Bibliographic Citation
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Title | New Metal Niobate and Silicotitanate Ion Exchangers: Development and Characterization |
Creator/Author | Su, Yali ; Li, Liyu ; Nenoff, Tina M. ; Nyman, May ; Navrotsky, Alexnadra ; Xu, Hongwu |
Publication Date | 2003 Sep 11 |
OSTI Identifier | OSTI ID: 826238 |
Other Number(s) | TRN: US200425%%58 |
Resource Type | Conference |
Resource Relation | Conference: 226th American Chemical Society Meeting, New York, NY (US), 09/07/2003--09/11/2003; Other Information: PBD: 11 Sep 2003 |
Research Org | Arizona State University, Tempe, AZ; Pacific Northwest National Lab., Richland, WA; Sandia National Labs., Albuquerque, NM; University of California, Davis, CA (US) |
Sponsoring Org | USDOE Office of Science (SC) (US) |
Subject | 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CERAMICS; ION EXCHANGE MATERIALS; NIOBATES; PEROVSKITES; REMOVAL; SOLVENT EXTRACTION; STABILITY; THERMODYNAMICS; WASTE FORMS; WASTES |
Description/Abstract | We are evaluating new metal niobate and silicotitanate ion exchangers for Cs and Sr removal and their related condensed phases as potential ceramic waste forms. The goal of the program is to provide DOE alternative materials that can exceed the solvent extraction process for removing Cs and Sr from high level wastes and technical alternatives for disposal of silicotitanate and niobate based ion exchange materials. To date we have determined the structural property relationship and thermodynamic stability of new silicotitanate and niobate based ion exchangers and their thermally converted phases. Several new phases include Na2Nb2-xMIV xO6-x(OH)x {center_dot} H2O (MIV=Ti, Zr, x=0.04 {approx} 0.4, SOMS), NaTixNb1-xO3-0.5x, Na2-xMxNb1.6Ti0.4O5.8+yx (M=Sr, Y), CsTixAl1-xSi2O6+x/2 (0 x 1), and Cc- A2TiSi6O15 (A=K, Rb, Cs) have been synthesized and characterized and results will be presented. Additionally, chemical, thermal, radiation, and thermodynamic stabilities of the new ion exchange materials and their related perovskites as potential ceramic waste forms will also be presented at the meeting. |
Country of Publication | United States |
Language | English |
Format | Size: vp. |
Availability | American Chemical Society Meeting |
System Entry Date | 2004 Sep 06 |
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