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Abstract

The chemistry of technetium, including redox properties, complex chemistry, and chemistry of the pertechnetate ion has been reviewed with special emphasis on factors which may be of importance in controlling the environmental behaviour of this element. Under environmental conditions technetium predominantly exists in the oxidation states VII (as TcO-4**-) and IV (e.g. as insoluble TcO-2 or in organic complexes), whereas the other available oxidations states play a minor role only. The majority of technetium complexes appear to be negatively charged and rather stable under aerobic, environmental conditions. The available literature on technetium migration is scarce and rather confusing. However, a priori it can be assumed that in aerobic soils only slight, if any retardation will be observed, whereas substantial immobilization can occur in anaerobic soils, partly due to TcO-2 formation and subsequent precipitation.

Additional information

Authors: NILSSON K, RISOE NATIONAL LABORATORY, ROSKILDE (DENMARK);SKYTTE JENSEN B, RISOE NATIONAL LABORATORY, ROSKILDE (DENMARK);CARLSEN L RISOE NATIONAL LABORATORY, ROSKILDE (DENMARK), RISOE NATIONAL LABORATORY, ROSKILDE (DENMARK)
Bibliographic Reference: EUROPEAN APPLIED RESEARCH REPORTS + NUCLEAR SCIENCE AND TECHNOLOGY SECTION, VOL. 7 (1985), NO. 1, PP. 1-22, (EUR 9779 EN).
Availability: Can be ordered online
Record Number: 1989124112600 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en