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Saturday, July 25, 2020 | History

4 edition of Enhanced removal of residual DNAPL with hot water injection found in the catalog.

Enhanced removal of residual DNAPL with hot water injection

Andrew Bjorn

Enhanced removal of residual DNAPL with hot water injection

by Andrew Bjorn

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  • 31 Currently reading

Published by National Library of Canada in Ottawa .
Written in English


Edition Notes

Thesis (M.A.Sc.) -- University of Toronto, 2000.

SeriesCanadian theses = -- Thèses canadiennes
The Physical Object
FormatMicroform
Pagination2 microfiches : negative. --
ID Numbers
Open LibraryOL21316165M
ISBN 100612533697
OCLC/WorldCa50754903

  The potential for nonaqueous phase liquid (NAPL) mobilization is one of the most important considerations in the development and implementation of surfactant-based remediation technologies. Column experiments were performed to investigate the onset and extent of tetrachloroethylene (PCE) mobilization during surfactant flushing. To induce mobilization, the interfacial tension between residual Martel, R., Gélinas, P., and Laurent, S., “In situ recovery of DNAPL in sand aquifers: clean-up test using surfactants at Thouin Sand Quarry,” presented at the 5th Annual Symposium on Ground-water and Soil Remediation, Toronto, Ontario Canada, Oct. 2–6, Google Scholar

Kueper BH, Redman D, Starr RC, Reitsma S, Mah M. A field experiment to study the behavior of tetrachloroethylene below the water table: Spatial distribution of residual and pooled DNAPL. Ground Water – CrossRef Google Scholar Assessment of residual dense non-aquous phase liquid (DNAPL) Enhanced injection with fracturing increases the access to contaminants stability and mobility in water, affinity for DNAPL and at the same time maintain reactivity with contaminants.

  the removal of chlorinated solvents from the vadose zone (Relander et al., ). The clean-up process can be enhanced by thermal remediation techniques such as steam injection, which has proved to be particularly effective due to the high energy injection rate and the ability of steam to displace pore fluids even in saturated soils (Udell, )   Enhanced oxidation process for removal of water and soil contaminants In bleaching clothes the oxidizing agent is applied at low concentration in hot water while in ground water treatment of chemicals, the concentrations of the oxidizing agent used are higher at the point of treatment and are in cold water. the use of iron as a catalyst


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Enhanced removal of residual DNAPL with hot water injection by Andrew Bjorn Download PDF EPUB FB2

Enhanced Removal of Residual DNAPL with Hot Water Injection Masters of Applied Science, Andrew Michael Bjorn Department of Civil Engineering Universiîy of Toronto Abstract An esperimental cell and remediation system were designed to analyze hot water flushing of residual dense nonaqueous phase liquids (DNAPLs).

layer on top of a low permeable clay layer. At the site, the removal of the DNAPL is urgently needed. As the boiling temperature of CS2 is approx. 46°C, in-situ volatilisation of the DNAPL is possible with hot water flushing. Injection of hot water, at 75°C, causes the DNAPL to dissolve and :// Technical Report for Surfactant-Enhanced DNAPL Removal at S Marine Corps Base Camp Lejeune, North Carolina The CROW hot-water injection technology was demonstrated at the Brodhead Creek Superfund site in Stroudsburg, PA, over a month period.

and investigations revealed that a seasonal high water table contacted sorbed residual Full-Scale Removal of DNAPL Constituents Using Steam-Enhanced Extraction and Electrical Resistance Heating G. Heron, S. Carroll, and S.

Nielsen. Ground Water Monitoring & Remediation, Vol 25 No 4, pDiscusses the full-scale remediation of Area A of the Northeast Site at the Young-Rainey STAR Center, Largo, :// Once DNAPL is identified below the water table, slow dissolution and pumping of the contaminated water is the baseline cleanup strategy.

New cleanup approaches based on enhanced removal by surfactants and/or alcohols have been proposed and tested at the pilot ://metadc/m2/1/high_res_d/pdf.

Remediation of DNAPL-contaminated sites with surfactants involves injection of a solution of water plus surfactant into the source zone and removal of the DNAPL through a combination of dissolution and displacement (see Figure ).

The relative importance of dissolution compared to displacement can be controlled by formulation of the The issues important for this technique to succeed in the field are (i) biodegradability and cost effectiveness of the surfactants, (ii) surfactant loss due to adsorption, (iii) vertical migration of residual DNAPL due to low interfacial tension, (iv) ease of separation of organics from water above ground before re-injection of :// Enhanced Treatment of DNAPLs Contaminated Soils and Groundwater Using Biosurfactants: In-Situ Bioremediation EPA Grant Number: RC Subproject: this is subproject numberestablished and managed by the Center Director under grant R (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).

ITRC - DNAPL Source Reduction Facing the Challenge April In Situ Chemical Flushing. In situ chemical flushing describes an approach to enhanced DNAPL removal involving the injection and subsequent extraction of chemicals to solubilize and/or mobilize DNAPLs. The chemicals are injected into a system of wells designed to "sweep" the DNAPL zone The steam enhanced removal of VOCs and SVOCs prior to stabilization reduces both long term risk and overall cement dosing requirements, while at the same time documenting the mass of removal of contaminants.

Overviews of the technology applied at two sites (LNAPL and DNAPL) will be :// DNAPL removal from a heterogeneous alluvial aquifer by surfactant-enhanced aquifer remediation. Ground Water Monit Remediation 21(4) Crossref, Google Scholar; Lunn SRD, Kueper BH. Manipulation of density and viscosity for the optimization of DNAPL recovery by alcohol flooding.

J Contam Hydrol Crossref, Google Scholar   Progress 10/01/98 to 09/30/04 Outputs Many soils and aquifers in the country are contaminated with dense non-aqueous phase liquids (DNAPLs) such as chlorinated hydrocarbons, many of which are classified as carcinogens.

These liquids have a density greater than and are immiscible with water, i.e., they co-exist as two separate liquids. Upon entrance into the soil and/or aquifers, these   Characterization and removal of DNAPL from sand and clay layered media after flushing the original PCE out of the column with alcohol followed by water.

The residual saturation for the clay-mix media ranged from 12% to 17%. F.J. Holzmer, G.A. Pope, L. YehSurfactant-enhanced aquifer remediation of PCE-DNAPL in low permeability sands.

G.B Big Data and Machine Learning in Water Sciences: Recent Progress and Their Use in Advancing Science; Early Results: Juno at Jupiter; Atmosphere-ice-ocean-ecosystem processes in a thinner Arctic sea ice regime: the Norwegian young sea ICE cruise (N-ICE) A Census of Atmospheric Variability from Seconds to Decades   Hot water flushing, therefore, did not result in reduced residual NAPL saturations relative to cold water flushing under the conditions investigated in this study.

Model simulations successfully predicted overall cold water flushing NAPL removal but over predicted hot water flushing NAPL removal except at the very end of the :// Surfactant-Enhanced DNAPL Remediation: Surfactant Selection, Hydraulic Efficiency, and Economic Factors contaminant in aquifer to water removal rate — lb/gpm).

(Sabatini and Knox, ), 0 @article{osti_, title = {Removal of carbon tetrachloride from a layered porous medium by means of soil vapor extraction enhanced by desiccation and water table reduction}, author = {Oostrom, Mart and Dane, J H and Wietsma, Thomas W}, abstractNote = {A two-dimensional flow cell experiment was conducted to study the removal of the carbon tetrachloride component of a DNAPL mixture from a   Other in-situ thermal methods such as hot water flooding, hot air sparging, radio-frequency and microwave heating are not in common commercial use and will not be discussed further.

Remediation Mechanisms for CVOC Contaminants For thermal treatment of VOC DNAPL papers/paperpdf. For example, most DNAPL studies rely on traditional soil and water sampling and the fortuitous observation of immiscible solvent.

Once DNAPL is identified, soil excavation (which is only applicable to small contained spill sites) is the only "proven" cleanup method. New cleanup approaches based on enhanced removal by surfactants and/or://metadc/m2/1/high_res_d/pdf.

Short-term remediation included removal of EDC DNAPL (dense nonaqueous phase liquid) by dredging and vacuuming the ditch, and by dredging the river where the ditch discharged. EDC saturation in shallow impacted sediments located beneath the ditch was at or below residual saturation and these sediments were therefore left in ://.

Results show that greater than 90% removal of the total DNAPL mass (including both pools and associated residuals) is possible. surfactants, hot water, or steam. Mobilization of residual   DNAPL phase and DNAPL adsorbed phase due to ambient temperature of soil and groundwater. This process will continuously occur until it reaches the extraction well (EPA, ).

The removal mechanism which enhanced DNAPL remediation during steam-enhanced extraction is physical displacement, temperatures, steam distillation   Lecture Session (LeS): E Modelling DOMINATING PROCESSES DURING DNAPL REMOVAL FROM THE SATURATED ZONE USING THERMAL WELLS Uwe Hiester, Martina Müller, Oliver Trötschler, Hans-Peter Koschitzky, VEGAS – Research Facility for Subsurface Remediation, Universität Stuttgart, papers/