Patent ID: 6041863
Filing Date: 2000-03-28
Classification: B09C

Abstract:
A method of passive remediation of DNAPL'S from a groundwater remediation well, comprising the steps of:providing a passive absorptive device having an elongated body surrounded in parts by an inflatable covering that has an outer layer of DNAPL-philic hydrophobic material;providing inflation means for inflating the inflatable covering;inserting the passive absorptive device in the groundwater remediation well and lowering the passive absorptive device to a given location;inflating the inflatable covering by use of the inflation means to compress the DNAPL-philic hydrophobic layer against the wall of the groundwater remediation well;following an extended lapse of time to allow the DNAPL-philic hydrophobic layer to soak up DNAPL seepage at the wall of the groundwater remediation well, deflating the inflatable covering to slacken the compression of the DNAPL-philic hydrophobic layer against the wall of the groundwater remediation well; and,retrieving the passive absorptive device from the groundwater remediation well so that the DNAPL soaked in the DNAPL-philic hydrophobic layer can be safely disposed of.