METHOD AND APPARATUS FOR GROUND COLLECTION OF FLOATING MATERIAL AND UNDERGROUND SPRAYING FOR PURIFICATION OF SOIL CONTAMINATED WITH VOLATILE HEAVY METAL AND ORGANIC MATTER, SUCH AS DIOXIN, PESTICIDE, AND OIL
The present invention relates to a method for treating contaminated soil. A method for treating contaminated soil according to the present invention comprises: a cleaning step of inserting a spraying rod including a nozzle into soil to spray a cleaning liquid or an oxidizing liquid thereto; a first collection step of collecting a floating material from the soil after the cleaning step; a first phase separation step of separating the floating material collected in the first collection step into a liquid phase material and a solid phase material; a heating step of inserting a heating member into the solid fraction separated in the phase separation step to heat the solid fraction; a second collection step of collecting steam generated by the heating step; and a pyrolysis step of separating a gas phase material from the floating material separated in the second collection step and performing heat treatment. When contaminated soil is treated by the method according to the present invention, contaminants can be sep
