Contaminant removal from natural resources
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsChristian A. Clausen, Jacqueline W. Quinn, Cheri L. Geiger, Debra Reinhart, Laura B. Filipek, Christina Coon, Robert Devor
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Abstract
A zero-valent metal emulsion containing zero-valent metal particles is used to remediate contaminated natural resources, such as groundwater and soil. In a preferred embodiment, the zero-valent metal emulsion removes heavy metals, such as lead (Pb), from contaminated natural resources. In another preferred embodiment, the zero-valent metal emulsion is a bimetallic emulsion containing zero-valent metal particles doped with a catalytic metal to remediate halogenated aromatic compounds, such as polychlorinated biphenyls (PCBs), from natural resources.
Claims38
A zero-valent metal emulsion comprising,
- a) a plurality of bimetallic particles, wherein said plurality of bimetallic particles is a plurality of zero-valent metal particles coated with a catalytic metal;
- b) a surfactant;
- c) an oil or d-limonene or both oil and d-limonene;
- and
- d) water.
A zero-valent metal emulsion comprising,
- a) a plurality of zero-valent metal particles or a plurality of bimetallic particles, wherein said plurality of bimetallic particles is a plurality of zero-valent metal particles coated with a catalytic metal;
- b) a surfactant;
- c) an oil or d-limonene or both oil and d-limonene;
- and
- d) water including an acid or a base.
Dependencies are inferred from the claim text.