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US 6,664,298 B1Granted
Zero-valent metal emulsion for reductive dehalogenation of DNAPLs
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsDebra R. Reinhart, Christian Clausen, Cherie L. Geiger, Jacqueline Quinn, Kathleen Brooks
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Abstract
A zero-valent metal emulsion is used to dehalogenate solvents, such as pooled dense non-aqueous phase liquids (DNAPLs), including trichloroethylene (TCE). The zero-valent metal emulsion contains zero-valent metal particles, a surfactant, oil and water. The preferred zero-valent metal particles are nanoscale and microscale zero-valent iron particles
Claims5
A zero-valent metal emulsion comprising,
- a) 6.4-10.6 wt. % a plurality of zero-valent iron particles;
- b) 1.0-1.8 wt % a surfactant;
- c) 32-53 wt. % an oil;
- and
- d) 36-59 wt. % water.
2 more elements
Dependencies are inferred from the claim text.