Process for the in situ bioremediation of Cr(VI)-bearing solids

Details Process for the in situ bioremediation of Cr(VI)-bearing solids Process for the in situ bioremediation of Cr(VI)-bearing solids

1994-12-30

1996-10-08

Graysay, Tamara L.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

405128, 4552625, C02F 162, C12P 104

Patent

active

055625886

ABSTRACT:
Provided is a process for the treatment of Cr(VI)-bearing solids or soil by the in situ biological reduction of Cr(VI) to insoluble Cr(III). The pH of the Cr(VI)-bearing solids are adjusted with an acid or base to a pH of about 6.5 to 9.5, and thoroughly mixed in situ mixed with an organic material (such as manure) containing bacteria and nutrients.

REFERENCES:
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patent: 5062956 (1991-11-01), Lupton et al.
patent: 5155042 (1992-10-01), Lupton et al.
patent: 5202033 (1993-04-01), Stanforth et al.
patent: 5225340 (1993-07-01), Nghiem et al.
patent: 5302287 (1994-04-01), Losack
patent: 5336290 (1994-08-01), Jermstad
patent: 5397478 (1995-03-01), Pal et al.

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