POLLUTION PURIFICATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a pollution purification method which enables cleaning treatment in situ, improvement in the treatment efficiency of a polluted object such as polluted soil or the like, shortening of the treatment period and lowering the cost of the treatment. SOLUTION: The pollution treatment method comprises steps of forming a dug hole reaching polluted soil 10 by digging the ground 12 in which the polluted soil 10 exists, freezing the peripheral part of the dug hole 16 by injecting liquefied carbon dioxide 20 in the dug hole 16 so as to draw pollutants 22 in the peripheral part of the dug hole 16 to the surrounding of the dug hole 16 by the freezing, and removing the pollutants 22 drawn in the surrounding of the dug hole 16. COPYRIGHT: (C)2003,JPO