Hydraulic and earth engineering – Soil remediation – With treatment
Reexamination Certificate
2007-03-30
2009-12-22
Kreck, John (Department: 3672)
Hydraulic and earth engineering
Soil remediation
With treatment
C977S903000, C588S319000
Reexamination Certificate
active
07635236
ABSTRACT:
A method for preparing highly stabilized and dispersible zero valent iron nanoparticles and using the nanoparticles as a remediation technology against inorganic chemical toxins in contaminated sites. The method employs a composition containing select polysaccharides (starch or cellulose) as a stabilizer for the iron nanoparticles in a liquid carrier, and results in suspensions of iron nanoparticles of desired size and mobility in water, brine, soils or sediments. The stabilizer facilitates controlling the dispersibility of the iron nanoparticles in the liquid carrier. An effective amount of the composition is delivered to a contaminated site so that the zero valent iron nanoparticles can remediate one or more toxins such as an arsenate, a nitrate, a chromate, or a perchlorate in the contaminated site.
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He et al, “Preparation and Characterization of a New Class of Starch-Stabilized Bimetallic Nanoparticles for Degradation of Chlorinated Hydrocarbons in Water,” 2005, pp. 3314-3320, vol. 39, Environ. Sci. Technol.
Xu Yinhui
Zhao Dongye
Andrus Sceales Starke & Sawall LLP
Auburn University
Kreck John
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