Grantee Research Project Results
1998 Progress Report: Partitioning Tracers for In-Situ Detection and Measurement of Nonaqueous Phase Liquids in Porous Media
EPA Grant Number: R825407Title: Partitioning Tracers for In-Situ Detection and Measurement of Nonaqueous Phase Liquids in Porous Media
Investigators: Brusseau, Mark
Institution: University of Arizona
EPA Project Officer: Hahn, Intaek
Project Period: November 1, 1996 through October 31, 1999
Project Period Covered by this Report: November 1, 1997 through October 31, 1998
Project Amount: $246,339
RFA: Environmental Fate and Treatment of Toxics and Hazardous Wastes (1996) RFA Text | Recipients Lists
Research Category: Hazardous Waste/Remediation , Land and Waste Management , Safer Chemicals
Objective:
The overall goal of this proposed project is to explore the use of partitioning tracers to characterize light nonaqueous phase liquids (LNAPLs) in aquifer systems. It is specifically focused on the effects of mass transfer rate limitations and of porous-media heterogeneity on the efficacy of partitioning tracers.Progress Summary:
We have made progress along several fronts, as outlined below:1. Testing and Evaluation of Alternative Partitioning Tracers. We continue to investigate possible candidates for use as partitioning tracers. This entails conducting batch and column experiments to evaluate performance.
2. Analysis of the Influence of Biodegradation, Heterogeneity, and Mass Transfer on Efficacy of the Partitioning Tracer Method. We have conducted detailed analyses of data sets collected from previous field-scale partitioning tracer tests. As part of these analyses, we have examined the impact of porous-media heterogeneity, liquid-liquid mass transfer, and biodegradation on the performance of the method. This work has resulted in one manuscript currently in review and one in preparation.
3. Development of Mathematical Models. We are developing an "advanced" mathematical model to describe the transport of tracers in heterogeneous systems. The model explicitly incorporates multiple mass-transfer processes at multiple scales. Two manuscripts are currently in preparation based on this work.
Future Activities:
Effective risk assessment and remediation of LNAPL-contaminated sites is limited by current site characterization techniques. This research project involves an integrated approach for the testing of a new, promising method for characterizing LNAPLs in aquifer systems. The efficacy of this new method must be evaluated before it can be applied to real problems. Specifically, the influence of potential constraining factors on its performance must be elucidated. 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 on this Report : 3 Displayed | Download in RIS Format
| Other project views: | All 7 publications | 3 publications in selected types | All 3 journal articles |
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Cain RB, Johnson GR, McCray JE, Blanford WJ, Brusseau ML. Partitioning tracer tests for evaluating remediation performance. Ground Water 2000;38(5):752-761. |
R825407 (1998) R825407 (1999) R825407 (Final) |
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Li Z, Brusseau ML. Nonideal transport of reactive solutes in heterogeneous porous media 6. Microscopic and macroscopic approaches for incorporating heterogeneous rate-limited mass transfer. Water Resources Research 2000;36(10):2853-2867. |
R825407 (1998) R825407 (1999) R825407 (Final) |
not available |
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Nelson NT, Oostrom M, Wietsma TW, Brusseau ML. Partitioning tracer method for the In Situ measurement of DNAPL saturation: influence of heterogeneity and sampling method. Environmental Science & Technology 1999;33(22):4046-4053. |
R825407 (1998) R825407 (1999) R825407 (Final) |
Exit Exit |
Supplemental Keywords:
groundwater, soil, chemical transport, risk assessment, chemicals, solvents, NAPL, remediation, cleanup, hydrology, measurement methods., RFA, Scientific Discipline, Waste, Ecosystem Protection/Environmental Exposure & Risk, Health Risk Assessment, Environmental Chemistry, Remediation, Chemistry, Fate & Transport, Hazardous Waste, Hazardous, hazardous waste treatment, fate and transport, oils spills, fate and transport , NAPL, contaminant transport, risk characterization, chemical speciation, transport contaminants, partitioning tracers, adverse human health affects, chemical contaminants, ecological impacts, hazardous chemicals, porous media, contaminant transport models, restoration planningProgress 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.