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Report No.
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Fission product separation from seawater by electrocoagulation method

Kitagaki, Toru  ; Hoshino, Takanori ; Sambommatsu, Yuji; Yano, Kimihiko ; Takeuchi, Masayuki ; Igarashi, Takeshi*; Suzuki, Tatsuya*

At the Fukushima Daiichi NPPs, a large amount of seawater containing high activity fission product was accumulated and its treatment has been serious problem. Electrocoagulation method is expected to be part of a useful separation system that can reduce the amount of waste and decrease processing time. In this study, powdered adsorbents, such as ferrocyanide and zeolite, added to seawater containing simulated fission products, and electrocoagulation effect were investigated. As a result, more than 99% of Cs and I were removed. Moreover, rapid solution reactivity with heat was not observed, so the thermal risk of aqueous processing of the aggregation would be low. In addition, thermal analyses showed that the electrocoagulation process did not lead to thermal decomposition. Therefore, in the case electrocoagulation method is applied to decontamination system, it has the potential to thermally stabilize and reduce waste.

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Category:Chemistry, Analytical

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