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ZVI-CLAY SOIL MIXING TREATS DNAPL SOURCE AREA AT 35-FOOT DEPTH
Citation:
PULS, R., M. OLSON, AND T. SALE. ZVI-CLAY SOIL MIXING TREATS DNAPL SOURCE AREA AT 35-FOOT DEPTH. IN: Technology News and Trends, (22):3 , (2006).
Impact/Purpose:
Newletter Article
Description:
The DuPont Company and Colorado State University (CSU) are collaborating in development and refinement of a technology that involves in-situ admixing of contaminated soil, granular zero valent iron (ZVI), and clay using conventional soil mixing equipment. A full-scale application of this technology was conducted in 2002 at a former DuPont nylon manufacturing facility in Martinsville, VA, where carbon tetrachloride (CT) concentrations averaged 4,000,000 ug/kg. Post-treatment soil sample analyses indicated 99% removal of CT and total chlorinated organic compounds (CVOCs) after one year of treatment. Field tests also showed that treatment significantly reduced soil permeability and thereby limited the release of remaining contaminants into ground water.