APPLICATION OF SOIL SIZE SEPARATION AND MICRO-BABBLE FLOTATION FOR THE CESIUM CONTAMINATED SOIL
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- MIURA Kazuhiko
- 鹿島建設株式会社 環境本部
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- KAWANO Maiko
- 鹿島建設株式会社 技術研究所
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- KUSAKA Eishi
- 京都大学エネルギー科学研究科
Bibliographic Information
- Other Title
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- セシウム汚染土壌を対象とした分級処理とマイクロバブル浮選による固液分離の適用研究
Abstract
<p> As a method of remediation and recycling for the radioactive cesium contaminated soil caused by the explosion of Fukusima Daiichi Nuclear Power Plant, it is promising to apply soil size separation that can be treated in large quantities and at relatively low cost.. In this study, fine size classification to separate particles under 20 m is proposed in order to increase the concentration rate and the recycling rate. As a post-treatment technology, solid-liquid separation by microbubble flotation (MBF) was performed in order to solve the problems in sedimentation separation using a general coagulant precipitant.</p><p> Since most of the target soil is derived from farmland, a combination of a foaming agent and a collector that has a wide range of effects is selected for inexperienced target mud water containing not only soil particles but also organic fine particles. It was confirmed that the target turbidity could be achieved by finely adjusting the flow rate and the amount of collector. By this combined system of fine soil size separation and MBF, it was confirmed that radioactive cesium could be concentrated in the fraction of 20 m or less, and the possibility as a new practical volume reduction method for radioactive Cs contaminated soil was shown.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76 (6), II_73-II_80, 2020
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390850247499646208
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- NII Article ID
- 130007995872
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- ISSN
- 21856648
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed