In Situ Mixed Region Vapor Stripping in Low-Permeability Media. 2. Full-Scale Field Experiments

Siegrist, Robert L.; West, O.R.; Morris, M.I.; Pickering, D.A.; Greene, D.W.; Muhr, C.A.; Davenport, Doug D.; Gierke, John S.

doi:10.1021/es00009a008

Cited by 16 publications

(18 citation statements)

References 6 publications

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“…Furthermore, some processes affect other conditions such as temperature or fluid pressures. Although not critical to evaluating treatment performance, monitoring of site conditions outside the treatment region also may provide important data for evaluating treatment performance (Siegrist et al, 1995) and extrapolation of the results to other sites.…”

Section: March/april1997mentioning

confidence: 99%

Increasing implementation of in situ treatment technologies through field‐scale performance assessments

Gierke¹,

Powers²

1997

Water Environment Research

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In situ treatment technologies are important components of subsurface remediation efforts at a wide variety of sites. Too often, however, innovative technologies are not given adequate consideration by consultants, regulators, and site owners due to a lack of conclusive evidence that they will be effective alternatives. Field-scale demonstrations of the efficacy of in situ remediation technologies are important for effective engineering design. These types of projects provide an increase in the accuracy of conceptual models of the governing processes and can elucidate the practical aspects of full-scale implementation. Demonstration projects conducted at the field scale have a number of components necessary for complete assessment of treatment performance. Depending somewhat on the technology, these can include: preand posttreatment sampling, detailed site characterization of stratigraphy and hydrogeology, and comparisons between predictions of engineering models and actual performance. Water Environ. Res., 69, 196 (1997).

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Section: March/april1997mentioning

confidence: 99%

Increasing implementation of in situ treatment technologies through field‐scale performance assessments

Gierke¹,

Powers²

1997

Water Environment Research

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“…Barton et al 1992;Fan and Scow 1993). Many remediation technologies have been developed, such as biodegradation and vacudvapor extraction followed by adsorption with activated carbon (Brown 1992;Diguilio 1992;Hinchee 1994;Siegrist et al 1995). Although these technologies each exhibited varying degrees of success, none of them has proven to be entirely satisfactory because of their low efficiency, the production of unwanted toxic by-products, or secondary waste-operation requirements (Fiorenza et al 1991;Gibson et al 1993;Siegrist and van Ee 1994).…”

Section: Reaction Kinetics Between Chloroform and 2 Mnaoh At 100°c Anmentioning

confidence: 99%

Alkaline dechlorination of chlorinated volatile organic compounds

Gu¹,

Siegrist²

1996

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This report was prepared a an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The view and opinions of authors expressed herein do not necessarily state or reflect those of the UnitedStatesGovernment or any agency thereof.

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“…In terms of remediation, in situ stabilization has been used to immobilize contaminants via the addition of pozzolanic materials, such as cement, lime, and fly or bottom ashes (Day and Ryan 1995). More recently, in situ soil mixing techniques have been further refined to remove contaminant mass via delivery of reactive media (Day et al 1999) or by stripping using air or steam (Siegrist et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Chlorinated Solvent Source‐Zone Remediation via ZVI‐Clay Soil Mixing: 1‐Year Results

Olson¹,

Sale²,

Shackelford³

et al. 2012

Groundwater Monitoring Rem

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ZVI‐Clay is an emerging remediation approach that combines zero‐valent iron (ZVI)‐mediated degradation and in situ stabilization of chlorinated solvents. Through use of in situ soil mixing to deliver reagents, reagent‐contaminant contact issues associated with natural subsurface heterogeneity are overcome. This article describes implementation, treatment performance, and reaction kinetics during the first year after application of the ZVI‐Clay remediation approach at Marine Corps Base Camp Lejeune, North Carolina. Primary contaminants included trichloroethylene, 1,1,2,2‐tetrachloroethane, and related natural degradation products. For the field application, 22,900 m3 of soils were treated to an average depth of 7.6 m with 2% ZVI and 3% sodium bentonite (dry weight basis). Performance monitoring included analysis of soil and water samples. After 1 year, total concentrations of chlorinated volatile organic compounds (CVOCs) in soil samples were decreased by site‐wide average and median values of 97% and >99%, respectively. Total CVOC concentrations in groundwater were reduced by average and median values of 81% and >99%, respectively. In several of the soil and groundwater monitoring locations, reductions in total CVOC concentrations of greater than 99.9% were apparent. Further reduction in concentrations of chlorinated solvents is expected with time. Pre‐ and post‐mixing average hydraulic conductivity values were 1.7 × 10−5 and 5.2 × 10−8 m/s, respectively, indicating a reduction of about 2.5 orders of magnitude. By achieving simultaneous contaminant mass depletion and hydraulic conductivity reduction, contaminant flux reductions of several orders of magnitude are predicted.

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In Situ Mixed Region Vapor Stripping in Low-Permeability Media. 2. Full-Scale Field Experiments

Cited by 16 publications

References 6 publications

Increasing implementation of in situ treatment technologies through field‐scale performance assessments

Increasing implementation of in situ treatment technologies through field‐scale performance assessments

Alkaline dechlorination of chlorinated volatile organic compounds

Chlorinated Solvent Source‐Zone Remediation via ZVI‐Clay Soil Mixing: 1‐Year Results

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