remediation reagent Articles

  • Hydrogen Equivalents: Comparison of Simple Electron Donors to EHC In-Situ Chemical Reduction (ISCR) Reagents

    Biodegradation via reductive dechlorination processes occurs when microbes directly remove chlorine atoms from a chemical in order to derive energy from other organic compounds. This occurs under reducing, anaerobic conditions. A more effective remedial strategy, however, entails in situ chemical reduction (ISCR) using EHC as the reductant. As described herein, EHC™ is the patented combination of ...


  • Insitu mixing of dry and slurried reagents in soil and sludge using shallow soil mixing

    Introduction Recent implementation for the Federal Hazardous Waste Land Disposal Restrictions (LDR) to RCRA and USEPA's willingness to approve on-site treatment and/or containment has allowed in situ treatment methods to become viable options in site remediation. Shallow Soil Mixing (SSM) is one of several in situ mixing techniques now commercially available for use in on-site treatment of ...


    By Geo-Con, Inc.

  • Remediation of Explosives in Soil - Case Study

    Client: Department of the Army, U.S. Army Corps of Engineers Site: Ravenna Army Ammunition Plant (“AAP”), Ohio Task: In-situ Rapid Chemical Degradation of Munitions Constituents in Soil by MuniRem® Date: October 2009 Situation The test site is an inactive and ...


    By Planteco, Inc

  • 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

  • Remediation of petrol-contaminated sediments in a tropical environment

    Conventional and experimental methods were studied for the remediation of petroleum contaminated sediments from a dam previously used to collect acid run-off from a sulfur mine. The man-made lake had been neutralized, but bentonite rich sediments remained contaminated with very weathered hydrocarbons (sediments with ~50,000–60,000 mg/kg Total Petroleum Hydrocarbons were used in this study). ...

  • Evaluation of sodium lignosulphonate for the remediation of chromium–contaminated soil and water

    Commercial sodium lignosulphonate, a by–product of sulphite pulp leaching, was evaluated for the remediation of soil and water contaminated with hexavalent chromium. Two series of bench–scale tests were performed: (a) removal of chromium from water using reagent binding and membrane separation; and (b) stabilisation of chromium in the soil using chemical soil flushing. Water treatment tests were ...


    By Inderscience Publishers

  • 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 ...


  • Aerobics to the Rescue - Using Compatible Technologies to Improve Groundwater Remediation

    Background Increased opportunities for contaminated property redevelopment have propelled property owners to evaluate options for accelerating site remediation. In some cases a containment technology may have been implemented to mitigate the off-property migration of contamination as the most ...


    By CL Solutions, LLC

  • Lower costs, fewer delays - a highway expansion project applies XRF technology to obtain cost-effective remediation.

    X-ray fluorescence (XRF) spectrometry is a non-destructive, analytical method used primarily to detect the metal composition in soil/solids samples. Portable XRF instruments can provide rapid, accurate analysis of heavy metal levels in soil on new construction or redevelopment sites. In response to the growing need for field analysis of metals, many of these units have been adapted for use in the ...

  • 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 ...

  • Dehalogenation

    Introduction: Contaminated soil is screened, processed with a crusher and pug mill, and mixed with reagents. The mixture is heated in a reactor. The dehalogenation process is achieved by either the replacement of the halogen molecules or the decomposition and partial volatilization of the contaminants. Base-catalyzed Decomposition (BCD) Base-catalyzed ...

  • Technology Status Report In Situ Flushing

    ABSTRACT This technology status report provides a snapshot of the status of the in situ flushing remediation technology. The information provided herein is a reflection of the content of the Ground-Water Remediation Technologies Analysis Center’s (GWRTAC’s) case study database for innovative technologies. GWRTAC’s case study database is not represented as being comprehensive, nor are the case ...

  • Sample extraction kit user’s guide

    Intended Use This extraction kit is for use with the appropriate immunoassay test kit. Each Sample Extraction kit contains the materials necessary to process twelve (12) soil or wipe samples. Test Principles The reagents contained in the Sample Extraction kit have been optimized for fast, efficient removal of compounds from soil or surfaces and convenient ...


  • Degradability of hexachlorocyclohexanes in water using ferrate (VI)

    Regarding environmental pollution, the greatest public and scientific concern is aimed at the pollutants listed under the Stockholm Convention. These pollutants are not only persistent but also highly toxic with a high bioaccumulation potential. One of these pollutants, γ-hexachlorocyclohexane (γ-HCH), has been widely used in agriculture, which has resulted in wide dispersion in ...


    By IWA Publishing

  • 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 ...

  • Brownfield and Contaminated Land Development - Case Studies

    Whether it is an old industrial site in the center of a city, the corner gas station, or a former agricultural site that used pesticides for decades, contaminated property can be found anywhere. These sites can be considered CERCLA, RCRA, state regulated, Brownfield or any other designation. Helping to clean up properties like these, is a win win situation for ...


    By EN Rx

  • Less and More : Why You Should Pump Slurries with a Peristaltic Pump

    LESS WATER Peristaltic Pumps Use Less Water Hose pumps can circulate slurry SGs of 1.6 to 1.8 or up to 80% solid content. The traditional centrifugal pump loses efficiency when the slurry SG reaches 1.3 or 30% solids. With this limitation, slurry pumps have significant process water demands : on a plant processing 70 tonnes of ore per hour, every time a hose pump replaces a ...

  • Phosphorus control protects surface waters

    Phosphorus is the decisive factor for excessive algae and plant growth in water bodies, that’s why quality standards require reductions in the amount of phosphorus released from wastewater treatment plants into rivers and lakes. In recent years, the outlet limit values have not only been reduced on national levels. Depending on the vulnerability of ecosystems, especially low target values ...


    By Endress Hauser

  • O&G Superfund Site (ISOTEC Case Study 67) ISCO treatment program using activated persulfate - Kingston, NH

    ISOTEC was retained to implement an in-situ chemical oxidation (ISCO) treatment program at a former drum reconditioning superfund site in Kingston, New Hampshire to address impacted soil and groundwater.  Three separate treatment areas referred to as Area A, Area B and Area C were designated for treatment.  Primary contaminants of concern (COCs) at the site include benzene, toluene, ...

  • Peroxy-acid treatment of selected PAHs in sediments

    In an attempt to address some of the disadvantages of the common biotic and abiotic processes used for the degradation of Polycyclic Aromatic Hydrocarbons (PAHs), an alternative strategy utilising a primary chemical oxidative step to be combined with a biological post-treatment step was created. The degradation of α-methylnaphthalene, fluorene, phenanthrene, anthracene, pyrene and ...


    By Inderscience Publishers

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