Removal of Trace Amounts of Co-60 from NPP Waste Water Using UV-C Irradiation, TiO{sub 2} and Co-Treat Inorganic Ion Exchange Media - 16025
- University of Helsinki (Finland)
- Fortum Power and Heat Oy (Finland)
The removal of Co-60 from an aqueous nuclear liquid waste obtained from a BWR NPP was tested using a two-step process. In the first phase the liquid waste was oxidized with ultraviolet irradiation at 254 nm (UV-C irradiation) together with a photo-catalyst, TiO{sub 2} P25 AEROXIDE, to degrade the organic complexing agents present in the solution. During some of the experiments it was noticed that TiO{sub 2} P25 AEROXIDE also removed Co-60 from the solution. In the second phase the UV-C irradiated solution was mixed with inorganic ion exchange media, Co-Treat, to remove the rest of Co-60 from the solution. The effect of pH and contact time with UV-C irradiation were evaluated and both had a noticeable effect on the results. Best results were attained when pH of the initial test solution was lowered to 3.5 ± 0.2 before the UV-C irradiation. From the initial Co-60 activity, 2.2 Bq/ml, the activity decreased to 0.03 ± 0.01 Bq/ml after 24 hours of UV-C irradiation together with the photo-catalyst and mixing with Co-Treat. (authors)
- Research Organization:
- WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)
- OSTI ID:
- 22837939
- Report Number(s):
- INIS-US--19-WM-16025
- Country of Publication:
- United States
- Language:
- English
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