽  
Vol 57 (9) ◽  
pp. 1905-1914
Author(s):  
Miroslav Bleha ◽  
Věra Šumberová
Keyword(s):  
Experimental Data ◽  
Ion Exchange ◽  
Total Content ◽  
Distribution Coefficients ◽  
Exchange Capacity ◽  
Ion Exchange Membranes ◽  
Ion Exchange Capacity ◽  
Equilibrium Sorption ◽  
Inhomogeneity Factor

The equilibrium sorption of uni-univalent electrolytes (NaCl, KCl) in heterogeneous cation exchange membranes with various contents of the ion exchange component and in ion exchange membranes Ralex was investigated. Using experimental data which express the concentration dependence of equilibrium sorption, validity of the Donnan relation for the systems under investigation was tested and values of the Glueckauf inhomogeneity factor for Ralex membranes were determined. Determination of the equilibrium sorption allows the effect of the total content of internal water and of the ion-exchange capacity on the distribution coefficients of the electrolyte to be determined.

Experimental data and assessment of predictive modeling for radium ion-exchange on beidellite, a swelling clay mineral with a tetrahedral charge

2017 ◽  
Vol 85 ◽  
pp. 1-9 ◽  
Author(s):  
Valentin Robin ◽  
Emmanuel Tertre ◽  
Catherine Beaucaire ◽  
Olivier Regnault ◽  
Michael Descostes
Keyword(s):  
Experimental Data ◽  
Ion Exchange ◽  
Clay Mineral ◽  
Predictive Modeling ◽  
Swelling Clay

scholarly journals Ion Exchange Processing of AP-105 Hanford Tank Waste through Crystalline Silicotitanate in a Staged 2- then 3-Column System

2021 ◽  
Author(s):  
Sandra Fiskum ◽  
Amy Westesen ◽  
Andrew Carney ◽  
Truc LT Trang-Le ◽  
Reid Peterson
Keyword(s):  
Ion Exchange ◽  
Column System ◽  
Crystalline Silicotitanate ◽  
Tank Waste

Ion Exchange of Selected Group II Metals and Lead by Crystalline Silicotitanate and Competition for Cs Exchange Sites

2020 ◽  
Vol 39 (1) ◽  
pp. 90-103
Author(s):  
Emily L. Campbell ◽  
Sandra K. Fiskum ◽  
Truc T. Trang-Le ◽  
Reid A. Peterson
Keyword(s):  
Ion Exchange ◽  
Crystalline Silicotitanate ◽  
Group Ii

New Crystalline Silicotitanate (CST) Waste Forms: Hydrothermal Synthesis and Characterization of CS-SI-TI-O Phases

1999 ◽  
Vol 556 ◽  
Author(s):  
M. Nyman ◽  
T. M. Nenoff ◽  
Y. Su ◽  
M. L. Balmer ◽  
A. Navrotsky ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Hydrothermal Synthesis ◽  
Ion Exchange ◽  
Borosilicate Glass ◽  
Waste Form ◽  
Synthesis And Characterization ◽  
Hanford Site ◽  
Waste Forms ◽  
Crystalline Silicotitanate

AbstractThe radioactivity of the Hanford site waste tanks is primarily from 137Cs and 90Sr, of which can both be selectively removed from solution using a crystalline silicotitanate (CST) ion exchanger. We are currently seeking waste forms alternative to borosilicate glass for Cs-CSTs. In order to obtain a fundamental basis for the development of an alternative waste form, we are investigating synthesis and characterization of CST component phases, namely Cs-Si-Ti-O phases. Two novel Cs-Ti-Si-O phases (one porous, one condensed) have been hydrothermally synthesized, characterized and evaluated as waste form candidates based on chemical and thermal stability, leachability, and ion exchange capabilities.

The Interaction of Bituminized Ion-Exchange Resins With Different Leachants

1984 ◽  
Vol 44 ◽  
Author(s):  
M. Valkiainen ◽  
Ulla Vuorinen ◽  
Paula Uotila
Keyword(s):  
Ion Exchange ◽  
Cation Exchanger ◽  
Deionized Water ◽  
Ion Exchange Resins ◽  
Leaching Tests ◽  
Surrounding Water ◽  
Waste Products ◽  
Leach Rate ◽  
Simulated Waste ◽  
Exchange Resins

AbstractLeaching tests on bituminized ion-exchange resins from Olkiluoto power plant were made according to ISO/DIS 6961 in deionized water and groundwater. Simulated waste products including Cs and Sr were leached in cement water. A clear difference is seen between the water types. With cobalt in granular resins the leach rate in groundwater is three orders of magnitude higher than in deionized water, the latter being in the order of 10–15 m/s.The bituminized cation exchanger is still operating and changing ions with the surrounding water. Bitumen provides a hindering diffusion barrier.Bituminized resin absorbs water from the surroundings and the weight (and volume) of the product increases 10–80 % in 898 days compared to the original value. The weight increase is slower with bituminized powdered resins than with granular resins.Due to differencies in densities between bitumen and both anion and cation ion-exchangers, a distinct sedimentation effect of granular mixed bed exchangers is observed. The cation exchanger is separated on the bottom of the 200 1 drum while the anion exchanger is separated in the upper part of the drum.

Sorption of Cs, Ni, Pb, Eu(III), Am(III), Cm, Ac(III), Tc(IV), Th, Zr, and U(IV) on MX 80 bentonite: An experimental approach to assess model uncertainty

2006 ◽  
Vol 94 (9-11) ◽  
Author(s):  
Bernd Grambow ◽  
Massoud Fattahi ◽  
Gilles Montavon ◽  
C. Moisan ◽  
E. Giffaut
Keyword(s):  
Experimental Data ◽  
Ion Exchange ◽  
Model Uncertainty ◽  
Mineral Assemblage ◽  
Experimental Approach ◽  
Surface Complexation ◽  
Fission Products ◽  
Exchange Model ◽  
Dissolution Properties

A multi-site surface complexation/ion exchange model for dispersed MX 80 bentonite has been calibrated, considering the dissolution properties of the constituting mineral assemblage, for sorption of a large number of radionuclides, using experimental data from the present study together with well constrained literature data. Emphasis was on tri- and tetravalents actinides and fission products and reducing groundwater compositions.

ION EXCHANGE OF SEVERAL RADIONUCLIDES ON THE HYDROUS CRYSTALLINE SILICOTITANATE, UOP IONSIV IE-911

1999 ◽  
Vol 34 (6-7) ◽  
pp. 1145-1166 ◽  
Author(s):  
M. E. Huckman ◽  
I. M. Latheef ◽  
R. G. Anthony
Keyword(s):  
Ion Exchange ◽  
Crystalline Silicotitanate
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