Grantee Research Project Results
1999 Progress Report: Dissolution Dynamics of Multiple Component NAPLs In Aqueous and Surfactant/Cosolvent Systems
EPA Grant Number: R827112Title: Dissolution Dynamics of Multiple Component NAPLs In Aqueous and Surfactant/Cosolvent Systems
Investigators: Brusseau, Mark
Institution: University of Arizona
EPA Project Officer: Aja, Hayley
Project Period: September 1, 1998 through August 31, 2001 (Extended to December 20, 2002)
Project Period Covered by this Report: September 1, 1998 through August 31, 1999
Project Amount: $362,453
RFA: Exploratory Research - Physics (1998) RFA Text | Recipients Lists
Research Category: Land and Waste Management , Air , Safer Chemicals
Objective:
The overall goal of the proposed research is to enhance our understanding of the dissolution of non-ideal, multiple-component, nonaqueous phase (immiscible) organic liquids (NAPLs) in subsurface systems. The specific objectives include:- Investigate the effect of NAPL composition-dependent factors on dissolution of multiple-component NAPLs in groundwater.
- Investigate the effect of NAPL mass-transfer limitations on dissolution of multiple-component NAPLs in groundwater.
- Investigate the effect of NAPL composition and mass-transfer limitations on the enhanced dissolution of multiple-component NAPLs caused by solubilization agents.
Progress Summary:
We have made progress along several fronts, as outlined below.- We are completing a series of batch experiments to investigate the ideality of dissolution behavior measured for a multiple-component NAPL system containing either water or a surfactant. Specifically, this research is investigating the equilibrium solubilization behavior of two- and three-component NAPL mixtures (containing akylbenzenes) in water and biosurfactant solutions.
- We are initiating a series of column experiments designed to examine multiple-component NAPL dissolution behavior under dynamic flow conditions. We are using the same three-component NAPL system described above, using water and biosurfactant solutions.
- We are continuing to develop and apply mathematical models to describe NAPL dissolution and component transport.
Future Activities:
Effective risk assessment and remediation of NAPL-contaminated sites is limited by our current lack of understanding regarding the dissolution behavior of multiple-component NAPLs. The results of our project research are contributing to the resolution of these issues. We plan to continue to pursue the focal points identified above.Journal Articles:
No journal articles submitted with this report: View all 11 publications for this projectSupplemental Keywords:
groundwater, soil, chemical transport, risk assessment, chemicals, solvents, NAPL, remediation., RFA, Scientific Discipline, Water, Geographic Area, Waste, Ecosystem Protection/Environmental Exposure & Risk, Physics, Environmental Chemistry, Remediation, Restoration, State, chemical mixtures, Aquatic Ecosystem Restoration, Engineering, Chemistry, & Physics, Groundwater remediation, groundwater recharge, NAPL, aquifer flushing, Utah (UT), mass transfer, dissolution dynamics, aquifer remediation design, alternative cleanup standards, soil and groudwater remediation, aquatic ecosystems, groundwater contamination, surfactants, cosolvent systems, NAPLsProgress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.