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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.

Inventors:
 [1];  [1]
  1. (Idaho Falls, ID)
Issue Date:
Research Org.:
Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
871209
Patent Number(s):
5681739
Application Number:
08/452591
Assignee:
Lockheed Idaho Technologies Company (Idaho Falls, ID) INEEL
DOE Contract Number:  
AC07-94ID13223; AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; situ; bioremediation; hexavalent; chromium; contaminated; soils; groundwater; reducing; concentration; liquid; aqueous; residue; comprises; steps; providing; anaerobic; bacteria; mixing; nutrient; medium; form; mixture; contacting; reduced; iii; appear; ubiquitous; soil; selected; collecting; sample; diluting; sterile; diluent; diluted; effective; amount; incubating; substantial; absence; oxygen; growth; sensitive; microorganisms; inhibited; stimulated; disclosed; reducing bacteria; nutrient medium; contaminated soils; liquid aqueous; contaminated soil; soil sample; effective amount; situ bioremediation; substantial absence; hexavalent chromium; aqueous residue; /435/

Citation Formats

Turick, Charles E., and Apel, William W. Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater. United States: N. p., 1997. Web.
Turick, Charles E., & Apel, William W. Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater. United States.
Turick, Charles E., and Apel, William W. Tue . "Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater". United States. https://www.osti.gov/servlets/purl/871209.
@article{osti_871209,
title = {Method for in situ or ex situ bioremediation of hexavalent chromium contaminated soils and/or groundwater},
author = {Turick, Charles E. and Apel, William 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}

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