The chemical yield of technetium by an anion exchange (AG 1-X4) procedure is determined under different conditions from 200 liters sea water. A new method for collecting 99Tc from 200-400 liters sea water has been developed by anion exchange. The evaporation rates of RuO4 and TcO-4 are determined at 100°C in 0.1 N H2SO4. A higher decontamination factor 2.S x105 - 2.4 x 107 for ruthenium is obtained by evaporating the RuO4 at 100°C in 0.1 N H2SO4. The ruthenium is oxidized to RuO-4 with NaClO at pH = 9. Fe(OH)3 scavenging, AgCl precipitation and 5% TIOA/xylene extraction at controlled valence are used for decontamination of ruthenium, 110mAg and other nuclides. The chemical yield of technetium-99 in the procedure is about 70%.
|Place of Publication||Roskilde|
|Publisher||Risø National Laboratory|
|Number of pages||20|
|Publication status||Published - 1988|