| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
A new decontamination process by application of magnetic separation was investigated using radioactive cesium contaminated sewage sludge. The radioactive cesium which was adsorbed on paramagnetic vermiculite in the soil is carried into sewage sludge by rain water and trapped in the sludge. By using the magnetic column with a 30cm magnet-bar (1T maximum magnetic flux), the contaminated sludge was able to be separated to a small amount of cesium concentrated sludge and large amount of decontaminated sludge. The contaminated actual sludge of 0.37Bq/L was concentrated to 5.4 Bg/L. As a result, the volume of contaminated sludge was able to be reduced to 1/15.
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