Development of an integrated, in-situ remediation technology. Topical report for task No. 6: lab-scale development of microbial degradation process, September 26, 1994--May 25, 1996

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Contamination in low permeability soils poses a significant technical challenge to in situ remediation efforts. Poor accessibility to the contaminants and difficulty in delivery of treatment reagents have rendered existing in situ treatments such as bioremediation, vapor extraction, and pump and treat rather ineffective when applied to low permeability soils present at many contaminated sites. The technology is an integrated in situ treatment in which established geotechnical methods are used to install degradation zones directly in the contaminated soil, and electro-osmosis is utilized to move the contaminants back and forth through those zones until the treatment is completed. The present ... continued below

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21 p.

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Odom, J.M. April 1, 1997.

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  • Odom, J.M. DuPont Central Research & Development, Wilmington, DE (United States)

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Description

Contamination in low permeability soils poses a significant technical challenge to in situ remediation efforts. Poor accessibility to the contaminants and difficulty in delivery of treatment reagents have rendered existing in situ treatments such as bioremediation, vapor extraction, and pump and treat rather ineffective when applied to low permeability soils present at many contaminated sites. The technology is an integrated in situ treatment in which established geotechnical methods are used to install degradation zones directly in the contaminated soil, and electro-osmosis is utilized to move the contaminants back and forth through those zones until the treatment is completed. The present Topical Report for Task No. 6 summarizes the results of a study of the potential for stimulating microbial reductive dehalogenation as part of the integrated in situ treatment process at the field experiment test site at DOE`s Gaseous Diffusion Plant in Paducah, Kentucky. A series of {open_quotes}microcosm bottle tests{close_quotes} were performed on samples of contaminated soil and groundwater taken from the Paducah site and spiked with trichloroethene (TCE). A number of bottles were set up, each spiked with a different carbon source in order to enhance the growth of different microbial subpopulations already present within the indigenous population in the soil. In addition, a series of bottle tests were completed with samples of the granular activated carbon (GAC) treatment zone material retrieved from the test site during the Paducah field experiment. In these tests, the GAC samples were used in place of the soil. Results of the soil-groundwater microcosms yielded a negative indication of the presence of dechlorinating bacteria at the site. However, charcoal (GAC) samples from one location in the test plot exhibited marked dechlorination with conversion of TCE to dichloroethene.

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21 p.

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INIS; OSTI as DE97002130

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  • Other Information: PBD: [1997]

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  • Other: DE97002130
  • Report No.: DOE/MC/31185--5388
  • Grant Number: AR21-94MC31185
  • DOI: 10.2172/465918 | External Link
  • Office of Scientific & Technical Information Report Number: 465918
  • Archival Resource Key: ark:/67531/metadc674739

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  • April 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • June 14, 2016, 3:01 p.m.

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Odom, J.M. Development of an integrated, in-situ remediation technology. Topical report for task No. 6: lab-scale development of microbial degradation process, September 26, 1994--May 25, 1996, report, April 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc674739/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.