perchlorate contamination Articles

  • Biological treatment of ammonium perchlorate-contaminated wastewater: a review

    Absolute reduction of perchlorate has proven complex owing to the diverse characteristics of the perchlorate ion. Technologies such as chemical reduction, ozone/peroxide, nanofiltration, and reverse osmosis have had limited success, high costs and are not environmentally friendly. A great deal of research and reviews on ion exchange and biodegradation have been carried out, but conditions for ...


    By IWA Publishing

  • Edible Oil Barriers for Treatment of Perchlorate Contaminated Groundwater

    An EOS® biobarrier was designed and implemented to remediate perchlorate contaminated groundwater. The report describes the site characterization, design steps, implementation, monitoring results and lessons learned from this effective remedial approach. EXECUTIVE SUMMARYThis final technical report documents the demonstration of emulsified edible oils for remediation of perchlorate in ...


    By EOS Remediation, LLC

  • Perchlorate Treatment Technology Update

    This issue paper has been prepared by EPA's Federal Facilities Forum to provide information about technologies available for treatment of perchlorate contamination in environmental media, including technologies that have been used to date and others that show potential for treating such contamination. Furthermore, this paper provides site-specific information on 51 projects where treatment ...

  • Dynamics of nitrate & perchlorate in groundwater.

    The Apache Powder Superfund Site is located in Cochise County, Arizona, approximately 50 miles southeast of Tucson. The site was listed on the National Priorities List pursuant to CERCLA in 1990. Principal groundwater chemicals of concern (COCs) include nitrate-nitrogen (nitrate-N) and perchlorate. Concentrations of nitrate-N exceeding 500 mg/l and 2,300 mg/l have been detected in the “shallow ...


    By Hargis + Associates Inc

  • Perchlorate Remediation Project Case Study

    ARCADIS was contracted in 2000 to lead the development, evaluation and selection of a final groundwater remedy for this 94-acre site in California. As part of this work, ARCADIS is also participating in the evaluation of innovative technologies with the potential to treat soil impacts in the multiple source areas across the site. Specifically, the project is focused on the remediation of seven ...


    By Arcadis

  • Perchlorate, Chrome 6 and Freon-113 Remediation

    Site Summary At an ordnance facility in Hollister, CA, the groundwater aquifer was found to be contaminated by a variety of compounds, the more significant compounds being perchlorate, Chrome-6 and Freon-113. Perchlorate was detected at levels of 1,600 to 7,500 ug/L, Chrome-6 at levels of 15 to 210 ug/L, and Freon-113 at levels of 180 to 430 ug/L. The aquifer was composed of a medium to fine ...


    By REGENESIS

  • Inhibition of bacterial perchlorate reduction by zero-valent iron

    Perchlorate was reduced by a mixed bacterial culture over a pH range of 7.0–8.9. Similar rates of perchlorate reduction were observed between pH 7.0 and 8.5, whereas significantly slower reduction occurred at pH 8.9. Addition of iron metal, Fe(0), to the mixed bacterial culture resulted in slower rates of perchlorate reduction. Negligible perchlorate reduction was observed under abiotic ...


    By Springer

  • Novel perchlorate treatment at Edwards sparks national interest

    Untitled Document People from across the nation came to Edwards on May 14 to see a new ...


    By J.C. Palomar, Inc.

  • 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

  • Emulsified-Oil Biobarrier Provides Long-Term Treatment of Perchlorate/VOC Plume

    Security Technology Certification Program (ESTCP) evaluation of a PRB containing emulsified oil substrate (EOS®). The pilot study was initiated in 2003 at the Alliant Techsystems, Inc., facility in Elkton, MD, to evaluate effectiveness of EOS technology for enhancing biodegration of perchlorate and chlorinated solvents. A single dose of low solubility, low viscosity, and slowly biodegradable ...


    By EOS Remediation, LLC

  • Bioregeneration of Spent Ion-Exchange Resin Loaded with Nitrate/Perchlorate and Biofouling Removal

    A new process has been developed that regenerates perchlorate/nitrate-contaminated ionexchange resins (IX) biologically without requiring the use of brine. The process consists of directly contacting perchlorate/nitrate-loaded IX resin with a perchlorate/nitrate-reducing microbial culture under anoxic/anaerobic conditions leading to conversion of the perchlorate and nitrate load on the resin to ...

  • Concurrent bioremediation of perchlorate and 1,1,1-trichloroethane in an emulsified oil barrier

    Abstract A detailed field pilot test was conducted to evaluate the use of edible oil emulsions for enhanced in situ biodegradation of perchlorate and chlorinated solvents in groundwater. Edible oil substrate (EOS®) was injected into a line of ten direct push injection wells over a 2-day period to form a 15-m-long biologically active permeable reactive barrier (bio-barrier). Field ...


    By EOS Remediation, LLC

  • Treatment of Perchlorate and 1,1,1-Trichloroethane in Groundwater using Edible Oil Substrate (EOS®)

    ABSTRACT: Laboratory studies and a pilot-scale field test are being conducted to evaluate the use of edible oil emulsions for biodegradation of perchlorate and 1,1,1-trichloroethane (1,1,1-TCA) in groundwater at a site in Maryland. The patented Edible Oil Substrate (EOS®) process is a cost-effective approach for stimulating in situ anaerobic biodegradation with little or no operation and ...


    By EOS Remediation, LLC

  • Case Study: Southern California Water Professionals View Perchlorate Data with EQuIS for ArcGIS

    Perchlorate contamination is of major concern in many parts of the country and particularly in the Southwestern United States. In a recent event held at California State University, San Bernardino, perchlorate data from a 2 million record EQuIS data set incorporating the data from over 2000 sample points were examined by environmental professionals from utilities, water districts, several cities, ...


    By EarthSoft, Inc

  • Soy Oil ‘Walls’ Win Against Perchlorate, Texas Military Facility Gets EPA, State OK for Reuse

    “The successful remediation of more than 50 years of contamination—including perchlorate—earned a 9,700-acre U. S. Navy facility the “Ready for Reuse” (RFR) Determination by the U.S. Environmental Protection Agency (EPA) and the Texas Commission on Environmental Quality (TCEQ). One hero of this accomplishment is the soybean, or to be more precise its derivative, soy oil (EOS), which cleaned up ...


    By EOS Remediation, LLC

  • A look at some contaminants regulated in drinking water

    The U.S. Environmental Protection Agency regulates just over 90 contaminants in public drinking water systems. They include manmade chemicals as well as naturally occurring contaminants from rocks and soil. A look at some of the contaminants that fall under federal or state regulations: ARSENIC: Enters drinking water through eroding natural deposits in the ground or mining and other ...


    By Associated Press

  • Addressing contaminated groundwater with organic mulch permeable reactive barriers

    Organic mulch consists of insoluble carbon biopolymers that are enzymatically hydrolyzed during decomposition to release aqueous total organic carbon (TOC). The released TOC is utilized by microorganisms as an electron donor to transform electrophilic contaminants via reductive pathways. Over the last decade, organic mulch permeable reactive barriers (PRBs), or biowalls, have received increased ...


  • Residential water treatment - the next big class action litigation

    TTHM, MTBE, and Perchlorate. Mention these potential water contaminants around municipal water and wastewater supervisors, the Department of Defense, or the major U.S. oil producers, and see how fast the room clears! The major oil companies are back in litigation after the failure of current treatment technologies to remove MTBE contamination in residential drinking water supplies, the Department ...


  • Protocol for Enhanced In Situ Bioremediation Using Emulsified Edible Oil

    An in-depth discussion of the EOS® patented technology and its usefulness for site remediation is presented. Details of how the technology works, design considerations as well as strengths and limitations of the technology are presented. 1.1 INTRODUCTION Management of groundwater contaminated with chlorinated solvents, perchlorate, and explosives is one of the Department of Defense’s (DoD’s) ...


    By EOS Remediation, LLC

  • Complex hydrocarbon pollutants in America`s Water

    Class action litigation continues to dominate the environmental news as it relates to MTBE (the cleaner previously used in gasoline), Perchlorate (primarily found in rocket fuel); and 1,4-Dioxane ( a widely used solvent) found in numerous State’s well and surface waters. Over 33-states currently have imposed their own regulations on MTBE, and the USEPA is reviewing what the Federal standard for ...


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