Abstract
The physicochemical behaviour of106Ru chloro and nitrosyl-nitrato complex species in sea water atpH 8 were investigated by high-voltage electrophoresis. The106Ru chloro complexes in the sea water system were separated into at least 10 anionic species, one ‘neutral’ hydrolytic species and 2 cationic species. The106Ru nitrosylnitrato complexes in sea water were separated into 3 anionic species, one ‘neutral’ species and 3 cationic species. The absolute electrophoretic mobilities of the separated106Ru species in sea water were found to be constant during the aging period from 48 hrs up to 1 080 hrs. In the initial period up to 48 hrs of aging, considerable physicochemical changes were observed for both the chloro and nitrosyl-nitrato forms of106Ru, as a result of the initial stabilization of the system. The aging of the systems up to 1 080 hrs was followed quantitatively by radiometric counting of the separated soluble species. The significant decrease of the radioactivity of the soluble systems during the aging was found to be due to the precipitation of the ruthenium species. The results obtained are discussed with regard to the consequences that106Ru waste disposal in the sea may have on the marine environment.
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