Colloidal iZVI

Injectable ZVI that eliminates the need for fracturing 

→ Optimizes distribution and contact in transmissive zones

→ Can be combined with anaerobic bioremediation, bioaugmentation, and ColloidalChem™

What is Colloidal iZVI?

Colloidal iZVI is a colloidal (5 um) injectable zero valent iron (iZVI) designed specifically for chlorinated solvent remediation, but can also be applied to hazardous metals, herbicides, and pesticides. Colloidal iZVI primarily targets contaminants in transmissive zones down gradient of the source or in barrier applications.  It’s also effective in remediating less concentrated source areas by treating contaminants through chemical reduction. 

What Makes it so Effective? 

  • High Persistence: Up to 7 years persistence in treatment zones in overcoming back diffusion challenges, especially at higher heterogeneous sites. 
  • Neat Suspension: A pre-blended colloidal ZVI suspension, crafted to eliminate field issues like ZVI ignition when handling 5 um dry ZVI solids or clumping, ensuring smooth application every time. 
  • Simplicity in Design: Designed for effortless mixing and dilution, eliminating the need for complex mixing systems. 
  • Versatile Integration: Seamlessly combines with other remediation chemistries, from anaerobic bioremediation and bioaugmentation to our ColloidalChem activated carbon. 

How Does it Work?

Inject Colloidal iZVI as a precisely blended liquid-suspension via direct push or injection wells.   

The unique formulation promotes broad dispersion in the subsurface at low and below fracture injection pressures, which optimizes distribution and contact. Through processes known as reductive dechlorination (for solvents) contaminants are degraded upon contact with the ZVI.  The byproducts are ultimately broken down into acetylene's, and ethenes.  


Learn about Automated Injection

Learn About Automated Injection

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What is It Designed to Address?

Chemical Reduction
  • Chlorinated solvents
  • Metals
  • Herbicides and Pesticides
PRB Applications
Combined Remedies
  • Abiotic/biotic remedies with carbon substrates and bioaugmentation
  • Abiotic/sequestration remedies with colloidal activated carbon
Downgradient Transmissive Zones

Can also treat less contaminated source areas.