2010 Fiscal Year Final Research Report
Study on mechanism of Oil contamination and remediation in the ground
| Project/Area Number |
21760375
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geotechnical engineering
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| Research Institution | Kumamoto University |
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Principal Investigator |
MUKUNOKI Toshifumi Kumamoto University, 大学院・自然科学研究科, 准教授 (30423651)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 土壌汚染防止・浄化 / X線 / 土壌圏現象 / 可視化 / 環境技術 |
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| Research Abstract |
The migration of Light Non-Aqueous Phase Liquid (LNAPL) in dry/wet sandy soils was visualized by the model tests in plane strain condition and using X-ray Computed Tomography (CT) method. To evaluate the saturation degree of water or LNAPL in the sandy soil, new method to decide the threshold value in X-ray CT image was proposed in this paper. It was concluded that saturation degree and grain property of sandy soil changed the migration mechanism of LNAPL, and the distribution form of liquids differed by S-p relation of liquids. Sandy soil layer with saturation degree at least more than 20% inhibited the vertical infiltration of LNAPL. More amount of water than LNAPL was retained in near-surface. LNAPL permeation developed around injection point in well graded materials.
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