Leaders in Remediation of Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS)
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
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.
eZVI is a simple, safe, low-cost solution for the in-situ remediation of source zones impacted with halogenated hydrocarbons.
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.
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.
*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.