Influence of Other Contaminants on Natural Attenuation of Chlorinated Solvents

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Studies at numerous sites have shown high variability in the degradation rates of chlorinated solvents as measured by microcosm studies with <sup>14</sup>C labeled contaminants. The ability of nutrient and carbon additions to stimulate degradation can vary widely. Although some of these variations can be related to the structure of the extant microbial community, the presence of other less refractory contaminants may be critical fctors impacting the rate of chlorocarbon mineralization. Relaatively highe rates of TCE degradation have been observed in the DOE K-25 burial grounds with diverse organic loadings as well as in areas that show evidence for hydrocarbon contamination. ... continued below

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7 Pages

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Kinsall, B.L.; Palumbo, A.V.; Pfiffner, S.M.; Phelps, T.J. & Salpas, P. April 19, 1999.

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Studies at numerous sites have shown high variability in the degradation rates of chlorinated solvents as measured by microcosm studies with <sup>14</sup>C labeled contaminants. The ability of nutrient and carbon additions to stimulate degradation can vary widely. Although some of these variations can be related to the structure of the extant microbial community, the presence of other less refractory contaminants may be critical fctors impacting the rate of chlorocarbon mineralization. Relaatively highe rates of TCE degradation have been observed in the DOE K-25 burial grounds with diverse organic loadings as well as in areas that show evidence for hydrocarbon contamination. Similarly, at other sites where there was TCE in the absence of hydrocarbons or other contaminants, the measured degradation rates have often been found to be very low. At various other sites, the intrasite variability in degradation rates appeared to be related to the presence of hydrocarbon contamination. The highest rates were observed at sites with evidence of hydrocarbons. These observations indicated that the viability of natural attenuation as a remediation option for chlorinated solvents might depend in part on the presence co-contaminants such as hydrocarbons or natural matter.

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7 Pages

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  • In Situ and On-Site Bioremediation, 5th International Symposium, April 19-22, 1999, San Diego, CA

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  • Other: DE00006131
  • Report No.: ORNL/CP-102540
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 6131
  • Archival Resource Key: ark:/67531/metadc692888

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Office of Scientific & Technical Information Technical Reports

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  • April 19, 1999

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  • Aug. 14, 2015, 8:43 a.m.

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  • July 25, 2016, 6:29 p.m.

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Kinsall, B.L.; Palumbo, A.V.; Pfiffner, S.M.; Phelps, T.J. & Salpas, P. Influence of Other Contaminants on Natural Attenuation of Chlorinated Solvents, article, April 19, 1999; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc692888/: accessed April 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.