| Autor: |
Lebrón, Carmen A., McHale, Timothy, Young, Robroy, Williams, Dale, Bogaart, Matthew G., Major, David W., McMaster, Michaye L., Tasker, Ian, Akladiss, Naji |
| Zdroj: |
Remediation Journal; Mar2007, Vol. 17 Issue 2, p5-17, 13p |
| Abstrakt: |
An Interstate Technology and Regulatory Council (ITRC) forum was recently held that focused on six case studies in which bioremediation of dense nonaqueous-phase liquids (DNAPLs) was performed; the objective was to demonstrate that there is credible evidence for bioremediation as a viable environmental remediation technology. The first two case studies from the forum have been previously published; this third case study involves a pilot-scale demonstration that investigated the effects of biological activity on enhancing dissolution of an emplaced tetrachloroethene (PCE) DNAPL source. It used a controlled-release test cell with PCE as the primary DNAPL in a porous media groundwater system. Both laboratory tests and a field-scale pilot test demonstrated that bioaugmentation can stimulate complete dechlorination to a nontoxic end product and that the mass flux from a source zone increases when biological dehalorespiration activity is enhanced through nutrient (electron donor) addition and bioaugmentation. All project goals were met. Important achievements include demonstrating the ability to degrade a PCE DNAPL source to ethene and obtaining significant information on the impacts to the microbial populations and corresponding isotope enrichments during biodegradation of a source area. © 2007 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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