Emulsified Zero-Valent Iron (EZVI)
Emulsified Zero-Valent Iron (EZVI) is a water in oil emulsion consisting of nano/micro scale zero-valent iron, surfactant, food grade vegetable oil, and water that reductively dehalogenates halogenated hydrocarbons (e.g. PCE, TCE, CFC, VC). EZVI uses a patented micellular structure to deliver reactive iron which mimics the physical chemistry of DNAPL. It has the ability to mix with DNAPLs present in the subsurface environment. Thus, EZVI is a 'source area' remediation technology.
- Developed/patented by NASA
- Field-tested by the U.S. EPA under the SITE Program
- Primarily used for in-situ DNAPL source area destruction
- Typical source concentration decrease ~90+% within 3 months
- Surfactant-stabilized water-in-oil emulsion with zero-valent iron particles
- Hydrophobic, dense emulsion absorbs DNAPL, delivering contaminant to iron
- In-situ chemical reduction of chlorinated solvent to ethene and water
- Injection or soil mixing using conventional technologies
- Does not promote mobilization of DNAPL
- RemQuest, TEA's exclusive provider of products and technologies, is the largest custom manufacturer/supplier of EZVI, providing reactive, stable emulsions since 2005
TEA's EZVI products have been utilized at multiple locations across the United States as well as internationally.