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Density modification displacement to remediate contaminated aquifers

  • US 6,099,206 A
  • Filed: 04/07/1998
  • Issued: 08/08/2000
  • Est. Priority Date: 04/07/1998
  • Status: Expired due to Fees
First Claim
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1. A method for remediation of an aquifer contaminated by a non-aqueous phase liquid (NAPL) including a dense non-aqueous phase liquid (DNAPL) comprising the steps of:

  • a. modifying the density of the DNAPL by flushing the aquifer with an alcohol the flushing of the aquifer with the alcohol serving to partition the alcohol into the NAPL phase resulting in a NAPL phase which is less than water; and

    b. displacing the NAPL by flushing the aquifer with a surfactant.

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