Selective Sorption of Technetium-99 on Modified Tin Dioxide
- Helsinki Univ., Laboratory of Radiochemistry, Department of Chemistry (Finland)
A novel tin dioxide shows excellent, almost quantitative, uptake properties for technetium-99. Its distribution coefficients (K{sub d} values) for technetium are typically over 1 000 000 in solutions near neutral pH in one molar ionic competition, and uptake remains high over a broad pH region: pH 2-11. By comparison, normal organic resins yield K{sub d} values less than 200. The variation in technetium uptake as a function of pH indicates two types of uptake mechanisms: acidic solutions (pH 2-4) show an uptake trend typical for weakly acidic cation exchange, and near neutral to basic solutions (pH 4-11) show an uptake trend typical for weakly basic anion exchange. Here, the possible uptake mechanisms by ion exchange process are discussed, and proposals are made for elucidating the exact sorption process. (authors)
- Research Organization:
- WM Symposia, 1628 E. Southern Avenue, Suite 9 - 332, Tempe, AZ 85282 (United States)
- OSTI ID:
- 21294761
- Report Number(s):
- INIS-US-09-WM-07435; TRN: US10V0295040951
- Resource Relation:
- Conference: WM'07: 2007 Waste Management Symposium - Global Accomplishments in Environmental and Radioactive Waste Management: Education and Opportunity for the Next Generation of Waste Management Professionals, Tucson, AZ (United States), 25 Feb - 1 Mar 2007; Other Information: Country of input: France; 11 refs
- Country of Publication:
- United States
- Language:
- English
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