REMEDIATION METHOD OF CONTAMINATED SOIL

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PROBLEM TO BE SOLVED : To provide a remediation method of contaminated soil which is capable of improving contaminated soil with a relatively low cost and of relatively easily recycling the improved soil after the improvement of the soil. SOLUTION : The remediation method of contaminated soil comprises excavating the soil S contaminated by a toxic substance A to a predetermined depth without eliminating the soil S, incorporating a soil improvement material B into the excavated soil S in the original excavation site and improving the soil S contaminated by the toxic substance A while repeating the step of mixing the excavated soil S with the soil improvement material B. The method is characterized by using powder, granule or slurry containing a rare earth compound as the soil improvement material B. COPYRIGHT : (C)2008, JPO&INPIT