The application of density controlled flooding solutions for remediation

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Authors:Falta, Ronald W.; Brame, Scott E.; Roeder, Eberhard
Author Affiliations:Primary:
Clemson University, Department of Geological Sciences, Clemson, SC, United States
Volume Title:Geological Society of America, 1997 annual meeting
Source:Abstracts with Programs - Geological Society of America, 29(6), p.74; Geological Society of America, 1997 annual meeting, Salt Lake City, UT, Oct. 20-23, 1997. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0016-7592
Publication Date:1997
Note:In English
Summary:Selectively controlling the density of remedial flooding mixtures to target specific zones of contamination is a promising new application of cosolvent flooding, especially with regard to Dense, Non-Aqueous Phase Liquids (DNAPLs). Since most of the more desirable cosolvents are alcohol based and have a density less than water, the delivery of these cosolvents to specific contaminated regions can be a challenge. By selectively increasing and/or decreasing the density of these cosolvent mixtures, the cosolvent mixture can be efficiently delivered to the targeted zone of contamination. This approach can be used for both enhanced dissolution and mobilization processes. A critical facet of cosolvent flooding is the phase behavior between the cosolvent and the organic contaminant. By selecting the appropriate cosolvent mixture and carefully controlling its density, it is possible to reduce the density of a pooled DNAPL and mobilize it to an extraction well while minimizing the potential for increased downward migration. A variety of density manipulation and mobilization scenarios are being investigated. Column and 2-D tank experiments supported by compositional, multiphase numerical simulations have been performed. These are being used to design a variable density cosolvent flood to remediate a DNAPL spill in an aquifer isolated by sheetpile at Dover Air Force Base in Delaware next year.
Subjects:Applications; Aquifers; Controls; Dense nonaqueous phase liquids; Density; Design; Experimental studies; Ground water; Movement; Nonaqueous phase liquids; Numerical analysis; Pollutants; Pollution; Remediation; Simulation; Solution; Two-dimensional models; Water wells; Atlantic Coastal Plain; Delaware; Dover Air Force Base; Kent County Delaware; United States
Record ID:1998051510
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
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