In-situ treatment of in ground contamination
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United States of America Patent
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Issued Date -
May 3, 2007
app pub date -
Feb 24, 2006
filing date -
Nov 2, 2005
priority date (Note) -
Abandoned
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Abstract
In systems and methods for treatment of underground contamination, a reducing compound is provided as a substantially insoluble material in an underground formation. The reducing compound accordingly remains substantially in place, even over long periods of time, and is not washed out by underground water movement or diffusion. Accordingly, the reducing compound acts continuously to chemically reduce and remove contamination. When used for treatment of chromium ore processing residue contamination, the reducing compound may be formed and remain in the pores of the residue. As hexavalent chromium diffuses from the residue, it is reduced by the reducing compound. The reducing compound may be injected as a liquid into the underground formation, and then change to a more solid form. Chlorinated solvent contamination may also be treated.
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