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Thursday, November 26, 2020 | History

2 edition of Treatment of contaminated soils with aqueous surfacants found in the catalog.

Treatment of contaminated soils with aqueous surfacants

William Ellis

Treatment of contaminated soils with aqueous surfacants

  • 161 Want to read
  • 27 Currently reading

Published by U.S. Environmental Protection Agency, Hazardous Waste Engineering Research Laboratory in Cincinnati, OH .
Written in English

    Subjects:
  • Soil pollution,
  • Hazardous wastes -- United States

  • Edition Notes

    StatementWilliam D. Ellis, James R. Payne and G. Daniel McNabb
    ContributionsPayne, James R, McNabb, G. Daniel, Hazardous Waste Engineering Research Laboratory
    The Physical Object
    Pagination6 p. :
    ID Numbers
    Open LibraryOL14891046M

      We evaluated two nonionic surfactants, one hydrophobic (Brij 30) and one hydrophilic (C12E8), for their ability to enhance the biodegradation of polycyclic aromatic hydrocarbons (PAHs) in contaminated soil after it had been treated in an aerobic bioreactor. The effects of each surfactant were evaluated at doses corresponding to equilibrium aqueous-phase concentrations well above the surfactant. RC Remediation of Soils Contaminated with Wood-Treatment Chemicals (PCP and Creosote) RC Effects of Surfactants on the Bioavailability and Biodegradation of Contaminants in Soils RC Contaminant Binding to the Humin Fraction of Soil Organic Matter.


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Treatment of contaminated soils with aqueous surfacants by William Ellis Download PDF EPUB FB2

Get this from a library. Treatment of contaminated soils with aqueous surfacants. [William Ellis; James R Payne; G Daniel McNabb; Hazardous Waste Engineering Research Laboratory.].

The complete report, entitled "Treatment of Contaminated Soils with Aqueous Surfactants,"{Order No. PB /AS; Cost: $ subject to change) will be available only from: National Technical Information Service Port Royal Road Springfield, VA Telephone: The EPA Project Officer can be contacted at: Hazardous Waste.

So far, the soil washing is one of the few treatment routes which can thoroughly separate heavy metals, organics, and radionuclides from contaminated soils.

Surfactant is a frequently used additive for soil washing or other remedial technologies, such as surfactant-enhanced bioremediation, surfactant-enhanced phytoremediation, and surfactant Cited by: EPA/// November TREATMENT OF CONTAMINATED SOILS WITH AQUEOUS SURFACTANTS by William D. EJJis James R.

Payne G. Daniel McNabb Science Applications International Corporation Westpark Drive McLean, VA Contract No. Project Officer Anthony N. Tafuri Hazardous Waste Engineering Research Laboratory Releases Control.

The overall crude oil removal from the weathered soil sample was in the following order of soils: Soil 4 > Soil 3 > Soil 2 > Soil 1. The enhanced oil removal has been attributed to the displacement of crude oil by surfactant solutions, which was due the scrubbing of contaminated soil surfaces that generates attrition and abrasion [33], [34].Cited by:   Surfactant soil washing was originally developed in petroleum recovery operations.

Surfactants have potential for use in aquifer remediation of DNAPLs. Several factors can influence the efficiency of soil flushing with surfactants. Groundwater that is Treatment of contaminated soils with aqueous surfacants book hard may be detrimental to the effectiveness of a surfactant.

Surfactants can adsorb onto. A few in situ field studies have been performed with surfactants. Large-scale treatment has been done mostly for organic removal.

Soil pH, soil type, cation exchange capacity (CEC), particle size, permeabilities and contaminants all affect removal efficiencies. High clay and organic matter contents are particularly detrimental. Umiea States Environmental Protection Agency Hazardous Waste Engineering Researcn Laooratory Cincinnati OH Researcn and Development EPA//S2 35/ Dec.

oEPA Project Summary Treatment of Contaminated Soils with Aqueous Surfactants William D. Ellis, James R. Payne, and G. Daniel McNabb The full report presents the results, conclusions, and recommendations of a project. In situ soil and groundwater treatment techniques provide a cheaper alternative for total removal of contaminated soil and treatment on remote site.

Some case studies of groundwater clean up and in situ soil treatment are described. Soil flushing is one of the soil remediation technologies which could by applied for treatment of hydrocarbon contaminated soil. Flushing of the contaminated soil samples was carried out by using sodium dodecyl sulfate (SDS) and Triton X surfactant solutions at the concentrations of %, %, %, and % (W/W).

Surfactants are amphiphilic molecules that reduce aqueous surface tension and increase the solubility of hydrophobic organic compounds (HOCs). Surfactant-amended remediation of HOC-contaminated soils and aquifers has received significant attention as an effective treatment strategy – similar in concept to using soaps and detergents as washing agents to remove grease from.

After 4h of treatment with surfactant solution, the diesel soil content remains constant, which shows the existence of a necessary contact time needed to the surfactant to be efficient. form at the back of the book. Treatment of Contaminated Soils with Aqueous Surfactants Decontamination of Groundwater Using Surfactant Solutions The surfactant concentration at time = hours hours for Case 1.

These organic-phase liquids are often sparingly soluble in water, and in the context of soil and sediment contamination are termed non-aqueous phase liquids or NAPLs.

NAPLs such as fuel oil, creosote, gasoline and coal tar are multi-component mixtures that are composed of a broad range of hydrophobic organic compounds (HOCs). EFFICIENCY OF SURFACTANT APPLICATION AS TREATMENT FOR CONTROLLING THE BIO-LEACHING OF HEAVY METAL CONTAMINATED SEDIMENTS /books books Thomas Telford Ltd London /cs Contaminated Soil Contaminated Soil Seventh International FZK/TNO conference on contaminated soil Thomas Telford Ltd London.

Among petroleum-hydrocarbon pollutants, fuel-oil is more difficult to treat compared to gasoline and diesel fuel. The objectives of this bench-scale study were to: (1) develop a two-stage remedial system consisting of surfactant washing followed by Fenton-like oxidation process to remediate fuel-oil contaminated soils; (2) evaluate the effects of residual surfactant and soil organic matter.

Experimental unit (EU) was a glass container with g of dry soil. Tween V R 80 is a liquid nonionic surfactant, of yellow color and with a hydrophilic-lipophilic balance of 15 (Lee et al. The proposed mechanisms involved in surfactant-amended remediation include: lowering of interfacial tension, surfactant solubilization of HOCs, and the phase transfer of HOC from soil-sorbed to pseudo-aqueous phase.

However, as with any proposed chemical countermeasures, there is a concern regarding the fate of the added surfactant. The concentration of chlorinated compounds dissolved from the soil in the surfactant aqueous phase when equilibrium was reached (about mg L-1) is related to the moderate average contamination.

This paper mainly relates to the real polychlorinated biphenyl (PCB)-contaminated soil flushing process, in which an aqueous solution of anionic surfactant was passed through sandy soil having an.

Among many treatment methods practiced for remediation of petroleum-contaminated soils, surfactant-enhanced soil washing has been widely practiced as a preferred treatment. We studied the effects of two polyethoxylated nonionic surfactants, Brij 30 and C 12 E 8, on populations of polycyclic aromatic hydrocarbon- (PAH-) degrading bacteria from a bioreactor treating PAH-contaminated surfactant was evaluated at doses that corresponded to aqueous-phase concentrations both above and below the critical micelle concentration (CMC) after mixing with reactor.

In-Situ Mobilisation of Residual Oil in Contaminated Soil — Development of a Method for Selecting Oil-Mobilising Surfactants. Authors; Authors and affiliations Treatment of Contaminated Soils with Aqueous Surfactants. EPA /S2–85/, Arendt G.

() In-Situ Mobilisation of Residual Oil in Contaminated Soil — Development. Increased desorption of hydrophobic organic compounds (HOCs) from soils and sediments is a key to the remediation of contaminated soils and groundwater. In this study, phenanthrene desorption from a contaminated soil by mixed solutions of a nonionic surfactant (octylphenol polyethoxylate, TX) and an anionic surfactant (sodium dodecylbenzenesulfonate, SDBS) was investigated.

Phenanthrene. Groundwater remediation is the process that is used to treat polluted groundwater by removing the pollutants or converting them into harmless products.

Groundwater is water present below the ground surface that saturates the pore space in the subsurface. Globally, between 25 per cent and 40 per cent of the world's drinking water is drawn from boreholes and dug wells. The combination of surfactant enhanced soil washing and degradation of nitrobenzene (NB) in effluent with persulfate was investigated to remediate NB contaminated soil.

Aqueous solution of sodium dodecylbenzenesulfonate (SDBS, mmol L-1) was used at a given mass ratio of solution to soil () to extract NB contaminated soil ( mg kg The immobilization or removal of toxic components using aqueous extractants, with or without additives, is one of the commonly practiced techniques for the treatment of metal-contaminated soils.

However, rather than the use of water alone, the solution with chemical-additives is preferred due to the less time requirement and better separation.

A key problem of surfactant application for enhanced removal of contaminants by in-situ pump and treat measures is the reduction of soil permeability or clog- ging of contaminated zones.

One strategy to overcome these problems is the adoption of combined polymer surfactant systems to increase the viscosity of the displacing fluid. AFFF contaminated soil and water: risks, remedial options.

Prof Ravi Naidu. 1,2 Aqueous Film Forming Foam (AFFF) – has been widely used for fire-fighting by the military and municipal fire departments. – complex mixtures of fluorocarbon surfactants, hydrocarbon surfactants, and solvents. To help on the solution of this problem, surfactants can be used to clean the contaminated soil and water.

Surfactants are one of the most commonly used chemicals in everyday life. Since the beginning of the 20th century, the production of a wide spectrum of synthetic surfactants from petroleum resources has increased intensively. bioremediation of soil contaminated with used motor oil concept process development and mathematical modeling Posted By J.

Tolkien Media TEXT ID a Online PDF Ebook Epub Library surajudeen abdulsalam isbn from amazons book store everyday low prices and free delivery on eligible orders varoius bioremediation apprpaches were.

Surfactant Enhanced Soil Treatment Michigan State University Description of Research: Dr. Boyd is working on three research projects involving surfactants: Surfactant treatment of soils and sediments Dr Boyd is conducting basic research to study the effects of different classes of surfactants on the partitioning of contaminants between the.

The effect of nonionic polyoxyethylene (POE) surfactants on the solubilization rate of individual polycyclic aromatic hydrocarbons (PAHs) from a weathered, coal tar-contaminated soil obtained from a manufactured gas plant (MGP) site was studied.

The release of PAHs upon surfactant washing were measured with time. Time-varying adsorption of PAHs to Tenax resin was also studied.

Chemical flooding is used primarily to target the removal of source areas of contamination and is less well suited for the remediation of dissolved, sorbed, or volatilized plumes; however, surfactant/cosolvent flooding can be used in conjunction with other technologies, such as multi-phase extraction, bioremediation, or chemical oxidation, to bring a contaminated site to closure (ITRC The influence of the nonionic surfactant Brij 35 on biodegradation of slowly desorbing polycyclic aromatic hydrocarbons (PAHs) was determined in contaminated soils.

We employed a soil originated from a creosote-polluted site, and a manufactured gas plant soil that had been treated by bioremediation.

The two soils differed in their total content in five indicator 3- 4- and 5-ring PAHs ( Ivey-sol Surfactant Technology is comprised of several patented and preparatory non-ionic surfactant formulations that have the unique ability to selectively desorb and liberate sorbed (i.e., absorbed and adsorbed) petroleum hydrocarbons (LNAPL), chlorinated solvents (DNAPL), and certain heavy metal contaminants from soil and fractured bedrock surfaces.

Book Chapter: Illangasekare TH. Flow and entrapment of nonaqueous phase liquids in heterogeneous soil formations. In: Selim HM, Ma L, eds. Physical Nonequilibrium in Soils: Modeling and Application. Boca Raton, FL: CRC Press,Chap pp. RC (Final) Full-text: Google-Chapter Preview-PDF Exit.

Surfactants were selected based on their aqueous solubility, toxicity, and interference with mineral oil analysis. Preliminary results show a good agreement between the residual mineral oil concentration after surfactant extraction and the residual concentration after bench-scale biological treatment of polluted soil.

The treatment of contaminated soil is a permanently relevant subject for ensuirng the quality of the environment. A wide variety of soils contaminated witht a broad range of harmful chemical compounds all around the the world, call for many different treatment strategies.

Chemicals. Phenanthrene (aqueous solubility = mg liter −1 []) and n-hexadecane (solubility = μg liter −1) and their radiolabeled forms ([ C]phenanthrene and [ C]hexadecane) were obtained from Sigma Chemical (St. Louis, Mo.). The purity of both radiolabeled compounds was >98%, and the specific activities were mCi mmol −1 for phenanthrene and mCi mmol −1 for.

Bioremediation of TNT-Contaminated Soil / Hiltrud Lenke, Christof Achtnich, Gregor Daun, Hans-Joachim Knackmuss In Situ Remediation of Contaminated Soils by Bioelectrokinetic Remediation and Other Competitive Technologies / Robert E. Marks, Yalcin B. Acar, Robert J. Gale, Elif Ozsu-Acar Ivey International Inc.

is an international award winning remediation technology and development company that specializes in vapor intrusion, and soil and groundwater contamination treatment. The company has 25 years of experience in developing remediation technologies for air, soil, and groundwater applications.The soil samples were treated separately with aqueous solution of two complexing agents – namely, tiron and glutamic acid to determine the removal efficiency of heavy metals.

Before treatment with the complexing agents, the soils showed remarkably high levels of .