Solubilization and Mobilization of Perchloroethylene by Cosolvents in Porous Media
Abstract
Batch equilibrium studies conducted for perchloroethylene (PCE)/cosolvent systems determined that the log-linear solubility relationship is not a completely accurate method to predict solubility of PCE in cosolvent mixtures over an entire range of volume fractions. Batch studies resulted in cosolvency powers of 3.73 and 4.13 for ethanol and isopropanol, respectively. However, log-linear predictions may be adequate for estimations necessary for remediation efforts. The use of the Extended Hildebrand model is recommended. The interfacial tension (IFT) resulting from cosolvent mixtures when compared to the initial volume fraction of cosolvent showed a relationship, similar to the log-linear model. An "IFT reduction power" was determined for ethanol to be -3.60, and isopropyl alcohol, -5.80, describing the ability of cosolvents to reduce IFT with increasing volume fraction. IFT values are accurately estimated by PCE solubility in regimes conducive to cosolvent flushing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 28, 1999
- Accession Number
- ADA366367
Entities
People
- Michael E. Van Valkenburg
Organizations
- University of Florida