Iron particles for purifying contaminated soil or ground water

Details Iron particles for purifying contaminated soil or ground water Iron particles for purifying contaminated soil or ground water

2006-04-04

2006-04-04

Gulakowski, Randy (Department: 1712)

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

C210S722000, C405S128750, C502S338000

Reexamination Certificate

active

07022256

ABSTRACT:
Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of α-Fe phase and Fe3O4phase, and having a BET specific surface area of 5 to 60 m2/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.

REFERENCES:
patent: 6271168 (2001-08-01), Imai et al.
patent: 6276287 (2001-08-01), Imai et al.
patent: 6459012 (2002-10-01), Imai et al.
patent: 6663840 (2002-12-01), Ukita et al.
patent: 6800587 (2004-10-01), Imai et al.
patent: 2001198567 (2001-07-01), None

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