| Autor: |
Cheremiskin, V., Shmakov, L., Pereguda, V., Tishkov, V., Chernikin, A., Cheremiskin, S., Chaliyan, A., Novolodskii, V. |
| Předmět: |
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| Zdroj: |
Radiochemistry; Apr2012, Vol. 54 Issue 2, p168-173, 6p |
| Abstrakt: |
Oxidized bottom residue (BR) from installations for reprocessing trap waters of the Leningrad NPP were treated to remove Co by coprecipitation with transition metal diethyldithiocarbamates (DDTC). Coprecipitation of Co with manganese and cobalt diethyldithiocarbamates was examined in relation to pH of solution, temperature, amount of diethyldithiocarbamates, reagent ratio, and number of coprecipitation steps. The effect of diethyldithiocarbamates on the efficiency and conditions of the solution decontamination from Cs on nickel potassium ferrocyanides was studied. Oxidative treatment of liquid radioactive waste concentrates to break down organic complexes is a necessary condition for Co removal by coprecipitation with transition metal diethyldithiocarbamates. From a solution initially containing 56 kBq dmCo, Co can be removed to a residual content of 0.12-0.16 kBq dm by two-step coprecipitation with Co(DDTC). The coprecipitation with Co(DDTC) does not affect the efficiency of the subsequent removal of Cs radionuclides on nickel potassium ferrocyanides. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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