| US 7,581,902 B2 | ||
| In situ immobilization of metals in contaminated sites using stabilized iron phosphate nanoparticles | ||
| Dongye Zhao, Auburn, Ala. (US); Zhong Xiong, Auburn, Ala. (US); Mark Barnett, Auburn, Ala. (US); Ruiqiang Liu, Auburn, Ala. (US); Willie F. Harper, Auburn, Ala. (US); and Feng He, Auburn, Ala. (US) | ||
| Assigned to Auburn University, Auburn, Ala. (US) | ||
| Filed on Feb. 28, 2007, as Appl. No. 11/680,266. | ||
| Claims priority of provisional application 60/860305, filed on Nov. 21, 2006. | ||
| Claims priority of provisional application 60/777309, filed on Feb. 28, 2006. | ||
| Prior Publication US 2007/0203388 A1, Aug. 30, 2007 | ||
| Int. Cl. B09C 1/00 (2006.01) | ||
| U.S. Cl. 405—128.45 | 38 Claims |
| 1. A method of immobilizing toxic metals in a toxic metal contaminated site, comprising the steps of:
(a) providing a composition comprising:
(i) a liquid carrier,
(ii) stabilized nanoparticles dispersed in the liquid carrier, wherein the metal nanoparticles comprise an iron phosphate,
and
(iii) a stabilizer to control the dispersibility of the metal nanoparticles in the liquid carrier; and
(b) delivering an effective amount of said composition to a toxic metal contaminated site so that said nanoparticles immobilize
one or more toxic metals in said site.
|