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Patent Detail: Density-Enhanced Remediation of Dense Non-Aqueous Phase Liquid Contamination of Subsurface Environments

Patent Detail

Superfund Research Program

Density-Enhanced Remediation of Dense Non-Aqueous Phase Liquid Contamination of Subsurface Environments

Number: 6,190,092
Year: 2001
Patent Status: Issued
Authors: Miller, C.T.

A method for remedying contamination of a subsurface environment by a non-aqueous phase liquid that is denser than water (DNAPL). The subsurface environment has a resident aqueous phase and a DNAPL phase. A dense aqueous solution that has a density greater than a density of the DNAPL phase is introduced to the subsurface environment. The dense aqueous solution displaces the resident aqueous phase and causes the DNAPL phase to rise above the greater density aqueous solution. The DNAPL phase is then recovered, which substantially remedies the contamination of the subsurface environment.

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Last Reviewed: April 09, 2025