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- W1978451360 abstract "► 87–89% of 134 Cs and 137 Cs in radioactive ash were removed by three washings. ► Electro-decontamination for 8–10 days lowered the radioactivity of ash below 2 Bq/g. ► Electrokinetic decontamination efficiency for 6.5 h–4.3 day was the highest. ► Electrokinetic decontamination efficiency after 7.2 days promptly became low. To remove more than 85% of 137 Cs and 134 Cs from radioactive ash through a washing–electrokinetic technology, many washing and electrokinetic experiments at a laboratory scale were carried out to obtain the optimum reagent type, its concentration, and the decontamination time. Pilot-sized washing–electrokinetic equipment suitable to the radioactive ash generated in Fukushima Japan was manufactured. In addition, to remove more than 93% of 137 Cs and 134 Cs from the washed ash, electrokinetic decontamination experiments using 50 L pilot-sized electrokinetic equipment were carried out. When the initial 137 Cs concentration of radioactive ash was 41.8 Bq/g, the removal efficiency of 137 Cs in the radioactive ash after three washings was 89.1%. Additionally, the required electrokinetic decontamination time to decontaminate the 137 Cs concentration below 2.0 Bq/g was 10 days, and at that time, the removal efficiency of the 137 Cs was 95.3%. Also, when the initial 134 Cs concentration of radioactive ash was 31.5 Bq/g, the removal efficiency of 134 Cs in the radioactive ash after three washings was 89.0%. In addition, the required electrokinetic decontamination time to decontaminate the 134 Cs concentration below 2.0 Bq/g was 8 days, and at that time, the removal efficiency of 137 Cs was 94.4%. It was conclusively found that 87–89% of the 134 Cs and 137 Cs in the radioactive ash was removed by three washings, and the radioactive ash contaminated with 30–40 Bq/g of 134 Cs and 137 Cs needs to be decontaminated with electrokinetic equipment for 8–10 days after three washings to reach below 2.0 Bq/g." @default.
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- W1978451360 date "2013-07-01" @default.
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- W1978451360 title "Cs-137 and Cs-134 removal from radioactive ash using washing–electrokinetic equipment" @default.
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- W1978451360 doi "https://doi.org/10.1016/j.anucene.2013.02.016" @default.
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