Metal remediation using a mesoporous nanocomposite

Details Metal remediation using a mesoporous nanocomposite Metal remediation using a mesoporous nanocomposite

2011-03-29

2011-03-29

Silverman, Stanley (Department: 1736)

Hazardous or toxic waste destruction or containment

Processes for making harmful chemical substances harmless,...

Harmful chemical substances made harmless, or less harmful,...

C502S407000, C502S414000, C588S407000

Reexamination Certificate

active

07915475

ABSTRACT:
A novel method for remediating metals includes treating the metals with a mesoporous nanocomposite such as HMS, MCM-41 or MCM-48. The metal is preferably lead but can be at least one metal selected from Pb, Hg, Cd, Zn, Sn, As, Sb, In, Se, Ga, Te, Bi, Ni, Cu, Mo, Ni, Cu, Sr, Ba or Co. The treating is preferably performed at a pH of about 4 to about 12. In the invention, the treating can also include desorbing the metal from the mesoporous nanocomposite at a pH of about 2 or less.

REFERENCES:
patent: 6096288 (2000-08-01), Roth
patent: 6930219 (2005-08-01), Shan et al.
Tarek Abdel-Fattah, May 2003, Abstracts of Papers, 81stAnnual Meeting of the Virginia Academy of Science, p. 83.
Abdel-Fattah et al. “Using organo-silicate nanocomposites for aqueous lead species removal”, Environmental Management Science Program (EMSP) Symposium, Mar. 23-27, 2003, New Orleans, LA.

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