Method for reclaiming lands polluted by hexavalent chromium

Details Method for reclaiming lands polluted by hexavalent chromium Method for reclaiming lands polluted by hexavalent chromium

2011-03-29

2011-03-29

Kreck, John (Department: 3672)

Hydraulic and earth engineering

Soil remediation

With treatment

C588S319000, C588S412000

Reexamination Certificate

active

07914232

ABSTRACT:
A procedure for the on-site reduction to a predetermined level of the concentration of hexavalent chromium in a saturated or unsaturated contaminated area or ground, in which an in-depth treatment of this area or ground is carried out with a predetermined quantity of a gaseous mixture consisting of hydrogen and another inert gas in order to chemically reduce the hexavalent chromium to a state of lower valence, in particular to the state of trivalent chromium.

REFERENCES:
patent: 5986159 (1999-11-01), Aines et al.
patent: 6221002 (2001-04-01), James
patent: 6524842 (2003-02-01), Vainberg et al.
patent: WO03/022744 (2003-03-01), None
International Search Report from PCT/IT2007/000524.

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