ZVI Applied To Remediate DoD Superfund Site
Combined Remedy Effectively Treats 1,2-DCA and TCE at Tinker Air Force Base
This case study reviews the remediation of dichloroethane (1,2-DCA) and Trichloroethylene (TCE) using colloidal zero valent iron (ZVI) at Tinker Air Force Base, a major United States Air Force base located in Oklahoma City, Oklahoma. The remediation included an application of emulsified vegetable oil (EVO), an aqueous suspension of colloidal zero valent iron (MicroZVI Precursor), with small amounts of fertilizer and B12. Typically, zero valent iron cannot be applied through well systems. However, due to the small particle size of the zero valent iron, this application was successfully applied through the existing wells. At 3 years post-injection, the contaminant levels remain near zero with the presence of ethene indicating continuous biodegradation.
This case study features the following:
- Successful application of colloidal zero valent iron through well system
- At 3 years post-injection, the presence of ethene signals active biodegradation
- Aqueous suspension of colloidal zero valent iron effectively reduced contaminant levels