How to treat contaminated soil
By combining quicklime, cement-based solidification material, and nonionic surfactant in specific ratios, the method addresses the inefficiencies of quicklime treatment, effectively preventing oil diffusion and improving soil strength.
JP7664735B2Active Publication Date: 2025-04-18TAIHEIYO CEMENT CORP
Patent Information
- Application Number
- JP2021059104
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-03-31
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2041-03-31
AI Technical Summary
Technical Problem
Quicklime treatment for oil-contaminated soil may be insufficient for certain types and concentrations of oil, requiring excessive amounts and lacking effective prevention of oil diffusion.
Method used
A method involving mixing contaminated soil with a treating material composed of quicklime, cement-based solidification material, and a nonionic surfactant, in specific proportions, to prevent oil diffusion.
Benefits of technology
Effectively prevents oil diffusion from contaminated soil using a simple and cost-effective approach, reducing the amount of quicklime needed and enhancing soil strength.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 0007664735000001 
Figure 0007664735000002
Abstract
To provide a contaminated soil treatment method capable of easily preventing diffusion of oils from contaminated soil contaminated with oils.SOLUTION: A contaminated soil treatment method obtains improved soil by mixing contaminated soil containing oils, a treatment material comprising at least one or more kinds selected from quicklime, a cement-based solidifying material, and magnesium oxide, and a nonionic surfactant. A ratio of the treatment material is 90.0 to 99.9 mass%, and a ratio of the nonionic surfactant is 0.1 to 10.0 mass% in the total 100 mass% of the treatment material and the nonionic surfactant. The treatment material and the nonionic surfactant are mixed into the contaminated soil in an amount such that the total amount of the treatment material and the nonionic surfactant is 1.0 pt.mass or more and less than 5.5 pts.mass with respect to 100 pts.mass of the contaminated soil.SELECTED DRAWING: None
Need to check novelty before this filing date? Find Prior Art
Citation Information
Patent Citations
X-ray apparatus
JP1983002000A
Hazardous waste treatment method
JP1992503620A
Method for treating oil polluted soil
JP2002001284A
Method for solidifying and insolubilizing polluted soil, or the like
JP2003334526A
Treatment method for contaminated soil
JP2004322073A