ON-SITE REDUCTION METHOD OF SOLUBLE AND INSOLUBLE HEAVY METALS AND ORGANOHALOGEN COMPOUND BY PNEUMATIC FRACTURING ACCOMPANIED BY INJECTION OF IRON POWDER FOR REMEDIATING CONTAMINATED SOIL AND UNDERGROUND WATER

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive and permanent new remediation method capable of collectively detoxify heavy metals and organohalogen compd. in contaminated underground water on the spot. ;SOLUTION: A boring hole 1 is digged into contaminated soil and a ground surface is sealed to blow compressed air into the ground to generate a fracture 2 in a weak ground part. At the same time as this operation or subsequently, an iron powder is blown into the ground from the ground surface by compressed air to form an iron powder dispersed layer 4 to the fracture 2. Contaminated penetrating water 5 passes through the iron powder dispersed layer 4 and comes into contact with the iron powder to be detoxified and permeated underground water 6 is received in the pit part 3 of the bottom part of the boring hole 1.;COPYRIGHT: (C)1998,JPO