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Investigation of the Redox Behavior of Technetium in Borosilicate Glass Melts by Voltammetry

Published online by Cambridge University Press:  26 February 2011

E. Freude ,
W. Lutze ,
C. Rüssel  and
H. A. Schaeffer
E. Freude
Affiliation:
Hahn-Meitner-Institut Berlin GmbH, Glienicker Str. 100. D-IOOO Berlin 39
W. Lutze
Affiliation:
Hahn-Meitner-Institut Berlin GmbH, Glienicker Str. 100. D-IOOO Berlin 39
C. Rüssel
Affiliation:
Univ. Erlangen. Inst, für Werkstoffwissenschaften III, Martensstraβe 5, D-8520, Erlangen
H. A. Schaeffer
Affiliation:
Deutsche Glastechnische Gesellschaft e.V‥ Mendelssonstraβe 75, D-6000 Frankfurt 1
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Abstract

Technetium is a potentially hazardous radionuclide in the waste vitrification process as its oxides are volatile. Electrochemical measurements, i.e. potentiometry and voltammetry are applied to investigate the redox reactions of Tc in the glass melt. Re is studied for comparison. Under normal oxidizing conditions Tc is in the -T-state, and substancial losses of Tc occur as a result of compound volatility. Reducing conditions lead to the formation of TcO2, which precipitates from the melt. Stronger reducing conditions lead to the formation of metallic Tc

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 199
Copyright
Copyright © Materials Research Society 1989

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References

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