For every zone of your plume, we’ve got you covered!

Leaders in Remediation of Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)

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Let our Experienced Technical Service Team assist you with a no charge evaluation of your site.

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Nutrimens®

- Enhances Efficiency

- Minimizes Methane Production


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Electron Donor

Solutions for

Enhanced

Reductive Dechlorination

Formulating Surfactant Blends


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iSOC®

Accelerating Natural Attenuation of Petroluem Hydrocarbons

Additive injection and groundwater recirculation trailers available for short or long term lease.

TersOx™ - Inorganic Peroxygen for Enhanced Aerobic Bioremediation

RemBind designed to treat TPH, PAH, PFOS, PCBs, PCPs, and various pesticides

Sulfate Enhanced Bioremediation 

Emulsified Zero-Valent Iron (eZVI)

eZVI is an emulsion of powdered zero-valent iron, surfactant, vegetable oil, and water specifically designed for the remediation of source zones impacted with halogenated hydrocarbons.  eZVI has the unique ability to mix with dense non-aqueous phase liquids (DNAPLs) by capitalizing on the ability of food-grade surfactants, biodegradable vegetable oil, water, and zero-valent iron to form hydrophobic emulsion droplets (micelles) that are miscible with DNAPL material in-situ due to matching physical chemistries. Abiotic reductive dechlorination occurs as the halogenated hydrocarbons in DNAPL diffuse through the outer oil membrane into the interior aqueous phase of the emulsion, which contains zero-valent iron. Encapsulating zero-valent iron with a hydrophobic membrane protects the nano-microscale iron from native groundwater constituents that might otherwise waste the iron‘s reducing capacity, and thereby reduce the mass of eZVI available to treat target contaminants and overall project costs. In addition to the abiotic reactions provided by the ZVI, the vegetable oil and surfactant components present in eZVI act as a long-term electron donor for enhanced biological reductive dechlorination

Purpose  

eZVI is a simple, safe, low-cost solution for the  in-situ remediation of source zones impacted with halogenated hydrocarbons.  

Configuration 

eZVI applications are easily configured and tailored to meet site-specific conditions.   Configurations include applications in grids, barriers and excavations.  eZVI can be applied to the subsurface using direct-push injection, hollow-stem auger, hydraulic or pneumatic fracking, and large diameter auger (LDA) or other soil mixing technologies. 

Benefits  

  • Effective for in situ treatment of DNAPL source zones
  • Directly treats residual and phase DNAPLs
  • Requires less treatment time
  • Reduces treatment costs
  • Produces less-toxic and more-easily degradable byproducts
  • Is environmentally safe
  • Field-tested by the U.S. Environmental Protection Agency (EPA) under the Superfund Innovative Technology Evaluation (SITE) program
  • Typical source concentration decrease ~90+% within 3 months
  • Hydrophobic, dense emulsion absorbs DNAPL, delivering contaminant to iron
  • In situ chemical reduction of chlorinated solvents to ethene and water
  • Applied using injection or soil mixing using conventional technologies
  • Developed/patented by NASA 

Awards 

  • 2007 NASA Induction into the Technology Hall of Fame
  • 2006 Federal Laboratory Consortium Excellence in Technology
  • Transfer
  • 2005 NASA Government Invention of the Year
  • 2005 NASA Commercialization Invention of the Year

Longevity

eZVI has been shown to remain effective in the subsurface for greater than 3 years.  The longevity of the emulsion is estimated to be 3 – 5 years depending on the type of source area being remediated.

Field Applications

  • Dye and paint manufacturers
  • Dry cleaners
  • Chemical manufacturers
  • Metal cleaning and degreasing facilities
  • Leather-tanning facilities
  • Pharmaceutical manufacturers
  • Adhesive and aerosol manufacturers
  • Government facilities

Product Specifications

  • Density: 1.05-1.10 g/mL
  • Hydrophobicity: Digital image verification
  • Micellular Structure: Micrograph digital image verification

Chemical/Physical Data

  • Appearance: Grey to black viscous liquid
  • Odor: Soybean oil (cooking oil) odor
  • Solubility in Water: Insoluble
  • Specific Gravity: 1.05-1.13 g/mL
  • Percent Solids By Weight: 10-17%

Packaging Options

  • 275-gallon IBC containers (2,300 net lbs.)
  • 3,000 - 5,000 gallon tankers

*eZVI is a NASA developed and patented technology, U.S. Patent Application Nos. 6,664,298 and 7,037,946.  eZVI is sold under License Agreement No. DN-1205 between NASA and Tersus.  

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