Laboratory investigation of dense non-aqueous phase liquid migration and remediation in mixed wettability soils monitored by pressure transducers

It appears your Web browser is not configured to display PDF files. Download adobe Acrobat or click here to download the PDF file.

Click here to download the PDF file.


Roberge-Butcher, Michelle Denise




A series of dense non-aqueous phase liquid (DNAPL) spills was conducted in a two-dimensional sand box filled with a variety of media. At the conclusion of the spill, the soil underwent remediation via a waterflood followed by a surfactant flush. Pressure data recorded during the experiments confirmed that DNAPL will be drawn into NAPL-wet lenses and result in negative capillary pressures. The waterflood had little impact on the NAPL distribution. The surfactant flush did reduce the DNAPL-water interfacial tension allowing some of the DNAPL to drain from the NAPL-wet lenses; however a NAPL-saturated layer remained at the bottom of the lenses. It was hypothesized that thickness of the NAPL-saturated layer that remained reflects the capillary pressure difference between the reduced NAPL-entry pressure of the hydrophilic soil below the lens and the reduced water-entry pressure that would allow the DNAPL to drain and water to enter the hydrophobic sand.


Engineering - Environmental




Carleton University

Thesis Degree Name: 

Master of Applied Science: 

Thesis Degree Level: 


Thesis Degree Discipline: 

Engineering, Environmental

Parent Collection: 

Theses and Dissertations

Items in CURVE are protected by copyright, with all rights reserved, unless otherwise indicated. They are made available with permission from the author(s).