trichloroethene dechlorination Articles

  • Pilots to enhance trichloroethene reductive dechlorination and ferrous sulfide abiotic transformation

    Two field pilots are being conducted at Altus Air Force Base (AFB), Oklahoma in areas with high levels of sulfate and iron. An edible oil emulsion was injected into these pilots to promote biological reductive dechlorination of trichloroethene (TCE) and to stimulate ferric sulfide and ferric disulfide production and the abiotic reaction with TCE. Within the injection zone of the larger SS-17 ...


    By Terra Systems, Inc. (TSI)

  • Implementing and Interpreting the Full Scale Zero Valent Iron and Anaerobic Reductive Dechlorination of Trichloroethene

    ABSTRACT: Enhanced reductive dechlorination and micro-scale zero valent iron injections were implemented to treat chlorinated volatile organic compounds at a former manufacturing facility in eastern Pennsylvania.  These remedial approaches, commonly implemented as stand alone technologies, were combined to achieve synergistic reductions of trichloroethene and its reaction products.  The ...

  • Anaerobic Bioremediation of Trichloroethene at Duluth International Airport

    Untitled Document ABSTRACT: A pilot-study for treatment of trichloroethene (TCE) and dechlorination products, dichloroethene (DCE) and vinyl chloride (VC), is ...


    By REGENESIS

  • In Situ Dechlorination of TCE during Aquifer Heating

    Laboratory and field efforts were undertaken to examine trichloroethene (TCE) dechlorination as a function of temperature as an aquifer is heated to temperatures approaching boiling. Experiments were conducted using sediment samples and during electrical resistance heating (ERH) treatment at the East Gate Disposal Yard (Fort Lewis, Washington), which contains nonaqueous phase TCE and hydrocarbon ...


    By TRS Group, Inc.

  • Biotic and abiotic anaerobic transformations of trichloroethene and cis-1,2-dichloroethene in fractured sandstone

    A fractured sandstone aquifer at an industrial site in southern California is contaminated with trichloroethene (TCE) and cis- 1,2-dichloroethene (cis-DCE) to depths in excess of 244 m. Field monitoring data suggest thatTCEis undergoing reduction to cis- DCE and that additional attenuation is occurring. However, vinyl chloride (VC)andethenehavenotbeendetected in significant amounts, so that if ...


    By Hargis + Associates Inc

  • EOS Permeable reactive barriers successfully treat a large Trichloroethene plume - Case Study

    Historical use of trichloroethene (TCE) and other chlorinated solvents at a former au-tomotive parts manufacturing plant in Indiana resulted in a large groundwater plume, stretching approximately 2 miles from the site. TetraTech GEO evaluated sev-eral remedial alternatives and selected enhanced in situ bioremediation to reduce contaminant concentrations and eliminate continued plume migration at ...


    By EOS Remediation, LLC

  • Enhanced CAH Dechlorination using Slow and Fast Releasing Polylactate Esters

    In the mid-1990s, CDM began aggressive discussions with the regulatory agency to reduce regulatory and operational requirements at two sites in Santa Clara, CA -- TR W Microwave and Anadite Santa Clara. Both sites began usingtetrachloroethene (PCE) and trichloroethene (TCE) in manufacturing activities in the mid-1960s. Soil and groundwater were contaminated with PCE, TCE, and daughter products ...


    By REGENESIS

  • Laboratory Studies Using edible oils to support reductive dechlorination

    In laboratory microcosm tests, single additions of corn oil, beef tallow, melted corn oil margarine, coconut oil, corn oil, soybean oil, or partially hydrogenated soybean oil supported complete reductive dechlorination of perchloroethene (PCE) or trichloroethene (TCE) to ethene when a dechlorinating population was present. TOC production from the edible oils continued for up to 200 days. More ...


    By Terra Systems, Inc. (TSI)

  • Bioaugmentation for accelerated in-situ anaerobic bioremediation

    A successful anaerobic bioaugmentation was carried out on a trichloroethene (TCE)-contaminated aquifer at Dover Air Force Base, DE, using a microbial enrichment culture capable of dechlorinating TCE to ethene. A hydraulically controlled pilot system 12   18 m was constructed 15 m below ground surface in an alluvial aquifer to introduce nutrients and substrate into the groundwater. ...


    By Terra Systems, Inc. (TSI)

  • In Situ Bioremediation of Chlorinated Solvents: A Case Study

    In situ bioremediation is ongoing at a former manufacturing facility in Portland, Oregon. Shallow groundwater at the site was impacted by chlorinated solvents, primarily trichloroethene and degradation products cis-1,2-dichloroethene and vinyl chloride. In situ chemical oxidation treatment was completed in 2003 via the injection of sodium permanganate in source areas. Subsequent stimulation of in ...


    By EOS Remediation, LLC

  • A Pilot Scale EZVI and ZVI Treatment of Unsaturated and Saturated Soil for TCE Reduction

    ABSTRACT: Enhanced biological reductive dechlorination, micro-scale zero valent iron (ZVI), and emulsified zero valent iron (EZVI) injections were implemented to treat chlorinated volatile organic compounds (CVOCs) at a former manufacturing facility in western South Carolina.  These remedial approaches – until recently typically implemented as standalone technologies –were ...

  • Treatment of Dense Non-Aqueous Phase Liquids Through Enhanced Bioremediation

    ProblemAs a result of trichloroethene (TCE) releases to groundwater during the 1960’s, TCE is now found in the sandy aquifer beneath the Site in the form of a dense, non-aqueous phase liquid (DNAPL). Testing for the vinyl chloride reductase (vcrA) gene (Gene-Trac-VC) and bench scale treatability testing indicated that native Dehalococcoides (Dhc) found at the Site were not uniformly capable of ...


    By SIREM

  • Full-scale KB-1® Bioaugmented Biobarrier for TCE Plume Containment

    Problem DefinitionThe site is a former manufacturing facility, where a historic trichloroethene (TCE) release created a plume 1,100 feet wide and 7,000 feet long averaging 3,600 micrograms per liter (μg/ L) TCE, with a groundwater velocity of about 2 feet per day. Prior to biostimulation with electron donor, the groundwater conditions ranged from aerobic to mildly reducing and Gene-Trac DNA ...


    By SIREM

  • Tacoma, WA - ESTCP Fort Lewis heat enhanced bio - Case Study

    Heat Enhanced Bioremediation and Destruction Introduction In situ thermal treatment through Electrical Resistance Heating (ERH) is a proven robust technology for the treatment of volatile organic compound (VOC) source zones. ERH effectively treats the subsurface by volatilizing dense non-aqueous phase liquid (DNAPL) and VOCs, recovering the vapor, and ...


    By TRS Group, Inc.

  • An improved method for injection of emulsified edible oils

    A field demonstration of the technology at a former adhesive manufacturing facility is presented. Treatment consisted of creating a permeable reactive barrier (PRB) downgradient of the DNAPL source, and injection of emulsified oil amendment directly into the source area. The primary soil and groundwater contaminants consisted of 1,1,1-trichloroethane (1,1,1-TCA), trichloroethene (TCE), and their ...


    By RNAS Remediation Products

  • Conducted demonstration projects for bioremediation technologies treating chlorinated organic constituents in the groundwater and soil at Dover Air Force Base

    LOCATION:  Dover, DelawarePROJECT DATE:  July, 1996 to July, 1999CLIENT:  The Remediation Technology Development Forum and Dover AFB BACKGROUND: The Remediation Technology Development Forum (RTDF) for Bioremediation of Chlorinated Solvents Work Group has conducted demonstration projects for bioremediation technologies treating chlorinated organic constituents in the groundwater and ...


    By Terra Systems, Inc. (TSI)

  • KB-1® Bioaugmentation Leading to Site Closure

    Problem DefinitionIn 2004, the site was an active manufacturing facility with plume trichloroethene (TCE) concentrations ranging from 1 to 20 milligrams per liter (mg/L), and hexavalent chromium (Cr[VI]) ranging from 0.5 to 7 mg/L. Intermediate degradation products of TCE were present in only trace concentrations in this primarily aerobic aquifer. The site source area was excavated in March ...


    By SIREM

  • In Situ Bioremediation of Chlorinated Solvents

    ABSTRACT: In situ bioremediation is ongoing at a former manufacturing facility in Portland, Oregon.  Shallow groundwater at the site was impacted by chlorinated solvents, primarily trichloroethene and degradation products cis-1,2-dichloroethene and vinyl chloride.  In situ chemical oxidation treatment was completed in 2003 via the injection of sodium permanganate in source ...


    By EOS Remediation, LLC

  • DOD evaluates bioaugmentation for remediating low-pH aquifers

    The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...

  • Heat-enhanced bioremediation and destruction - Case Study

    Introduction In situ thermal treatment through Electrical Resistance Heating (ERH) is a proven robust technology for the treatment of volatile organic compound (VOC) source zones. ERH effectively treats the subsurface by volatilizing dense non-aqueous phase liquid (DNAPL) and VOCs, recovering the vapor, and treating the vapor by conventional technologies such as granular activated carbon ...


    By TRS Group, Inc.

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