Technology Status Report: In Situ Flushing - CLU-IN

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In Situ Flushing Project Summaries GWRTAC Case Study Database "Surfactant Flushing Research to Remove Organic Liquids from Aquifers," Ground Water Currents, March 1994. EPA 542-N-92-002. "Surfactants Can Trap, Untrap Contaminants" Centerpoint, 1 (2) 1993. (A publication of the HSRCs). "Surfactant-Enhanced Solubilization of Residual Dodecane From Soil Columns 1. Experimental Investigation, 2. Modeling Investigation" Environmental Science & Technology, 27, 1993, p 2332- 2351 "Surfactant-Enhanced Remediation of Soil Columns Contaminated by Residual Tetrachloroethylene," Journal of Contaminant Hydrology, 16, 1994, p 35-53. U.S. Environmental Protection Agency (EPA), April 1995: Status Report: Surfactant Enhancements, EPA 542-K-94-003, U.S. EPA OSWER (5102W), TIO, Washington, DC, avail. at www.gwrtac.org Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 94 of 164 Copyright GWRTAC 1998 Revision 1 Tuesday, November 17, 1998
In Situ Flushing Project Summaries GWRTAC Case Study Database GWRTAC ID: FLSH0046 Project Name: Purdue University - Phototransformations of PCBs in Micellar City: West Lafayette State/Province: IN Primary GWRTAC Personal Communication Source (Name/Organization): Report(s)/Publication(s) (GWRTAC Source): U.S. EPA Technology Innovation Office Technology Information Summary Report, Aug. 1-15, 1998, page 7. Project Summary: The following was excerpted from U.S. EPA Technology Innovation Office Technology Information Summary Report, Aug. 1-15, 1998, page 7: This paper discusses photolysis as a destructive process for polychlorinated biphenyls (PCBs) extracted from soils with surfactant solutions. Photodechlorination may eliminate the need to physically separate these contaminants from the washing solution. Photochemical reactions of the PCB congener mixture, Aroclor 1254, and the specific congener, 2,3,4,5-tetrachlorobiphenyl (2,3,4,5-TeCB), were investigated in aqueous solutions containing surfactant micelles with UV light at 253.7 nm. The main decay pathway in which lesser chlorinated congeners were formed as intermediates was shown to be photoreduction through photodechlorination. The quantum yield for decay of 0.1µ M 2,3,4,5-TeCB in 0.5 mM Brij 58 micellar solutions was over six times greater than in water alone. Surfactant loss to the soil proved to be the limiter for sequential extraction from a soil and photoreduction of 2,3,4,5-tetrachlorobiphenyl by Brij 58 solutions. Report(s)/Publication(s) (Additional Information Sources): Chu, Wei, Chad T. Jafvert, Claude A. Diehl, Karen Marley, Richard A. Larson, 1998: "Phototransformations of Polychorobiphenyls in Brij 58 Micellar Solutions", in Environmental Science and Technology, Vol. 32, No. 13, pp. 1989-1993, July 1, 1998. Ground-Water Remediation Technologies Analysis Center Operated by Concurrent Technologies Corporation Appendix - Page 95 of 164 Copyright GWRTAC 1998 Revision 1 Tuesday, November 17, 1998
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Technology Status Report Technology
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ABSTRACT This technology status rep
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LIST OF TABLES Table Title Page 1 I
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1.0 INTRODUCTION / PURPOSE OF STATU
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a laboratory-scale project. As illu
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3.1 Flushing Solutions 3.0 ANALYSIS
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(approximately eight) full-scale pr
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Table 1. In Situ Flushing - Summary
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Table 3 In Situ Flushing - Geology
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Table 4 In Situ Flushing - Recovere
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Full-Scale/Commercial 26% Figure 2.
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Site Remediation 25% Figure 4. In S
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NAPL Removal 34% Figure 6. In Situ
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Figure 8. In Situ Flushing - Distri
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Number of Projects 35 30 25 20 15 1
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Number of Case Studies 45 40 35 30
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25 ft and 50 ft and 10 ft and 100 f
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Unconfined Aquifer 65% Figure 16. I
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In Situ Flushing Project Summaries
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