in-situ remediation chemical Articles

  • In situ Chemical Oxidation: An Innovative Groundwater Remediation Technology

    A promising new technology, in situ Chemical Oxidation (ISCO), has the potential to supplant the more widely used pump-and-treat groundwater remediation technology by destroying groundwater contamination in situ (in place). ISCO is the process of oxidizing contaminants in the groundwater and soil by injecting water containing high concentrations of an oxidant to the site of the contamination. ...


    By AECOM

  • The In Situ Bioremediation/Groundwater Remediation Process

    In-situ groundwater bioremediation is a technology that encourages growth and reproduction of indigenous microorganisms to enhance biodegradation of organic constituents in the saturated zone. In-situ groundwater bioremediation can effectively degrade organic constituents which are dissolved in groundwater and adsorbed onto the aquifer matrix. The Adventus In Situ Bioremediation/Groundwater ...


  • Enhancing in-situ chemical oxidation performance

    In this edition of Peroxygen Talk, guest authors Matt Burns and Bob Pirkle discuss the benefits of compound specific isotope analysis (CSIA) to optimize delivery and monitor performance of ISCO applications. Mr. Burns is a Senior Project Director at WSP Environment & Energy, a leading environmental, energy and sustainability consultancy with over 1,000 people in 65 global locations. He has more ...

  • Application of In Situ Remediation Technologies by Subsurface Injection (PDF)

    There are many emerging remedial technologies which require the introduction of various materials to the saturated zone of a contaminated site in an effort to remediate groundwater in-situ. These remedial materials include both chemical compounds as well as proprietary products such as hydrogen release and oxygen release compounds.A common requirement to implement an effective application of many ...


    By REGENESIS

  • Apparatus for In-Situ Remediation Using Aclosed Delivery System

    ABSTRACT: In the ever-emerging field of in-situ remediation many strides are being taken to improve the efficacy of degradation. Countless hours and unparalleled research is constantly being performed in order to improve or replace current technologies. These technologies include in-situ chemical oxidation, anaerobic processes, bioaugmentation, zero valent iron, stimulation, etc. Due to the ...

  • In-Situ Anaerobic Remediation of Perchlorate-Impacted Soils

    AbstractARCADIS is currently leading the development, evaluation, and selection of a final groundwater remedy for a 94-acre manufacturing facility in the western U.S. This facility has produced small explosives and vehicular safety products since 1957. As a result of historic operations, soil and groundwater at the site have been impacted by perchlorate. To date, remediation efforts have been ...


    By Arcadis

  • In Situ Physical/Chemical Treatment for Ground Water and Leachate

    The main advantage of in situ treatments is that they allow ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ processes, however, generally require longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more ...

  • In Situ Physical/Chemical Treatment for Soil, Sediment, and Sludge

    The main advantage of in situ treatment is that it allows soil to be treated without being excavated and transported, resulting in potentially significant cost savings. However, in situ treatment generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in soil and aquifer characteristics and because the efficacy of the ...

  • In Situ Chemical Oxidation Remediation Pilot Study Of A Karst Bedrock Aquifer Contaminated With Chlorinated Solvents

    ABSTRACT A pilot study to evaluate an innovative in situ treatment technology was implemented at Letterkenny Army Depot, Chambersburg, Pennsylvania, for a limestone bedrock aquifer contaminated with chlorinated solvents. This technology destroys VOCs in groundwater, utilizing a network of injection points to deliver a solution of hydrogen peroxide (50%), catalysts, and surfactants. The ...


    By Weston Solutions, Inc

  • In Situ Thermal Remediation of DNAPL and LNAPL Using Resistance Heating

    Electrical resistance heating (ERH) is an in situ thermal treatment for soil and groundwater remediation that can reduce the time to clean up volatile organic compounds (VOCs) from years to months. The technology is now mature enough to provide site owners with both performance and financial certainty in their site-closure process. The ability of the technology to remediate soil and groundwater ...


    By TRS Group, Inc.

  • The Thermodynamic Bubble problem and its relevance for In-Situ thermal remediation

    ABSTRACT This paper presents the thermodynamic bubble problem and its relevance for successful design of an in-situ thermal remedy of DNAPL in the water saturated zone. This investigation is relevant to the mass transfer of chemicals that have been volatilized as a result of an in-situ thermal remediation process. The volatilized chemicals exist as numerous entrained bubbles in the water ...


    By McMillan-McGee Corp.

  • In situ Remediation of 1,4-Dioxane using Electrical Resistance Heating

    An increasing number of states are establishing enforceable 1,4-dioxane cleanup goals due to recent improvements in analytical detection methods and existing carcinogenic risk information for 1,4-dioxane. Historically, 1,4-dioxane was used as a stabilizer for chlorinated solvents, primarily 1,1,1-trichloroethane. In addition, 1,4-dioxane has been used in a broad range of products including but ...


    By TRS Group, Inc.

  • Surfactant enhanced in-situ remediation of DNAPL impacted soil and groundwater - Montreal refinery

    Abstract A Montreal chemical refinery reduced the dichlorobenzene and other dense non-aqueous phase liquid (DNAPL) impacts on the soil and groundwater where a railway line is adjacent to an above ground storage tank farm. Ivey-sol® surfactant mixtures were injected three times during a two week pilot test, into a series of in-situ wells. The soil and groundwater matrix experienced ...


    By Ivey International Inc.

  • In-Situ Remediation of Heavy Metals Using Sulfur-Based Treatment Technologies

    The Metal Problem Highly toxic and highly soluble metals are contained in numerous waste streams including those from power, chemical, electronics facilities, general manufacturing plants, and mining facilities. Lead, chromium, arsenic, zinc, cadmium, copper, and mercury are the most common metal contaminants found on remediation project sites (US EPA, October, 2000). Cyanide is a common ...


    By Graus Chemicals, LLC

  • In Situ Remediation of PCE at a Site With Clayey Lithology and a Significant Smear Zone

    Groundwater at the former Serry’s Dry Cleaning site in Corvallis, Oregon, was impacted by chlorinated volatile organic compounds (CVOCs). The primary CVOCs impacting the site include tetrachloroethene, trichloroethene, dichloroethene, and vinyl chloride, which were detected at concentrations up to 22,000, 1,700, 3,100, and 7 μg/L, respectively, prior to treatment. Large ...


  • Multifunctional Well Implemented for In Situ Remediation of Hydrocarbon Contaminations in Soil and Groundwater

    Abstract A recently developed Multifunctional Well has been implemented for the remediation of subsurface contamination caused by hydrocarbon spills. Four different remediation processes can be operated within the same well. At optimal efficiency of each remediation process, successive treatment of the capillary fringes, the vadose zone, and the aquifer can be accomplished. Each treatment ...


  • In Situ Solidification/Stabilization

    Introduction Solidification/stabilization (S/S) reduces the mobility of hazardous substances and contaminants in the environment through both physical and chemical means. Unlike other remedial technologies, S/S seeks to trap or immobilize contaminants within their 'host' medium (i.e., the soil, sand, and/or building materials that contain them), instead of removing them through chemical or ...

  • 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

  • Cleo Springs, Oklahoma - in-situ chemical oxidation case study

    A gasoline spill occurred when a fuel tanker was forced off this curve in rural Oklahoma. Initial responders were unsuccessful in their effort to remove all of the contaminated soil. Cedar Creek Engineering was contracted to remediate the residual soil and groundwater contamination. Here a recovery well and reagent injection points are installed. The treatment process called for Fenton's reagent ...

  • In-situ chemical reduction (ISCR) versus emulsified oils: how to decide?

    Many industry practitioners, such as environmental consulting and engineering firms, are seeking topical decision-making criteria for their options when remediating impacted groundwater.  'Few, if any, of us are experts in the myriad fields of science associated with applied environmental biotechnology. As such, technology end-users, and vendors alike, are often confused and frustrated with ...


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