| Title: | A field trial to assess the performance of CO2-supersaturated water injection for residual volatile LNAPL recovery |
| Author(s): | Nelson L; Barker J; Li T; Thomson N; Ioannidis M; Chatzis J; |
| Address: | "Ontario Ministry of the Environment, 331 - 435 James St S, Thunder Bay, ON, Canada P7E 6S7. leifcnelson@gmail.com" |
| DOI: | 10.1016/j.jconhyd.2009.08.002 |
| ISSN/ISBN: | 1873-6009 (Electronic) 0169-7722 (Linking) |
| Abstract: | "A pilot scale field trial was conducted to evaluate the recovery of volatile, light non-aqueous phase liquids (LNAPLs) using a novel remediation method termed supersaturated water injection (SWI). SWI uses a patented technology to efficiently dissolve high concentrations of CO(2) into water at elevated pressures. This water is injected into the subsurface resulting in the nucleation of CO(2) bubbles at and away from the injection point. The nucleating bubbles coalesce, rise and volatilize residual LNAPL ganglia. In this study, an LNAPL composed of 103 kg of volatile pentane and hexane, and 30 kg of non-volatile Soltrol was emplaced below the water table at residual saturation. The SWI technology removed 78% of the pentane and 50% of the less volatile hexane. Contaminant mass was still being removed when the system was shut down for practical reasons. The mass removed is comparable to that expected for air sparging but a much smaller volume of gas was injected using the SWI system" |
| Keywords: | Carbon Dioxide/*chemistry Pilot Projects Soil/analysis Volatile Organic Compounds/*chemistry Volatilization Water Pollutants/*chemistry Water Purification/*methods; |
| Notes: | "MedlineNelson, Leif Barker, James Li, Tom Thomson, Neil Ioannidis, Mario Chatzis, John eng Evaluation Study Research Support, Non-U.S. Gov't Netherlands 2009/09/08 J Contam Hydrol. 2009 Oct 13; 109(1-4):82-90. doi: 10.1016/j.jconhyd.2009.08.002. Epub 2009 Aug 15" |
