| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for removing contaminant, in which even the contaminant existing in soil or the like over a wide range under, for instance, a conventional construction is efficiently removed by improving the movement of a chemical in soil. SOLUTION: The method for removing the contaminant comprises: an injection well disposition process in which an injection well 2 having at least two injection ports which include an upper step injection port 22 and a lower step injection port 24 is provided on one edge of a contaminant existence area 6 in soil; a recovery well disposition process in which a recovery well 4 having at least two recovery ports which include an upper step recovery port 42 and a lower step recovery port 44 is provided on other edge of a contaminant existence area 6; and a contaminant recovery process in which liquid containing the chemical is injected from at least the two injection ports which include the upper step injection port 22 and the lower step injection port 24 and liquid containing the chemical is recovered from at least the two recovery ports which include the upper step recovery port 42 and the lower step recovery port 44, and the contaminant is recovered from the upper step recovery port 42 and/or the lower step recovery port 44. COPYRIGHT: (C)2010,JPO&INPIT
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