Treating groundwater by injecting iron

[Lenny Siegel <lsiegel@cpeo.org>]

At Hunters Point Naval Shipyard in San Francisco, the Navy has
successfully demonstrated an innovative in situ technology for treating
trichloroethylene (TCE) in groundwater. Like the permeable reactive
barrier technology, which for several years now has been used to treat
contamination that flows through a barrier containing iron filings, the
new technology, Zero-Valent Iron Injection, uses iron to break down
chlorinated solvents. Reactive iron powder is injected, under pressure
from nitrogen gas, into the subsurface. According to the Navy, "Results
indicate that TCE concentrations in the treatment area were
significantly reduced in just three weeks." For details, see
http://www.efdsw.navfac.navy.mil/Environmental/pdf/hpnl1003.pdf.

-- 


Lenny Siegel
Director, Center for Public Environmental Oversight
c/o PSC, 278-A Hope St., Mountain View, CA 94041
Voice: 650/961-8918 or 650/969-1545
Fax: 650/961-8918
<lsiegel@cpeo.org>
http://www.cpeo.org

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