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Title: Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater

Abstract

A method of reducing the concentration of Cr(VI) in a liquid aqueous residue comprises the steps of providing anaerobic Cr(VI) reducing bacteria, mixing the liquid aqueous residue with a nutrient medium to form a mixture, and contacting the mixture with the anaerobic Cr(VI) reducing bacteria such that Cr(VI) is reduced to Cr(III). The anaerobic Cr(VI) reducing bacteria appear to be ubiquitous in soil and can be selected by collecting a soil sample, diluting the soil sample with a sterile diluent to form a diluted sample, mixing the diluted sample with an effective amount of a nutrient medium and an effective amount of Cr(VI) to form a mixture, and incubating the mixture in the substantial absence of oxygen such that growth of Cr(VI) sensitive microorganisms is inhibited and growth of the anaerobic Cr(VI) reducing bacteria is stimulated. A method of in situ bioremediation of Cr(VI) contaminated soil and/or groundwater is also disclosed. 10 figs.

Inventors:
;
Issue Date:
Research Org.:
EG&G Idaho, Inc.; Lockheed Idaho Technologies Company
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
541739
Patent Number(s):
5,681,739
Application Number:
PAN: 8-452,591
Assignee:
Lockheed Idaho Technologies Co., Idaho Falls, ID (United States) IDO; SCA: 540220; PA: EDB-97:142243; SN: 97001865579
DOE Contract Number:  
AC07-94ID13223; AC07-76ID01570
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 28 Oct 1997
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; REMEDIAL ACTION; BIODEGRADATION; CHROMIUM; SOILS; GROUND WATER; ANAEROBIC CONDITIONS; TECHNOLOGY ASSESSMENT

Citation Formats

Turick, C.E., and Apel, W.W. Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater. United States: N. p., 1997. Web.
Turick, C.E., & Apel, W.W. Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater. United States.
Turick, C.E., and Apel, W.W. Tue . "Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater". United States.
@article{osti_541739,
title = {Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater},
author = {Turick, C.E. and Apel, W.W.},
abstractNote = {A method of reducing the concentration of Cr(VI) in a liquid aqueous residue comprises the steps of providing anaerobic Cr(VI) reducing bacteria, mixing the liquid aqueous residue with a nutrient medium to form a mixture, and contacting the mixture with the anaerobic Cr(VI) reducing bacteria such that Cr(VI) is reduced to Cr(III). The anaerobic Cr(VI) reducing bacteria appear to be ubiquitous in soil and can be selected by collecting a soil sample, diluting the soil sample with a sterile diluent to form a diluted sample, mixing the diluted sample with an effective amount of a nutrient medium and an effective amount of Cr(VI) to form a mixture, and incubating the mixture in the substantial absence of oxygen such that growth of Cr(VI) sensitive microorganisms is inhibited and growth of the anaerobic Cr(VI) reducing bacteria is stimulated. A method of in situ bioremediation of Cr(VI) contaminated soil and/or groundwater is also disclosed. 10 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}